Nodes: refactor derived node tree

This is a complete rewrite of the derived node tree data structure.
It is a much thinner abstraction about `NodeTreeRef` than before.
This gives the user of the derived node tree more control and allows
for greater introspection capabilities (e.g. before muted nodes were
completely abstracted away; this was convenient, but came with
limitations).

Another nice benefit of the new structure is that it is much cheaper
to build, because it does not inline all nodes and sockets in nested
node groups.

Differential Revision: https://developer.blender.org/D10620

1 files changed, 3 insertions, 3 deletions

diff --git a/source/blender/nodes/NOD_geometry_exec.hh b/source/blender/nodes/NOD_geometry_exec.hh
index e648d77337b..1772f92c4b6 100644
--- a/source/blender/nodes/NOD_geometry_exec.hh
+++ b/source/blender/nodes/NOD_geometry_exec.hh
@@ -59,7 +59,7 @@ using fn::GValueMap;
 
 class GeoNodeExecParams {
  private:
-  const DNode &node_;
+  const DNode node_;
   GValueMap<StringRef> &input_values_;
   GValueMap<StringRef> &output_values_;
   const PersistentDataHandleMap &handle_map_;
@@ -68,7 +68,7 @@ class GeoNodeExecParams {
   Depsgraph *depsgraph_;
 
  public:
-  GeoNodeExecParams(const DNode &node,
+  GeoNodeExecParams(const DNode node,
                     GValueMap<StringRef> &input_values,
                     GValueMap<StringRef> &output_values,
                     const PersistentDataHandleMap &handle_map,
@@ -182,7 +182,7 @@ class GeoNodeExecParams {
    */
   const bNode &node() const
   {
-    return *node_.bnode();
+    return *node_->bnode();
   }
 
   const PersistentDataHandleMap &handle_map() const