1 files changed, 94 insertions, 0 deletions
diff --git a/source/blender/depsgraph/intern/depsgraph_physics.cc b/source/blender/depsgraph/intern/depsgraph_physics.cc
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+++ b/source/blender/depsgraph/intern/depsgraph_physics.cc
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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"
+
+extern "C" {
+#include "BKE_effect.h"
+} /* extern "C" */
+
+#include "DNA_group_types.h"
+
+#include "DEG_depsgraph_physics.h"
+
+#include "depsgraph.h"
+#include "depsgraph_intern.h"
+
+/************************ Public API *************************/
+
+ListBase *DEG_get_effector_relations(const Depsgraph *graph,
+                                     Collection *collection)
+{
+	const DEG::Depsgraph *deg_graph = reinterpret_cast<const DEG::Depsgraph *>(graph);
+	if (deg_graph->effector_relations == NULL) {
+		return NULL;
+	}
+
+	return (ListBase *)BLI_ghash_lookup(deg_graph->effector_relations, collection);
+}
+
+/*********************** Internal API ************************/
+
+namespace DEG
+{
+
+ListBase *deg_build_effector_relations(Depsgraph *graph,
+                                       Collection *collection)
+{
+	if (graph->effector_relations == NULL) {
+		graph->effector_relations = BLI_ghash_ptr_new("Depsgraph effector relations hash");
+	}
+
+	ListBase *relations = reinterpret_cast<ListBase*>(BLI_ghash_lookup(graph->effector_relations, collection));
+	if (relations == NULL) {
+		::Depsgraph *depsgraph = reinterpret_cast<::Depsgraph*>(graph);
+		relations = BKE_effector_relations_create(depsgraph, graph->view_layer, collection);
+		BLI_ghash_insert(graph->effector_relations, collection, relations);
+	}
+
+	return relations;
+}
+
+static void free_effector_relations(void *value)
+{
+	BKE_effector_relations_free(reinterpret_cast<ListBase*>(value));
+}
+
+void deg_clear_physics_relations(Depsgraph *graph)
+{
+	if (graph->effector_relations) {
+		BLI_ghash_free(graph->effector_relations, NULL, free_effector_relations);
+		graph->effector_relations = NULL;
+	}
+}
+
+}