Geometry Nodes: Add Attribute Proximity Node

This node calculates a distance from each point to the closest position
on a target geometry, similar to the vertex weight proximity modifier.
Mapping the output distance to a different range can be done with an
attribute math node after this node.

A drop-down changes whether to calculate distances from points,
edges, or faces. In points mode, the node also calculates distances
from point cloud points.

Design task and use cases: T84842

Differential Revision: https://developer.blender.org/D10154

1 files changed, 10 insertions, 0 deletions

diff --git a/source/blender/editors/space_node/drawnode.c b/source/blender/editors/space_node/drawnode.c
index d7edb1ecbed..b16ccb9bce4 100644
--- a/source/blender/editors/space_node/drawnode.c
+++ b/source/blender/editors/space_node/drawnode.c
@@ -3381,6 +3381,13 @@ static void node_geometry_buts_collection_info(uiLayout *layout,
   uiItemR(layout, ptr, "transform_space", UI_ITEM_R_EXPAND, NULL, ICON_NONE);
 }
 
+static void node_geometry_buts_attribute_proximity(uiLayout *layout,
+                                                   bContext *UNUSED(C),
+                                                   PointerRNA *ptr)
+{
+  uiItemR(layout, ptr, "target_geometry_element", DEFAULT_FLAGS, "", ICON_NONE);
+}
+
 static void node_geometry_set_butfunc(bNodeType *ntype)
 {
   switch (ntype->type) {
@@ -3444,6 +3451,9 @@ static void node_geometry_set_butfunc(bNodeType *ntype)
     case GEO_NODE_COLLECTION_INFO:
       ntype->draw_buttons = node_geometry_buts_collection_info;
       break;
+    case GEO_NODE_ATTRIBUTE_PROXIMITY:
+      ntype->draw_buttons = node_geometry_buts_attribute_proximity;
+      break;
   }
 }