1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2018 Blender Foundation. All rights reserved. */
/** \file
* \ingroup depsgraph
*
* Physics utilities for effectors and collision.
*/
#include "intern/depsgraph_physics.h"
#include "MEM_guardedalloc.h"
#include "BLI_compiler_compat.h"
#include "BLI_listbase.h"
#include "BKE_collision.h"
#include "BKE_effect.h"
#include "BKE_modifier.h"
#include "DNA_collection_types.h"
#include "DNA_object_force_types.h"
#include "DNA_object_types.h"
#include "DEG_depsgraph_build.h"
#include "DEG_depsgraph_physics.h"
#include "DEG_depsgraph_query.h"
#include "depsgraph.h"
namespace deg = blender::deg;
/*************************** Evaluation Query API *****************************/
static ePhysicsRelationType modifier_to_relation_type(unsigned int modifier_type)
{
switch (modifier_type) {
case eModifierType_Collision:
return DEG_PHYSICS_COLLISION;
case eModifierType_Fluid:
return DEG_PHYSICS_SMOKE_COLLISION;
case eModifierType_DynamicPaint:
return DEG_PHYSICS_DYNAMIC_BRUSH;
}
BLI_assert_msg(0, "Unknown collision modifier type");
return DEG_PHYSICS_RELATIONS_NUM;
}
/* Get ID from an ID type object, in a safe manner. This means that object can be nullptr,
* in which case the function returns nullptr.
*/
template<class T> static ID *object_id_safe(T *object)
{
if (object == nullptr) {
return nullptr;
}
return &object->id;
}
ListBase *DEG_get_effector_relations(const Depsgraph *graph, Collection *collection)
{
const deg::Depsgraph *deg_graph = reinterpret_cast<const deg::Depsgraph *>(graph);
blender::Map<const ID *, ListBase *> *hash = deg_graph->physics_relations[DEG_PHYSICS_EFFECTOR];
if (hash == nullptr) {
return nullptr;
}
/* NOTE: nullptr is a valid lookup key here as it means that the relation is not bound to a
* specific collection. */
ID *collection_orig = DEG_get_original_id(object_id_safe(collection));
return hash->lookup_default(collection_orig, nullptr);
}
ListBase *DEG_get_collision_relations(const Depsgraph *graph,
Collection *collection,
unsigned int modifier_type)
{
const deg::Depsgraph *deg_graph = reinterpret_cast<const deg::Depsgraph *>(graph);
const ePhysicsRelationType type = modifier_to_relation_type(modifier_type);
blender::Map<const ID *, ListBase *> *hash = deg_graph->physics_relations[type];
if (hash == nullptr) {
return nullptr;
}
/* NOTE: nullptr is a valid lookup key here as it means that the relation is not bound to a
* specific collection. */
ID *collection_orig = DEG_get_original_id(object_id_safe(collection));
return hash->lookup_default(collection_orig, nullptr);
}
/********************** Depsgraph Building API ************************/
void DEG_add_collision_relations(DepsNodeHandle *handle,
Object *object,
Collection *collection,
unsigned int modifier_type,
DEG_CollobjFilterFunction filter_function,
const char *name)
{
Depsgraph *depsgraph = DEG_get_graph_from_handle(handle);
deg::Depsgraph *deg_graph = (deg::Depsgraph *)depsgraph;
ListBase *relations = build_collision_relations(deg_graph, collection, modifier_type);
LISTBASE_FOREACH (CollisionRelation *, relation, relations) {
Object *ob1 = relation->ob;
if (ob1 == object) {
continue;
}
if (filter_function == nullptr ||
filter_function(ob1, BKE_modifiers_findby_type(ob1, (ModifierType)modifier_type))) {
DEG_add_object_pointcache_relation(handle, ob1, DEG_OB_COMP_TRANSFORM, name);
DEG_add_object_pointcache_relation(handle, ob1, DEG_OB_COMP_GEOMETRY, name);
}
}
}
void DEG_add_forcefield_relations(DepsNodeHandle *handle,
Object *object,
EffectorWeights *effector_weights,
bool add_absorption,
int skip_forcefield,
const char *name)
{
Depsgraph *depsgraph = DEG_get_graph_from_handle(handle);
deg::Depsgraph *deg_graph = (deg::Depsgraph *)depsgraph;
ListBase *relations = build_effector_relations(deg_graph, effector_weights->group);
LISTBASE_FOREACH (EffectorRelation *, relation, relations) {
if (relation->ob == object) {
continue;
}
if (relation->pd->forcefield == skip_forcefield) {
continue;
}
/* Relation to forcefield object, optionally including geometry.
* Use special point cache relations for automatic cache clearing. */
DEG_add_object_pointcache_relation(handle, relation->ob, DEG_OB_COMP_TRANSFORM, name);
if (relation->psys || ELEM(relation->pd->shape, PFIELD_SHAPE_SURFACE, PFIELD_SHAPE_POINTS) ||
relation->pd->forcefield == PFIELD_GUIDE) {
/* TODO(sergey): Consider going more granular with more dedicated
* particle system operation. */
DEG_add_object_pointcache_relation(handle, relation->ob, DEG_OB_COMP_GEOMETRY, name);
}
/* Smoke flow relations. */
if (relation->pd->forcefield == PFIELD_FLUIDFLOW && relation->pd->f_source != nullptr) {
DEG_add_object_pointcache_relation(
handle, relation->pd->f_source, DEG_OB_COMP_TRANSFORM, "Fluid Force Domain");
DEG_add_object_pointcache_relation(
handle, relation->pd->f_source, DEG_OB_COMP_GEOMETRY, "Fluid Force Domain");
}
/* Absorption forces need collision relation. */
if (add_absorption && (relation->pd->flag & PFIELD_VISIBILITY)) {
DEG_add_collision_relations(
handle, object, nullptr, eModifierType_Collision, nullptr, "Force Absorption");
}
}
}
/******************************** Internal API ********************************/
namespace blender::deg {
ListBase *build_effector_relations(Depsgraph *graph, Collection *collection)
{
Map<const ID *, ListBase *> *hash = graph->physics_relations[DEG_PHYSICS_EFFECTOR];
if (hash == nullptr) {
graph->physics_relations[DEG_PHYSICS_EFFECTOR] = new Map<const ID *, ListBase *>();
hash = graph->physics_relations[DEG_PHYSICS_EFFECTOR];
}
/* If collection is nullptr still use it as a key.
* In this case the BKE_effector_relations_create() will create relates for all bases in the
* view layer.
*/
ID *collection_id = object_id_safe(collection);
return hash->lookup_or_add_cb(collection_id, [&]() {
::Depsgraph *depsgraph = reinterpret_cast<::Depsgraph *>(graph);
return BKE_effector_relations_create(depsgraph, graph->view_layer, collection);
});
}
ListBase *build_collision_relations(Depsgraph *graph,
Collection *collection,
unsigned int modifier_type)
{
const ePhysicsRelationType type = modifier_to_relation_type(modifier_type);
Map<const ID *, ListBase *> *hash = graph->physics_relations[type];
if (hash == nullptr) {
graph->physics_relations[type] = new Map<const ID *, ListBase *>();
hash = graph->physics_relations[type];
}
/* If collection is nullptr still use it as a key.
* In this case the BKE_collision_relations_create() will create relates for all bases in the
* view layer.
*/
ID *collection_id = object_id_safe(collection);
return hash->lookup_or_add_cb(collection_id, [&]() {
::Depsgraph *depsgraph = reinterpret_cast<::Depsgraph *>(graph);
return BKE_collision_relations_create(depsgraph, collection, modifier_type);
});
}
void clear_physics_relations(Depsgraph *graph)
{
for (int i = 0; i < DEG_PHYSICS_RELATIONS_NUM; i++) {
Map<const ID *, ListBase *> *hash = graph->physics_relations[i];
if (hash) {
const ePhysicsRelationType type = (ePhysicsRelationType)i;
switch (type) {
case DEG_PHYSICS_EFFECTOR:
for (ListBase *list : hash->values()) {
BKE_effector_relations_free(list);
}
break;
case DEG_PHYSICS_COLLISION:
case DEG_PHYSICS_SMOKE_COLLISION:
case DEG_PHYSICS_DYNAMIC_BRUSH:
for (ListBase *list : hash->values()) {
BKE_collision_relations_free(list);
}
break;
case DEG_PHYSICS_RELATIONS_NUM:
break;
}
delete hash;
graph->physics_relations[i] = nullptr;
}
}
}
} // namespace blender::deg
|
