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source/blender/nodes/geometry/nodes/legacy/node_geo_raycast.cc

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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.
*/
#include "DNA_mesh_types.h"
#include "BKE_bvhutils.h"
#include "BKE_mesh_sample.hh"
#include "UI_interface.h"
#include "UI_resources.h"
#include "node_geometry_util.hh"
namespace blender::nodes {
static void geo_node_legacy_raycast_declare(NodeDeclarationBuilder &b)
{
b.add_input<decl::Geometry>("Geometry");
b.add_input<decl::Geometry>("Target Geometry");
b.add_input<decl::String>("Ray Direction");
b.add_input<decl::Vector>("Ray Direction", "Ray Direction_001")
.default_value({0.0f, 0.0f, 1.0f});
b.add_input<decl::String>("Ray Length");
b.add_input<decl::Float>("Ray Length", "Ray Length_001")
.default_value(100.0f)
.min(0.0f)
.subtype(PROP_DISTANCE);
b.add_input<decl::String>("Target Attribute");
b.add_input<decl::String>("Is Hit");
b.add_input<decl::String>("Hit Position");
b.add_input<decl::String>("Hit Normal");
b.add_input<decl::String>("Hit Distance");
b.add_input<decl::String>("Hit Attribute");
b.add_output<decl::Geometry>("Geometry");
}
static void geo_node_legacy_raycast_layout(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
{
uiLayoutSetPropSep(layout, true);
uiLayoutSetPropDecorate(layout, false);
uiItemR(layout, ptr, "mapping", 0, IFACE_("Mapping"), ICON_NONE);
uiItemR(layout, ptr, "input_type_ray_direction", 0, IFACE_("Ray Direction"), ICON_NONE);
uiItemR(layout, ptr, "input_type_ray_length", 0, IFACE_("Ray Length"), ICON_NONE);
}
static void geo_node_legacy_raycast_init(bNodeTree *UNUSED(tree), bNode *node)
{
NodeGeometryRaycast *data = (NodeGeometryRaycast *)MEM_callocN(sizeof(NodeGeometryRaycast),
__func__);
data->input_type_ray_direction = GEO_NODE_ATTRIBUTE_INPUT_VECTOR;
data->input_type_ray_length = GEO_NODE_ATTRIBUTE_INPUT_FLOAT;
node->storage = data;
}
static void geo_node_legacy_raycast_update(bNodeTree *UNUSED(ntree), bNode *node)
{
NodeGeometryRaycast *node_storage = (NodeGeometryRaycast *)node->storage;
update_attribute_input_socket_availabilities(
*node,
"Ray Direction",
(GeometryNodeAttributeInputMode)node_storage->input_type_ray_direction);
update_attribute_input_socket_availabilities(
*node, "Ray Length", (GeometryNodeAttributeInputMode)node_storage->input_type_ray_length);
}
static void raycast_to_mesh(const Mesh &mesh,
const VArray<float3> &ray_origins,
const VArray<float3> &ray_directions,
const VArray<float> &ray_lengths,
const MutableSpan<bool> r_hit,
const MutableSpan<int> r_hit_indices,
const MutableSpan<float3> r_hit_positions,
const MutableSpan<float3> r_hit_normals,
const MutableSpan<float> r_hit_distances)
{
BLI_assert(ray_origins.size() == ray_directions.size());
BLI_assert(ray_origins.size() == ray_lengths.size());
BLI_assert(ray_origins.size() == r_hit.size() || r_hit.is_empty());
BLI_assert(ray_origins.size() == r_hit_indices.size() || r_hit_indices.is_empty());
BLI_assert(ray_origins.size() == r_hit_positions.size() || r_hit_positions.is_empty());
BLI_assert(ray_origins.size() == r_hit_normals.size() || r_hit_normals.is_empty());
BLI_assert(ray_origins.size() == r_hit_distances.size() || r_hit_distances.is_empty());
BVHTreeFromMesh tree_data;
BKE_bvhtree_from_mesh_get(&tree_data, &mesh, BVHTREE_FROM_LOOPTRI, 4);
if (tree_data.tree == nullptr) {
free_bvhtree_from_mesh(&tree_data);
return;
}
for (const int i : ray_origins.index_range()) {
const float ray_length = ray_lengths[i];
const float3 ray_origin = ray_origins[i];
const float3 ray_direction = ray_directions[i].normalized();
BVHTreeRayHit hit;
hit.index = -1;
hit.dist = ray_length;
if (BLI_bvhtree_ray_cast(tree_data.tree,
ray_origin,
ray_direction,
0.0f,
&hit,
tree_data.raycast_callback,
&tree_data) != -1) {
if (!r_hit.is_empty()) {
r_hit[i] = hit.index >= 0;
}
if (!r_hit_indices.is_empty()) {
/* Index should always be a valid looptri index, use 0 when hit failed. */
r_hit_indices[i] = max_ii(hit.index, 0);
}
if (!r_hit_positions.is_empty()) {
r_hit_positions[i] = hit.co;
}
if (!r_hit_normals.is_empty()) {
r_hit_normals[i] = hit.no;
}
if (!r_hit_distances.is_empty()) {
r_hit_distances[i] = hit.dist;
}
}
else {
if (!r_hit.is_empty()) {
r_hit[i] = false;
}
if (!r_hit_indices.is_empty()) {
r_hit_indices[i] = 0;
}
if (!r_hit_positions.is_empty()) {
r_hit_positions[i] = float3(0.0f, 0.0f, 0.0f);
}
if (!r_hit_normals.is_empty()) {
r_hit_normals[i] = float3(0.0f, 0.0f, 0.0f);
}
if (!r_hit_distances.is_empty()) {
r_hit_distances[i] = ray_length;
}
}
}
free_bvhtree_from_mesh(&tree_data);
}
static bke::mesh_surface_sample::eAttributeMapMode get_map_mode(
GeometryNodeRaycastMapMode map_mode)
{
switch (map_mode) {
case GEO_NODE_RAYCAST_INTERPOLATED:
return bke::mesh_surface_sample::eAttributeMapMode::INTERPOLATED;
default:
case GEO_NODE_RAYCAST_NEAREST:
return bke::mesh_surface_sample::eAttributeMapMode::NEAREST;
}
}
static void raycast_from_points(const GeoNodeExecParams &params,
const GeometrySet &target_geometry,
GeometryComponent &dst_component,
const StringRef hit_name,
const StringRef hit_position_name,
const StringRef hit_normal_name,
const StringRef hit_distance_name,
const Span<std::string> hit_attribute_names,
const Span<std::string> hit_attribute_output_names)
{
BLI_assert(hit_attribute_names.size() == hit_attribute_output_names.size());
const MeshComponent *src_mesh_component =
target_geometry.get_component_for_read<MeshComponent>();
if (src_mesh_component == nullptr) {
return;
}
const Mesh *src_mesh = src_mesh_component->get_for_read();
if (src_mesh == nullptr) {
return;
}
if (src_mesh->totpoly == 0) {
return;
}
const NodeGeometryRaycast &storage = *(const NodeGeometryRaycast *)params.node().storage;
bke::mesh_surface_sample::eAttributeMapMode map_mode = get_map_mode(
(GeometryNodeRaycastMapMode)storage.mapping);
const AttributeDomain result_domain = ATTR_DOMAIN_POINT;
GVArray_Typed<float3> ray_origins = dst_component.attribute_get_for_read<float3>(
"position", result_domain, {0, 0, 0});
GVArray_Typed<float3> ray_directions = params.get_input_attribute<float3>(
"Ray Direction", dst_component, result_domain, {0, 0, 0});
GVArray_Typed<float> ray_lengths = params.get_input_attribute<float>(
"Ray Length", dst_component, result_domain, 0);
OutputAttribute_Typed<bool> hit_attribute =
dst_component.attribute_try_get_for_output_only<bool>(hit_name, result_domain);
OutputAttribute_Typed<float3> hit_position_attribute =
dst_component.attribute_try_get_for_output_only<float3>(hit_position_name, result_domain);
OutputAttribute_Typed<float3> hit_normal_attribute =
dst_component.attribute_try_get_for_output_only<float3>(hit_normal_name, result_domain);
OutputAttribute_Typed<float> hit_distance_attribute =
dst_component.attribute_try_get_for_output_only<float>(hit_distance_name, result_domain);
/* Positions and looptri indices are always needed for interpolation,
* so create temporary arrays if no output attribute is given. */
Array<int> hit_indices;
Array<float3> hit_positions_internal;
if (!hit_attribute_names.is_empty()) {
hit_indices.reinitialize(ray_origins->size());
if (!hit_position_attribute) {
hit_positions_internal.reinitialize(ray_origins->size());
}
}
const MutableSpan<bool> is_hit = hit_attribute ? hit_attribute.as_span() : MutableSpan<bool>();
const MutableSpan<float3> hit_positions = hit_position_attribute ?
hit_position_attribute.as_span() :
hit_positions_internal;
const MutableSpan<float3> hit_normals = hit_normal_attribute ? hit_normal_attribute.as_span() :
MutableSpan<float3>();
const MutableSpan<float> hit_distances = hit_distance_attribute ?
hit_distance_attribute.as_span() :
MutableSpan<float>();
raycast_to_mesh(*src_mesh,
ray_origins,
ray_directions,
ray_lengths,
is_hit,
hit_indices,
hit_positions,
hit_normals,
hit_distances);
hit_attribute.save();
hit_position_attribute.save();
hit_normal_attribute.save();
hit_distance_attribute.save();
/* Custom interpolated attributes */
bke::mesh_surface_sample::MeshAttributeInterpolator interp(src_mesh, hit_positions, hit_indices);
for (const int i : hit_attribute_names.index_range()) {
const std::optional<AttributeMetaData> meta_data = src_mesh_component->attribute_get_meta_data(
hit_attribute_names[i]);
if (meta_data) {
ReadAttributeLookup hit_attribute = src_mesh_component->attribute_try_get_for_read(
hit_attribute_names[i]);
OutputAttribute hit_attribute_output = dst_component.attribute_try_get_for_output_only(
hit_attribute_output_names[i], result_domain, meta_data->data_type);
interp.sample_attribute(hit_attribute, hit_attribute_output, map_mode);
hit_attribute_output.save();
}
}
}
static void geo_node_legacy_raycast_exec(GeoNodeExecParams params)
{
GeometrySet geometry_set = params.extract_input<GeometrySet>("Geometry");
GeometrySet target_geometry_set = params.extract_input<GeometrySet>("Target Geometry");
const std::string hit_name = params.extract_input<std::string>("Is Hit");
const std::string hit_position_name = params.extract_input<std::string>("Hit Position");
const std::string hit_normal_name = params.extract_input<std::string>("Hit Normal");
const std::string hit_distance_name = params.extract_input<std::string>("Hit Distance");
const Array<std::string> hit_names = {params.extract_input<std::string>("Target Attribute")};
const Array<std::string> hit_output_names = {params.extract_input<std::string>("Hit Attribute")};
geometry_set = bke::geometry_set_realize_instances(geometry_set);
target_geometry_set = bke::geometry_set_realize_instances(target_geometry_set);
static const Array<GeometryComponentType> types = {
GEO_COMPONENT_TYPE_MESH, GEO_COMPONENT_TYPE_POINT_CLOUD, GEO_COMPONENT_TYPE_CURVE};
for (const GeometryComponentType type : types) {
if (geometry_set.has(type)) {
raycast_from_points(params,
target_geometry_set,
geometry_set.get_component_for_write(type),
hit_name,
hit_position_name,
hit_normal_name,
hit_distance_name,
hit_names,
hit_output_names);
}
}
params.set_output("Geometry", geometry_set);
}
} // namespace blender::nodes
void register_node_type_geo_legacy_raycast()
{
static bNodeType ntype;
geo_node_type_base(&ntype, GEO_NODE_LEGACY_RAYCAST, "Raycast", NODE_CLASS_GEOMETRY, 0);
node_type_size_preset(&ntype, NODE_SIZE_LARGE);
node_type_init(&ntype, blender::nodes::geo_node_legacy_raycast_init);
node_type_update(&ntype, blender::nodes::geo_node_legacy_raycast_update);
node_type_storage(
&ntype, "NodeGeometryRaycast", node_free_standard_storage, node_copy_standard_storage);
ntype.declare = blender::nodes::geo_node_legacy_raycast_declare;
ntype.geometry_node_execute = blender::nodes::geo_node_legacy_raycast_exec;
ntype.draw_buttons = blender::nodes::geo_node_legacy_raycast_layout;
nodeRegisterType(&ntype);
}