Geometry Nodes: Don't create node tree when adding nodes modifier

Don't always create a new geometry nodes node tree when adding a
geometry nodes modifier.

This avoids files getting cluttered with empty and unused geometry node
trees that are created every time a nodes modifier is added to an
object - even if only to apply an already existing.
This is also more consistent with other modifiers that also don't
automatically create new data blocks.

The new modifier still automatically gets populated with a new node
tree when adding it via the "New" button in the header of the
geometry nodes editor.

Reviewed By: Hans Goudey, Dalai Felinto, Pablo Vazquez

Differential Revision: D14458

1 files changed, 0 insertions, 27 deletions

diff --git a/source/blender/modifiers/intern/MOD_nodes.cc b/source/blender/modifiers/intern/MOD_nodes.cc
index e94f8e50fec..182405652a6 100644
--- a/source/blender/modifiers/intern/MOD_nodes.cc
+++ b/source/blender/modifiers/intern/MOD_nodes.cc
@@ -732,33 +732,6 @@ void MOD_nodes_update_interface(Object *object, NodesModifierData *nmd)
   DEG_id_tag_update(&object->id, ID_RECALC_GEOMETRY);
 }
 
-void MOD_nodes_init(Main *bmain, NodesModifierData *nmd)
-{
-  bNodeTree *ntree = ntreeAddTree(bmain, "Geometry Nodes", ntreeType_Geometry->idname);
-  nmd->node_group = ntree;
-
-  ntreeAddSocketInterface(ntree, SOCK_IN, "NodeSocketGeometry", "Geometry");
-  ntreeAddSocketInterface(ntree, SOCK_OUT, "NodeSocketGeometry", "Geometry");
-
-  bNode *group_input_node = nodeAddStaticNode(nullptr, ntree, NODE_GROUP_INPUT);
-  bNode *group_output_node = nodeAddStaticNode(nullptr, ntree, NODE_GROUP_OUTPUT);
-
-  nodeSetSelected(group_input_node, false);
-  nodeSetSelected(group_output_node, false);
-
-  group_input_node->locx = -200 - group_input_node->width;
-  group_output_node->locx = 200;
-  group_output_node->flag |= NODE_DO_OUTPUT;
-
-  nodeAddLink(ntree,
-              group_output_node,
-              (bNodeSocket *)group_output_node->inputs.first,
-              group_input_node,
-              (bNodeSocket *)group_input_node->outputs.first);
-
-  BKE_ntree_update_main_tree(bmain, ntree, nullptr);
-}
-
 static void initialize_group_input(NodesModifierData &nmd,
                                    const OutputSocketRef &socket,
                                    void *r_value)