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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* 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) 2018 Blender Foundation.
* All rights reserved.
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/depsgraph/intern/depsgraph_physics.cc
* \ingroup depsgraph
*
* Physics utilities for effectors and collision.
*/
#include "MEM_guardedalloc.h"
#include "BLI_compiler_compat.h"
#include "BLI_ghash.h"
#include "BLI_listbase.h"
extern "C" {
#include "BKE_collision.h"
#include "BKE_effect.h"
#include "BKE_modifier.h"
} /* extern "C" */
#include "DNA_group_types.h"
#include "DNA_object_types.h"
#include "DNA_object_force_types.h"
#include "DEG_depsgraph_build.h"
#include "DEG_depsgraph_physics.h"
#include "DEG_depsgraph_query.h"
#include "depsgraph.h"
#include "depsgraph_intern.h"
/*********************** 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_Smoke:
return DEG_PHYSICS_SMOKE_COLLISION;
case eModifierType_DynamicPaint:
return DEG_PHYSICS_DYNAMIC_BRUSH;
}
BLI_assert(!"Unknown collision modifier type");
return DEG_PHYSICS_RELATIONS_NUM;
}
ListBase *DEG_get_effector_relations(const Depsgraph *graph,
Collection *collection)
{
const DEG::Depsgraph *deg_graph = reinterpret_cast<const DEG::Depsgraph *>(graph);
if (deg_graph->physics_relations[DEG_PHYSICS_EFFECTOR] == NULL) {
return NULL;
}
ID *collection_orig = DEG_get_original_id(&collection->id);
return (ListBase *)BLI_ghash_lookup(deg_graph->physics_relations[DEG_PHYSICS_EFFECTOR], collection_orig);
}
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);
if (deg_graph->physics_relations[type] == NULL) {
return NULL;
}
ID *collection_orig = DEG_get_original_id(&collection->id);
return (ListBase *)BLI_ghash_lookup(deg_graph->physics_relations[type], collection_orig);
}
/********************** Depsgraph Building API ************************/
void DEG_add_collision_relations(DepsNodeHandle *handle,
Object *object,
Collection *collection,
unsigned int modifier_type,
DEG_CollobjFilterFunction fn,
const char *name)
{
Depsgraph *depsgraph = DEG_get_graph_from_handle(handle);
DEG::Depsgraph *deg_graph = (DEG::Depsgraph *)depsgraph;
ListBase *relations = deg_build_collision_relations(deg_graph, collection, modifier_type);
LISTBASE_FOREACH (CollisionRelation *, relation, relations) {
Object *ob1 = relation->ob;
if (ob1 != object) {
if (!fn || fn(ob1, modifiers_findByType(ob1, (ModifierType)modifier_type))) {
DEG_add_object_relation(handle, ob1, DEG_OB_COMP_TRANSFORM, name);
DEG_add_object_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 = deg_build_effector_relations(deg_graph, effector_weights->group);
LISTBASE_FOREACH (EffectorRelation *, relation, relations) {
if (relation->ob != object && relation->pd->forcefield != skip_forcefield) {
DEG_add_object_relation(handle, relation->ob, DEG_OB_COMP_TRANSFORM, name);
if (relation->psys) {
DEG_add_object_relation(handle, relation->ob, DEG_OB_COMP_EVAL_PARTICLES, name);
/* TODO: remove this when/if EVAL_PARTICLES is sufficient
* for up to date particles.
*/
DEG_add_object_relation(handle, relation->ob, DEG_OB_COMP_GEOMETRY, name);
}
if (relation->pd->forcefield == PFIELD_SMOKEFLOW && relation->pd->f_source) {
DEG_add_object_relation(handle,
relation->pd->f_source,
DEG_OB_COMP_TRANSFORM,
"Smoke Force Domain");
DEG_add_object_relation(handle,
relation->pd->f_source,
DEG_OB_COMP_GEOMETRY,
"Smoke Force Domain");
}
if (add_absorption && (relation->pd->flag & PFIELD_VISIBILITY)) {
DEG_add_collision_relations(handle,
object,
NULL,
eModifierType_Collision,
NULL,
"Force Absorption");
}
}
}
}
/**************************** Internal API ****************************/
namespace DEG
{
ListBase *deg_build_effector_relations(Depsgraph *graph,
Collection *collection)
{
GHash *hash = graph->physics_relations[DEG_PHYSICS_EFFECTOR];
if (hash == NULL) {
graph->physics_relations[DEG_PHYSICS_EFFECTOR] = BLI_ghash_ptr_new("Depsgraph physics relations hash");
hash = graph->physics_relations[DEG_PHYSICS_EFFECTOR];
}
ListBase *relations = reinterpret_cast<ListBase*>(BLI_ghash_lookup(hash, collection));
if (relations == NULL) {
::Depsgraph *depsgraph = reinterpret_cast<::Depsgraph*>(graph);
relations = BKE_effector_relations_create(depsgraph, graph->view_layer, collection);
BLI_ghash_insert(hash, &collection->id, relations);
}
return relations;
}
ListBase *deg_build_collision_relations(Depsgraph *graph,
Collection *collection,
unsigned int modifier_type)
{
const ePhysicsRelationType type = modifier_to_relation_type(modifier_type);
GHash *hash = graph->physics_relations[type];
if (hash == NULL) {
graph->physics_relations[type] = BLI_ghash_ptr_new("Depsgraph physics relations hash");
hash = graph->physics_relations[type];
}
ListBase *relations = reinterpret_cast<ListBase*>(BLI_ghash_lookup(hash, collection));
if (relations == NULL) {
::Depsgraph *depsgraph = reinterpret_cast<::Depsgraph*>(graph);
relations = BKE_collision_relations_create(depsgraph, collection, modifier_type);
BLI_ghash_insert(hash, &collection->id, relations);
}
return relations;
}
static void free_effector_relations(void *value)
{
BKE_effector_relations_free(reinterpret_cast<ListBase*>(value));
}
static void free_collision_relations(void *value)
{
BKE_collision_relations_free(reinterpret_cast<ListBase*>(value));
}
void deg_clear_physics_relations(Depsgraph *graph)
{
for (int i = 0; i < DEG_PHYSICS_RELATIONS_NUM; i++) {
if (graph->physics_relations[i]) {
ePhysicsRelationType type = (ePhysicsRelationType)i;
switch (type) {
case DEG_PHYSICS_EFFECTOR:
BLI_ghash_free(graph->physics_relations[i], NULL, free_effector_relations);
break;
case DEG_PHYSICS_COLLISION:
case DEG_PHYSICS_SMOKE_COLLISION:
case DEG_PHYSICS_DYNAMIC_BRUSH:
BLI_ghash_free(graph->physics_relations[i], NULL, free_collision_relations);
break;
case DEG_PHYSICS_RELATIONS_NUM:
break;
}
graph->physics_relations[i] = NULL;
}
}
}
}
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