1 files changed, 57 insertions, 0 deletions
diff --git a/source/blender/nodes/intern/node_tree_dependencies.cc b/source/blender/nodes/intern/node_tree_dependencies.cc
new file mode 100644
index 00000000000..efe75a10f7e
--- /dev/null
+++ b/source/blender/nodes/intern/node_tree_dependencies.cc
@@ -0,0 +1,57 @@
+/*
+ * 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.
+ */
+
+#include "NOD_node_tree_dependencies.hh"
+
+#include "DNA_node_types.h"
+
+#include "BKE_node.h"
+
+namespace blender::nodes {
+
+static void add_dependencies_of_node_tree(bNodeTree &ntree, NodeTreeDependencies &r_dependencies)
+{
+  /* TODO: Do a bit more sophisticated parsing to see which dependencies are really required. */
+  LISTBASE_FOREACH (bNode *, node, &ntree.nodes) {
+    LISTBASE_FOREACH (bNodeSocket *, socket, &node->inputs) {
+      if (socket->type == SOCK_OBJECT) {
+        Object *object = ((bNodeSocketValueObject *)socket->default_value)->value;
+        if (object != nullptr) {
+          r_dependencies.add_transform_dependency(object);
+          if (object->type == OB_MESH) {
+            r_dependencies.add_geometry_dependency(object);
+          }
+        }
+      }
+    }
+
+    if (node->type == NODE_GROUP) {
+      bNodeTree *group = (bNodeTree *)node->id;
+      if (group != nullptr) {
+        add_dependencies_of_node_tree(*group, r_dependencies);
+      }
+    }
+  }
+}
+
+NodeTreeDependencies find_node_tree_dependencies(bNodeTree &ntree)
+{
+  NodeTreeDependencies dependencies;
+  add_dependencies_of_node_tree(ntree, dependencies);
+  return dependencies;
+}
+
+}  // namespace blender::nodes