Geometry Nodes: Add "Connected" mode to Merge by Distance node

Expose the "Connected" mode from the weld modifier in the
"Merge by Distance" geometry node. This method only merges
vertices along existing edges, but it can be much faster
because it doesn't have to build a KD Tree of all selected
points.

Differential Revision: https://developer.blender.org/D14321

1 files changed, 26 insertions, 0 deletions

diff --git a/source/blender/makesrna/intern/rna_nodetree.c b/source/blender/makesrna/intern/rna_nodetree.c
index cbac6aefc10..31b2d36dcfd 100644
--- a/source/blender/makesrna/intern/rna_nodetree.c
+++ b/source/blender/makesrna/intern/rna_nodetree.c
@@ -9846,6 +9846,32 @@ static void def_geo_mesh_cone(StructRNA *srna)
   RNA_def_property_update(prop, NC_NODE | NA_EDITED, "rna_Node_socket_update");
 }
 
+static void def_geo_merge_by_distance(StructRNA *srna)
+{
+  PropertyRNA *prop;
+
+  static EnumPropertyItem mode_items[] = {
+      {GEO_NODE_MERGE_BY_DISTANCE_MODE_ALL,
+       "ALL",
+       0,
+       "All",
+       "Merge all close selected points, whether or not they are connected"},
+      {GEO_NODE_MERGE_BY_DISTANCE_MODE_CONNECTED,
+       "CONNECTED",
+       0,
+       "Connected",
+       "Only merge mesh vertices along existing edges. This method can be much faster"},
+      {0, NULL, 0, NULL, NULL},
+  };
+
+  RNA_def_struct_sdna_from(srna, "NodeGeometryMergeByDistance", "storage");
+
+  prop = RNA_def_property(srna, "mode", PROP_ENUM, PROP_NONE);
+  RNA_def_property_enum_items(prop, mode_items);
+  RNA_def_property_ui_text(prop, "Mode", "");
+  RNA_def_property_update(prop, NC_NODE | NA_EDITED, "rna_Node_socket_update");
+}
+
 static void def_geo_mesh_line(StructRNA *srna)
 {
   PropertyRNA *prop;