Geometry Nodes: new Attribute Sample Texture node

This node allows sampling a texture for every vertex based on some
mapping attribute. Typical attribute names are the name of a uv map
(e.g. "UVMap") and "position". However, every attribute that can be
converted to a vector implicitly is supported.

It should be noted that as of right now, uv map attributes can only be
accessed after a Point Distribute node.

Ref T82584.

Differential Revision: https://developer.blender.org/D10121

3 files changed, 5 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_attribute_access.hh b/source/blender/blenkernel/BKE_attribute_access.hh
index abcf8ed1c54..bca96aac665 100644
--- a/source/blender/blenkernel/BKE_attribute_access.hh
+++ b/source/blender/blenkernel/BKE_attribute_access.hh
@@ -24,6 +24,7 @@
 #include "BKE_attribute.h"
 
 #include "BLI_color.hh"
+#include "BLI_float2.hh"
 #include "BLI_float3.hh"
 
 namespace blender::bke {
@@ -301,11 +302,13 @@ template<typename T> class TypedWriteAttribute {
 
 using BooleanReadAttribute = TypedReadAttribute<bool>;
 using FloatReadAttribute = TypedReadAttribute<float>;
+using Float2ReadAttribute = TypedReadAttribute<float2>;
 using Float3ReadAttribute = TypedReadAttribute<float3>;
 using Int32ReadAttribute = TypedReadAttribute<int>;
 using Color4fReadAttribute = TypedReadAttribute<Color4f>;
 using BooleanWriteAttribute = TypedWriteAttribute<bool>;
 using FloatWriteAttribute = TypedWriteAttribute<float>;
+using Float2WriteAttribute = TypedWriteAttribute<float2>;
 using Float3WriteAttribute = TypedWriteAttribute<float3>;
 using Int32WriteAttribute = TypedWriteAttribute<int>;
 using Color4fWriteAttribute = TypedWriteAttribute<Color4f>;
diff --git a/source/blender/blenkernel/BKE_node.h b/source/blender/blenkernel/BKE_node.h
index 6ab401a2d41..12266cd48d9 100644
--- a/source/blender/blenkernel/BKE_node.h
+++ b/source/blender/blenkernel/BKE_node.h
@@ -1361,6 +1361,7 @@ int ntreeTexExecTree(struct bNodeTree *ntree,
 #define GEO_NODE_ALIGN_ROTATION_TO_VECTOR 1018
 #define GEO_NODE_POINT_TRANSLATE 1019
 #define GEO_NODE_POINT_SCALE 1020
+#define GEO_NODE_ATTRIBUTE_SAMPLE_TEXTURE 1021
 
 /** \} */
 
diff --git a/source/blender/blenkernel/intern/node.c b/source/blender/blenkernel/intern/node.c
index 52de4b108b9..04ce43da502 100644
--- a/source/blender/blenkernel/intern/node.c
+++ b/source/blender/blenkernel/intern/node.c
@@ -4747,6 +4747,7 @@ static void registerGeometryNodes(void)
   register_node_type_geo_attribute_color_ramp();
   register_node_type_geo_point_rotate();
   register_node_type_geo_align_rotation_to_vector();
+  register_node_type_geo_sample_texture();
 }
 
 static void registerFunctionNodes(void)