Geometry Nodes: Support custom instance attributes

Adds an attribute provider for instance attributes.
A new domain `ATTR_DOMAIN_INSTANCE` is implemented.
Instance attributes are not yet realized correctly.

Differential Revision: D13149

1 files changed, 3 insertions, 0 deletions

diff --git a/source/blender/makesrna/intern/rna_attribute.c b/source/blender/makesrna/intern/rna_attribute.c
index dbf20896463..78c15444308 100644
--- a/source/blender/makesrna/intern/rna_attribute.c
+++ b/source/blender/makesrna/intern/rna_attribute.c
@@ -72,6 +72,7 @@ const EnumPropertyItem rna_enum_attribute_domain_items[] = {
     /* Not implement yet */
     // {ATTR_DOMAIN_GRIDS, "GRIDS", 0, "Grids", "Attribute on mesh multires grids"},
     {ATTR_DOMAIN_CURVE, "CURVE", 0, "Spline", "Attribute on spline"},
+    {ATTR_DOMAIN_INSTANCE, "INSTANCE", 0, "Instance", "Attribute on instance"},
     {0, NULL, 0, NULL, NULL},
 };
 
@@ -80,6 +81,7 @@ const EnumPropertyItem rna_enum_attribute_domain_without_corner_items[] = {
     {ATTR_DOMAIN_EDGE, "EDGE", 0, "Edge", "Attribute on mesh edge"},
     {ATTR_DOMAIN_FACE, "FACE", 0, "Face", "Attribute on mesh faces"},
     {ATTR_DOMAIN_CURVE, "CURVE", 0, "Spline", "Attribute on spline"},
+    {ATTR_DOMAIN_INSTANCE, "INSTANCE", 0, "Instance", "Attribute on instance"},
     {0, NULL, 0, NULL, NULL},
 };
 
@@ -90,6 +92,7 @@ const EnumPropertyItem rna_enum_attribute_domain_with_auto_items[] = {
     {ATTR_DOMAIN_FACE, "FACE", 0, "Face", "Attribute on mesh faces"},
     {ATTR_DOMAIN_CORNER, "CORNER", 0, "Face Corner", "Attribute on mesh face corner"},
     {ATTR_DOMAIN_CURVE, "CURVE", 0, "Spline", "Attribute on spline"},
+    {ATTR_DOMAIN_INSTANCE, "INSTANCE", 0, "Instance", "Attribute on instance"},
     {0, NULL, 0, NULL, NULL},
 };