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, 13 insertions, 0 deletions

diff --git a/source/blender/makesdna/DNA_node_types.h b/source/blender/makesdna/DNA_node_types.h
index a69af18ded2..edab43c752e 100644
--- a/source/blender/makesdna/DNA_node_types.h
+++ b/source/blender/makesdna/DNA_node_types.h
@@ -1202,6 +1202,13 @@ typedef struct NodeGeometryCollectionInfo {
   char _pad[7];
 } NodeGeometryCollectionInfo;
 
+typedef struct NodeGeometryAttributeProximity {
+  /* GeometryNodeAttributeProximityTargetGeometryElement. */
+  uint8_t target_geometry_element;
+
+  char _pad[7];
+} NodeGeometryAttributeProximity;
+
 /* script node mode */
 #define NODE_SCRIPT_INTERNAL 0
 #define NODE_SCRIPT_EXTERNAL 1
@@ -1589,6 +1596,12 @@ typedef enum NodeShaderOutputTarget {
 
 /* Geometry Nodes */
 
+typedef enum GeometryNodeAttributeProximityTargetGeometryElement {
+  GEO_NODE_ATTRIBUTE_PROXIMITY_TARGET_GEOMETRY_ELEMENT_POINTS = 0,
+  GEO_NODE_ATTRIBUTE_PROXIMITY_TARGET_GEOMETRY_ELEMENT_EDGES = 1,
+  GEO_NODE_ATTRIBUTE_PROXIMITY_TARGET_GEOMETRY_ELEMENT_FACES = 2,
+} GeometryNodeAttributeProximityTargetGeometryElement;
+
 /* Boolean Node */
 typedef enum GeometryNodeBooleanOperation {
   GEO_NODE_BOOLEAN_INTERSECT = 0,