1 /*
2 * Copyright 2011-2013 Blender Foundation
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "render/mesh.h"
18 #include "render/object.h"
19 #include "render/particles.h"
20
21 #include "blender/blender_sync.h"
22 #include "blender/blender_util.h"
23
24 #include "util/util_foreach.h"
25
26 CCL_NAMESPACE_BEGIN
27
28 /* Utilities */
29
sync_dupli_particle(BL::Object & b_ob,BL::DepsgraphObjectInstance & b_instance,Object * object)30 bool BlenderSync::sync_dupli_particle(BL::Object &b_ob,
31 BL::DepsgraphObjectInstance &b_instance,
32 Object *object)
33 {
34 /* test if this dupli was generated from a particle sytem */
35 BL::ParticleSystem b_psys = b_instance.particle_system();
36 if (!b_psys)
37 return false;
38
39 object->hide_on_missing_motion = true;
40
41 /* test if we need particle data */
42 if (!object->geometry->need_attribute(scene, ATTR_STD_PARTICLE))
43 return false;
44
45 /* don't handle child particles yet */
46 BL::Array<int, OBJECT_PERSISTENT_ID_SIZE> persistent_id = b_instance.persistent_id();
47
48 if (persistent_id[0] >= b_psys.particles.length())
49 return false;
50
51 /* find particle system */
52 ParticleSystemKey key(b_ob, persistent_id);
53 ParticleSystem *psys;
54
55 bool first_use = !particle_system_map.is_used(key);
56 bool need_update = particle_system_map.add_or_update(&psys, b_ob, b_instance.object(), key);
57
58 /* no update needed? */
59 if (!need_update && !object->geometry->need_update && !scene->object_manager->need_update)
60 return true;
61
62 /* first time used in this sync loop? clear and tag update */
63 if (first_use) {
64 psys->particles.clear();
65 psys->tag_update(scene);
66 }
67
68 /* add particle */
69 BL::Particle b_pa = b_psys.particles[persistent_id[0]];
70 Particle pa;
71
72 pa.index = persistent_id[0];
73 pa.age = b_scene.frame_current() - b_pa.birth_time();
74 pa.lifetime = b_pa.lifetime();
75 pa.location = get_float3(b_pa.location());
76 pa.rotation = get_float4(b_pa.rotation());
77 pa.size = b_pa.size();
78 pa.velocity = get_float3(b_pa.velocity());
79 pa.angular_velocity = get_float3(b_pa.angular_velocity());
80
81 psys->particles.push_back_slow(pa);
82
83 if (object->particle_index != psys->particles.size() - 1)
84 scene->object_manager->tag_update(scene);
85 object->particle_system = psys;
86 object->particle_index = psys->particles.size() - 1;
87
88 /* return that this object has particle data */
89 return true;
90 }
91
92 CCL_NAMESPACE_END
93