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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) 2005 by the Blender Foundation.
* All rights reserved.
*/
/** \file
* \ingroup modifiers
*/
#include <stddef.h>
#include "BLI_utildefines.h"
#include "DNA_material_types.h"
#include "DNA_mesh_types.h"
#include "BKE_editmesh.h"
#include "BKE_mesh.h"
#include "BKE_library.h"
#include "BKE_modifier.h"
#include "BKE_particle.h"
#include "DEG_depsgraph_query.h"
#include "MOD_util.h"
static void initData(ModifierData *md)
{
ParticleSystemModifierData *psmd = (ParticleSystemModifierData *) md;
psmd->psys = NULL;
psmd->mesh_final = NULL;
psmd->mesh_original = NULL;
psmd->totdmvert = psmd->totdmedge = psmd->totdmface = 0;
}
static void freeData(ModifierData *md)
{
ParticleSystemModifierData *psmd = (ParticleSystemModifierData *) md;
if (psmd->mesh_final) {
BKE_id_free(NULL, psmd->mesh_final);
psmd->mesh_final = NULL;
if (psmd->mesh_original) {
BKE_id_free(NULL, psmd->mesh_original);
psmd->mesh_original = NULL;
}
}
psmd->totdmvert = psmd->totdmedge = psmd->totdmface = 0;
/* ED_object_modifier_remove may have freed this first before calling
* modifier_free (which calls this function) */
if (psmd->psys)
psmd->psys->flag |= PSYS_DELETE;
}
static void copyData(const ModifierData *md, ModifierData *target, const int flag)
{
#if 0
const ParticleSystemModifierData *psmd = (const ParticleSystemModifierData *) md;
#endif
ParticleSystemModifierData *tpsmd = (ParticleSystemModifierData *) target;
modifier_copyData_generic(md, target, flag);
tpsmd->mesh_final = NULL;
tpsmd->mesh_original = NULL;
tpsmd->totdmvert = tpsmd->totdmedge = tpsmd->totdmface = 0;
}
static CustomDataMask requiredDataMask(Object *UNUSED(ob), ModifierData *md)
{
ParticleSystemModifierData *psmd = (ParticleSystemModifierData *) md;
return psys_emitter_customdata_mask(psmd->psys);
}
/* saves the current emitter state for a particle system and calculates particles */
static void deformVerts(
ModifierData *md, const ModifierEvalContext *ctx,
Mesh *mesh,
float (*vertexCos)[3],
int numVerts)
{
Mesh *mesh_src = mesh;
ParticleSystemModifierData *psmd = (ParticleSystemModifierData *) md;
ParticleSystem *psys = NULL;
/* float cfra = BKE_scene_frame_get(md->scene); */ /* UNUSED */
if (ctx->object->particlesystem.first)
psys = psmd->psys;
else
return;
if (!psys_check_enabled(ctx->object, psys, (ctx->flag & MOD_APPLY_RENDER) != 0))
return;
if (mesh_src == NULL) {
mesh_src = MOD_deform_mesh_eval_get(ctx->object, NULL, NULL, vertexCos, numVerts, false, true);
if (mesh_src == NULL) {
return;
}
}
/* clear old dm */
bool had_mesh_final = (psmd->mesh_final != NULL);
if (psmd->mesh_final) {
BKE_id_free(NULL, psmd->mesh_final);
psmd->mesh_final = NULL;
if (psmd->mesh_original) {
BKE_id_free(NULL, psmd->mesh_original);
psmd->mesh_original = NULL;
}
}
else if (psmd->flag & eParticleSystemFlag_file_loaded) {
/* in file read mesh just wasn't saved in file so no need to reset everything */
psmd->flag &= ~eParticleSystemFlag_file_loaded;
if (psys->particles == NULL) {
psys->recalc |= ID_RECALC_PSYS_RESET;
}
/* TODO(sergey): This is not how particles were working prior to copy on
* write, but now evaluation is similar to case when one duplicates the
* object. In that case particles were doing reset here. */
psys->recalc |= ID_RECALC_PSYS_RESET;
}
/* make new mesh */
psmd->mesh_final = BKE_mesh_copy_for_eval(mesh_src, false);
BKE_mesh_apply_vert_coords(psmd->mesh_final, vertexCos);
BKE_mesh_calc_normals(psmd->mesh_final);
BKE_mesh_tessface_ensure(psmd->mesh_final);
if (!psmd->mesh_final->runtime.deformed_only) {
/* Get the original mesh from the object, this is what the particles
* are attached to so in case of non-deform modifiers we need to remap
* them to the final mesh (typically subdivision surfaces). */
Mesh *mesh_original = NULL;
if (ctx->object->type == OB_MESH) {
BMEditMesh *em = BKE_editmesh_from_object(ctx->object);
if (em) {
/* In edit mode get directly from the edit mesh. */
psmd->mesh_original = BKE_mesh_from_bmesh_for_eval_nomain(em->bm, 0);
}
else {
/* Otherwise get regular mesh. */
mesh_original = ctx->object->data;
}
}
else {
mesh_original = mesh_src;
}
if (mesh_original) {
/* Make a persistent copy of the mesh. We don't actually need
* all this data, just some topology for remapping. Could be
* optimized once. */
psmd->mesh_original = BKE_mesh_copy_for_eval(mesh_original, false);
}
BKE_mesh_tessface_ensure(psmd->mesh_original);
}
if (mesh_src != psmd->mesh_final && mesh_src != mesh) {
BKE_id_free(NULL, mesh_src);
}
/* Report change in mesh structure.
* This is an unreliable check for the topology check, but allows some
* handy configuration like emitting particles from inside particle
* instance. */
if (had_mesh_final &&
(psmd->mesh_final->totvert != psmd->totdmvert ||
psmd->mesh_final->totedge != psmd->totdmedge ||
psmd->mesh_final->totface != psmd->totdmface))
{
psys->recalc |= ID_RECALC_PSYS_RESET;
psmd->totdmvert = psmd->mesh_final->totvert;
psmd->totdmedge = psmd->mesh_final->totedge;
psmd->totdmface = psmd->mesh_final->totface;
}
if (!(ctx->object->transflag & OB_NO_PSYS_UPDATE)) {
struct Scene *scene = DEG_get_evaluated_scene(ctx->depsgraph);
psmd->flag &= ~eParticleSystemFlag_psys_updated;
particle_system_update(ctx->depsgraph, scene, ctx->object, psys, (ctx->flag & MOD_APPLY_RENDER) != 0);
psmd->flag |= eParticleSystemFlag_psys_updated;
}
if (DEG_is_active(ctx->depsgraph)) {
Object *object_orig = DEG_get_original_object(ctx->object);
ModifierData *md_orig = modifiers_findByName(object_orig, psmd->modifier.name);
BLI_assert(md_orig != NULL);
ParticleSystemModifierData *psmd_orig = (ParticleSystemModifierData *) md_orig;
psmd_orig->flag = psmd->flag;
}
}
/* disabled particles in editmode for now, until support for proper evaluated mesh
* updates is coded */
#if 0
static void deformVertsEM(
ModifierData *md, Object *ob, BMEditMesh *editData,
Mesh *mesh, float (*vertexCos)[3], int numVerts)
{
const bool do_temp_mesh = (mesh == NULL);
if (do_temp_mesh) {
mesh = BKE_id_new_nomain(ID_ME, ((ID *)ob->data)->name);
BM_mesh_bm_to_me(NULL, editData->bm, mesh, &((BMeshToMeshParams){0}));
}
deformVerts(md, ob, mesh, vertexCos, numVerts);
if (derivedData) {
BKE_id_free(NULL, mesh);
}
}
#endif
ModifierTypeInfo modifierType_ParticleSystem = {
/* name */ "ParticleSystem",
/* structName */ "ParticleSystemModifierData",
/* structSize */ sizeof(ParticleSystemModifierData),
/* type */ eModifierTypeType_OnlyDeform,
/* flags */ eModifierTypeFlag_AcceptsMesh |
eModifierTypeFlag_SupportsMapping |
eModifierTypeFlag_UsesPointCache /* |
eModifierTypeFlag_SupportsEditmode |
eModifierTypeFlag_EnableInEditmode */,
/* copyData */ copyData,
/* deformVerts_DM */ NULL,
/* deformVertsEM_DM */ NULL,
/* deformMatrices_DM */ NULL,
/* deformMatricesEM_DM*/NULL,
/* applyModifier_DM */ NULL,
/* deformVerts */ deformVerts,
/* deformMatrices */ NULL,
/* deformVertsEM */ NULL,
/* deformMatricesEM */ NULL,
/* applyModifier */ NULL,
/* initData */ initData,
/* requiredDataMask */ requiredDataMask,
/* freeData */ freeData,
/* isDisabled */ NULL,
/* updateDepsgraph */ NULL,
/* dependsOnTime */ NULL,
/* dependsOnNormals */ NULL,
/* foreachObjectLink */ NULL,
/* foreachIDLink */ NULL,
/* foreachTexLink */ NULL,
};
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