Differential D2889 Diff 11473 source/blender/gpencil_modifiers/intern/MOD_gpencillattice.c

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source/blender/gpencil_modifiers/intern/MOD_gpencillattice.c

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				/*
				* *** BEGIN GPL LICENSE BLOCK ***
				*
				* 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) 2017, Blender Foundation
				* This is a new part of Blender
				*
				* Contributor(s): Antonio Vazquez
				*
				* *** END GPL LICENSE BLOCK ***
				*
				*/

				/** \file blender/modifiers/intern/MOD_gpencillattice.c
				* \ingroup modifiers
				*/

				#include <stdio.h>

				#include "DNA_meshdata_types.h"
				#include "DNA_scene_types.h"
				#include "DNA_object_types.h"
				#include "DNA_gpencil_types.h"
				#include "DNA_gpencil_modifier_types.h"

				#include "BLI_utildefines.h"

				#include "BKE_context.h"
				#include "BKE_deform.h"
				#include "BKE_gpencil.h"
				#include "BKE_gpencil_modifier.h"
				#include "BKE_modifier.h"
				#include "BKE_lattice.h"
				#include "BKE_library_query.h"
				#include "BKE_scene.h"
				#include "BKE_main.h"
				#include "BKE_layer.h"

				#include "MEM_guardedalloc.h"

				#include "MOD_gpencil_util.h"
				#include "MOD_gpencil_modifiertypes.h"

				#include "DEG_depsgraph.h"
				#include "DEG_depsgraph_build.h"
				#include "DEG_depsgraph_query.h"

				static void initData(GpencilModifierData *md)
				{
				LatticeGpencilModifierData gpmd = (LatticeGpencilModifierData )md;
				gpmd->pass_index = 0;
				gpmd->layername[0] = '\0';
				gpmd->vgname[0] = '\0';
				gpmd->object = NULL;
				gpmd->cache_data = NULL;
				gpmd->strength = 1.0f;
				}

				static void copyData(const GpencilModifierData md, GpencilModifierData target)
				{
				BKE_gpencil_modifier_copyData_generic(md, target);
				}

				static void deformStroke(
				GpencilModifierData md, Depsgraph UNUSED(depsgraph),
				Object ob, bGPDlayer gpl, bGPDstroke *gps)
				{
				LatticeGpencilModifierData mmd = (LatticeGpencilModifierData )md;
				int vindex = defgroup_name_index(ob, mmd->vgname);
				float weight = 1.0f;

				if (!is_stroke_affected_by_modifier(ob,
				mmd->layername, mmd->pass_index, 3, gpl, gps,
				mmd->flag & GP_LATTICE_INVERT_LAYER, mmd->flag & GP_LATTICE_INVERT_PASS))
				{
				return;
				}

				if (mmd->cache_data == NULL) {
				return;
				}

				for (int i = 0; i < gps->totpoints; i++) {
				bGPDspoint *pt = &gps->points[i];
				MDeformVert *dvert = &gps->dvert[i];

				/* verify vertex group */
				weight = get_modifier_point_weight(dvert, (int)(!(mmd->flag & GP_LATTICE_INVERT_VGROUP) == 0), vindex);
				if (weight < 0) {
				continue;
				}

				calc_latt_deform((struct LatticeDeformData )mmd->cache_data, &pt->x, mmd->strength weight);
				}
				}

				/* FIXME: Ideally we be doing this on a copy of the main depsgraph
				* (i.e. one where we don't have to worry about restoring state)
				*/
				static void bakeModifier(
				Main bmain, Depsgraph depsgraph,
				GpencilModifierData md, Object ob)
				{
				LatticeGpencilModifierData mmd = (LatticeGpencilModifierData )md;
				Scene *scene = DEG_get_evaluated_scene(depsgraph);
				struct LatticeDeformData *ldata = NULL;
				bGPdata *gpd = ob->data;
				int oldframe = (int)DEG_get_ctime(depsgraph);

				if (mmd->object == NULL)
				return;

				for (bGPDlayer *gpl = gpd->layers.first; gpl; gpl = gpl->next) {
				for (bGPDframe *gpf = gpl->frames.first; gpf; gpf = gpf->next) {
				/* apply lattice effects on this frame
				* NOTE: this assumes that we don't want lattice animation on non-keyframed frames
				*/
				CFRA = gpf->framenum;
				BKE_scene_graph_update_for_newframe(depsgraph, bmain);

				/* recalculate lattice data */
				BKE_gpencil_lattice_init(ob);

				/* compute lattice effects on this frame */
				for (bGPDstroke *gps = gpf->strokes.first; gps; gps = gps->next) {
				deformStroke(md, depsgraph, ob, gpl, gps);
				}
				}
				}

				/* free lingering data */
				ldata = (struct LatticeDeformData *)mmd->cache_data;
				if (ldata) {
				end_latt_deform(ldata);
				mmd->cache_data = NULL;
				}

				/* return frame state and DB to original state */
				CFRA = oldframe;
				BKE_scene_graph_update_for_newframe(depsgraph, bmain);
				}

				static void freeData(GpencilModifierData *md)
				{
				LatticeGpencilModifierData mmd = (LatticeGpencilModifierData )md;
				struct LatticeDeformData ldata = (struct LatticeDeformData )mmd->cache_data;
				/* free deform data */
				if (ldata) {
				end_latt_deform(ldata);
				}
				}

				static bool isDisabled(GpencilModifierData *md, int UNUSED(userRenderParams))
				{
				LatticeGpencilModifierData mmd = (LatticeGpencilModifierData )md;

				return !mmd->object;
				}

				static void updateDepsgraph(GpencilModifierData md, const ModifierUpdateDepsgraphContext ctx)
				{
				LatticeGpencilModifierData lmd = (LatticeGpencilModifierData )md;
				if (lmd->object != NULL) {
				DEG_add_object_relation(ctx->node, lmd->object, DEG_OB_COMP_GEOMETRY, "Lattice Modifier");
				DEG_add_object_relation(ctx->node, lmd->object, DEG_OB_COMP_TRANSFORM, "Lattice Modifier");
				}
				DEG_add_object_relation(ctx->node, ctx->object, DEG_OB_COMP_TRANSFORM, "Lattice Modifier");
				}

				static void foreachObjectLink(
				GpencilModifierData md, Object ob,
				ObjectWalkFunc walk, void *userData)
				{
				LatticeGpencilModifierData mmd = (LatticeGpencilModifierData )md;

				walk(userData, ob, &mmd->object, IDWALK_CB_NOP);
				}

				GpencilModifierTypeInfo modifierType_Gpencil_Lattice = {
				/* name */ "Lattice",
				/* structName */ "LatticeGpencilModifierData",
				/* structSize */ sizeof(LatticeGpencilModifierData),
				/* type */ eGpencilModifierTypeType_Gpencil,
				/* flags */ eGpencilModifierTypeFlag_Single \| eGpencilModifierTypeFlag_SupportsEditmode,

				/* copyData */ copyData,

				/* deformStroke */ deformStroke,
				/* generateStrokes */ NULL,
				/* bakeModifier */ bakeModifier,

				/* initData */ initData,
				/* freeData */ freeData,
				/* isDisabled */ isDisabled,
				/* updateDepsgraph */ updateDepsgraph,
				/* dependsOnTime */ NULL,
				/* foreachObjectLink */ foreachObjectLink,
				/* foreachIDLink */ NULL,
				/* foreachTexLink */ NULL,
				};