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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2005 Blender Foundation. All rights reserved. */
/** \file
* \ingroup modifiers
*/
#include <stddef.h>
#include <string.h>
#include "BLI_utildefines.h"
#include "BLT_translation.h"
#include "DNA_defaults.h"
#include "DNA_material_types.h"
#include "DNA_mesh_types.h"
#include "DNA_screen_types.h"
#include "BKE_context.h"
#include "BKE_editmesh.h"
#include "BKE_lib_id.h"
#include "BKE_mesh.h"
#include "BKE_modifier.h"
#include "BKE_particle.h"
#include "BKE_screen.h"
#include "UI_interface.h"
#include "UI_resources.h"
#include "RNA_access.h"
#include "RNA_prototypes.h"
#include "DEG_depsgraph_query.h"
#include "BLO_read_write.h"
#include "MOD_ui_common.h"
#include "MOD_util.h"
static void initData(ModifierData *md)
{
ParticleSystemModifierData *psmd = (ParticleSystemModifierData *)md;
BLI_assert(MEMCMP_STRUCT_AFTER_IS_ZERO(psmd, modifier));
MEMCPY_STRUCT_AFTER(psmd, DNA_struct_default_get(ParticleSystemModifierData), modifier);
}
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
* BKE_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;
BKE_modifier_copydata_generic(md, target, flag);
/* NOTE: `psys` pointer here is just copied over from `md` to `target`. This is dangerous, as it
* will generate invalid data in case we are copying between different objects. Extra external
* code has to be called then to ensure proper remapping of that pointer. See e.g.
* `BKE_object_copy_particlesystems` or `BKE_object_copy_modifier`. */
tpsmd->mesh_final = NULL;
tpsmd->mesh_original = NULL;
tpsmd->totdmvert = tpsmd->totdmedge = tpsmd->totdmface = 0;
}
static void requiredDataMask(Object *UNUSED(ob),
ModifierData *md,
CustomData_MeshMasks *r_cddata_masks)
{
ParticleSystemModifierData *psmd = (ParticleSystemModifierData *)md;
psys_emitter_customdata_mask(psmd->psys, r_cddata_masks);
}
/* 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 verts_num)
{
Mesh *mesh_src = mesh;
ParticleSystemModifierData *psmd = (ParticleSystemModifierData *)md;
ParticleSystem *psys = NULL;
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, verts_num, 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.
*
* Don't do reset when entering particle edit mode, as that will destroy the edit mode data.
* Shouldn't be an issue, since particles are supposed to be evaluated once prior to entering
* edit mode anyway.
* Could in theory be an issue when everything is done in a script, but then solution is
* not known to me. */
if (ctx->object->mode != OB_MODE_PARTICLE_EDIT) {
psys->recalc |= ID_RECALC_PSYS_RESET;
}
}
/* make new mesh */
psmd->mesh_final = BKE_mesh_copy_for_eval(mesh_src, false);
BKE_mesh_vert_coords_apply(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, NULL, mesh);
}
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 (!ELEM(mesh_src, NULL, mesh, psmd->mesh_final)) {
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;
{
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 = BKE_modifiers_findby_name(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 verts_num)
{
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, verts_num);
if (derivedData) {
BKE_id_free(NULL, mesh);
}
}
#endif
static void panel_draw(const bContext *UNUSED(C), Panel *panel)
{
uiLayout *layout = panel->layout;
PointerRNA ob_ptr;
PointerRNA *ptr = modifier_panel_get_property_pointers(panel, &ob_ptr);
Object *ob = ob_ptr.data;
ModifierData *md = (ModifierData *)ptr->data;
ParticleSystem *psys = ((ParticleSystemModifierData *)md)->psys;
uiItemL(layout, TIP_("Settings are in the particle tab"), ICON_NONE);
if (!(ob->mode & OB_MODE_PARTICLE_EDIT)) {
if (ELEM(psys->part->ren_as, PART_DRAW_GR, PART_DRAW_OB)) {
uiItemO(layout,
CTX_IFACE_(BLT_I18NCONTEXT_OPERATOR_DEFAULT, "Make Instances Real"),
ICON_NONE,
"OBJECT_OT_duplicates_make_real");
}
else if (psys->part->ren_as == PART_DRAW_PATH) {
uiItemO(layout,
CTX_IFACE_(BLT_I18NCONTEXT_OPERATOR_DEFAULT, "Convert to Mesh"),
ICON_NONE,
"OBJECT_OT_modifier_convert");
}
}
modifier_panel_end(layout, ptr);
}
static void panelRegister(ARegionType *region_type)
{
modifier_panel_register(region_type, eModifierType_ParticleSystem, panel_draw);
}
static void blendRead(BlendDataReader *reader, ModifierData *md)
{
ParticleSystemModifierData *psmd = (ParticleSystemModifierData *)md;
psmd->mesh_final = NULL;
psmd->mesh_original = NULL;
/* This is written as part of ob->particlesystem. */
BLO_read_data_address(reader, &psmd->psys);
psmd->flag &= ~eParticleSystemFlag_psys_updated;
psmd->flag |= eParticleSystemFlag_file_loaded;
}
ModifierTypeInfo modifierType_ParticleSystem = {
/* name */ "ParticleSystem",
/* structName */ "ParticleSystemModifierData",
/* structSize */ sizeof(ParticleSystemModifierData),
/* srna */ &RNA_ParticleSystemModifier,
/* type */ eModifierTypeType_OnlyDeform,
/* flags */ eModifierTypeFlag_AcceptsMesh | eModifierTypeFlag_SupportsMapping |
eModifierTypeFlag_UsesPointCache /* |
eModifierTypeFlag_SupportsEditmode |
eModifierTypeFlag_EnableInEditmode */
,
/* icon */ ICON_MOD_PARTICLES,
/* copyData */ copyData,
/* deformVerts */ deformVerts,
/* deformMatrices */ NULL,
/* deformVertsEM */ NULL,
/* deformMatricesEM */ NULL,
/* modifyMesh */ NULL,
/* modifyGeometrySet */ NULL,
/* initData */ initData,
/* requiredDataMask */ requiredDataMask,
/* freeData */ freeData,
/* isDisabled */ NULL,
/* updateDepsgraph */ NULL,
/* dependsOnTime */ NULL,
/* dependsOnNormals */ NULL,
/* foreachIDLink */ NULL,
/* foreachTexLink */ NULL,
/* freeRuntimeData */ NULL,
/* panelRegister */ panelRegister,
/* blendWrite */ NULL,
/* blendRead */ blendRead,
};
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