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source/blender/blenkernel/intern/manta.c

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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) Blender Foundation.
* All rights reserved.
*/
/** \file
* \ingroup bke
*/
/* Part of the code copied from elbeem fluid library, copyright by Nils Thuerey */
#include "MEM_guardedalloc.h"
#include <float.h>
#include <math.h>
#include <stdio.h>
#include <string.h> /* memset */
#include "BLI_blenlib.h"
#include "BLI_math.h"
#include "BLI_kdopbvh.h"
#include "BLI_threads.h"
#include "BLI_utildefines.h"
#include "DNA_anim_types.h"
#include "DNA_armature_types.h"
#include "DNA_constraint_types.h"
#include "DNA_customdata_types.h"
#include "DNA_light_types.h"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_modifier_types.h"
#include "DNA_object_types.h"
#include "DNA_particle_types.h"
#include "DNA_scene_types.h"
#include "DNA_manta_types.h"
#include "BKE_appdir.h"
#include "BKE_animsys.h"
#include "BKE_armature.h"
#include "BKE_bvhutils.h"
#include "BKE_collision.h"
#include "BKE_colortools.h"
#include "BKE_constraint.h"
#include "BKE_customdata.h"
#include "BKE_deform.h"
#include "BKE_effect.h"
#include "BKE_library.h"
#include "BKE_mesh.h"
#include "BKE_mesh_runtime.h"
#include "BKE_modifier.h"
#include "BKE_object.h"
#include "BKE_particle.h"
#include "BKE_pointcache.h"
#include "BKE_scene.h"
#include "BKE_manta.h"
#include "BKE_texture.h"
#include "DEG_depsgraph.h"
#include "DEG_depsgraph_query.h"
#include "RE_shader_ext.h"
#include "GPU_glew.h"
/* UNUSED so far, may be enabled later */
/* #define USE_SMOKE_COLLISION_DM */
//#define DEBUG_TIME
#include "manta_fluid_API.h"
#ifdef DEBUG_TIME
# include "PIL_time.h"
#endif
# include "BLI_task.h"
# include "BLI_kdtree.h"
# include "BLI_voxel.h"
static ThreadMutex object_update_lock = BLI_MUTEX_INITIALIZER;
struct Mesh;
struct Object;
struct Scene;
struct MantaModifierData;
// timestep default value for nice appearance 0.1f
# define DT_DEFAULT 0.1f
# define ADD_IF_LOWER_POS(a, b) (min_ff((a) + (b), max_ff((a), (b))))
# define ADD_IF_LOWER_NEG(a, b) (max_ff((a) + (b), min_ff((a), (b))))
# define ADD_IF_LOWER(a, b) (((b) > 0) ? ADD_IF_LOWER_POS((a), (b)) : ADD_IF_LOWER_NEG((a), (b)))
void BKE_manta_reallocate_fluid(MantaDomainSettings *mds, int res[3], int free_old)
{
if (free_old && mds->fluid) {
manta_free(mds->fluid);
}
if (!min_iii(res[0], res[1], res[2])) {
mds->fluid = NULL;
return;
}
mds->fluid = manta_init(res, mds->mmd);
if (mds->flags & FLUID_DOMAIN_USE_NOISE) {
mds->res_noise[0] = res[0] * mds->noise_scale;
mds->res_noise[1] = res[1] * mds->noise_scale;
mds->res_noise[2] = res[2] * mds->noise_scale;
}
}
/* convert global position to domain cell space */
static void manta_pos_to_cell(MantaDomainSettings *mds, float pos[3])
{
mul_m4_v3(mds->imat, pos);
sub_v3_v3(pos, mds->p0);
pos[0] *= 1.0f / mds->cell_size[0];
pos[1] *= 1.0f / mds->cell_size[1];
pos[2] *= 1.0f / mds->cell_size[2];
}
/* set domain transformations and base resolution from object mesh */
static void manta_set_domain_from_mesh(MantaDomainSettings *mds,
Object *ob,
Mesh *me,
bool init_resolution)
{
size_t i;
float min[3] = {FLT_MAX, FLT_MAX, FLT_MAX}, max[3] = {-FLT_MAX, -FLT_MAX, -FLT_MAX};
float size[3];
MVert *verts = me->mvert;
float scale = 0.0;
int res;
res = mds->maxres;
// get BB of domain
for (i = 0; i < me->totvert; i++) {
// min BB
min[0] = MIN2(min[0], verts[i].co[0]);
min[1] = MIN2(min[1], verts[i].co[1]);
min[2] = MIN2(min[2], verts[i].co[2]);
// max BB
max[0] = MAX2(max[0], verts[i].co[0]);
max[1] = MAX2(max[1], verts[i].co[1]);
max[2] = MAX2(max[2], verts[i].co[2]);
}
/* set domain bounds */
copy_v3_v3(mds->p0, min);
copy_v3_v3(mds->p1, max);
mds->dx = 1.0f / res;
/* calculate domain dimensions */
sub_v3_v3v3(size, max, min);
if (init_resolution) {
zero_v3_int(mds->base_res);
copy_v3_v3(mds->cell_size, size);
}
/* apply object scale */
for (i = 0; i < 3; i++) {
size[i] = fabsf(size[i] * ob->scale[i]);
}
copy_v3_v3(mds->global_size, size);
copy_v3_v3(mds->dp0, min);
invert_m4_m4(mds->imat, ob->obmat);
// prevent crash when initializing a plane as domain
if (!init_resolution || (size[0] < FLT_EPSILON) || (size[1] < FLT_EPSILON) ||
(size[2] < FLT_EPSILON)) {
return;
}
/* define grid resolutions from longest domain side */
if (size[0] >= MAX2(size[1], size[2])) {
scale = res / size[0];
mds->scale = size[0] / fabsf(ob->scale[0]);
mds->base_res[0] = res;
mds->base_res[1] = max_ii((int)(size[1] * scale + 0.5f), 4);
mds->base_res[2] = max_ii((int)(size[2] * scale + 0.5f), 4);
}
else if (size[1] >= MAX2(size[0], size[2])) {
scale = res / size[1];
mds->scale = size[1] / fabsf(ob->scale[1]);
mds->base_res[0] = max_ii((int)(size[0] * scale + 0.5f), 4);
mds->base_res[1] = res;
mds->base_res[2] = max_ii((int)(size[2] * scale + 0.5f), 4);
}
else {
scale = res / size[2];
mds->scale = size[2] / fabsf(ob->scale[2]);
mds->base_res[0] = max_ii((int)(size[0] * scale + 0.5f), 4);
mds->base_res[1] = max_ii((int)(size[1] * scale + 0.5f), 4);
mds->base_res[2] = res;
}
/* set cell size */
mds->cell_size[0] /= (float)mds->base_res[0];
mds->cell_size[1] /= (float)mds->base_res[1];
mds->cell_size[2] /= (float)mds->base_res[2];
}
static void manta_set_domain_gravity(Scene *scene, MantaDomainSettings *mds)
{
float gravity[3] = {0.0f, 0.0f, -1.0f};
float gravity_mag;
/* use global gravity if enabled */
if (scene->physics_settings.flag & PHYS_GLOBAL_GRAVITY) {
copy_v3_v3(gravity, scene->physics_settings.gravity);
/* map default value to 1.0 */
mul_v3_fl(gravity, 1.0f / 9.810f);
/* convert gravity to domain space */
gravity_mag = len_v3(gravity);
mul_mat3_m4_v3(mds->imat, gravity);
normalize_v3(gravity);
mul_v3_fl(gravity, gravity_mag);
mds->gravity[0] = gravity[0];
mds->gravity[1] = gravity[1];
mds->gravity[2] = gravity[2];
}
}
static int mantaModifier_init(
MantaModifierData *mmd, Depsgraph *depsgraph, Object *ob, Scene *scene, Mesh *me)
{
int scene_framenr = (int)DEG_get_ctime(depsgraph);
if ((mmd->type & MOD_MANTA_TYPE_DOMAIN) && mmd->domain && !mmd->domain->fluid) {
MantaDomainSettings *mds = mmd->domain;
int res[3];
/* set domain dimensions from mesh */
manta_set_domain_from_mesh(mds, ob, me, true);
/* set domain gravity */
manta_set_domain_gravity(scene, mds);
/* reset domain values */
zero_v3_int(mds->shift);
zero_v3(mds->shift_f);
add_v3_fl(mds->shift_f, 0.5f);
zero_v3(mds->prev_loc);
mul_m4_v3(ob->obmat, mds->prev_loc);
copy_m4_m4(mds->obmat, ob->obmat);
/* set resolutions */
if (mmd->domain->type == FLUID_DOMAIN_TYPE_GAS &&
mmd->domain->flags & FLUID_DOMAIN_USE_ADAPTIVE_DOMAIN)
{
res[0] = res[1] = res[2] = 1; /* use minimum res for adaptive init */
}
else {
copy_v3_v3_int(res, mds->base_res);
}
copy_v3_v3_int(mds->res, res);
mds->total_cells = mds->res[0] * mds->res[1] * mds->res[2];
mds->res_min[0] = mds->res_min[1] = mds->res_min[2] = 0;
copy_v3_v3_int(mds->res_max, res);
/* set time, frame length = 0.1 is at 25fps */
float fps = scene->r.frs_sec / scene->r.frs_sec_base;
mds->frame_length = DT_DEFAULT * (25.0f / fps) * mds->time_scale;
/* initially dt is equal to frame length (dt can change with adaptive-time stepping though) */
mds->dt = mds->frame_length;
mds->time_per_frame = 0;
mds->time_total = (scene_framenr-1) * mds->frame_length;
/* allocate fluid */
BKE_manta_reallocate_fluid(mds, mds->res, 0);
mmd->time = scene_framenr;
return 1;
}
else if (mmd->type & MOD_MANTA_TYPE_FLOW) {
if (!mmd->flow) {
mantaModifier_createType(mmd);
}
mmd->time = scene_framenr;
return 1;
}
else if (mmd->type & MOD_MANTA_TYPE_EFFEC) {
if (!mmd->effec) {
mantaModifier_createType(mmd);
}
mmd->time = scene_framenr;
return 1;
}
return 0;
}
static void mantaModifier_freeDomain(MantaModifierData *mmd)
{
if (mmd->domain) {
if (mmd->domain->fluid) {
manta_free(mmd->domain->fluid);
}
if (mmd->domain->fluid_mutex) {
BLI_rw_mutex_free(mmd->domain->fluid_mutex);
}
if (mmd->domain->effector_weights) {
MEM_freeN(mmd->domain->effector_weights);
}
mmd->domain->effector_weights = NULL;
if (!(mmd->modifier.flag & eModifierFlag_SharedCaches)) {
BKE_ptcache_free_list(&(mmd->domain->ptcaches[0]));
mmd->domain->point_cache[0] = NULL;
}
if (mmd->domain->mesh_velocities) {
MEM_freeN(mmd->domain->mesh_velocities);
}
mmd->domain->mesh_velocities = NULL;
if (mmd->domain->coba) {
MEM_freeN(mmd->domain->coba);
}
MEM_freeN(mmd->domain);
mmd->domain = NULL;
}
}
static void mantaModifier_freeFlow(MantaModifierData *mmd)
{
if (mmd->flow) {
if (mmd->flow->mesh) {
BKE_id_free(NULL, mmd->flow->mesh);
}
mmd->flow->mesh = NULL;
if (mmd->flow->verts_old) {
MEM_freeN(mmd->flow->verts_old);
}
mmd->flow->verts_old = NULL;
mmd->flow->numverts = 0;
MEM_freeN(mmd->flow);
mmd->flow = NULL;
}
}
static void mantaModifier_freeCollision(MantaModifierData *mmd)
{
if (mmd->effec) {
if (mmd->effec->mesh) {
BKE_id_free(NULL, mmd->effec->mesh);
}
mmd->effec->mesh = NULL;
if (mmd->effec->verts_old) {
MEM_freeN(mmd->effec->verts_old);
}
mmd->effec->verts_old = NULL;
mmd->effec->numverts = 0;
MEM_freeN(mmd->effec);
mmd->effec = NULL;
}
}
static void mantaModifier_reset_ex(struct MantaModifierData *mmd, bool need_lock)
{
if (mmd) {
if (mmd->domain) {
if (mmd->domain->fluid) {
if (need_lock) {
BLI_rw_mutex_lock(mmd->domain->fluid_mutex, THREAD_LOCK_WRITE);
}
manta_free(mmd->domain->fluid);
mmd->domain->fluid = NULL;
if (need_lock) {
BLI_rw_mutex_unlock(mmd->domain->fluid_mutex);
}
}
mmd->time = -1;
mmd->domain->total_cells = 0;
mmd->domain->active_fields = 0;
}
else if (mmd->flow) {
if (mmd->flow->verts_old) {
MEM_freeN(mmd->flow->verts_old);
}
mmd->flow->verts_old = NULL;
mmd->flow->numverts = 0;
}
else if (mmd->effec) {
if (mmd->effec->verts_old) {
MEM_freeN(mmd->effec->verts_old);
}
mmd->effec->verts_old = NULL;
mmd->effec->numverts = 0;
}
}
}
void mantaModifier_reset(struct MantaModifierData *mmd)
{
sergeyUnsubmitted
Done
Inline Actions

min_ff

sergey: `min_ff`
mantaModifier_reset_ex(mmd, true);
}
void mantaModifier_free(MantaModifierData *mmd)
{
sergeyUnsubmitted
Done
Inline Actions

max_ff

In fact, minmax_v3v3_v3.

sergey: `max_ff` In fact, `minmax_v3v3_v3`.
if (mmd) {
mantaModifier_freeDomain(mmd);
mantaModifier_freeFlow(mmd);
mantaModifier_freeCollision(mmd);
}
}
void mantaModifier_createType(struct MantaModifierData *mmd)
{
if (mmd) {
if (mmd->type & MOD_MANTA_TYPE_DOMAIN) {
if (mmd->domain) {
mantaModifier_freeDomain(mmd);
}
/* domain object data */
mmd->domain = MEM_callocN(sizeof(MantaDomainSettings), "MantaDomain");
mmd->domain->mmd = mmd;
mmd->domain->effector_weights = BKE_effector_add_weights(NULL);
mmd->domain->fluid = NULL;
mmd->domain->fluid_mutex = BLI_rw_mutex_alloc();
mmd->domain->eff_group = NULL;
mmd->domain->fluid_group = NULL;
mmd->domain->coll_group = NULL;
/* adaptive domain options */
mmd->domain->adapt_margin = 4;
mmd->domain->adapt_res = 0;
mmd->domain->adapt_threshold = 0.02f;
/* fluid domain options */
mmd->domain->maxres = 64;
mmd->domain->solver_res = 3;
mmd->domain->border_collisions = 0; // open domain
mmd->domain->flags = FLUID_DOMAIN_USE_DISSOLVE_LOG | FLUID_DOMAIN_USE_ADAPTIVE_TIME;
mmd->domain->gravity[0] = 0.0f;
mmd->domain->gravity[1] = 0.0f;
mmd->domain->gravity[2] = -1.0f;
mmd->domain->active_fields = 0;
mmd->domain->type = FLUID_DOMAIN_TYPE_GAS;
mmd->domain->boundary_width = 1;
/* smoke domain options */
mmd->domain->alpha = 1.0f;
mmd->domain->beta = 1.0f;
mmd->domain->diss_speed = 5;
mmd->domain->vorticity = 0;
mmd->domain->active_color[0] = 0.0f;
mmd->domain->active_color[1] = 0.0f;
mmd->domain->active_color[2] = 0.0f;
mmd->domain->highres_sampling = SM_HRES_FULLSAMPLE;
/* flame options */
mmd->domain->burning_rate = 0.75f;
mmd->domain->flame_smoke = 1.0f;
mmd->domain->flame_vorticity = 0.5f;
mmd->domain->flame_ignition = 1.5f;
mmd->domain->flame_max_temp = 3.0f;
mmd->domain->flame_smoke_color[0] = 0.7f;
mmd->domain->flame_smoke_color[1] = 0.7f;
mmd->domain->flame_smoke_color[2] = 0.7f;
/* noise options */
mmd->domain->noise_strength = 1.0;
mmd->domain->noise_pos_scale = 2.0f;
mmd->domain->noise_time_anim = 0.1f;
mmd->domain->noise_scale = 2;
mmd->domain->noise_type = FLUID_NOISE_TYPE_WAVELET;
/* liquid domain options */
mmd->domain->particle_randomness = 0.1f;
mmd->domain->particle_number = 2;
mmd->domain->particle_minimum = 8;
mmd->domain->particle_maximum = 16;
mmd->domain->particle_radius = 1.8f;
mmd->domain->particle_band_width = 3.0f;
sergeyUnsubmitted
Done
Inline Actions

copy_v3_v3

sergey: `copy_v3_v3`
/* diffusion options*/
mmd->domain->surface_tension = 0.0f;
mmd->domain->viscosity_base = 1.0f;
mmd->domain->viscosity_exponent = 6.0f;
mmd->domain->domain_size = 0.5f;
sergeyUnsubmitted
Done
Inline Actions

int -> bool ?

sergey: `int` -> `bool` ?
/* mesh options */
mmd->domain->mesh_velocities = NULL;
mmd->domain->mesh_concave_upper = 3.5f;
mmd->domain->mesh_concave_lower = 0.4f;
mmd->domain->mesh_smoothen_pos = 1;
mmd->domain->mesh_smoothen_neg = 1;
mmd->domain->mesh_scale = 2;
mmd->domain->totvert = 0;
mmd->domain->mesh_generator = FLUID_DOMAIN_MESH_IMPROVED;
/* secondary particle options */
mmd->domain->sndparticle_tau_min_wc = 2.0;
mmd->domain->sndparticle_tau_max_wc = 8.0;
mmd->domain->sndparticle_tau_min_ta = 5.0;
mmd->domain->sndparticle_tau_max_ta = 20.0;
mmd->domain->sndparticle_tau_min_k = 1.0;
mmd->domain->sndparticle_tau_max_k = 5.0;
mmd->domain->sndparticle_k_wc = 200;
mmd->domain->sndparticle_k_ta = 40;
mmd->domain->sndparticle_k_b = 0.5;
mmd->domain->sndparticle_k_d = 0.6;
mmd->domain->sndparticle_l_min = 10.0;
mmd->domain->sndparticle_l_max = 25.0;
mmd->domain->sndparticle_boundary = SNDPARTICLE_BOUNDARY_DELETE;
mmd->domain->sndparticle_combined_export = SNDPARTICLE_COMBINED_EXPORT_OFF;
mmd->domain->sndparticle_potential_radius = 2;
mmd->domain->sndparticle_update_radius = 2;
mmd->domain->particle_type = 0;
mmd->domain->particle_scale = 1;
/* fluid guiding options */
mmd->domain->guiding_parent = NULL;
mmd->domain->guiding_alpha = 2.0f;
mmd->domain->guiding_beta = 5;
mmd->domain->guiding_vel_factor = 2.0f;
mmd->domain->guide_res = NULL;
mmd->domain->guiding_source = FLUID_DOMAIN_GUIDING_SRC_DOMAIN;
/* cache options */
mmd->domain->cache_frame_start = 1;
mmd->domain->cache_frame_end = 50;
mmd->domain->cache_frame_pause_data = 0;
mmd->domain->cache_frame_pause_noise = 0;
mmd->domain->cache_frame_pause_mesh = 0;
mmd->domain->cache_frame_pause_particles = 0;
mmd->domain->cache_frame_pause_guiding = 0;
mmd->domain->cache_flag = 0;
mmd->domain->cache_mesh_format = FLUID_DOMAIN_FILE_BIN_OBJECT;
mmd->domain->cache_data_format = FLUID_DOMAIN_FILE_UNI;
mmd->domain->cache_particle_format = FLUID_DOMAIN_FILE_UNI;
mmd->domain->cache_noise_format = FLUID_DOMAIN_FILE_UNI;
modifier_path_init(mmd->domain->cache_directory,
sizeof(mmd->domain->cache_directory),
FLUID_DOMAIN_DIR_DEFAULT);
/* time options */
mmd->domain->time_scale = 1.0;
mmd->domain->cfl_condition = 4.0;
/* display options */
mmd->domain->slice_method = FLUID_DOMAIN_SLICE_VIEW_ALIGNED;
mmd->domain->axis_slice_method = AXIS_SLICE_FULL;
mmd->domain->slice_axis = 0;
mmd->domain->interp_method = 0;
mmd->domain->draw_velocity = false;
mmd->domain->slice_per_voxel = 5.0f;
mmd->domain->slice_depth = 0.5f;
mmd->domain->display_thickness = 1.0f;
mmd->domain->coba = NULL;
mmd->domain->vector_scale = 1.0f;
mmd->domain->vector_draw_type = VECTOR_DRAW_NEEDLE;
mmd->domain->use_coba = false;
mmd->domain->coba_field = FLUID_DOMAIN_FIELD_DENSITY;
/* -- Deprecated / unsed options (below)-- */
/* pointcache options */
BLI_listbase_clear(&mmd->domain->ptcaches[1]);
mmd->domain->point_cache[0] = BKE_ptcache_add(&(mmd->domain->ptcaches[0]));
mmd->domain->point_cache[0]->flag |= PTCACHE_DISK_CACHE;
mmd->domain->point_cache[0]->step = 1;
mmd->domain->point_cache[1] = NULL; /* Deprecated */
mmd->domain->cache_comp = SM_CACHE_LIGHT;
mmd->domain->cache_high_comp = SM_CACHE_LIGHT;
/* OpenVDB cache options */
#ifdef WITH_OPENVDB_BLOSC
mmd->domain->openvdb_comp = VDB_COMPRESSION_BLOSC;
#else
mmd->domain->openvdb_comp = VDB_COMPRESSION_ZIP;
#endif
mmd->domain->clipping = 1e-3f;
mmd->domain->data_depth = 0;
}
else if (mmd->type & MOD_MANTA_TYPE_FLOW) {
if (mmd->flow) {
mantaModifier_freeFlow(mmd);
}
/* flow object data */
mmd->flow = MEM_callocN(sizeof(MantaFlowSettings), "MantaFlow");
mmd->flow->mmd = mmd;
mmd->flow->mesh = NULL;
mmd->flow->psys = NULL;
mmd->flow->noise_texture = NULL;
/* initial velocity */
mmd->flow->verts_old = NULL;
mmd->flow->numverts = 0;
mmd->flow->vel_multi = 1.0f;
mmd->flow->vel_normal = 0.0f;
mmd->flow->vel_random = 0.0f;
mmd->flow->vel_coord[0] = 0.0f;
mmd->flow->vel_coord[1] = 0.0f;
mmd->flow->vel_coord[2] = 0.0f;
/* emission */
mmd->flow->density = 1.0f;
mmd->flow->color[0] = 0.7f;
mmd->flow->color[1] = 0.7f;
mmd->flow->color[2] = 0.7f;
sergeyUnsubmitted
Done
Inline Actions

What's effec ?

sergey: What's `effec` ?
sebbasAuthorUnsubmitted
Done
Inline Actions

It's referring to effector. Effector objects are objects that have can have an effect on the simulation (e.g. collision objects, guiding objects). I.e. their movement applies a force onto the simulation.

sebbas: It's referring to effector. Effector objects are objects that have can have an effect on the…
sergeyUnsubmitted
Done
Inline Actions

So why not to call it effector ?

sergey: So why not to call it `effector` ?
sebbasAuthorUnsubmitted
Done
Inline Actions

Yes, that's a good idea.

sebbas: Yes, that's a good idea.
mmd->flow->fuel_amount = 1.0f;
mmd->flow->temp = 1.0f;
mmd->flow->volume_density = 0.0f;
mmd->flow->surface_distance = 1.5f;
mmd->flow->particle_size = 1.0f;
mmd->flow->subframes = 0;
/* texture control */
mmd->flow->source = FLUID_FLOW_SOURCE_MESH;
mmd->flow->texture_size = 1.0f;
mmd->flow->type = FLUID_FLOW_TYPE_SMOKE;
mmd->flow->behavior = FLUID_FLOW_BEHAVIOR_GEOMETRY;
mmd->flow->type = FLUID_FLOW_TYPE_SMOKE;
mmd->flow->flags = FLUID_FLOW_ABSOLUTE | FLUID_FLOW_USE_PART_SIZE | FLUID_FLOW_USE_INFLOW;
}
else if (mmd->type & MOD_MANTA_TYPE_EFFEC) {
if (mmd->effec) {
mantaModifier_freeCollision(mmd);
}
/* effector object data */
mmd->effec = MEM_callocN(sizeof(MantaCollSettings), "MantaColl");
mmd->effec->mmd = mmd;
mmd->effec->mesh = NULL;
mmd->effec->verts_old = NULL;
mmd->effec->numverts = 0;
mmd->effec->surface_distance = 0.5f;
mmd->effec->type = FLUID_EFFECTOR_TYPE_COLLISION;
/* guiding options */
mmd->effec->guiding_mode = FLUID_EFFECTOR_GUIDING_MAXIMUM;
mmd->effec->vel_multi = 1.0f;
}
}
}
void mantaModifier_copy(const struct MantaModifierData *mmd,
struct MantaModifierData *tmmd,
const int flag)
{
tmmd->type = mmd->type;
tmmd->time = mmd->time;
mantaModifier_createType(tmmd);
if (tmmd->domain) {
MantaDomainSettings *tmds = tmmd->domain;
MantaDomainSettings *mds = mmd->domain;
/* domain object data */
tmds->fluid_group = mds->fluid_group;
tmds->eff_group = mds->eff_group;
tmds->coll_group = mds->coll_group;
MEM_freeN(tmds->effector_weights);
tmds->effector_weights = MEM_dupallocN(mds->effector_weights);
/* adaptive domain options */
tmds->adapt_margin = mds->adapt_margin;
tmds->adapt_res = mds->adapt_res;
tmds->adapt_threshold = mds->adapt_threshold;
/* fluid domain options */
tmds->maxres = mds->maxres;
tmds->solver_res = mds->solver_res;
tmds->border_collisions = mds->border_collisions;
tmds->flags = mds->flags;
tmds->gravity[0] = mds->gravity[0];
tmds->gravity[1] = mds->gravity[1];
tmds->gravity[2] = mds->gravity[2];
tmds->active_fields = mds->active_fields;
sergeyUnsubmitted
Done
Inline Actions

Use early outputs.

sergey: Use early outputs.
sebbasAuthorUnsubmitted
Done
Inline Actions

Yup agree, fewer indents == more horizontal space.

sebbas: Yup agree, fewer indents == more horizontal space.
tmds->type = mds->type;
tmds->boundary_width = mds->boundary_width;
/* smoke domain options */
tmds->alpha = mds->alpha;
tmds->beta = mds->beta;
tmds->diss_speed = mds->diss_speed;
tmds->vorticity = mds->vorticity;
tmds->highres_sampling = mds->highres_sampling;
/* flame options */
tmds->burning_rate = mds->burning_rate;
tmds->flame_smoke = mds->flame_smoke;
tmds->flame_vorticity = mds->flame_vorticity;
tmds->flame_ignition = mds->flame_ignition;
tmds->flame_max_temp = mds->flame_max_temp;
copy_v3_v3(tmds->flame_smoke_color, mds->flame_smoke_color);
/* noise options */
tmds->noise_strength = mds->noise_strength;
tmds->noise_pos_scale = mds->noise_pos_scale;
tmds->noise_time_anim = mds->noise_time_anim;
tmds->noise_scale = mds->noise_scale;
tmds->noise_type = mds->noise_type;
/* liquid domain options */
tmds->particle_randomness = mds->particle_randomness;
tmds->particle_number = mds->particle_number;
tmds->particle_minimum = mds->particle_minimum;
tmds->particle_maximum = mds->particle_maximum;
tmds->particle_radius = mds->particle_radius;
tmds->particle_band_width = mds->particle_band_width;
/* diffusion options*/
tmds->surface_tension = mds->surface_tension;
tmds->viscosity_base = mds->viscosity_base;
tmds->viscosity_exponent = mds->viscosity_exponent;
tmds->domain_size = mds->domain_size;
/* mesh options */
if (mds->mesh_velocities) {
tmds->mesh_velocities = MEM_dupallocN(mds->mesh_velocities);
}
tmds->mesh_concave_upper = mds->mesh_concave_upper;
tmds->mesh_concave_lower = mds->mesh_concave_lower;
tmds->mesh_smoothen_pos = mds->mesh_smoothen_pos;
tmds->mesh_smoothen_neg = mds->mesh_smoothen_neg;
tmds->mesh_scale = mds->mesh_scale;
tmds->totvert = mds->totvert;
tmds->mesh_generator = mds->mesh_generator;
/* secondary particle options */
tmds->sndparticle_k_b = mds->sndparticle_k_b;
tmds->sndparticle_k_d = mds->sndparticle_k_d;
tmds->sndparticle_k_ta = mds->sndparticle_k_ta;
tmds->sndparticle_k_wc = mds->sndparticle_k_wc;
tmds->sndparticle_l_max = mds->sndparticle_l_max;
tmds->sndparticle_l_min = mds->sndparticle_l_min;
tmds->sndparticle_tau_max_k = mds->sndparticle_tau_max_k;
tmds->sndparticle_tau_max_ta = mds->sndparticle_tau_max_ta;
tmds->sndparticle_tau_max_wc = mds->sndparticle_tau_max_wc;
tmds->sndparticle_tau_min_k = mds->sndparticle_tau_min_k;
tmds->sndparticle_tau_min_ta = mds->sndparticle_tau_min_ta;
tmds->sndparticle_tau_min_wc = mds->sndparticle_tau_min_wc;
tmds->sndparticle_boundary = mds->sndparticle_boundary;
tmds->sndparticle_combined_export = mds->sndparticle_combined_export;
tmds->sndparticle_potential_radius = mds->sndparticle_potential_radius;
tmds->sndparticle_update_radius = mds->sndparticle_update_radius;
tmds->particle_type = mds->particle_type;
tmds->particle_scale = mds->particle_scale;
/* fluid guiding options */
tmds->guiding_parent = mds->guiding_parent;
tmds->guiding_alpha = mds->guiding_alpha;
tmds->guiding_beta = mds->guiding_beta;
tmds->guiding_vel_factor = mds->guiding_vel_factor;
tmds->guide_res = mds->guide_res;
tmds->guiding_source = mds->guiding_source;
/* cache options */
tmds->cache_frame_start = mds->cache_frame_start;
tmds->cache_frame_end = mds->cache_frame_end;
tmds->cache_frame_pause_data = mds->cache_frame_pause_data;
tmds->cache_frame_pause_noise = mds->cache_frame_pause_noise;
tmds->cache_frame_pause_mesh = mds->cache_frame_pause_mesh;
tmds->cache_frame_pause_particles = mds->cache_frame_pause_particles;
tmds->cache_frame_pause_guiding = mds->cache_frame_pause_guiding;
tmds->cache_flag = mds->cache_flag;
tmds->cache_mesh_format = mds->cache_mesh_format;
tmds->cache_data_format = mds->cache_data_format;
tmds->cache_particle_format = mds->cache_particle_format;
tmds->cache_noise_format = mds->cache_noise_format;
BLI_strncpy(tmds->cache_directory, mds->cache_directory, sizeof(tmds->cache_directory));
/* time options */
tmds->time_scale = mds->time_scale;
tmds->cfl_condition = mds->cfl_condition;
/* display options */
tmds->slice_method = mds->slice_method;
tmds->axis_slice_method = mds->axis_slice_method;
tmds->slice_axis = mds->slice_axis;
tmds->interp_method = mds->interp_method;
tmds->draw_velocity = mds->draw_velocity;
tmds->slice_per_voxel = mds->slice_per_voxel;
tmds->slice_depth = mds->slice_depth;
tmds->display_thickness = mds->display_thickness;
if (mds->coba) {
tmds->coba = MEM_dupallocN(mds->coba);
}
tmds->vector_scale = mds->vector_scale;
tmds->vector_draw_type = mds->vector_draw_type;
tmds->use_coba = mds->use_coba;
tmds->coba_field = mds->coba_field;
/* -- Deprecated / unsed options (below)-- */
/* pointcache options */
BKE_ptcache_free_list(&(tmds->ptcaches[0]));
if (flag & LIB_ID_CREATE_NO_MAIN) {
/* Share the cache with the original object's modifier. */
tmmd->modifier.flag |= eModifierFlag_SharedCaches;
tmds->point_cache[0] = mds->point_cache[0];
tmds->ptcaches[0] = mds->ptcaches[0];
}
else {
tmds->point_cache[0] = BKE_ptcache_copy_list(
&(tmds->ptcaches[0]), &(mds->ptcaches[0]), flag);
}
/* OpenVDB cache options */
tmds->openvdb_comp = mds->openvdb_comp;
tmds->clipping = mds->clipping;
tmds->data_depth = mds->data_depth;
}
else if (tmmd->flow) {
MantaFlowSettings *tsfs = tmmd->flow;
MantaFlowSettings *sfs = mmd->flow;
tsfs->psys = sfs->psys;
tsfs->noise_texture = sfs->noise_texture;
/* initial velocity */
tsfs->vel_multi = sfs->vel_multi;
tsfs->vel_normal = sfs->vel_normal;
tsfs->vel_random = sfs->vel_random;
tsfs->vel_coord[0] = sfs->vel_coord[0];
tsfs->vel_coord[1] = sfs->vel_coord[1];
tsfs->vel_coord[2] = sfs->vel_coord[2];
/* emission */
tsfs->density = sfs->density;
copy_v3_v3(tsfs->color, sfs->color);
tsfs->fuel_amount = sfs->fuel_amount;
tsfs->temp = sfs->temp;
tsfs->volume_density = sfs->volume_density;
tsfs->surface_distance = sfs->surface_distance;
tsfs->particle_size = sfs->particle_size;
tsfs->subframes = sfs->subframes;
/* texture control */
tsfs->texture_size = sfs->texture_size;
tsfs->texture_offset = sfs->texture_offset;
BLI_strncpy(tsfs->uvlayer_name, sfs->uvlayer_name, sizeof(tsfs->uvlayer_name));
tsfs->vgroup_density = sfs->vgroup_density;
tsfs->type = sfs->type;
tsfs->behavior = sfs->behavior;
tsfs->source = sfs->source;
tsfs->texture_type = sfs->texture_type;
tsfs->flags = sfs->flags;
}
else if (tmmd->effec) {
MantaCollSettings *tscs = tmmd->effec;
MantaCollSettings *scs = mmd->effec;
tscs->surface_distance = scs->surface_distance;
tscs->type = scs->type;
/* guiding options */
tscs->guiding_mode = scs->guiding_mode;
tscs->vel_multi = scs->vel_multi;
}
}
// forward declaration
static void manta_smoke_calc_transparency(MantaDomainSettings *mds, ViewLayer *view_layer);
static float calc_voxel_transp(
float *result, float *input, int res[3], int *pixel, float *tRay, float correct);
static void update_mesh_distances(int index,
float *mesh_distances,
BVHTreeFromMesh *treeData,
const float ray_start[3],
float surface_thickness);
static int get_light(ViewLayer *view_layer, float *light)
{
Base *base_tmp = NULL;
int found_light = 0;
// try to find a lamp, preferably local
for (base_tmp = FIRSTBASE(view_layer); base_tmp; base_tmp = base_tmp->next) {
if (base_tmp->object->type == OB_LAMP) {
Light *la = base_tmp->object->data;
if (la->type == LA_LOCAL) {
copy_v3_v3(light, base_tmp->object->obmat[3]);
return 1;
}
else if (!found_light) {
copy_v3_v3(light, base_tmp->object->obmat[3]);
found_light = 1;
}
}
}
return found_light;
}
/**********************************************************
* Obstacles
**********************************************************/
typedef struct ObstaclesFromDMData {
MantaDomainSettings *mds;
MantaCollSettings *scs;
const MVert *mvert;
const MLoop *mloop;
const MLoopTri *looptri;
BVHTreeFromMesh *tree;
bool has_velocity;
float *vert_vel;
float *velocityX, *velocityY, *velocityZ;
int *num_objects;
float *distances_map;
} ObstaclesFromDMData;
static void obstacles_from_mesh_task_cb(void *__restrict userdata,
const int z,
const TaskParallelTLS *__restrict UNUSED(tls))
{
ObstaclesFromDMData *data = userdata;
MantaDomainSettings *mds = data->mds;
/* slightly rounded-up sqrt(3 * (0.5)^2) == max. distance of cell boundary along the diagonal */
const float surface_distance = 2.0f; //0.867f;
/* Note: Use larger surface distance to cover larger area with obvel. Manta will use these obvels and extrapolate them (inside and outside obstacle) */
for (int x = mds->res_min[0]; x < mds->res_max[0]; x++) {
for (int y = mds->res_min[1]; y < mds->res_max[1]; y++) {
const int index = manta_get_index(
x - mds->res_min[0], mds->res[0], y - mds->res_min[1], mds->res[1], z - mds->res_min[2]);
float ray_start[3] = {(float)x + 0.5f, (float)y + 0.5f, (float)z + 0.5f};
BVHTreeNearest nearest = {0};
nearest.index = -1;
nearest.dist_sq = surface_distance *
surface_distance; /* find_nearest uses squared distance */
bool hasIncObj = false;
/* find the nearest point on the mesh */
if (BLI_bvhtree_find_nearest(
data->tree->tree, ray_start, &nearest, data->tree->nearest_callback, data->tree) !=
-1) {
const MLoopTri *lt = &data->looptri[nearest.index];
float weights[3];
int v1, v2, v3;
/* calculate barycentric weights for nearest point */
v1 = data->mloop[lt->tri[0]].v;
v2 = data->mloop[lt->tri[1]].v;
v3 = data->mloop[lt->tri[2]].v;
interp_weights_tri_v3(
weights, data->mvert[v1].co, data->mvert[v2].co, data->mvert[v3].co, nearest.co);
if (data->has_velocity) {
/* increase object count */
data->num_objects[index]++;
hasIncObj = true;
/* apply object velocity */
float hit_vel[3];
interp_v3_v3v3v3(hit_vel,
&data->vert_vel[v1 * 3],
&data->vert_vel[v2 * 3],
&data->vert_vel[v3 * 3],
weights);
/* Guiding has additional velocity multiplier */
if (data->scs->type == FLUID_EFFECTOR_TYPE_GUIDE) {
mul_v3_fl(hit_vel, data->scs->vel_multi);
switch (data->scs->guiding_mode) {
case FLUID_EFFECTOR_GUIDING_AVERAGED:
data->velocityX[index] = (data->velocityX[index] + hit_vel[0]) * 0.5f;
data->velocityY[index] = (data->velocityY[index] + hit_vel[1]) * 0.5f;
data->velocityZ[index] = (data->velocityZ[index] + hit_vel[2]) * 0.5f;
break;
case FLUID_EFFECTOR_GUIDING_OVERRIDE:
data->velocityX[index] = hit_vel[0];
data->velocityY[index] = hit_vel[1];
data->velocityZ[index] = hit_vel[2];
break;
case FLUID_EFFECTOR_GUIDING_MINIMUM:
data->velocityX[index] = MIN2(fabsf(hit_vel[0]), fabsf(data->velocityX[index]));
data->velocityY[index] = MIN2(fabsf(hit_vel[1]), fabsf(data->velocityY[index]));
data->velocityZ[index] = MIN2(fabsf(hit_vel[2]), fabsf(data->velocityZ[index]));
break;
case FLUID_EFFECTOR_GUIDING_MAXIMUM:
default:
data->velocityX[index] = MAX2(fabsf(hit_vel[0]), fabsf(data->velocityX[index]));
data->velocityY[index] = MAX2(fabsf(hit_vel[1]), fabsf(data->velocityY[index]));
data->velocityZ[index] = MAX2(fabsf(hit_vel[2]), fabsf(data->velocityZ[index]));
break;
}
}
else {
/* Apply (i.e. add) effector object velocity */
data->velocityX[index] += (data->scs->type == FLUID_EFFECTOR_TYPE_GUIDE) ?
hit_vel[0] * data->scs->vel_multi :
hit_vel[0];
data->velocityY[index] += (data->scs->type == FLUID_EFFECTOR_TYPE_GUIDE) ?
hit_vel[1] * data->scs->vel_multi :
hit_vel[1];
data->velocityZ[index] += (data->scs->type == FLUID_EFFECTOR_TYPE_GUIDE) ?
hit_vel[2] * data->scs->vel_multi :
hit_vel[2];
//printf("adding effector object vel: [%f, %f, %f], dx is: %f\n", hit_vel[0], hit_vel[1], hit_vel[2], mds->dx);
}
}
}
/* Get distance to mesh surface from both within and outside grid (mantaflow phi grid) */
if (data->distances_map) {
update_mesh_distances(
index, data->distances_map, data->tree, ray_start, data->scs->surface_distance);
/* Ensure that num objects are also counted inside object. But dont count twice (see object inc for nearest point) */
if (data->distances_map[index] < 0 && !hasIncObj) {
data->num_objects[index]++;
}
}
}
}
}
static void obstacles_from_mesh(Object *coll_ob,
MantaDomainSettings *mds,
MantaCollSettings *scs,
float *distances_map,
float *velocityX,
float *velocityY,
float *velocityZ,
int *num_objects,
float dt)
{
if (!scs->mesh) {
return;
}
{
Mesh *me = NULL;
MVert *mvert = NULL;
const MLoopTri *looptri;
const MLoop *mloop;
BVHTreeFromMesh treeData = {NULL};
int numverts, i;
float *vert_vel = NULL;
bool has_velocity = false;
me = BKE_mesh_copy_for_eval(scs->mesh, true);
/* Duplicate vertices to modify. */
if (me->mvert) {
me->mvert = MEM_dupallocN(me->mvert);
CustomData_set_layer(&me->vdata, CD_MVERT, me->mvert);
}
BKE_mesh_ensure_normals(me);
mvert = me->mvert;
mloop = me->mloop;
looptri = BKE_mesh_runtime_looptri_ensure(me);
numverts = me->totvert;
/* TODO (sebbas):
* Make vert_vel init optional?
* code is in trouble if the object moves but is declared as "does not move" */
{
vert_vel = MEM_callocN(sizeof(float) * numverts * 3, "manta_obs_velocity");
if (scs->numverts != numverts || !scs->verts_old) {
if (scs->verts_old) {
MEM_freeN(scs->verts_old);
}
scs->verts_old = MEM_callocN(sizeof(float) * numverts * 3, "manta_obs_verts_old");
scs->numverts = numverts;
}
else {
has_velocity = true;
}
}
/* Transform collider vertices to
* domain grid space for fast lookups */
for (i = 0; i < numverts; i++) {
float n[3];
float co[3];
/* vert pos */
mul_m4_v3(coll_ob->obmat, mvert[i].co);
manta_pos_to_cell(mds, mvert[i].co);
/* vert normal */
normal_short_to_float_v3(n, mvert[i].no);
mul_mat3_m4_v3(coll_ob->obmat, n);
mul_mat3_m4_v3(mds->imat, n);
normalize_v3(n);
normal_float_to_short_v3(mvert[i].no, n);
/* vert velocity */
add_v3fl_v3fl_v3i(co, mvert[i].co, mds->shift);
if (has_velocity) {
sub_v3_v3v3(&vert_vel[i * 3], co, &scs->verts_old[i * 3]);
mul_v3_fl(&vert_vel[i * 3], mds->dx / dt);
}
copy_v3_v3(&scs->verts_old[i * 3], co);
}
if (BKE_bvhtree_from_mesh_get(&treeData, me, BVHTREE_FROM_LOOPTRI, 4)) {
ObstaclesFromDMData data = {.mds = mds,
.scs = scs,
.mvert = mvert,
.mloop = mloop,
.looptri = looptri,
.tree = &treeData,
.has_velocity = has_velocity,
.vert_vel = vert_vel,
.velocityX = velocityX,
.velocityY = velocityY,
.velocityZ = velocityZ,
.num_objects = num_objects,
.distances_map = distances_map};
TaskParallelSettings settings;
BLI_parallel_range_settings_defaults(&settings);
settings.scheduling_mode = TASK_SCHEDULING_DYNAMIC;
BLI_task_parallel_range(
mds->res_min[2], mds->res_max[2], &data, obstacles_from_mesh_task_cb, &settings);
}
/* free bvh tree */
free_bvhtree_from_mesh(&treeData);
BKE_id_free(NULL, me);
if (vert_vel) {
MEM_freeN(vert_vel);
}
if (me->mvert) {
MEM_freeN(me->mvert);
}
}
}
static void update_obstacleflags(MantaDomainSettings *mds, Object **collobjs, int numcollobj)
{
int active_fields = mds->active_fields;
unsigned int collIndex;
/* Monitor active fields based on flow settings */
for (collIndex = 0; collIndex < numcollobj; collIndex++) {
Object *collob = collobjs[collIndex];
MantaModifierData *mmd2 = (MantaModifierData *)modifiers_findByType(collob,
eModifierType_Manta);
if ((mmd2->type & MOD_MANTA_TYPE_EFFEC) && mmd2->effec) {
MantaCollSettings *scs = mmd2->effec;
if (!scs) {
break;
}
if (scs->type == FLUID_EFFECTOR_TYPE_COLLISION) {
active_fields |= FLUID_DOMAIN_ACTIVE_OBSTACLE;
}
if (scs->type == FLUID_EFFECTOR_TYPE_GUIDE) {
active_fields |= FLUID_DOMAIN_ACTIVE_GUIDING;
}
}
}
/* Finally, initialize new data fields if any */
if (active_fields & FLUID_DOMAIN_ACTIVE_OBSTACLE) {
manta_ensure_obstacle(mds->fluid, mds->mmd);
}
if (active_fields & FLUID_DOMAIN_ACTIVE_GUIDING) {
manta_ensure_guiding(mds->fluid, mds->mmd);
}
mds->active_fields = active_fields;
}
/* Animated obstacles: dx_step = ((x_new - x_old) / totalsteps) * substep */
static void update_obstacles(Depsgraph *depsgraph,
Scene *scene,
Object *ob,
MantaDomainSettings *mds,
float time_per_frame,
float frame_length,
int frame,
float dt)
{
Object **collobjs = NULL;
unsigned int numcollobj = 0, collIndex = 0;
collobjs = BKE_collision_objects_create(
depsgraph, ob, mds->coll_group, &numcollobj, eModifierType_Manta);
/* Update all flow related flags and ensure that corresponding grids get initialized */
update_obstacleflags(mds, collobjs, numcollobj);
float *velx = manta_get_ob_velocity_x(mds->fluid);
float *vely = manta_get_ob_velocity_y(mds->fluid);
float *velz = manta_get_ob_velocity_z(mds->fluid);
float *velxGuide = manta_get_guide_velocity_x(mds->fluid);
float *velyGuide = manta_get_guide_velocity_y(mds->fluid);
float *velzGuide = manta_get_guide_velocity_z(mds->fluid);
float *velxOrig = manta_get_velocity_x(mds->fluid);
float *velyOrig = manta_get_velocity_y(mds->fluid);
float *velzOrig = manta_get_velocity_z(mds->fluid);
float *density = manta_smoke_get_density(mds->fluid);
float *fuel = manta_smoke_get_fuel(mds->fluid);
float *flame = manta_smoke_get_flame(mds->fluid);
float *r = manta_smoke_get_color_r(mds->fluid);
float *g = manta_smoke_get_color_g(mds->fluid);
float *b = manta_smoke_get_color_b(mds->fluid);
float *phiObsIn = manta_get_phiobs_in(mds->fluid);
float *phiGuideIn = manta_get_phiguide_in(mds->fluid);
int *obstacles = manta_smoke_get_obstacle(mds->fluid);
int *num_obstacles = manta_get_num_obstacle(mds->fluid);
int *num_guides = manta_get_num_guide(mds->fluid);
unsigned int z;
/* Grid reset before writing again */
for (z = 0; z < mds->res[0] * mds->res[1] * mds->res[2]; z++) {
if (phiObsIn) {
phiObsIn[z] = 9999;
}
if (phiGuideIn) {
phiGuideIn[z] = 9999;
}
if (num_obstacles) {
num_obstacles[z] = 0;
}
if (num_guides) {
num_guides[z] = 0;
}
if (velx && vely && velz) {
velx[z] = 0.0f;
vely[z] = 0.0f;
velz[z] = 0.0f;
}
if (velxGuide && velyGuide && velzGuide) {
velxGuide[z] = 0.0f;
velyGuide[z] = 0.0f;
velzGuide[z] = 0.0f;
}
}
/* Prepare grids from effector objects */
for (collIndex = 0; collIndex < numcollobj; collIndex++) {
Object *collob = collobjs[collIndex];
MantaModifierData *mmd2 = (MantaModifierData *)modifiers_findByType(collob,
eModifierType_Manta);
// DG TODO: check if modifier is active?
if ((mmd2->type & MOD_MANTA_TYPE_EFFEC) && mmd2->effec) {
MantaCollSettings *scs = mmd2->effec;
/* Length of one frame. If using adaptive stepping, length is smaller than actual frame length */
float adaptframe_length = time_per_frame / frame_length;
/* Handle adaptive subframe (ie has subframe fraction). Need to set according scene subframe parameter */
if (time_per_frame < frame_length) {
scene->r.subframe = adaptframe_length;
scene->r.cfra = frame - 1;
}
/* Handle absolute endframe (ie no subframe fraction). Need to set the scene subframe parameter to 0 and advance current scene frame */
else {
scene->r.subframe = 0.0f;
scene->r.cfra = frame;
}
//printf("effector: frame: %d // scene current frame: %d // scene current subframe: %f\n", frame, scene->r.cfra, scene->r.subframe);
/* TODO (sebbas): Using BKE_scene_frame_get(scene) instead of new DEG_get_ctime(depsgraph) as subframes dont work with the latter yet */
BKE_object_modifier_update_subframe(
depsgraph, scene, collob, true, 5, BKE_scene_frame_get(scene), eModifierType_Manta);
if (scs && (scs->type == FLUID_EFFECTOR_TYPE_COLLISION)) {
obstacles_from_mesh(collob, mds, scs, phiObsIn, velx, vely, velz, num_obstacles, dt);
}
if (scs && (scs->type == FLUID_EFFECTOR_TYPE_GUIDE)) {
obstacles_from_mesh(
collob, mds, scs, phiGuideIn, velxGuide, velyGuide, velzGuide, num_guides, dt);
}
}
}
BKE_collision_objects_free(collobjs);
/* obstacle cells should not contain any velocity from the smoke simulation */
for (z = 0; z < mds->res[0] * mds->res[1] * mds->res[2]; z++) {
if (obstacles[z] & 2) // mantaflow convention: FlagObstacle
{
if (velxOrig && velyOrig && velzOrig) {
velxOrig[z] = 0;
velyOrig[z] = 0;
velzOrig[z] = 0;
}
if (density) {
density[z] = 0;
}
if (fuel) {
fuel[z] = 0;
flame[z] = 0;
}
if (r) {
r[z] = 0;
g[z] = 0;
b[z] = 0;
}
}
/* average velocities from multiple obstacles in one cell */
if (num_obstacles && num_obstacles[z]) {
velx[z] /= num_obstacles[z];
vely[z] /= num_obstacles[z];
velz[z] /= num_obstacles[z];
}
/* average velocities from multiple guides in one cell */
if (num_guides && num_guides[z]) {
velxGuide[z] /= num_guides[z];
velyGuide[z] /= num_guides[z];
velzGuide[z] /= num_guides[z];
}
}
}
/**********************************************************
* Flow emission code
**********************************************************/
typedef struct EmissionMap {
float *influence;
float *influence_high;
float *velocity;
float *distances;
float *distances_high;
int min[3], max[3], res[3];
int hmin[3], hmax[3], hres[3];
int total_cells, valid;
} EmissionMap;
static void em_boundInsert(EmissionMap *em, float point[3])
{
int i = 0;
if (!em->valid) {
for (; i < 3; i++) {
em->min[i] = (int)floor(point[i]);
em->max[i] = (int)ceil(point[i]);
}
em->valid = 1;
}
else {
for (; i < 3; i++) {
if (point[i] < em->min[i]) {
em->min[i] = (int)floor(point[i]);
}
if (point[i] > em->max[i]) {
em->max[i] = (int)ceil(point[i]);
}
}
}
}
static void clampBoundsInDomain(MantaDomainSettings *mds,
int min[3],
int max[3],
float *min_vel,
float *max_vel,
int margin,
float dt)
{
int i;
for (i = 0; i < 3; i++) {
int adapt = (mds->flags & FLUID_DOMAIN_USE_ADAPTIVE_DOMAIN) ? mds->adapt_res : 0;
/* add margin */
min[i] -= margin;
max[i] += margin;
/* adapt to velocity */
if (min_vel && min_vel[i] < 0.0f) {
min[i] += (int)floor(min_vel[i] * dt);
}
if (max_vel && max_vel[i] > 0.0f) {
max[i] += (int)ceil(max_vel[i] * dt);
}
/* clamp within domain max size */
CLAMP(min[i], -adapt, mds->base_res[i] + adapt);
CLAMP(max[i], -adapt, mds->base_res[i] + adapt);
}
}
static void em_allocateData(EmissionMap *em, bool use_velocity, int hires_mul)
{
int i, res[3];
for (i = 0; i < 3; i++) {
res[i] = em->max[i] - em->min[i];
if (res[i] <= 0) {
return;
}
}
em->total_cells = res[0] * res[1] * res[2];
copy_v3_v3_int(em->res, res);
em->influence = MEM_callocN(sizeof(float) * em->total_cells, "manta_flow_influence");
if (use_velocity) {
em->velocity = MEM_callocN(sizeof(float) * em->total_cells * 3, "manta_flow_velocity");
}
em->distances = MEM_callocN(sizeof(float) * em->total_cells, "fluid_flow_distances");
memset(em->distances, 0x7f7f7f7f, sizeof(float) * em->total_cells); // init to inf
/* allocate high resolution map if required */
if (hires_mul > 1) {
int total_cells_high = em->total_cells * (hires_mul * hires_mul * hires_mul);
for (i = 0; i < 3; i++) {
em->hmin[i] = em->min[i] * hires_mul;
em->hmax[i] = em->max[i] * hires_mul;
em->hres[i] = em->res[i] * hires_mul;
}
em->influence_high = MEM_callocN(sizeof(float) * total_cells_high,
"manta_flow_influence_high");
em->distances_high = MEM_callocN(sizeof(float) * total_cells_high,
"manta_flow_distances_high");
memset(em->distances_high, 0x7f7f7f7f, sizeof(float) * total_cells_high); // init to inf
}
em->valid = 1;
}
static void em_freeData(EmissionMap *em)
{
if (em->influence) {
MEM_freeN(em->influence);
}
if (em->influence_high) {
MEM_freeN(em->influence_high);
}
if (em->velocity) {
MEM_freeN(em->velocity);
}
if (em->distances) {
MEM_freeN(em->distances);
}
if (em->distances_high) {
MEM_freeN(em->distances_high);
}
}
static void em_combineMaps(
EmissionMap *output, EmissionMap *em2, int hires_multiplier, int additive, float sample_size)
{
int i, x, y, z;
/* copyfill input 1 struct and clear output for new allocation */
EmissionMap em1;
memcpy(&em1, output, sizeof(EmissionMap));
memset(output, 0, sizeof(EmissionMap));
for (i = 0; i < 3; i++) {
if (em1.valid) {
output->min[i] = MIN2(em1.min[i], em2->min[i]);
output->max[i] = MAX2(em1.max[i], em2->max[i]);
}
else {
output->min[i] = em2->min[i];
output->max[i] = em2->max[i];
}
}
/* allocate output map */
em_allocateData(output, (em1.velocity || em2->velocity), hires_multiplier);
/* base resolution inputs */
for (x = output->min[0]; x < output->max[0]; x++) {
for (y = output->min[1]; y < output->max[1]; y++) {
for (z = output->min[2]; z < output->max[2]; z++) {
int index_out = manta_get_index(x - output->min[0],
output->res[0],
y - output->min[1],
output->res[1],
z - output->min[2]);
/* initialize with first input if in range */
if (x >= em1.min[0] && x < em1.max[0] && y >= em1.min[1] && y < em1.max[1] &&
z >= em1.min[2] && z < em1.max[2]) {
int index_in = manta_get_index(
x - em1.min[0], em1.res[0], y - em1.min[1], em1.res[1], z - em1.min[2]);
/* values */
output->influence[index_out] = em1.influence[index_in];
output->distances[index_out] = em1.distances[index_in];
if (output->velocity && em1.velocity) {
copy_v3_v3(&output->velocity[index_out * 3], &em1.velocity[index_in * 3]);
}
}
/* apply second input if in range */
if (x >= em2->min[0] && x < em2->max[0] && y >= em2->min[1] && y < em2->max[1] &&
z >= em2->min[2] && z < em2->max[2]) {
int index_in = manta_get_index(
x - em2->min[0], em2->res[0], y - em2->min[1], em2->res[1], z - em2->min[2]);
/* values */
if (additive) {
output->influence[index_out] += em2->influence[index_in] * sample_size;
}
else {
output->influence[index_out] = MAX2(em2->influence[index_in],
output->influence[index_out]);
}
output->distances[index_out] = MIN2(em2->distances[index_in],
output->distances[index_out]);
sergeyUnsubmitted
Done
Inline Actions

Why not 100001?

sergey: Why not 100001?
sebbasAuthorUnsubmitted
Done
Inline Actions

Would probably also work :) It's just a sanity check that initializes grids before writing to them. Here it's 9999 to have a value that big enough but not inf.

sebbas: Would probably also work :) It's just a sanity check that initializes grids before writing to…
sergeyUnsubmitted
Done
Inline Actions

FLT_MAX then maybe?

sergey: `FLT_MAX` then maybe?
sebbasAuthorUnsubmitted
Done
Inline Actions

Yes, let's try it that way.

sebbas: Yes, let's try it that way.
if (output->velocity && em2->velocity) {
/* last sample replaces the velocity */
output->velocity[index_out * 3] = ADD_IF_LOWER(output->velocity[index_out * 3],
em2->velocity[index_in * 3]);
output->velocity[index_out * 3 + 1] = ADD_IF_LOWER(output->velocity[index_out * 3 + 1],
em2->velocity[index_in * 3 + 1]);
output->velocity[index_out * 3 + 2] = ADD_IF_LOWER(output->velocity[index_out * 3 + 2],
em2->velocity[index_in * 3 + 2]);
}
}
} // low res loop
}
}
/* initialize high resolution input if available */
if (output->influence_high) {
for (x = output->hmin[0]; x < output->hmax[0]; x++) {
for (y = output->hmin[1]; y < output->hmax[1]; y++) {
for (z = output->hmin[2]; z < output->hmax[2]; z++) {
int index_out = manta_get_index(x - output->hmin[0],
output->hres[0],
y - output->hmin[1],
output->hres[1],
z - output->hmin[2]);
/* initialize with first input if in range */
if (x >= em1.hmin[0] && x < em1.hmax[0] && y >= em1.hmin[1] && y < em1.hmax[1] &&
z >= em1.hmin[2] && z < em1.hmax[2]) {
int index_in = manta_get_index(
x - em1.hmin[0], em1.hres[0], y - em1.hmin[1], em1.hres[1], z - em1.hmin[2]);
/* values */
output->influence_high[index_out] = em1.influence_high[index_in];
}
/* apply second input if in range */
if (x >= em2->hmin[0] && x < em2->hmax[0] && y >= em2->hmin[1] && y < em2->hmax[1] &&
z >= em2->hmin[2] && z < em2->hmax[2]) {
int index_in = manta_get_index(
x - em2->hmin[0], em2->hres[0], y - em2->hmin[1], em2->hres[1], z - em2->hmin[2]);
/* values */
if (additive) {
output->influence_high[index_out] += em2->distances_high[index_in] * sample_size;
}
else {
output->distances_high[index_out] = MAX2(em2->distances_high[index_in],
output->distances_high[index_out]);
}
output->distances_high[index_out] = MIN2(em2->distances_high[index_in],
output->distances_high[index_out]);
}
} // high res loop
}
}
}
/* free original data */
em_freeData(&em1);
}
typedef struct EmitFromParticlesData {
MantaFlowSettings *sfs;
KDTree_3d *tree;
int hires_multiplier;
EmissionMap *em;
float *particle_vel;
float hr;
int *min, *max, *res;
float solid;
float smooth;
float hr_smooth;
} EmitFromParticlesData;
static void emit_from_particles_task_cb(void *__restrict userdata,
const int z,
const TaskParallelTLS *__restrict UNUSED(tls))
{
EmitFromParticlesData *data = userdata;
MantaFlowSettings *sfs = data->sfs;
EmissionMap *em = data->em;
const int hires_multiplier = data->hires_multiplier;
for (int x = data->min[0]; x < data->max[0]; x++) {
for (int y = data->min[1]; y < data->max[1]; y++) {
/* take low res samples where possible */
if (hires_multiplier <= 1 ||
!(x % hires_multiplier || y % hires_multiplier || z % hires_multiplier)) {
/* get low res space coordinates */
const int lx = x / hires_multiplier;
const int ly = y / hires_multiplier;
const int lz = z / hires_multiplier;
const int index = manta_get_index(
sergeyUnsubmitted
Done
Inline Actions

Calculate inverse once, then multiply.
Same in the code below.

sergey: Calculate inverse once, then multiply. Same in the code below.
lx - em->min[0], em->res[0], ly - em->min[1], em->res[1], lz - em->min[2]);
const float ray_start[3] = {((float)lx) + 0.5f, ((float)ly) + 0.5f, ((float)lz) + 0.5f};
/* find particle distance from the kdtree */
KDTreeNearest_3d nearest;
const float range = data->solid + data->smooth;
BLI_kdtree_3d_find_nearest(data->tree, ray_start, &nearest);
if (nearest.dist < range) {
em->influence[index] = (nearest.dist < data->solid) ?
1.0f :
(1.0f - (nearest.dist - data->solid) / data->smooth);
/* Uses particle velocity as initial velocity for smoke */
if (sfs->flags & FLUID_FLOW_INITVELOCITY &&
(sfs->psys->part->phystype != PART_PHYS_NO)) {
madd_v3_v3fl(
&em->velocity[index * 3], &data->particle_vel[nearest.index * 3], sfs->vel_multi);
}
}
}
/* take high res samples if required */
if (hires_multiplier > 1) {
/* get low res space coordinates */
const float lx = ((float)x) * data->hr;
const float ly = ((float)y) * data->hr;
const float lz = ((float)z) * data->hr;
const int index = manta_get_index(
x - data->min[0], data->res[0], y - data->min[1], data->res[1], z - data->min[2]);
const float ray_start[3] = {
lx + 0.5f * data->hr, ly + 0.5f * data->hr, lz + 0.5f * data->hr};
/* find particle distance from the kdtree */
KDTreeNearest_3d nearest;
const float range = data->solid + data->hr_smooth;
BLI_kdtree_3d_find_nearest(data->tree, ray_start, &nearest);
if (nearest.dist < range) {
em->influence_high[index] = (nearest.dist < data->solid) ?
1.0f :
(1.0f - (nearest.dist - data->solid) / data->smooth);
}
}
}
}
}
static void emit_from_particles(Object *flow_ob,
MantaDomainSettings *mds,
MantaFlowSettings *sfs,
EmissionMap *em,
Depsgraph *depsgraph,
Scene *scene,
float dt)
{
if (sfs && sfs->psys && sfs->psys->part &&
ELEM(sfs->psys->part->type, PART_EMITTER, PART_FLUID)) // is particle system selected
{
ParticleSimulationData sim;
ParticleSystem *psys = sfs->psys;
float *particle_pos;
float *particle_vel;
int totpart = psys->totpart, totchild;
int p = 0;
int valid_particles = 0;
int bounds_margin = 1;
/* radius based flow */
const float solid = sfs->particle_size * 0.5f;
const float smooth = 0.5f; /* add 0.5 cells of linear falloff to reduce aliasing */
int hires_multiplier = 1;
KDTree_3d *tree = NULL;
sim.depsgraph = depsgraph;
sim.scene = scene;
sim.ob = flow_ob;
sim.psys = psys;
sim.psys->lattice_deform_data = psys_create_lattice_deform_data(&sim);
/* prepare curvemapping tables */
if ((psys->part->child_flag & PART_CHILD_USE_CLUMP_CURVE) && psys->part->clumpcurve) {
BKE_curvemapping_changed_all(psys->part->clumpcurve);
}
if ((psys->part->child_flag & PART_CHILD_USE_ROUGH_CURVE) && psys->part->roughcurve) {
BKE_curvemapping_changed_all(psys->part->roughcurve);
}
if ((psys->part->child_flag & PART_CHILD_USE_TWIST_CURVE) && psys->part->twistcurve) {
BKE_curvemapping_changed_all(psys->part->twistcurve);
}
sergeyUnsubmitted
Done
Inline Actions

For arrays use MEM_calloc_arrayN.

sergey: For arrays use `MEM_calloc_arrayN`.
/* initialize particle cache */
if (psys->part->type == PART_HAIR) {
// TODO: PART_HAIR not supported whatsoever
totchild = 0;
}
else {
totchild = psys->totchild * psys->part->disp / 100;
}
particle_pos = MEM_callocN(sizeof(float) * (totpart + totchild) * 3, "manta_flow_particles");
particle_vel = MEM_callocN(sizeof(float) * (totpart + totchild) * 3, "manta_flow_particles");
/* setup particle radius emission if enabled */
if (sfs->flags & FLUID_FLOW_USE_PART_SIZE) {
tree = BLI_kdtree_3d_new(psys->totpart + psys->totchild);
/* check need for high resolution map */
if ((mds->flags & FLUID_DOMAIN_USE_NOISE) && (mds->highres_sampling == SM_HRES_FULLSAMPLE)) {
hires_multiplier = mds->noise_scale;
}
sergeyUnsubmitted
Done
Inline Actions

No need to calloc to then initialize, use malloc+initialize.

sergey: No need to calloc to then initialize, use malloc+initialize.
bounds_margin = (int)ceil(solid + smooth);
}
sergeyUnsubmitted
Done
Inline Actions

1 -> true.

sergey: 1 -> `true`.
/* calculate local position for each particle */
for (p = 0; p < totpart + totchild; p++) {
ParticleKey state;
float *pos;
if (p < totpart) {
if (psys->particles[p].flag & (PARS_NO_DISP | PARS_UNEXIST)) {
continue;
}
}
else {
/* handle child particle */
ChildParticle *cpa = &psys->child[p - totpart];
if (psys->particles[cpa->parent].flag & (PARS_NO_DISP | PARS_UNEXIST)) {
continue;
}
}
state.time = DEG_get_ctime(depsgraph); /* use depsgraph time */
if (psys_get_particle_state(&sim, p, &state, 0) == 0) {
continue;
}
/* location */
pos = &particle_pos[valid_particles * 3];
copy_v3_v3(pos, state.co);
manta_pos_to_cell(mds, pos);
/* velocity */
copy_v3_v3(&particle_vel[valid_particles * 3], state.vel);
mul_mat3_m4_v3(mds->imat, &particle_vel[valid_particles * 3]);
if (sfs->flags & FLUID_FLOW_USE_PART_SIZE) {
BLI_kdtree_3d_insert(tree, valid_particles, pos);
}
/* calculate emission map bounds */
em_boundInsert(em, pos);
valid_particles++;
}
/* set emission map */
clampBoundsInDomain(mds, em->min, em->max, NULL, NULL, bounds_margin, dt);
em_allocateData(em, sfs->flags & FLUID_FLOW_INITVELOCITY, hires_multiplier);
if (!(sfs->flags & FLUID_FLOW_USE_PART_SIZE)) {
for (p = 0; p < valid_particles; p++) {
int cell[3];
size_t i = 0;
size_t index = 0;
int badcell = 0;
/* 1. get corresponding cell */
cell[0] = floor(particle_pos[p * 3]) - em->min[0];
cell[1] = floor(particle_pos[p * 3 + 1]) - em->min[1];
cell[2] = floor(particle_pos[p * 3 + 2]) - em->min[2];
/* check if cell is valid (in the domain boundary) */
for (i = 0; i < 3; i++) {
if ((cell[i] > em->res[i] - 1) || (cell[i] < 0)) {
badcell = 1;
break;
}
}
if (badcell) {
continue;
}
/* get cell index */
index = manta_get_index(cell[0], em->res[0], cell[1], em->res[1], cell[2]);
/* Add influence to emission map */
em->influence[index] = 1.0f;
/* Uses particle velocity as initial velocity for smoke */
if (sfs->flags & FLUID_FLOW_INITVELOCITY && (psys->part->phystype != PART_PHYS_NO)) {
madd_v3_v3fl(&em->velocity[index * 3], &particle_vel[p * 3], sfs->vel_multi);
}
} // particles loop
}
else if (valid_particles > 0) { // FLUID_FLOW_USE_PART_SIZE
int min[3], max[3], res[3];
const float hr = 1.0f / ((float)hires_multiplier);
/* slightly adjust high res antialias smoothness based on number of divisions
* to allow smaller details but yet not differing too much from the low res size */
const float hr_smooth = smooth * powf(hr, 1.0f / 3.0f);
/* setup loop bounds */
for (int i = 0; i < 3; i++) {
min[i] = em->min[i] * hires_multiplier;
max[i] = em->max[i] * hires_multiplier;
res[i] = em->res[i] * hires_multiplier;
}
BLI_kdtree_3d_balance(tree);
EmitFromParticlesData data = {
.sfs = sfs,
.tree = tree,
.hires_multiplier = hires_multiplier,
.hr = hr,
.em = em,
.particle_vel = particle_vel,
.min = min,
.max = max,
.res = res,
.solid = solid,
.smooth = smooth,
.hr_smooth = hr_smooth,
};
TaskParallelSettings settings;
BLI_parallel_range_settings_defaults(&settings);
settings.scheduling_mode = TASK_SCHEDULING_DYNAMIC;
BLI_task_parallel_range(min[2], max[2], &data, emit_from_particles_task_cb, &settings);
}
if (sfs->flags & FLUID_FLOW_USE_PART_SIZE) {
BLI_kdtree_3d_free(tree);
}
/* free data */
if (particle_pos) {
MEM_freeN(particle_pos);
}
if (particle_vel) {
MEM_freeN(particle_vel);
}
}
}
/* Calculate map of (minimum) distances to flow/obstacle surface. Distances outside mesh are positive, inside negative */
static void update_mesh_distances(int index,
float *mesh_distances,
BVHTreeFromMesh *treeData,
const float ray_start[3],
float surface_thickness)
{
/* First pass: Raycasts in 26 directions (6 main axis + 12 quadrant diagonals (2D) + 8 octant diagonals (3D)) */
float ray_dirs[26][3] = {
{1.0f, 0.0f, 0.0f}, {0.0f, 1.0f, 0.0f}, {0.0f, 0.0f, 1.0f}, {-1.0f, 0.0f, 0.0f},
{0.0f, -1.0f, 0.0f}, {0.0f, 0.0f, -1.0f}, {1.0f, 1.0f, 0.0f}, {1.0f, -1.0f, 0.0f},
{-1.0f, 1.0f, 0.0f}, {-1.0f, -1.0f, 0.0f}, {1.0f, 0.0f, 1.0f}, {1.0f, 0.0f, -1.0f},
{-1.0f, 0.0f, 1.0f}, {-1.0f, 0.0f, -1.0f}, {0.0f, 1.0f, 1.0f}, {0.0f, 1.0f, -1.0f},
{0.0f, -1.0f, 1.0f}, {0.0f, -1.0f, -1.0f}, {1.0f, 1.0f, 1.0f}, {1.0f, -1.0f, 1.0f},
{-1.0f, 1.0f, 1.0f}, {-1.0f, -1.0f, 1.0f}, {1.0f, 1.0f, -1.0f}, {1.0f, -1.0f, -1.0f},
{-1.0f, 1.0f, -1.0f}, {-1.0f, -1.0f, -1.0f}};
size_t ray_cnt = sizeof ray_dirs / sizeof ray_dirs[0];
/* Count for ray misses (no face hit) and cases where ray direction matches face normal direction. */
int miss_cnt = 0;
int dir_cnt = 0;
for (int i = 0; i < ray_cnt; i++) {
BVHTreeRayHit hit_tree = {0};
hit_tree.index = -1;
hit_tree.dist = 9999;
normalize_v3(ray_dirs[i]);
BLI_bvhtree_ray_cast(treeData->tree,
ray_start,
ray_dirs[i],
0.0f,
&hit_tree,
treeData->raycast_callback,
treeData);
/* Ray did not hit mesh. Current point definitely not inside mesh. Inside mesh all rays have to hit. */
if (hit_tree.index == -1) {
miss_cnt++;
continue;
}
/* Ray and normal are in pointing opposite directions. */
if (dot_v3v3(ray_dirs[i], hit_tree.no) <= 0) {
dir_cnt++;
}
}
/* Initialize grid points to -0.5 inside and 0.5 outside mesh.
* Inside mesh: All rays have to hit (no misses) or all face normals have to match ray direction */
sergeyUnsubmitted
Done
Inline Actions

Multiply by inverse.

sergey: Multiply by inverse.
if (mesh_distances[index] != -0.5f) {
mesh_distances[index] = (miss_cnt > 0 || dir_cnt == ray_cnt) ? 0.5f : -0.5f;
}
/* Second pass: Ensure that single planes get initialized. */
BVHTreeNearest nearest = {0};
nearest.index = -1;
nearest.dist_sq = surface_thickness * surface_thickness; /* find_nearest uses squared distance */
if (BLI_bvhtree_find_nearest(
treeData->tree, ray_start, &nearest, treeData->nearest_callback, treeData) != -1) {
if (mesh_distances[index] != -0.5f) {
mesh_distances[index] = -0.5f;
}
}
}
static void sample_mesh(MantaFlowSettings *sfs,
const MVert *mvert,
const MLoop *mloop,
const MLoopTri *mlooptri,
const MLoopUV *mloopuv,
float *influence_map,
float *velocity_map,
int index,
const int base_res[3],
float flow_center[3],
BVHTreeFromMesh *treeData,
const float ray_start[3],
const float *vert_vel,
bool has_velocity,
int defgrp_index,
MDeformVert *dvert,
float x,
float y,
float z)
{
float ray_dir[3] = {1.0f, 0.0f, 0.0f};
BVHTreeRayHit hit = {0};
BVHTreeNearest nearest = {0};
float volume_factor = 0.0f;
float sample_str = 0.0f;
hit.index = -1;
hit.dist = 9999;
nearest.index = -1;
nearest.dist_sq = sfs->surface_distance *
sfs->surface_distance; /* find_nearest uses squared distance */
/* Check volume collision */
if (sfs->volume_density) {
if (BLI_bvhtree_ray_cast(treeData->tree,
ray_start,
ray_dir,
0.0f,
&hit,
treeData->raycast_callback,
treeData) != -1) {
float dot = ray_dir[0] * hit.no[0] + ray_dir[1] * hit.no[1] + ray_dir[2] * hit.no[2];
/* If ray and hit face normal are facing same direction
* hit point is inside a closed mesh. */
if (dot >= 0) {
/* Also cast a ray in opposite direction to make sure
* point is at least surrounded by two faces */
negate_v3(ray_dir);
hit.index = -1;
hit.dist = 9999;
BLI_bvhtree_ray_cast(
treeData->tree, ray_start, ray_dir, 0.0f, &hit, treeData->raycast_callback, treeData);
if (hit.index != -1) {
volume_factor = sfs->volume_density;
}
}
}
}
/* find the nearest point on the mesh */
if (BLI_bvhtree_find_nearest(
treeData->tree, ray_start, &nearest, treeData->nearest_callback, treeData) != -1) {
float weights[3];
int v1, v2, v3, f_index = nearest.index;
float n1[3], n2[3], n3[3], hit_normal[3];
/* emit from surface based on distance */
if (sfs->surface_distance) {
sample_str = sqrtf(nearest.dist_sq) / sfs->surface_distance;
CLAMP(sample_str, 0.0f, 1.0f);
sample_str = pow(1.0f - sample_str, 0.5f);
}
else {
sample_str = 0.0f;
}
/* calculate barycentric weights for nearest point */
v1 = mloop[mlooptri[f_index].tri[0]].v;
v2 = mloop[mlooptri[f_index].tri[1]].v;
v3 = mloop[mlooptri[f_index].tri[2]].v;
interp_weights_tri_v3(weights, mvert[v1].co, mvert[v2].co, mvert[v3].co, nearest.co);
if (sfs->flags & FLUID_FLOW_INITVELOCITY && velocity_map) {
/* apply normal directional velocity */
if (sfs->vel_normal) {
/* interpolate vertex normal vectors to get nearest point normal */
normal_short_to_float_v3(n1, mvert[v1].no);
normal_short_to_float_v3(n2, mvert[v2].no);
normal_short_to_float_v3(n3, mvert[v3].no);
interp_v3_v3v3v3(hit_normal, n1, n2, n3, weights);
normalize_v3(hit_normal);
/* apply normal directional and random velocity
* - TODO: random disabled for now since it doesn't really work well
* as pressure calc smoothens it out. */
velocity_map[index * 3] += hit_normal[0] * sfs->vel_normal * 0.25f;
velocity_map[index * 3 + 1] += hit_normal[1] * sfs->vel_normal * 0.25f;
velocity_map[index * 3 + 2] += hit_normal[2] * sfs->vel_normal * 0.25f;
/* TODO: for fire emitted from mesh surface we can use
* Vf = Vs + (Ps/Pf - 1)*S to model gaseous expansion from solid to fuel */
}
/* apply object velocity */
if (has_velocity && sfs->vel_multi) {
float hit_vel[3];
interp_v3_v3v3v3(
hit_vel, &vert_vel[v1 * 3], &vert_vel[v2 * 3], &vert_vel[v3 * 3], weights);
velocity_map[index * 3] += hit_vel[0] * sfs->vel_multi;
velocity_map[index * 3 + 1] += hit_vel[1] * sfs->vel_multi;
velocity_map[index * 3 + 2] += hit_vel[2] * sfs->vel_multi;
//printf("adding flow object vel: [%f, %f, %f]\n", hit_vel[0], hit_vel[1], hit_vel[2]);
}
velocity_map[index * 3] += sfs->vel_coord[0];
velocity_map[index * 3 + 1] += sfs->vel_coord[1];
velocity_map[index * 3 + 2] += sfs->vel_coord[2];
}
/* apply vertex group influence if used */
if (defgrp_index != -1 && dvert) {
float weight_mask = defvert_find_weight(&dvert[v1], defgrp_index) * weights[0] +
defvert_find_weight(&dvert[v2], defgrp_index) * weights[1] +
defvert_find_weight(&dvert[v3], defgrp_index) * weights[2];
sample_str *= weight_mask;
}
/* apply emission texture */
if ((sfs->flags & FLUID_FLOW_TEXTUREEMIT) && sfs->noise_texture) {
float tex_co[3] = {0};
TexResult texres;
if (sfs->texture_type == FLUID_FLOW_TEXTURE_MAP_AUTO) {
tex_co[0] = ((x - flow_center[0]) / base_res[0]) / sfs->texture_size;
tex_co[1] = ((y - flow_center[1]) / base_res[1]) / sfs->texture_size;
tex_co[2] = ((z - flow_center[2]) / base_res[2] - sfs->texture_offset) / sfs->texture_size;
}
else if (mloopuv) {
const float *uv[3];
uv[0] = mloopuv[mlooptri[f_index].tri[0]].uv;
uv[1] = mloopuv[mlooptri[f_index].tri[1]].uv;
uv[2] = mloopuv[mlooptri[f_index].tri[2]].uv;
interp_v2_v2v2v2(tex_co, UNPACK3(uv), weights);
/* map between -1.0f and 1.0f */
tex_co[0] = tex_co[0] * 2.0f - 1.0f;
tex_co[1] = tex_co[1] * 2.0f - 1.0f;
tex_co[2] = sfs->texture_offset;
}
texres.nor = NULL;
BKE_texture_get_value(NULL, sfs->noise_texture, tex_co, &texres, false);
sample_str *= texres.tin;
}
}
/* multiply initial velocity by emitter influence */
if (sfs->flags & FLUID_FLOW_INITVELOCITY && velocity_map) {
mul_v3_fl(&velocity_map[index * 3], sample_str);
}
/* apply final influence based on volume factor */
influence_map[index] = MAX2(volume_factor, sample_str);
}
typedef struct EmitFromDMData {
MantaDomainSettings *mds;
MantaFlowSettings *sfs;
const MVert *mvert;
const MLoop *mloop;
const MLoopTri *mlooptri;
const MLoopUV *mloopuv;
MDeformVert *dvert;
int defgrp_index;
BVHTreeFromMesh *tree;
int hires_multiplier;
float hr;
EmissionMap *em;
bool has_velocity;
float *vert_vel;
float *flow_center;
int *min, *max, *res;
} EmitFromDMData;
static void emit_from_mesh_task_cb(void *__restrict userdata,
const int z,
const TaskParallelTLS *__restrict UNUSED(tls))
{
EmitFromDMData *data = userdata;
EmissionMap *em = data->em;
const int hires_multiplier = data->hires_multiplier;
for (int x = data->min[0]; x < data->max[0]; x++) {
for (int y = data->min[1]; y < data->max[1]; y++) {
/* take low res samples where possible */
if (hires_multiplier <= 1 ||
!(x % hires_multiplier || y % hires_multiplier || z % hires_multiplier)) {
/* get low res space coordinates */
const int lx = x / hires_multiplier;
const int ly = y / hires_multiplier;
const int lz = z / hires_multiplier;
const int index = manta_get_index(
lx - em->min[0], em->res[0], ly - em->min[1], em->res[1], lz - em->min[2]);
const float ray_start[3] = {((float)lx) + 0.5f, ((float)ly) + 0.5f, ((float)lz) + 0.5f};
/* Emission for smoke and fire. Result in em->influence. Also, calculate invels */
sample_mesh(data->sfs,
data->mvert,
data->mloop,
data->mlooptri,
data->mloopuv,
em->influence,
em->velocity,
index,
data->mds->base_res,
data->flow_center,
data->tree,
ray_start,
data->vert_vel,
data->has_velocity,
data->defgrp_index,
data->dvert,
(float)lx,
(float)ly,
(float)lz);
/* Calculate levelset from meshes. Result in em->distances */
update_mesh_distances(
index, em->distances, data->tree, ray_start, data->sfs->surface_distance);
}
/* take high res samples if required */
if (hires_multiplier > 1) {
/* get low res space coordinates */
const float lx = ((float)x) * data->hr;
const float ly = ((float)y) * data->hr;
const float lz = ((float)z) * data->hr;
const int index = manta_get_index(
x - data->min[0], data->res[0], y - data->min[1], data->res[1], z - data->min[2]);
const float ray_start[3] = {
lx + 0.5f * data->hr,
ly + 0.5f * data->hr,
lz + 0.5f * data->hr,
};
/* Emission for smoke and fire high. Result in em->influence_high */
if (data->sfs->type == FLUID_FLOW_TYPE_SMOKE || data->sfs->type == FLUID_FLOW_TYPE_FIRE ||
data->sfs->type == FLUID_FLOW_TYPE_SMOKEFIRE) {
sample_mesh(data->sfs,
data->mvert,
data->mloop,
data->mlooptri,
data->mloopuv,
em->influence_high,
NULL,
index,
data->mds->base_res,
data->flow_center,
data->tree,
ray_start,
data->vert_vel,
data->has_velocity,
data->defgrp_index,
data->dvert,
/* x,y,z needs to be always lowres */
lx,
ly,
lz);
}
}
}
}
}
static void emit_from_mesh(
Object *flow_ob, MantaDomainSettings *mds, MantaFlowSettings *sfs, EmissionMap *em, float dt)
{
if (sfs->mesh) {
Mesh *me = NULL;
MVert *mvert = NULL;
const MLoopTri *mlooptri = NULL;
const MLoop *mloop = NULL;
const MLoopUV *mloopuv = NULL;
MDeformVert *dvert = NULL;
BVHTreeFromMesh treeData = {NULL};
int numverts, i;
float *vert_vel = NULL;
bool has_velocity = false;
int defgrp_index = sfs->vgroup_density - 1;
float flow_center[3] = {0};
int min[3], max[3], res[3];
int hires_multiplier = 1;
/* copy mesh for thread safety because we modify it,
* main issue is its VertArray being modified, then replaced and freed
*/
me = BKE_mesh_copy_for_eval(sfs->mesh, true);
/* Duplicate vertices to modify. */
if (me->mvert) {
me->mvert = MEM_dupallocN(me->mvert);
CustomData_set_layer(&me->vdata, CD_MVERT, me->mvert);
}
BKE_mesh_ensure_normals(me);
mvert = me->mvert;
mloop = me->mloop;
mlooptri = BKE_mesh_runtime_looptri_ensure(me);
numverts = me->totvert;
dvert = CustomData_get_layer(&me->vdata, CD_MDEFORMVERT);
mloopuv = CustomData_get_layer_named(&me->ldata, CD_MLOOPUV, sfs->uvlayer_name);
if (sfs->flags & FLUID_FLOW_INITVELOCITY) {
vert_vel = MEM_callocN(sizeof(float) * numverts * 3, "manta_flow_velocity");
if (sfs->numverts != numverts || !sfs->verts_old) {
if (sfs->verts_old) {
MEM_freeN(sfs->verts_old);
}
sfs->verts_old = MEM_callocN(sizeof(float) * numverts * 3, "manta_flow_verts_old");
sfs->numverts = numverts;
}
else {
has_velocity = true;
}
}
/* Transform mesh vertices to
* domain grid space for fast lookups */
for (i = 0; i < numverts; i++) {
float n[3];
/* vert pos */
mul_m4_v3(flow_ob->obmat, mvert[i].co);
manta_pos_to_cell(mds, mvert[i].co);
/* vert normal */
normal_short_to_float_v3(n, mvert[i].no);
mul_mat3_m4_v3(flow_ob->obmat, n);
mul_mat3_m4_v3(mds->imat, n);
normalize_v3(n);
normal_float_to_short_v3(mvert[i].no, n);
/* vert velocity */
if (sfs->flags & FLUID_FLOW_INITVELOCITY) {
float co[3];
add_v3fl_v3fl_v3i(co, mvert[i].co, mds->shift);
if (has_velocity) {
sub_v3_v3v3(&vert_vel[i * 3], co, &sfs->verts_old[i * 3]);
mul_v3_fl(&vert_vel[i * 3], mds->dx / dt);
}
copy_v3_v3(&sfs->verts_old[i * 3], co);
}
/* calculate emission map bounds */
em_boundInsert(em, mvert[i].co);
}
mul_m4_v3(flow_ob->obmat, flow_center);
manta_pos_to_cell(mds, flow_center);
/* check need for high resolution map */
if ((mds->flags & FLUID_DOMAIN_USE_NOISE) && (mds->highres_sampling == SM_HRES_FULLSAMPLE)) {
hires_multiplier = mds->noise_scale;
}
/* set emission map */
clampBoundsInDomain(mds, em->min, em->max, NULL, NULL, (int)ceil(sfs->surface_distance), dt);
em_allocateData(em, sfs->flags & FLUID_FLOW_INITVELOCITY, hires_multiplier);
/* setup loop bounds */
for (i = 0; i < 3; i++) {
min[i] = em->min[i] * hires_multiplier;
max[i] = em->max[i] * hires_multiplier;
res[i] = em->res[i] * hires_multiplier;
}
if (BKE_bvhtree_from_mesh_get(&treeData, me, BVHTREE_FROM_LOOPTRI, 4)) {
const float hr = 1.0f / ((float)hires_multiplier);
EmitFromDMData data = {
.mds = mds,
.sfs = sfs,
.mvert = mvert,
.mloop = mloop,
.mlooptri = mlooptri,
.mloopuv = mloopuv,
.dvert = dvert,
.defgrp_index = defgrp_index,
.tree = &treeData,
.hires_multiplier = hires_multiplier,
.hr = hr,
.em = em,
.has_velocity = has_velocity,
.vert_vel = vert_vel,
.flow_center = flow_center,
.min = min,
.max = max,
.res = res,
};
TaskParallelSettings settings;
BLI_parallel_range_settings_defaults(&settings);
settings.scheduling_mode = TASK_SCHEDULING_DYNAMIC;
BLI_task_parallel_range(min[2], max[2], &data, emit_from_mesh_task_cb, &settings);
}
/* free bvh tree */
free_bvhtree_from_mesh(&treeData);
if (vert_vel) {
MEM_freeN(vert_vel);
}
if (me->mvert) {
MEM_freeN(me->mvert);
}
BKE_id_free(NULL, me);
}
}
/**********************************************************
* Smoke step
**********************************************************/
static void adaptiveDomainCopy(MantaDomainSettings *mds,
int o_res[3],
int n_res[3],
int o_min[3],
int n_min[3],
int o_max[3],
int o_shift[3],
int n_shift[3],
int isNoise)
{
int x, y, z;
struct MANTA *fluid_old = mds->fluid;
const int block_size = mds->noise_scale;
int new_shift[3] = {0};
sub_v3_v3v3_int(new_shift, n_shift, o_shift);
/* allocate new fluid data */
BKE_manta_reallocate_fluid(mds, n_res, 0);
int o_total_cells = o_res[0] * o_res[1] * o_res[2];
int n_total_cells = n_res[0] * n_res[1] * n_res[2];
/* boundary cells will be skipped when copying data */
int bwidth = mds->boundary_width;
/* copy values from old fluid to new */
if (o_total_cells > 1 && n_total_cells > 1) {
/* base smoke */
float *o_dens, *o_react, *o_flame, *o_fuel, *o_heat, *o_vx, *o_vy, *o_vz,
*o_r, *o_g, *o_b;
float *n_dens, *n_react, *n_flame, *n_fuel, *n_heat, *n_vx, *n_vy, *n_vz,
*n_r, *n_g, *n_b;
float dummy, *dummy_s;
int *dummy_p;
/* noise smoke */
int wt_res_old[3];
float *o_wt_dens, *o_wt_react, *o_wt_flame, *o_wt_fuel, *o_wt_tcu, *o_wt_tcv, *o_wt_tcw,
*o_wt_tcu2, *o_wt_tcv2, *o_wt_tcw2, *o_wt_r, *o_wt_g, *o_wt_b;
float *n_wt_dens, *n_wt_react, *n_wt_flame, *n_wt_fuel, *n_wt_tcu, *n_wt_tcv, *n_wt_tcw,
*n_wt_tcu2, *n_wt_tcv2, *n_wt_tcw2, *n_wt_r, *n_wt_g, *n_wt_b;
if (isNoise && mds->flags & FLUID_DOMAIN_USE_NOISE) {
manta_smoke_turbulence_export(fluid_old,
&o_wt_dens,
&o_wt_react,
&o_wt_flame,
&o_wt_fuel,
&o_wt_r,
&o_wt_g,
&o_wt_b,
&o_wt_tcu,
&o_wt_tcv,
&o_wt_tcw,
&o_wt_tcu2,
&o_wt_tcv2,
&o_wt_tcw2);
manta_smoke_turbulence_get_res(fluid_old, wt_res_old);
manta_smoke_turbulence_export(mds->fluid,
&n_wt_dens,
&n_wt_react,
&n_wt_flame,
&n_wt_fuel,
&n_wt_r,
&n_wt_g,
&n_wt_b,
&n_wt_tcu,
&n_wt_tcv,
&n_wt_tcw,
&n_wt_tcu2,
&n_wt_tcv2,
&n_wt_tcw2);
}
else {
manta_smoke_export(fluid_old,
&dummy,
&dummy,
&o_dens,
&o_react,
&o_flame,
&o_fuel,
&o_heat,
&o_vx,
&o_vy,
&o_vz,
&o_r,
&o_g,
&o_b,
&dummy_p,
&dummy_s);
manta_smoke_export(mds->fluid,
&dummy,
&dummy,
&n_dens,
&n_react,
&n_flame,
&n_fuel,
&n_heat,
&n_vx,
&n_vy,
&n_vz,
&n_r,
&n_g,
&n_b,
&dummy_p,
&dummy_s);
}
for (x = o_min[0]; x < o_max[0]; x++) {
for (y = o_min[1]; y < o_max[1]; y++) {
for (z = o_min[2]; z < o_max[2]; z++) {
/* old grid index */
int xo = x - o_min[0];
int yo = y - o_min[1];
int zo = z - o_min[2];
int index_old = manta_get_index(xo, o_res[0], yo, o_res[1], zo);
/* new grid index */
int xn = x - n_min[0] - new_shift[0];
int yn = y - n_min[1] - new_shift[1];
int zn = z - n_min[2] - new_shift[2];
int index_new = manta_get_index(xn, n_res[0], yn, n_res[1], zn);
/* skip if outside new domain */
if (xn < 0 || xn >= n_res[0] || yn < 0 || yn >= n_res[1] || zn < 0 || zn >= n_res[2]) {
continue;
}
/* skip if trying to copy from old boundary cell */
if (xo < bwidth || yo < bwidth || zo < bwidth ||
xo >= o_res[0]-bwidth || yo >= o_res[1]-bwidth || zo >= o_res[2]-bwidth) {
continue;
}
/* skip if trying to copy into new boundary cell */
if (xn < bwidth || yn < bwidth || zn < bwidth ||
xn >= n_res[0]-bwidth || yn >= n_res[1]-bwidth || zn >= n_res[2]-bwidth) {
continue;
}
/* copy data */
if (isNoise && mds->flags & FLUID_DOMAIN_USE_NOISE) {
int i, j, k;
/* old grid index */
int xx_o = xo * block_size;
int yy_o = yo * block_size;
int zz_o = zo * block_size;
/* new grid index */
int xx_n = xn * block_size;
int yy_n = yn * block_size;
int zz_n = zn * block_size;
/* insert old texture values into new texture grids */
n_wt_tcu[index_new] = o_wt_tcu[index_old];
n_wt_tcv[index_new] = o_wt_tcv[index_old];
n_wt_tcw[index_new] = o_wt_tcw[index_old];
n_wt_tcu2[index_new] = o_wt_tcu2[index_old];
n_wt_tcv2[index_new] = o_wt_tcv2[index_old];
n_wt_tcw2[index_new] = o_wt_tcw2[index_old];
for (i = 0; i < block_size; i++) {
for (j = 0; j < block_size; j++) {
for (k = 0; k < block_size; k++) {
int big_index_old = manta_get_index(
xx_o + i, wt_res_old[0], yy_o + j, wt_res_old[1], zz_o + k);
int big_index_new = manta_get_index(
xx_n + i, mds->res_noise[0], yy_n + j, mds->res_noise[1], zz_n + k);
/* copy data */
n_wt_dens[big_index_new] = o_wt_dens[big_index_old];
if (n_wt_flame && o_wt_flame) {
n_wt_flame[big_index_new] = o_wt_flame[big_index_old];
n_wt_fuel[big_index_new] = o_wt_fuel[big_index_old];
n_wt_react[big_index_new] = o_wt_react[big_index_old];
}
if (n_wt_r && o_wt_r) {
n_wt_r[big_index_new] = o_wt_r[big_index_old];
n_wt_g[big_index_new] = o_wt_g[big_index_old];
n_wt_b[big_index_new] = o_wt_b[big_index_old];
}
}
}
}
}
else {
n_dens[index_new] = o_dens[index_old];
/* heat */
if (n_heat && o_heat) {
n_heat[index_new] = o_heat[index_old];
}
/* fuel */
if (n_fuel && o_fuel) {
n_flame[index_new] = o_flame[index_old];
n_fuel[index_new] = o_fuel[index_old];
n_react[index_new] = o_react[index_old];
}
/* color */
if (o_r && n_r) {
n_r[index_new] = o_r[index_old];
n_g[index_new] = o_g[index_old];
n_b[index_new] = o_b[index_old];
}
n_vx[index_new] = o_vx[index_old];
n_vy[index_new] = o_vy[index_old];
n_vz[index_new] = o_vz[index_old];
}
}
}
}
}
manta_free(fluid_old);
}
static void adaptiveDomainAdjust(MantaDomainSettings *mds,
Object *ob,
EmissionMap *emaps,
unsigned int numflowobj,
float dt)
{
/* calculate domain shift for current frame */
int new_shift[3] = {0};
int total_shift[3];
float frame_shift_f[3];
float ob_loc[3] = {0};
mul_m4_v3(ob->obmat, ob_loc);
sub_v3_v3v3(frame_shift_f, ob_loc, mds->prev_loc);
copy_v3_v3(mds->prev_loc, ob_loc);
/* convert global space shift to local "cell" space */
mul_mat3_m4_v3(mds->imat, frame_shift_f);
frame_shift_f[0] = frame_shift_f[0] / mds->cell_size[0];
frame_shift_f[1] = frame_shift_f[1] / mds->cell_size[1];
frame_shift_f[2] = frame_shift_f[2] / mds->cell_size[2];
/* add to total shift */
add_v3_v3(mds->shift_f, frame_shift_f);
/* convert to integer */
total_shift[0] = (int)(floorf(mds->shift_f[0]));
total_shift[1] = (int)(floorf(mds->shift_f[1]));
total_shift[2] = (int)(floorf(mds->shift_f[2]));
int tmpShift[3];
copy_v3_v3_int(tmpShift, mds->shift);
sub_v3_v3v3_int(new_shift, total_shift, mds->shift);
copy_v3_v3_int(mds->shift, total_shift);
/* calculate new domain boundary points so that smoke doesn't slide on sub-cell movement */
mds->p0[0] = mds->dp0[0] - mds->cell_size[0] * (mds->shift_f[0] - total_shift[0] - 0.5f);
mds->p0[1] = mds->dp0[1] - mds->cell_size[1] * (mds->shift_f[1] - total_shift[1] - 0.5f);
mds->p0[2] = mds->dp0[2] - mds->cell_size[2] * (mds->shift_f[2] - total_shift[2] - 0.5f);
mds->p1[0] = mds->p0[0] + mds->cell_size[0] * mds->base_res[0];
mds->p1[1] = mds->p0[1] + mds->cell_size[1] * mds->base_res[1];
mds->p1[2] = mds->p0[2] + mds->cell_size[2] * mds->base_res[2];
/* adjust domain resolution */
const int block_size = mds->noise_scale;
int min[3] = {32767, 32767, 32767}, max[3] = {-32767, -32767, -32767}, res[3];
int total_cells = 1, res_changed = 0, shift_changed = 0;
float min_vel[3], max_vel[3];
int x, y, z;
float *density = manta_smoke_get_density(mds->fluid);
float *fuel = manta_smoke_get_fuel(mds->fluid);
float *bigdensity = manta_smoke_turbulence_get_density(mds->fluid);
float *bigfuel = manta_smoke_turbulence_get_fuel(mds->fluid);
float *vx = manta_get_velocity_x(mds->fluid);
float *vy = manta_get_velocity_y(mds->fluid);
float *vz = manta_get_velocity_z(mds->fluid);
int wt_res[3];
if (mds->flags & FLUID_DOMAIN_USE_NOISE && mds->fluid) {
manta_smoke_turbulence_get_res(mds->fluid, wt_res);
}
INIT_MINMAX(min_vel, max_vel);
/* Calculate bounds for current domain content */
for (x = mds->res_min[0]; x < mds->res_max[0]; x++) {
for (y = mds->res_min[1]; y < mds->res_max[1]; y++) {
for (z = mds->res_min[2]; z < mds->res_max[2]; z++) {
int xn = x - new_shift[0];
int yn = y - new_shift[1];
int zn = z - new_shift[2];
int index;
float max_den;
/* skip if cell already belongs to new area */
if (xn >= min[0] && xn <= max[0] && yn >= min[1] && yn <= max[1] && zn >= min[2] &&
zn <= max[2]) {
continue;
}
index = manta_get_index(x - mds->res_min[0],
mds->res[0],
y - mds->res_min[1],
mds->res[1],
z - mds->res_min[2]);
max_den = (fuel) ? MAX2(density[index], fuel[index]) : density[index];
/* check high resolution bounds if max density isnt already high enough */
if (max_den < mds->adapt_threshold && mds->flags & FLUID_DOMAIN_USE_NOISE && mds->fluid) {
int i, j, k;
/* high res grid index */
int xx = (x - mds->res_min[0]) * block_size;
int yy = (y - mds->res_min[1]) * block_size;
int zz = (z - mds->res_min[2]) * block_size;
for (i = 0; i < block_size; i++) {
for (j = 0; j < block_size; j++) {
for (k = 0; k < block_size; k++) {
int big_index = manta_get_index(xx + i, wt_res[0], yy + j, wt_res[1], zz + k);
float den = (bigfuel) ? MAX2(bigdensity[big_index], bigfuel[big_index]) :
bigdensity[big_index];
if (den > max_den) {
max_den = den;
}
}
}
}
}
/* content bounds (use shifted coordinates) */
if (max_den >= mds->adapt_threshold) {
if (min[0] > xn) {
min[0] = xn;
}
if (min[1] > yn) {
min[1] = yn;
}
if (min[2] > zn) {
min[2] = zn;
}
if (max[0] < xn) {
max[0] = xn;
}
if (max[1] < yn) {
max[1] = yn;
}
if (max[2] < zn) {
max[2] = zn;
}
}
/* velocity bounds */
if (min_vel[0] > vx[index]) {
min_vel[0] = vx[index];
}
if (min_vel[1] > vy[index]) {
min_vel[1] = vy[index];
}
if (min_vel[2] > vz[index]) {
min_vel[2] = vz[index];
}
if (max_vel[0] < vx[index]) {
max_vel[0] = vx[index];
}
if (max_vel[1] < vy[index]) {
max_vel[1] = vy[index];
}
if (max_vel[2] < vz[index]) {
max_vel[2] = vz[index];
}
}
}
}
/* also apply emission maps */
for (int i = 0; i < numflowobj; i++) {
EmissionMap *em = &emaps[i];
for (x = em->min[0]; x < em->max[0]; x++) {
for (y = em->min[1]; y < em->max[1]; y++) {
for (z = em->min[2]; z < em->max[2]; z++) {
int index = manta_get_index(
x - em->min[0], em->res[0], y - em->min[1], em->res[1], z - em->min[2]);
float max_den = em->influence[index];
/* density bounds */
if (max_den >= mds->adapt_threshold) {
if (min[0] > x) {
min[0] = x;
}
if (min[1] > y) {
min[1] = y;
}
if (min[2] > z) {
min[2] = z;
}
if (max[0] < x) {
max[0] = x;
}
if (max[1] < y) {
max[1] = y;
}
if (max[2] < z) {
max[2] = z;
}
}
}
}
}
}
/* calculate new bounds based on these values */
clampBoundsInDomain(mds, min, max, min_vel, max_vel, mds->adapt_margin + 1, dt);
for (int i = 0; i < 3; i++) {
/* calculate new resolution */
res[i] = max[i] - min[i];
total_cells *= res[i];
if (new_shift[i]) {
shift_changed = 1;
}
/* if no content set minimum dimensions */
if (res[i] <= 0) {
int j;
for (j = 0; j < 3; j++) {
min[j] = 0;
max[j] = 1;
res[j] = 1;
}
res_changed = 1;
total_cells = 1;
break;
}
if (min[i] != mds->res_min[i] || max[i] != mds->res_max[i]) {
res_changed = 1;
}
}
if (res_changed || shift_changed) {
adaptiveDomainCopy(mds, mds->res, res, mds->res_min, min, mds->res_max, tmpShift, total_shift, 0);
/* set new domain dimensions */
copy_v3_v3_int(mds->res_min, min);
copy_v3_v3_int(mds->res_max, max);
copy_v3_v3_int(mds->res, res);
mds->total_cells = total_cells;
/* Redo adapt time step in manta to refresh solver state (ie time variables) */
manta_adapt_timestep(mds->fluid);
}
/* update global size field with new bbox size */
/* volume bounds */
float minf[3], maxf[3], size[3];
madd_v3fl_v3fl_v3fl_v3i(minf, mds->p0, mds->cell_size, mds->res_min);
madd_v3fl_v3fl_v3fl_v3i(maxf, mds->p0, mds->cell_size, mds->res_max);
/* calculate domain dimensions */
sub_v3_v3v3(size, maxf, minf);
/* apply object scale */
for (int i = 0; i < 3; i++) {
size[i] = fabsf(size[i] * ob->scale[i]);
}
copy_v3_v3(mds->global_size, size);
}
BLI_INLINE void apply_outflow_fields(int index,
float distance_value,
float *density,
float *heat,
float *fuel,
float *react,
float *color_r,
float *color_g,
float *color_b,
float *phiout)
{
/* determine outflow cells - phiout used in smoke and liquids */
if (phiout) {
phiout[index] = distance_value;
}
/* set smoke outflow */
if (density) {
density[index] = 0.f;
}
if (heat) {
heat[index] = 0.f;
}
if (fuel) {
fuel[index] = 0.f;
react[index] = 0.f;
}
if (color_r) {
color_r[index] = 0.f;
color_g[index] = 0.f;
color_b[index] = 0.f;
}
}
BLI_INLINE void apply_inflow_fields(MantaFlowSettings *sfs,
float emission_value,
float distance_value,
int index,
float *density,
float *heat,
float *fuel,
float *react,
float *color_r,
float *color_g,
float *color_b,
float *phi,
float *emission)
{
/* add inflow */
if (phi) {
phi[index] = distance_value;
}
/* save emission value for manta inflow */
if (emission) {
emission[index] = emission_value;
}
/* add smoke inflow */
int absolute_flow = (sfs->flags & FLUID_FLOW_ABSOLUTE);
float dens_old = (density) ? density[index] : 0.0;
// float fuel_old = (fuel) ? fuel[index] : 0.0f; /* UNUSED */
float dens_flow = (sfs->type == FLUID_FLOW_TYPE_FIRE) ? 0.0f : emission_value * sfs->density;
float fuel_flow = (fuel) ? emission_value * sfs->fuel_amount : 0.0f;
/* add heat */
if (heat && emission_value > 0.0f) {
heat[index] = ADD_IF_LOWER(heat[index], sfs->temp);
}
/* set density and fuel - absolute mode */
if (absolute_flow) {
if (density && sfs->type != FLUID_FLOW_TYPE_FIRE) {
if (dens_flow > density[index]) {
density[index] = dens_flow;
}
}
if (fuel && sfs->type != FLUID_FLOW_TYPE_SMOKE && fuel_flow) {
if (fuel_flow > fuel[index]) {
fuel[index] = fuel_flow;
}
}
}
/* set density and fuel - additive mode */
else {
if (density && sfs->type != FLUID_FLOW_TYPE_FIRE) {
density[index] += dens_flow;
CLAMP(density[index], 0.0f, 1.0f);
}
if (fuel && sfs->type != FLUID_FLOW_TYPE_SMOKE && sfs->fuel_amount) {
fuel[index] += fuel_flow;
CLAMP(fuel[index], 0.0f, 10.0f);
}
}
/* set color */
if (color_r && dens_flow) {
float total_dens = density[index] / (dens_old + dens_flow);
color_r[index] = (color_r[index] + sfs->color[0] * dens_flow) * total_dens;
color_g[index] = (color_g[index] + sfs->color[1] * dens_flow) * total_dens;
color_b[index] = (color_b[index] + sfs->color[2] * dens_flow) * total_dens;
}
/* set fire reaction coordinate */
if (fuel && fuel[index] > FLT_EPSILON) {
/* instead of using 1.0 for all new fuel add slight falloff
* to reduce flow blockiness */
float value = 1.0f - pow2f(1.0f - emission_value);
if (value > react[index]) {
float f = fuel_flow / fuel[index];
react[index] = value * f + (1.0f - f) * react[index];
CLAMP(react[index], 0.0f, value);
}
}
}
static void update_flowsflags(MantaDomainSettings *mds, Object **flowobjs, int numflowobj)
{
int active_fields = mds->active_fields;
unsigned int flowIndex;
/* Monitor active fields based on flow settings */
for (flowIndex = 0; flowIndex < numflowobj; flowIndex++) {
Object *collob = flowobjs[flowIndex];
MantaModifierData *mmd2 = (MantaModifierData *)modifiers_findByType(collob,
eModifierType_Manta);
// Sanity check
if (!mmd2) {
continue;
}
if ((mmd2->type & MOD_MANTA_TYPE_FLOW) && mmd2->flow) {
MantaFlowSettings *sfs = mmd2->flow;
if (!sfs) {
break;
}
if (sfs->flags & FLUID_FLOW_INITVELOCITY) {
active_fields |= FLUID_DOMAIN_ACTIVE_INVEL;
}
if (sfs->behavior == FLUID_FLOW_BEHAVIOR_OUTFLOW) {
active_fields |= FLUID_DOMAIN_ACTIVE_OUTFLOW;
}
/* liquids done from here */
if (mds->type == FLUID_DOMAIN_TYPE_LIQUID) {
continue;
}
/* activate heat field if flow produces any heat */
if (sfs->temp) {
active_fields |= FLUID_DOMAIN_ACTIVE_HEAT;
}
/* activate fuel field if flow adds any fuel */
if (sfs->fuel_amount &&
(sfs->type == FLUID_FLOW_TYPE_FIRE || sfs->type == FLUID_FLOW_TYPE_SMOKEFIRE)) {
active_fields |= FLUID_DOMAIN_ACTIVE_FIRE;
}
/* activate color field if flows add smoke with varying colors */
if (sfs->density &&
(sfs->type == FLUID_FLOW_TYPE_SMOKE || sfs->type == FLUID_FLOW_TYPE_SMOKEFIRE)) {
if (!(active_fields & FLUID_DOMAIN_ACTIVE_COLOR_SET)) {
copy_v3_v3(mds->active_color, sfs->color);
active_fields |= FLUID_DOMAIN_ACTIVE_COLOR_SET;
}
else if (!equals_v3v3(mds->active_color, sfs->color)) {
copy_v3_v3(mds->active_color, sfs->color);
active_fields |= FLUID_DOMAIN_ACTIVE_COLORS;
}
}
}
}
/* Monitor active fields based on domain settings */
if (mds->type == FLUID_DOMAIN_TYPE_GAS && active_fields & FLUID_DOMAIN_ACTIVE_FIRE) {
/* heat is always needed for fire */
active_fields |= FLUID_DOMAIN_ACTIVE_HEAT;
/* also activate colors if domain smoke color differs from active color */
if (!(active_fields & FLUID_DOMAIN_ACTIVE_COLOR_SET)) {
copy_v3_v3(mds->active_color, mds->flame_smoke_color);
active_fields |= FLUID_DOMAIN_ACTIVE_COLOR_SET;
}
else if (!equals_v3v3(mds->active_color, mds->flame_smoke_color)) {
copy_v3_v3(mds->active_color, mds->flame_smoke_color);
active_fields |= FLUID_DOMAIN_ACTIVE_COLORS;
}
}
/* Finally, initialize new data fields if any */
if (active_fields & FLUID_DOMAIN_ACTIVE_INVEL) {
manta_ensure_invelocity(mds->fluid, mds->mmd);
}
if (active_fields & FLUID_DOMAIN_ACTIVE_OUTFLOW) {
manta_ensure_outflow(mds->fluid, mds->mmd);
}
if (active_fields & FLUID_DOMAIN_ACTIVE_HEAT) {
manta_smoke_ensure_heat(mds->fluid, mds->mmd);
}
if (active_fields & FLUID_DOMAIN_ACTIVE_FIRE) {
manta_smoke_ensure_fire(mds->fluid, mds->mmd);
}
if (active_fields & FLUID_DOMAIN_ACTIVE_COLORS) {
/* initialize all smoke with "active_color" */
manta_smoke_ensure_colors(mds->fluid, mds->mmd);
}
if (mds->type == FLUID_DOMAIN_TYPE_LIQUID &&
(mds->particle_type & FLUID_DOMAIN_PARTICLE_SPRAY ||
mds->particle_type & FLUID_DOMAIN_PARTICLE_FOAM ||
mds->particle_type & FLUID_DOMAIN_PARTICLE_TRACER)) {
manta_liquid_ensure_sndparts(mds->fluid, mds->mmd);
}
mds->active_fields = active_fields;
}
static void update_flowsfluids(struct Depsgraph *depsgraph,
Scene *scene,
Object *ob,
MantaDomainSettings *mds,
float time_per_frame,
float frame_length,
int frame,
float dt)
{
EmissionMap *emaps = NULL;
Object **flowobjs = NULL;
unsigned int numflowobj = 0, flowIndex = 0;
bool is_first_frame = (frame == mds->cache_frame_start);
flowobjs = BKE_collision_objects_create(
depsgraph, ob, mds->fluid_group, &numflowobj, eModifierType_Manta);
/* Update all flow related flags and ensure that corresponding grids get initialized */
update_flowsflags(mds, flowobjs, numflowobj);
/* init emission maps for each flow */
emaps = MEM_callocN(sizeof(struct EmissionMap) * numflowobj, "manta_flow_maps");
/* Prepare flow emission maps */
for (flowIndex = 0; flowIndex < numflowobj; flowIndex++) {
Object *flowobj = flowobjs[flowIndex];
MantaModifierData *mmd2 = (MantaModifierData *)modifiers_findByType(flowobj,
eModifierType_Manta);
/* Check for initialized smoke object */
if ((mmd2->type & MOD_MANTA_TYPE_FLOW) && mmd2->flow) {
MantaFlowSettings *sfs = mmd2->flow;
int subframes = sfs->subframes;
EmissionMap *em = &emaps[flowIndex];
/* Length of one adaptive frame. If using adaptive stepping, length is smaller than actual frame length */
float adaptframe_length = time_per_frame / frame_length;
/* Adaptive frame length as percentage */
CLAMP(adaptframe_length, 0.0f, 1.0f);
/* Further splitting because of emission subframe: If no subframes present, sample_size is 1 */
float sample_size = 1.0f / (float)(subframes + 1);
int hires_multiplier = 1;
/* First frame cannot have any subframes because there is (obviously) no previous frame from where subframes could come from */
if (is_first_frame) {
subframes = 0;
}
int subframe;
float subframe_dt = dt * sample_size;
/* Emission loop. When not using subframes this will loop only once. */
for (subframe = subframes; subframe >= 0; subframe--) {
/* Temporary emission map used when subframes are enabled, i.e. at least one subframe */
EmissionMap em_temp = {NULL};
/* Set scene time */
/* Handle emission subframe */
if (subframe > 0 && !is_first_frame) {
scene->r.subframe = adaptframe_length - sample_size * (float)(subframe) * (dt / frame_length);
scene->r.cfra = frame - 1;
}
/* Last frame in this loop (subframe == suframes). Can be real end frame or in between frames (adaptive frame) */
else {
/* Handle adaptive subframe (ie has subframe fraction). Need to set according scene subframe parameter */
if (time_per_frame < frame_length) {
scene->r.subframe = adaptframe_length;
scene->r.cfra = frame - 1;
}
/* Handle absolute endframe (ie no subframe fraction). Need to set the scene subframe parameter to 0 and advance current scene frame */
else {
scene->r.subframe = 0.0f;
scene->r.cfra = frame;
}
}
/* Sanity check: subframe portion must be between 0 and 1 */
CLAMP(scene->r.subframe, 0.0f, 1.0f);
//printf("flow: frame (is first: %d): %d // scene current frame: %d // scene current subframe: %f\n", is_first_frame, frame, scene->r.cfra, scene->r.subframe);
/* Emission from particles */
if (sfs->source == FLUID_FLOW_SOURCE_PARTICLES) {
/* emit_from_particles() updates timestep internally */
if (subframes) {
emit_from_particles(flowobj, mds, sfs, &em_temp, depsgraph, scene, subframe_dt);
}
else {
emit_from_particles(flowobj, mds, sfs, em, depsgraph, scene, subframe_dt);
}
if (!(sfs->flags & FLUID_FLOW_USE_PART_SIZE)) {
hires_multiplier = 1;
}
}
/* Emission from mesh */
else if (sfs->source == FLUID_FLOW_SOURCE_MESH) {
/* Update flow object frame */
// BLI_mutex_lock() called in manta_step(), so safe to update subframe here
/* TODO (sebbas): Using BKE_scene_frame_get(scene) instead of new DEG_get_ctime(depsgraph) as subframes dont work with the latter yet */
BKE_object_modifier_update_subframe(
depsgraph, scene, flowobj, true, 5, BKE_scene_frame_get(scene), eModifierType_Manta);
/* Apply flow */
if (subframes) {
emit_from_mesh(flowobj, mds, sfs, &em_temp, subframe_dt);
}
else {
emit_from_mesh(flowobj, mds, sfs, em, subframe_dt);
}
}
else {
printf("Error: unknown flow emission source\n");
}
/* If this we emitted with temp emission map in this loop (subframe emission), we combine the temp map with the original emission map */
if (subframes) {
/* Combine emission maps */
em_combineMaps(
em, &em_temp, hires_multiplier, !(sfs->flags & FLUID_FLOW_ABSOLUTE), sample_size);
em_freeData(&em_temp);
}
}
}
}
// printf("flow: frame: %d // time per frame: %f // frame length: %f // dt: %f\n", frame, time_per_frame, frame_length, dt);
/* Adjust domain size if needed. Only do this once for every frame */
if (mds->type == FLUID_DOMAIN_TYPE_GAS &&
mds->flags & FLUID_DOMAIN_USE_ADAPTIVE_DOMAIN)
{
adaptiveDomainAdjust(mds, ob, emaps, numflowobj, dt);
}
float *phi_in = manta_get_phi_in(mds->fluid);
float *phiout_in = manta_get_phiout_in(mds->fluid);
float *density = manta_smoke_get_density(mds->fluid);
float *color_r = manta_smoke_get_color_r(mds->fluid);
float *color_g = manta_smoke_get_color_g(mds->fluid);
float *color_b = manta_smoke_get_color_b(mds->fluid);
float *fuel = manta_smoke_get_fuel(mds->fluid);
float *heat = manta_smoke_get_heat(mds->fluid);
float *react = manta_smoke_get_react(mds->fluid);
float *density_in = manta_smoke_get_density_in(mds->fluid);
float *heat_in = manta_smoke_get_heat_in(mds->fluid);
float *color_r_in = manta_smoke_get_color_r_in(mds->fluid);
float *color_g_in = manta_smoke_get_color_g_in(mds->fluid);
float *color_b_in = manta_smoke_get_color_b_in(mds->fluid);
float *fuel_in = manta_smoke_get_fuel_in(mds->fluid);
float *react_in = manta_smoke_get_react_in(mds->fluid);
float *emission_in = manta_smoke_get_emission_in(mds->fluid);
float *velx_initial = manta_get_in_velocity_x(mds->fluid);
float *vely_initial = manta_get_in_velocity_y(mds->fluid);
float *velz_initial = manta_get_in_velocity_z(mds->fluid);
unsigned int z;
/* Grid reset before writing again */
for (z = 0; z < mds->res[0] * mds->res[1] * mds->res[2]; z++) {
if (phi_in) {
phi_in[z] = 9999.0f;
}
if (phiout_in) {
phiout_in[z] = 9999.0f;
}
if (density_in) {
density_in[z] = 0.0f;
}
if (heat_in) {
heat_in[z] = 0.0f;
}
if (color_r_in) {
color_r_in[z] = 0.0f;
color_g_in[z] = 0.0f;
color_b_in[z] = 0.0f;
}
if (fuel_in) {
fuel_in[z] = 0.0f;
react_in[z] = 0.0f;
}
if (emission_in) {
emission_in[z] = 0.0f;
}
if (velx_initial) {
velx_initial[z] = 0.0f;
vely_initial[z] = 0.0f;
velz_initial[z] = 0.0f;
}
}
/* Apply emission data */
for (flowIndex = 0; flowIndex < numflowobj; flowIndex++) {
Object *flowobj = flowobjs[flowIndex];
MantaModifierData *mmd2 = (MantaModifierData *)modifiers_findByType(flowobj,
eModifierType_Manta);
// check for initialized flow object
if ((mmd2->type & MOD_MANTA_TYPE_FLOW) && mmd2->flow) {
MantaFlowSettings *sfs = mmd2->flow;
EmissionMap *em = &emaps[flowIndex];
float *velocity_map = em->velocity;
float *emission_map = em->influence;
float *distance_map = em->distances;
int gx, gy, gz, ex, ey, ez, dx, dy, dz;
size_t e_index, d_index;
// loop through every emission map cell
for (gx = em->min[0]; gx < em->max[0]; gx++) {
for (gy = em->min[1]; gy < em->max[1]; gy++) {
for (gz = em->min[2]; gz < em->max[2]; gz++) {
/* get emission map index */
ex = gx - em->min[0];
ey = gy - em->min[1];
ez = gz - em->min[2];
e_index = manta_get_index(ex, em->res[0], ey, em->res[1], ez);
/* get domain index */
dx = gx - mds->res_min[0];
dy = gy - mds->res_min[1];
dz = gz - mds->res_min[2];
d_index = manta_get_index(dx, mds->res[0], dy, mds->res[1], dz);
/* make sure emission cell is inside the new domain boundary */
if (dx < 0 || dy < 0 || dz < 0 || dx >= mds->res[0] || dy >= mds->res[1] ||
dz >= mds->res[2]) {
continue;
}
/* sync inflow grids with actual simulation grids, inflow computation needs information from actual simulation */
if (emission_map[e_index] && density) {
density_in[d_index] = density[d_index];
}
if (emission_map[e_index] && heat) {
heat_in[d_index] = heat[d_index];
}
if (emission_map[e_index] && color_r) {
color_r_in[d_index] = color_r[d_index];
color_g_in[d_index] = color_g[d_index];
color_b_in[d_index] = color_b[d_index];
}
if (emission_map[e_index] && fuel) {
fuel_in[d_index] = fuel[d_index];
react_in[d_index] = react[d_index];
}
if (sfs->behavior == FLUID_FLOW_BEHAVIOR_OUTFLOW) { // outflow
apply_outflow_fields(d_index,
distance_map[e_index],
density_in,
heat_in,
fuel_in,
react_in,
color_r_in,
color_g_in,
color_b_in,
phiout_in);
}
else if (sfs->behavior == FLUID_FLOW_BEHAVIOR_GEOMETRY && mmd2->time > 2) {
apply_inflow_fields(sfs,
0.0f,
9999.0f,
d_index,
density_in,
heat_in,
fuel_in,
react_in,
color_r_in,
color_g_in,
color_b_in,
phi_in,
emission_in);
}
else if (sfs->behavior == FLUID_FLOW_BEHAVIOR_INFLOW ||
sfs->behavior == FLUID_FLOW_BEHAVIOR_GEOMETRY) { // inflow
/* only apply inflow if enabled */
if (sfs->flags & FLUID_FLOW_USE_INFLOW) {
apply_inflow_fields(sfs,
emission_map[e_index],
distance_map[e_index],
d_index,
density_in,
heat_in,
fuel_in,
react_in,
color_r_in,
color_g_in,
color_b_in,
phi_in,
emission_in);
/* initial velocity */
if (sfs->flags & FLUID_FLOW_INITVELOCITY) {
velx_initial[d_index] = velocity_map[e_index * 3];
vely_initial[d_index] = velocity_map[e_index * 3 + 1];
velz_initial[d_index] = velocity_map[e_index * 3 + 2];
}
}
}
} // low res loop
}
}
// free emission maps
em_freeData(em);
} // end emission
}
BKE_collision_objects_free(flowobjs);
if (emaps) {
MEM_freeN(emaps);
}
}
typedef struct UpdateEffectorsData {
Scene *scene;
MantaDomainSettings *mds;
ListBase *effectors;
float *density;
float *fuel;
float *force_x;
float *force_y;
float *force_z;
float *velocity_x;
float *velocity_y;
float *velocity_z;
int *flags;
float *phiObsIn;
} UpdateEffectorsData;
static void update_effectors_task_cb(void *__restrict userdata,
const int x,
const TaskParallelTLS *__restrict UNUSED(tls))
{
UpdateEffectorsData *data = userdata;
MantaDomainSettings *mds = data->mds;
for (int y = 0; y < mds->res[1]; y++) {
for (int z = 0; z < mds->res[2]; z++) {
EffectedPoint epoint;
float mag;
float voxelCenter[3] = {0, 0, 0}, vel[3] = {0, 0, 0}, retvel[3] = {0, 0, 0};
const unsigned int index = manta_get_index(x, mds->res[0], y, mds->res[1], z);
if ((data->fuel && MAX2(data->density[index], data->fuel[index]) < FLT_EPSILON) ||
(data->density && data->density[index] < FLT_EPSILON) ||
(data->phiObsIn && data->phiObsIn[index] < 0.0f) ||
data->flags[index] & 2) // mantaflow convention: 2 == FlagObstacle
{
continue;
}
/* get velocities from manta grid space and convert to blender units */
vel[0] = data->velocity_x[index];
vel[1] = data->velocity_y[index];
vel[2] = data->velocity_z[index];
mul_v3_fl(vel, mds->dx);
/* convert vel to global space */
mag = len_v3(vel);
mul_mat3_m4_v3(mds->obmat, vel);
normalize_v3(vel);
mul_v3_fl(vel, mag);
voxelCenter[0] = mds->p0[0] + mds->cell_size[0] * ((float)(x + mds->res_min[0]) + 0.5f);
voxelCenter[1] = mds->p0[1] + mds->cell_size[1] * ((float)(y + mds->res_min[1]) + 0.5f);
voxelCenter[2] = mds->p0[2] + mds->cell_size[2] * ((float)(z + mds->res_min[2]) + 0.5f);
mul_m4_v3(mds->obmat, voxelCenter);
/* do effectors */
pd_point_from_loc(data->scene, voxelCenter, vel, index, &epoint);
BKE_effectors_apply(data->effectors, NULL, mds->effector_weights, &epoint, retvel, NULL);
/* convert retvel to local space */
mag = len_v3(retvel);
mul_mat3_m4_v3(mds->imat, retvel);
normalize_v3(retvel);
mul_v3_fl(retvel, mag);
/* constrain forces to interval -1 to 1 */
data->force_x[index] = min_ff(max_ff(-1.0f, retvel[0] * 0.2f), 1.0f);
data->force_y[index] = min_ff(max_ff(-1.0f, retvel[1] * 0.2f), 1.0f);
data->force_z[index] = min_ff(max_ff(-1.0f, retvel[2] * 0.2f), 1.0f);
}
}
}
static void update_effectors(
Depsgraph *depsgraph, Scene *scene, Object *ob, MantaDomainSettings *mds, float UNUSED(dt))
{
ListBase *effectors;
/* make sure smoke flow influence is 0.0f */
mds->effector_weights->weight[PFIELD_SMOKEFLOW] = 0.0f;
effectors = BKE_effectors_create(depsgraph, ob, NULL, mds->effector_weights);
if (effectors) {
// precalculate wind forces
UpdateEffectorsData data;
data.scene = scene;
data.mds = mds;
data.effectors = effectors;
data.density = manta_smoke_get_density(mds->fluid);
data.fuel = manta_smoke_get_fuel(mds->fluid);
data.force_x = manta_get_force_x(mds->fluid);
data.force_y = manta_get_force_y(mds->fluid);
data.force_z = manta_get_force_z(mds->fluid);
data.velocity_x = manta_get_velocity_x(mds->fluid);
data.velocity_y = manta_get_velocity_y(mds->fluid);
data.velocity_z = manta_get_velocity_z(mds->fluid);
data.flags = manta_smoke_get_obstacle(mds->fluid);
data.phiObsIn = manta_get_phiobs_in(mds->fluid);
TaskParallelSettings settings;
BLI_parallel_range_settings_defaults(&settings);
settings.scheduling_mode = TASK_SCHEDULING_DYNAMIC;
BLI_task_parallel_range(0, mds->res[0], &data, update_effectors_task_cb, &settings);
}
BKE_effectors_free(effectors);
}
static Mesh *createLiquidGeometry(MantaDomainSettings *mds, Mesh *orgmesh, Object *ob)
{
Mesh *me;
MVert *mverts;
MPoly *mpolys;
MLoop *mloops;
short *normals, *no_s;
float no[3];
float min[3];
float max[3];
float size[3];
float cell_size_scaled[3];
/* assign material + flags to new dm
* if there's no faces in original dm, keep materials and flags unchanged */
MPoly *mpoly;
MPoly mp_example = {0};
mpoly = orgmesh->mpoly;
if (mpoly) {
mp_example = *mpoly;
}
/* else leave NULL'd */
const short mp_mat_nr = mp_example.mat_nr;
const char mp_flag = mp_example.flag;
int i;
int num_verts, num_normals, num_faces;
if (!mds->fluid) {
return NULL;
}
num_verts = manta_liquid_get_num_verts(mds->fluid);
num_normals = manta_liquid_get_num_normals(mds->fluid);
num_faces = manta_liquid_get_num_triangles(mds->fluid);
//printf("num_verts: %d, num_normals: %d, num_faces: %d\n", num_verts, num_normals, num_faces);
if (!num_verts || !num_faces) {
return NULL;
}
me = BKE_mesh_new_nomain(num_verts, 0, 0, num_faces * 3, num_faces);
mverts = me->mvert;
mpolys = me->mpoly;
mloops = me->mloop;
if (!me) {
return NULL;
}
// Get size (dimension) but considering scaling scaling
copy_v3_v3(cell_size_scaled, mds->cell_size);
mul_v3_v3(cell_size_scaled, ob->scale);
madd_v3fl_v3fl_v3fl_v3i(min, mds->p0, cell_size_scaled, mds->res_min);
madd_v3fl_v3fl_v3fl_v3i(max, mds->p0, cell_size_scaled, mds->res_max);
sub_v3_v3v3(size, max, min);
// Biggest dimension will be used for upscaling
float max_size = MAX3(size[0], size[1], size[2]);
// Vertices
for (i = 0; i < num_verts; i++, mverts++) {
// read raw data. is normalized cube around domain origin
mverts->co[0] = manta_liquid_get_vertex_x_at(mds->fluid, i);
mverts->co[1] = manta_liquid_get_vertex_y_at(mds->fluid, i);
mverts->co[2] = manta_liquid_get_vertex_z_at(mds->fluid, i);
// if reading raw data directly from manta, normalize now
if ((mds->cache_flag & FLUID_DOMAIN_BAKED_MESH) == 0) {
// normalize to unit cube around 0
mverts->co[0] -= ((float)mds->res[0] * mds->mesh_scale) * 0.5f;
mverts->co[1] -= ((float)mds->res[1] * mds->mesh_scale) * 0.5f;
mverts->co[2] -= ((float)mds->res[2] * mds->mesh_scale) * 0.5f;
mverts->co[0] *= mds->dx / mds->mesh_scale;
mverts->co[1] *= mds->dx / mds->mesh_scale;
mverts->co[2] *= mds->dx / mds->mesh_scale;
}
mverts->co[0] *= max_size / fabsf(ob->scale[0]);
mverts->co[1] *= max_size / fabsf(ob->scale[1]);
mverts->co[2] *= max_size / fabsf(ob->scale[2]);
//printf("mverts->co[0]: %f, mverts->co[1]: %f, mverts->co[2]: %f\n", mverts->co[0], mverts->co[1], mverts->co[2]);
}
// Normals
normals = MEM_callocN(sizeof(short) * num_normals * 3, "Fluidmesh_tmp_normals");
for (i = 0, no_s = normals; i < num_normals; no_s += 3, i++) {
no[0] = manta_liquid_get_normal_x_at(mds->fluid, i);
no[1] = manta_liquid_get_normal_y_at(mds->fluid, i);
no[2] = manta_liquid_get_normal_z_at(mds->fluid, i);
normal_float_to_short_v3(no_s, no);
//printf("no_s[0]: %d, no_s[1]: %d, no_s[2]: %d\n", no_s[0], no_s[1], no_s[2]);
}
// Triangles
for (i = 0; i < num_faces; i++, mpolys++, mloops += 3) {
/* initialize from existing face */
mpolys->mat_nr = mp_mat_nr;
mpolys->flag = mp_flag;
mpolys->loopstart = i * 3;
mpolys->totloop = 3;
mloops[0].v = manta_liquid_get_triangle_x_at(mds->fluid, i);
mloops[1].v = manta_liquid_get_triangle_y_at(mds->fluid, i);
mloops[2].v = manta_liquid_get_triangle_z_at(mds->fluid, i);
//printf("mloops[0].v: %d, mloops[1].v: %d, mloops[2].v: %d\n", mloops[0].v, mloops[1].v, mloops[2].v);
}
BKE_mesh_ensure_normals(me);
BKE_mesh_calc_edges(me, false, false);
BKE_mesh_vert_normals_apply(me, (short(*)[3])normals);
MEM_freeN(normals);
/* return early if no mesh vert velocities required */
if ((mds->flags & FLUID_DOMAIN_USE_SPEED_VECTORS) == 0) {
return me;
}
if (mds->mesh_velocities) {
MEM_freeN(mds->mesh_velocities);
}
mds->mesh_velocities = MEM_calloc_arrayN(
num_verts, sizeof(MantaVertexVelocity), "Fluidmesh_vertvelocities");
mds->totvert = num_verts;
MantaVertexVelocity *velarray = NULL;
velarray = mds->mesh_velocities;
float time_mult = 25.f * DT_DEFAULT;
for (i = 0; i < num_verts; i++, mverts++) {
velarray[i].vel[0] = manta_liquid_get_vertvel_x_at(mds->fluid, i) * (mds->dx / time_mult);
velarray[i].vel[1] = manta_liquid_get_vertvel_y_at(mds->fluid, i) * (mds->dx / time_mult);
velarray[i].vel[2] = manta_liquid_get_vertvel_z_at(mds->fluid, i) * (mds->dx / time_mult);
//printf("velarray[%d].vel[0]: %f, velarray[%d].vel[1]: %f, velarray[%d].vel[2]: %f\n", i, velarray[i].vel[0], i, velarray[i].vel[1], i, velarray[i].vel[2]);
}
return me;
}
static Mesh *createSmokeGeometry(MantaDomainSettings *mds, Mesh *orgmesh, Object *ob)
{
Mesh *result;
MVert *mverts;
MPoly *mpolys;
MLoop *mloops;
float min[3];
float max[3];
float *co;
MPoly *mp;
MLoop *ml;
int num_verts = 8;
int num_faces = 6;
int i;
float ob_loc[3] = {0};
float ob_cache_loc[3] = {0};
/* just copy existing mesh if there is no content or if the adaptive domain is not being used */
if (mds->total_cells <= 1 || (mds-> flags & FLUID_DOMAIN_USE_ADAPTIVE_DOMAIN) == 0) {
return BKE_mesh_copy_for_eval(orgmesh, false);
}
result = BKE_mesh_new_nomain(num_verts, 0, 0, num_faces * 4, num_faces);
mverts = result->mvert;
mpolys = result->mpoly;
mloops = result->mloop;
if (num_verts) {
/* volume bounds */
madd_v3fl_v3fl_v3fl_v3i(min, mds->p0, mds->cell_size, mds->res_min);
madd_v3fl_v3fl_v3fl_v3i(max, mds->p0, mds->cell_size, mds->res_max);
/* set vertices */
/* top slab */
co = mverts[0].co;
co[0] = min[0];
co[1] = min[1];
co[2] = max[2];
co = mverts[1].co;
co[0] = max[0];
co[1] = min[1];
co[2] = max[2];
co = mverts[2].co;
co[0] = max[0];
co[1] = max[1];
co[2] = max[2];
co = mverts[3].co;
co[0] = min[0];
co[1] = max[1];
co[2] = max[2];
/* bottom slab */
co = mverts[4].co;
co[0] = min[0];
co[1] = min[1];
co[2] = min[2];
co = mverts[5].co;
co[0] = max[0];
co[1] = min[1];
co[2] = min[2];
co = mverts[6].co;
co[0] = max[0];
co[1] = max[1];
co[2] = min[2];
co = mverts[7].co;
co[0] = min[0];
co[1] = max[1];
co[2] = min[2];
/* create faces */
/* top */
mp = &mpolys[0];
ml = &mloops[0 * 4];
mp->loopstart = 0 * 4;
mp->totloop = 4;
ml[0].v = 0;
ml[1].v = 1;
ml[2].v = 2;
ml[3].v = 3;
/* right */
mp = &mpolys[1];
ml = &mloops[1 * 4];
mp->loopstart = 1 * 4;
mp->totloop = 4;
ml[0].v = 2;
ml[1].v = 1;
ml[2].v = 5;
ml[3].v = 6;
/* bottom */
mp = &mpolys[2];
ml = &mloops[2 * 4];
mp->loopstart = 2 * 4;
mp->totloop = 4;
ml[0].v = 7;
ml[1].v = 6;
ml[2].v = 5;
ml[3].v = 4;
/* left */
mp = &mpolys[3];
ml = &mloops[3 * 4];
mp->loopstart = 3 * 4;
mp->totloop = 4;
ml[0].v = 0;
ml[1].v = 3;
ml[2].v = 7;
ml[3].v = 4;
/* front */
mp = &mpolys[4];
ml = &mloops[4 * 4];
mp->loopstart = 4 * 4;
mp->totloop = 4;
ml[0].v = 3;
ml[1].v = 2;
ml[2].v = 6;
ml[3].v = 7;
/* back */
mp = &mpolys[5];
ml = &mloops[5 * 4];
mp->loopstart = 5 * 4;
mp->totloop = 4;
ml[0].v = 1;
ml[1].v = 0;
ml[2].v = 4;
ml[3].v = 5;
/* calculate required shift to match domain's global position
* it was originally simulated at (if object moves without manta step) */
invert_m4_m4(ob->imat, ob->obmat);
mul_m4_v3(ob->obmat, ob_loc);
mul_m4_v3(mds->obmat, ob_cache_loc);
sub_v3_v3v3(mds->obj_shift_f, ob_cache_loc, ob_loc);
/* convert shift to local space and apply to vertices */
mul_mat3_m4_v3(ob->imat, mds->obj_shift_f);
/* apply */
for (i = 0; i < num_verts; i++) {
add_v3_v3(mverts[i].co, mds->obj_shift_f);
}
}
BKE_mesh_calc_edges(result, false, false);
result->runtime.cd_dirty_vert |= CD_MASK_NORMAL;
return result;
}
static void manta_step(Depsgraph *depsgraph,
Scene *scene,
Object *ob,
Mesh *me,
MantaModifierData *mmd,
int frame)
{
MantaDomainSettings *mds = mmd->domain;
float dt, frame_length, time_total;
float time_per_frame;
bool init_resolution = true;
/* update object state */
invert_m4_m4(mds->imat, ob->obmat);
copy_m4_m4(mds->obmat, ob->obmat);
/* gas domain might use adaptive domain */
if (mds->type == FLUID_DOMAIN_TYPE_GAS) {
init_resolution = (mds->flags & FLUID_DOMAIN_USE_ADAPTIVE_DOMAIN) != 0;
}
manta_set_domain_from_mesh(mds, ob, me, init_resolution);
/* use local variables for adaptive loop, dt can change */
frame_length = mds->frame_length;
dt = mds->dt;
time_per_frame = 0;
time_total = mds->time_total;
BLI_mutex_lock(&object_update_lock);
/* loop as long as time_per_frame (sum of sub dt's) does not exceed actual framelength */
while (time_per_frame < frame_length) {
manta_adapt_timestep(mds->fluid);
dt = manta_get_timestep(mds->fluid);
/* save adapted dt so that MANTA object can access it (important when adaptive domain creates new MANTA object) */
mds->dt = dt;
/* count for how long this while loop is running */
time_per_frame += dt;
time_total += dt;
/* Calculate inflow geometry */
update_flowsfluids(depsgraph, scene, ob, mds, time_per_frame, frame_length, frame, dt);
manta_update_variables(mds->fluid, mmd);
/* Calculate obstacle geometry */
update_obstacles(depsgraph, scene, ob, mds, time_per_frame, frame_length, frame, dt);
if (mds->total_cells > 1) {
update_effectors(
depsgraph,
scene,
ob,
mds,
dt);
manta_bake_data(mds->fluid, mmd, frame);
mds->time_per_frame = time_per_frame;
mds->time_total = time_total;
}
}
if (mds->type == FLUID_DOMAIN_TYPE_GAS) {
manta_smoke_calc_transparency(mds, DEG_get_evaluated_view_layer(depsgraph));
}
BLI_mutex_unlock(&object_update_lock);
}
static void manta_guiding(
Depsgraph *depsgraph, Scene *scene, Object *ob, MantaModifierData *mmd, int frame)
{
MantaDomainSettings *mds = mmd->domain;
float fps = scene->r.frs_sec / scene->r.frs_sec_base;
sergeyUnsubmitted
Done
Inline Actions

Can there be a little description of what topology is and whatnot?

sergey: Can there be a little description of what topology is and whatnot?
float dt = DT_DEFAULT * (25.0f / fps) * mds->time_scale;;
BLI_mutex_lock(&object_update_lock);
update_obstacles(depsgraph, scene, ob, mds, dt, dt, frame, dt);
manta_bake_guiding(mds->fluid, mmd, frame);
BLI_mutex_unlock(&object_update_lock);
}
static void mantaModifier_process(
MantaModifierData *mmd, Depsgraph *depsgraph, Scene *scene, Object *ob, Mesh *me)
{
const int scene_framenr = (int)DEG_get_ctime(depsgraph);
if ((mmd->type & MOD_MANTA_TYPE_FLOW)) {
if (scene_framenr >= mmd->time) {
mantaModifier_init(mmd, depsgraph, ob, scene, me);
}
if (mmd->flow) {
if (mmd->flow->mesh) {
BKE_id_free(NULL, mmd->flow->mesh);
}
mmd->flow->mesh = BKE_mesh_copy_for_eval(me, false);
}
if (scene_framenr > mmd->time) {
mmd->time = scene_framenr;
}
else if (scene_framenr < mmd->time) {
mmd->time = scene_framenr;
mantaModifier_reset_ex(mmd, false);
}
}
else if (mmd->type & MOD_MANTA_TYPE_EFFEC) {
if (scene_framenr >= mmd->time) {
mantaModifier_init(mmd, depsgraph, ob, scene, me);
}
if (mmd->effec) {
if (mmd->effec->mesh) {
BKE_id_free(NULL, mmd->effec->mesh);
}
mmd->effec->mesh = BKE_mesh_copy_for_eval(me, false);
}
if (scene_framenr > mmd->time) {
mmd->time = scene_framenr;
}
else if (scene_framenr < mmd->time) {
mmd->time = scene_framenr;
mantaModifier_reset_ex(mmd, false);
}
}
else if (mmd->type & MOD_MANTA_TYPE_DOMAIN) {
MantaDomainSettings *mds = mmd->domain;
int startframe, endframe;
Object *guiding_parent = NULL;
Object **objs = NULL;
unsigned int numobj = 0;
MantaModifierData *mmd_parent = NULL;
startframe = mds->cache_frame_start;
endframe = mds->cache_frame_end;
bool is_baking = (mds->cache_flag & (FLUID_DOMAIN_BAKING_DATA | FLUID_DOMAIN_BAKING_NOISE |
FLUID_DOMAIN_BAKING_MESH | FLUID_DOMAIN_BAKING_PARTICLES |
FLUID_DOMAIN_BAKING_GUIDING));
bool is_baked = (mds->cache_flag & (FLUID_DOMAIN_BAKED_DATA | FLUID_DOMAIN_BAKED_NOISE |
FLUID_DOMAIN_BAKED_MESH | FLUID_DOMAIN_BAKED_PARTICLES |
FLUID_DOMAIN_BAKED_GUIDING));
/* Reset fluid if no fluid present (obviously)
* or if timeline gets reset to startframe when no (!) baking is running
* or if no baking is running and also there is no baked data present */
if (!mds->fluid || (scene_framenr == startframe && !is_baking) || (!is_baking && !is_baked)) {
mantaModifier_reset_ex(mmd, false);
}
mantaModifier_init(mmd, depsgraph, ob, scene, me);
/* ensure that time parameters are initialized correctly before every step */
float fps = scene->r.frs_sec / scene->r.frs_sec_base;
mds->frame_length = DT_DEFAULT * (25.0f / fps) * mds->time_scale;
mds->dt = mds->frame_length;
mds->time_per_frame = 0;
mds->time_total = (scene_framenr-1) * mds->frame_length;
/* Guiding parent res pointer needs initialization */
guiding_parent = mds->guiding_parent;
if (guiding_parent) {
mmd_parent = (MantaModifierData *)modifiers_findByType(guiding_parent, eModifierType_Manta);
if (mmd_parent->domain) {
mds->guide_res = mmd_parent->domain->res;
}
}
/* Cache does not keep track of active fields yet. So refresh them here */
objs = BKE_collision_objects_create(
depsgraph, ob, mds->fluid_group, &numobj, eModifierType_Manta);
update_flowsflags(mds, objs, numobj);
if (objs) {
MEM_freeN(objs);
}
objs = BKE_collision_objects_create(
depsgraph, ob, mds->coll_group, &numobj, eModifierType_Manta);
update_obstacleflags(mds, objs, numobj);
if (objs) {
MEM_freeN(objs);
}
/* Read cache. For liquids update data directly (i.e. not via python) */
if (!is_baking) {
if (mds->cache_flag & FLUID_DOMAIN_BAKED_DATA)
{
if (mds->type == FLUID_DOMAIN_TYPE_GAS) {
if (manta_read_config(mds->fluid, mmd, scene_framenr)) {
/* Adaptive domain might have changed resolution */
if (manta_needs_realloc(mds->fluid, mmd)) {
BKE_manta_reallocate_fluid(mds, mds->res, 1);
}
manta_read_data(mds->fluid, mmd, scene_framenr);
}
}
if (mds->type == FLUID_DOMAIN_TYPE_LIQUID) {
manta_update_liquid_structures(mds->fluid, mmd, scene_framenr);
}
}
if (mds->cache_flag & FLUID_DOMAIN_BAKED_NOISE)
{
if (mds->type == FLUID_DOMAIN_TYPE_GAS) {
if (manta_read_config(mds->fluid, mmd, scene_framenr)) {
if (manta_needs_realloc(mds->fluid, mmd)) {
BKE_manta_reallocate_fluid(mds, mds->res, 1);
}
manta_read_noise(mds->fluid, mmd, scene_framenr);
}
}
}
if (mds->cache_flag & FLUID_DOMAIN_BAKED_MESH)
{
//if (mds->type == FLUID_DOMAIN_TYPE_GAS)
// TODO (sebbas): smoke as mesh
if (mds->type == FLUID_DOMAIN_TYPE_LIQUID) {
manta_update_mesh_structures(mds->fluid, mmd, scene_framenr);
}
}
if (mds->cache_flag & FLUID_DOMAIN_BAKED_PARTICLES)
{
//if (mds->type == FLUID_DOMAIN_TYPE_GAS)
// TODO (sebbas): fire particles
if (mds->type == FLUID_DOMAIN_TYPE_LIQUID) {
manta_update_particle_structures(mds->fluid, mmd, scene_framenr);
}
}
}
/* Simulate step and write cache. Optionally also read py objects once from previous frame (bake started from resume operator) */
if (is_baking) {
/* Ensure fresh variables at every animation step */
manta_update_variables(mds->fluid, mmd);
/* Export mantaflow python script on first frame (once only) and for any bake type */
if ((mds->flags & FLUID_DOMAIN_EXPORT_MANTA_SCRIPT) &&
scene_framenr == mds->cache_frame_start)
{
if (mmd->domain && mmd->domain->type == FLUID_DOMAIN_TYPE_GAS) {
manta_smoke_export_script(mmd->domain->fluid, mmd);
}
if (mmd->domain && mmd->domain->type == FLUID_DOMAIN_TYPE_LIQUID) {
manta_liquid_export_script(mmd->domain->fluid, mmd);
}
}
if (mds->cache_flag & FLUID_DOMAIN_BAKING_DATA)
{
if (mds->flags & FLUID_DOMAIN_USE_GUIDING) {
/* Load guiding vel from flow object (only if baked) or else from domain object */
if (mds->guiding_source == FLUID_DOMAIN_GUIDING_SRC_EFFECTOR &&
mds->cache_flag & FLUID_DOMAIN_BAKED_GUIDING) {
manta_read_guiding(mds->fluid, mmd, scene_framenr, false);
}
else if (mds->guiding_source == FLUID_DOMAIN_GUIDING_SRC_DOMAIN && mmd_parent) {
manta_read_guiding(mds->fluid, mmd_parent, scene_framenr, true);
}
}
/* Refresh all objects if we start baking from a resumed frame */
sergeyUnsubmitted
Done
Inline Actions

This function should be split up.

sergey: This function should be split up.
sebbasAuthorUnsubmitted
Done
Inline Actions

Yes, I divided it a bit more. The new function mantaModifier_processDomain() is something I wouldn't make smaller though. There are many booleans that would otherwise have to be redefined in a new function or passed as arguments (big overhead).

sebbas: Yes, I divided it a bit more. The new function `mantaModifier_processDomain()` is something I…
if (mds->cache_frame_start != scene_framenr &&
mds->cache_frame_pause_data == scene_framenr) {
/* Adaptive domain might have changed resolution */
manta_read_config(mds->fluid, mmd, scene_framenr - 1);
if (manta_needs_realloc(mds->fluid, mmd)) {
BKE_manta_reallocate_fluid(mds, mds->res, 1);
}
manta_read_data(mds->fluid, mmd, scene_framenr - 1);
}
/* Base step needs separated bake and write calls as transparency calculation happens after fluid step */
manta_step(depsgraph, scene, ob, me, mmd, scene_framenr);
manta_write_config(mds->fluid, mmd, scene_framenr);
manta_write_data(mds->fluid, mmd, scene_framenr);
}
if (mds->cache_flag & FLUID_DOMAIN_BAKING_NOISE)
{
if (mds->type == FLUID_DOMAIN_TYPE_GAS) {
/* Refresh all objects if we start baking from a resumed frame */
if (mds->cache_frame_start != scene_framenr &&
mds->cache_frame_pause_noise == scene_framenr) {
/* Adaptive domain might have changed resolution */
manta_read_config(mds->fluid, mmd, scene_framenr - 1);
if (manta_needs_realloc(mds->fluid, mmd)) {
BKE_manta_reallocate_fluid(mds, mds->res, 1);
}
manta_read_data(mds->fluid, mmd, scene_framenr - 1);
manta_read_noise(mds->fluid, mmd, scene_framenr - 1);
}
if (mds->flags & FLUID_DOMAIN_USE_ADAPTIVE_DOMAIN) {
int o_res[3], o_min[3], o_max[3], o_shift[3];
copy_v3_v3_int(o_res, mds->res);
copy_v3_v3_int(o_min, mds->res_min);
copy_v3_v3_int(o_max, mds->res_max);
copy_v3_v3_int(o_shift, mds->shift);
manta_read_config(mds->fluid, mmd, scene_framenr);
if (manta_needs_realloc(mds->fluid, mmd)) {
/* Copy function also handles realloc of MANTA object */
adaptiveDomainCopy(mds, o_res, mds->res, o_min, mds->res_min, o_max, o_shift, mds->shift, 1);
}
}
manta_bake_noise(mds->fluid, mmd, scene_framenr);
}
}
if (mds->cache_flag & FLUID_DOMAIN_BAKING_MESH)
{
if (mds->type == FLUID_DOMAIN_TYPE_LIQUID) {
/* Note: Mesh bake does not need object refresh from cache */
manta_bake_mesh(mds->fluid, mmd, scene_framenr);
}
}
if (mds->cache_flag & FLUID_DOMAIN_BAKING_PARTICLES)
{
if (mds->type == FLUID_DOMAIN_TYPE_LIQUID) {
/* Refresh all objects if we start baking from a resumed frame */
if (mds->cache_frame_start != scene_framenr &&
mds->cache_frame_pause_particles == scene_framenr) {
manta_read_particles(mds->fluid, mmd, scene_framenr - 1);
}
manta_bake_particles(mds->fluid, mmd, scene_framenr);
}
}
if (mds->cache_flag & FLUID_DOMAIN_BAKING_GUIDING)
{
manta_guiding(depsgraph, scene, ob, mmd, scene_framenr);
}
}
mmd->time = scene_framenr;
}
}
struct Mesh *mantaModifier_do(
MantaModifierData *mmd, Depsgraph *depsgraph, Scene *scene, Object *ob, Mesh *me)
{
/* lock so preview render does not read smoke data while it gets modified */
if ((mmd->type & MOD_MANTA_TYPE_DOMAIN) && mmd->domain) {
BLI_rw_mutex_lock(mmd->domain->fluid_mutex, THREAD_LOCK_WRITE);
}
mantaModifier_process(mmd, depsgraph, scene, ob, me);
if ((mmd->type & MOD_MANTA_TYPE_DOMAIN) && mmd->domain) {
BLI_rw_mutex_unlock(mmd->domain->fluid_mutex);
}
/* return generated geometry for adaptive domain */
Mesh *result = NULL;
if (mmd->type & MOD_MANTA_TYPE_DOMAIN && mmd->domain)
{
if (mmd->domain->type == FLUID_DOMAIN_TYPE_LIQUID) {
result = createLiquidGeometry(mmd->domain, me, ob);
}
if (mmd->domain->type == FLUID_DOMAIN_TYPE_GAS) {
result = createSmokeGeometry(mmd->domain, me, ob);
}
}
if (!result) {
result = BKE_mesh_copy_for_eval(me, false);
}
/* XXX This is really not a nice hack, but until root of the problem is understood,
* this should be an acceptable workaround I think.
* See T58492 for details on the issue. */
result->texflag |= ME_AUTOSPACE;
return result;
}
static float calc_voxel_transp(
float *result, float *input, int res[3], int *pixel, float *tRay, float correct)
{
const size_t index = manta_get_index(pixel[0], res[0], pixel[1], res[1], pixel[2]);
// T_ray *= T_vox
*tRay *= expf(input[index] * correct);
if (result[index] < 0.0f) {
result[index] = *tRay;
}
return *tRay;
}
static void bresenham_linie_3D(int x1,
int y1,
int z1,
int x2,
int y2,
int z2,
float *tRay,
bresenham_callback cb,
float *result,
float *input,
int res[3],
float correct)
{
int dx, dy, dz, i, l, m, n, x_inc, y_inc, z_inc, err_1, err_2, dx2, dy2, dz2;
int pixel[3];
pixel[0] = x1;
pixel[1] = y1;
pixel[2] = z1;
dx = x2 - x1;
dy = y2 - y1;
dz = z2 - z1;
x_inc = (dx < 0) ? -1 : 1;
l = abs(dx);
y_inc = (dy < 0) ? -1 : 1;
m = abs(dy);
z_inc = (dz < 0) ? -1 : 1;
n = abs(dz);
dx2 = l << 1;
dy2 = m << 1;
dz2 = n << 1;
if ((l >= m) && (l >= n)) {
err_1 = dy2 - l;
err_2 = dz2 - l;
for (i = 0; i < l; i++) {
if (cb(result, input, res, pixel, tRay, correct) <= FLT_EPSILON) {
break;
}
if (err_1 > 0) {
pixel[1] += y_inc;
err_1 -= dx2;
}
if (err_2 > 0) {
pixel[2] += z_inc;
err_2 -= dx2;
}
err_1 += dy2;
err_2 += dz2;
pixel[0] += x_inc;
}
}
else if ((m >= l) && (m >= n)) {
err_1 = dx2 - m;
err_2 = dz2 - m;
for (i = 0; i < m; i++) {
if (cb(result, input, res, pixel, tRay, correct) <= FLT_EPSILON) {
break;
}
if (err_1 > 0) {
pixel[0] += x_inc;
err_1 -= dy2;
}
if (err_2 > 0) {
pixel[2] += z_inc;
err_2 -= dy2;
}
err_1 += dx2;
err_2 += dz2;
pixel[1] += y_inc;
}
}
else {
err_1 = dy2 - n;
err_2 = dx2 - n;
for (i = 0; i < n; i++) {
if (cb(result, input, res, pixel, tRay, correct) <= FLT_EPSILON) {
break;
}
if (err_1 > 0) {
pixel[1] += y_inc;
err_1 -= dz2;
}
if (err_2 > 0) {
pixel[0] += x_inc;
err_2 -= dz2;
}
err_1 += dy2;
err_2 += dx2;
pixel[2] += z_inc;
}
}
cb(result, input, res, pixel, tRay, correct);
}
static void manta_smoke_calc_transparency(MantaDomainSettings *mds, ViewLayer *view_layer)
{
float bv[6] = {0};
float light[3];
int a, z, slabsize = mds->res[0] * mds->res[1], size = mds->res[0] * mds->res[1] * mds->res[2];
float *density = manta_smoke_get_density(mds->fluid);
float *shadow = manta_smoke_get_shadow(mds->fluid);
float correct = -7.0f * mds->dx;
if (!get_light(view_layer, light)) {
return;
}
/* convert light pos to sim cell space */
mul_m4_v3(mds->imat, light);
light[0] = (light[0] - mds->p0[0]) / mds->cell_size[0] - 0.5f - (float)mds->res_min[0];
light[1] = (light[1] - mds->p0[1]) / mds->cell_size[1] - 0.5f - (float)mds->res_min[1];
light[2] = (light[2] - mds->p0[2]) / mds->cell_size[2] - 0.5f - (float)mds->res_min[2];
for (a = 0; a < size; a++) {
shadow[a] = -1.0f;
}
/* calculate domain bounds in sim cell space */
// 0,2,4 = 0.0f
bv[1] = (float)mds->res[0]; // x
bv[3] = (float)mds->res[1]; // y
bv[5] = (float)mds->res[2]; // z
for (z = 0; z < mds->res[2]; z++) {
size_t index = z * slabsize;
int x, y;
for (y = 0; y < mds->res[1]; y++) {
for (x = 0; x < mds->res[0]; x++, index++) {
float voxelCenter[3];
float pos[3];
int cell[3];
float tRay = 1.0;
if (shadow[index] >= 0.0f) {
continue;
}
voxelCenter[0] = (float)x;
voxelCenter[1] = (float)y;
voxelCenter[2] = (float)z;
// get starting cell (light pos)
if (BLI_bvhtree_bb_raycast(bv, light, voxelCenter, pos) > FLT_EPSILON) {
// we're ouside -> use point on side of domain
cell[0] = (int)floor(pos[0]);
cell[1] = (int)floor(pos[1]);
cell[2] = (int)floor(pos[2]);
}
else {
// we're inside -> use light itself
cell[0] = (int)floor(light[0]);
cell[1] = (int)floor(light[1]);
cell[2] = (int)floor(light[2]);
}
/* clamp within grid bounds */
CLAMP(cell[0], 0, mds->res[0] - 1);
CLAMP(cell[1], 0, mds->res[1] - 1);
CLAMP(cell[2], 0, mds->res[2] - 1);
bresenham_linie_3D(cell[0],
cell[1],
cell[2],
x,
y,
z,
&tRay,
calc_voxel_transp,
shadow,
density,
mds->res,
correct);
// convention -> from a RGBA float array, use G value for tRay
shadow[index] = tRay;
}
}
}
}
/* get smoke velocity and density at given coordinates
* returns fluid density or -1.0f if outside domain. */
float BKE_manta_get_velocity_at(struct Object *ob, float position[3], float velocity[3])
{
MantaModifierData *mmd = (MantaModifierData *)modifiers_findByType(ob, eModifierType_Manta);
zero_v3(velocity);
if (mmd && (mmd->type & MOD_MANTA_TYPE_DOMAIN) && mmd->domain && mmd->domain->fluid) {
MantaDomainSettings *mds = mmd->domain;
float time_mult = 25.f * DT_DEFAULT;
float vel_mag;
float *velX = manta_get_velocity_x(mds->fluid);
float *velY = manta_get_velocity_y(mds->fluid);
float *velZ = manta_get_velocity_z(mds->fluid);
float density = 0.0f, fuel = 0.0f;
float pos[3];
copy_v3_v3(pos, position);
manta_pos_to_cell(mds, pos);
/* check if point is outside domain max bounds */
if (pos[0] < mds->res_min[0] || pos[1] < mds->res_min[1] || pos[2] < mds->res_min[2]) {
return -1.0f;
}
if (pos[0] > mds->res_max[0] || pos[1] > mds->res_max[1] || pos[2] > mds->res_max[2]) {
return -1.0f;
}
/* map pos between 0.0 - 1.0 */
pos[0] = (pos[0] - mds->res_min[0]) / ((float)mds->res[0]);
pos[1] = (pos[1] - mds->res_min[1]) / ((float)mds->res[1]);
pos[2] = (pos[2] - mds->res_min[2]) / ((float)mds->res[2]);
/* check if point is outside active area */
if (mmd->domain->type == FLUID_DOMAIN_TYPE_GAS &&
mmd->domain->flags & FLUID_DOMAIN_USE_ADAPTIVE_DOMAIN)
{
if (pos[0] < 0.0f || pos[1] < 0.0f || pos[2] < 0.0f) {
return 0.0f;
}
if (pos[0] > 1.0f || pos[1] > 1.0f || pos[2] > 1.0f) {
return 0.0f;
}
}
/* get interpolated velocity */
velocity[0] = BLI_voxel_sample_trilinear(velX, mds->res, pos) * mds->global_size[0] *
time_mult;
velocity[1] = BLI_voxel_sample_trilinear(velY, mds->res, pos) * mds->global_size[1] *
time_mult;
velocity[2] = BLI_voxel_sample_trilinear(velZ, mds->res, pos) * mds->global_size[2] *
time_mult;
/* convert velocity direction to global space */
vel_mag = len_v3(velocity);
mul_mat3_m4_v3(mds->obmat, velocity);
normalize_v3(velocity);
mul_v3_fl(velocity, vel_mag);
/* use max value of fuel or smoke density */
density = BLI_voxel_sample_trilinear(manta_smoke_get_density(mds->fluid), mds->res, pos);
if (manta_smoke_has_fuel(mds->fluid)) {
fuel = BLI_voxel_sample_trilinear(manta_smoke_get_fuel(mds->fluid), mds->res, pos);
}
return MAX2(density, fuel);
}
return -1.0f;
}
int BKE_manta_get_data_flags(MantaDomainSettings *mds)
{
int flags = 0;
if (mds->fluid) {
if (manta_smoke_has_heat(mds->fluid)) {
flags |= FLUID_DOMAIN_ACTIVE_HEAT;
}
if (manta_smoke_has_fuel(mds->fluid)) {
flags |= FLUID_DOMAIN_ACTIVE_FIRE;
}
if (manta_smoke_has_colors(mds->fluid)) {
flags |= FLUID_DOMAIN_ACTIVE_COLORS;
}
}
return flags;
}