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/* SPDX-License-Identifier: Apache-2.0
* Copyright 2011-2022 Blender Foundation */
#include "scene/particles.h"
#include "scene/mesh.h"
#include "scene/object.h"
#include "blender/sync.h"
#include "blender/util.h"
#include "util/foreach.h"
CCL_NAMESPACE_BEGIN
/* Utilities */
bool BlenderSync::sync_dupli_particle(BL::Object &b_ob,
BL::DepsgraphObjectInstance &b_instance,
Object *object)
{
/* Test if this dupli was generated from a particle system. */
BL::ParticleSystem b_psys = b_instance.particle_system();
if (!b_psys)
return false;
object->set_hide_on_missing_motion(true);
/* test if we need particle data */
if (!object->get_geometry()->need_attribute(scene, ATTR_STD_PARTICLE))
return false;
/* don't handle child particles yet */
BL::Array<int, OBJECT_PERSISTENT_ID_SIZE> persistent_id = b_instance.persistent_id();
if (persistent_id[0] >= b_psys.particles.length())
return false;
/* find particle system */
ParticleSystemKey key(b_ob, persistent_id);
ParticleSystem *psys;
bool first_use = !particle_system_map.is_used(key);
bool need_update = particle_system_map.add_or_update(&psys, b_ob, b_instance.object(), key);
/* no update needed? */
if (!need_update && !object->get_geometry()->is_modified() &&
!scene->object_manager->need_update())
return true;
/* first time used in this sync loop? clear and tag update */
if (first_use) {
psys->particles.clear();
psys->tag_update(scene);
}
/* add particle */
BL::Particle b_pa = b_psys.particles[persistent_id[0]];
Particle pa;
pa.index = persistent_id[0];
pa.age = b_scene.frame_current_final() - b_pa.birth_time();
pa.lifetime = b_pa.lifetime();
pa.location = get_float3(b_pa.location());
pa.rotation = get_float4(b_pa.rotation());
pa.size = b_pa.size();
pa.velocity = get_float3(b_pa.velocity());
pa.angular_velocity = get_float3(b_pa.angular_velocity());
psys->particles.push_back_slow(pa);
object->set_particle_system(psys);
object->set_particle_index(psys->particles.size() - 1);
if (object->particle_index_is_modified())
scene->object_manager->tag_update(scene, ObjectManager::PARTICLE_MODIFIED);
/* return that this object has particle data */
return true;
}
CCL_NAMESPACE_END
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