Geometry Nodes: Attribute Fill Node

This commit adds a node that fills every element of an attribute
with the same value. Currently it supports float, vector, and color
attributes. An immediate use case is for "billboard" scattering.

Currently people are using the same input to a Random Attribute node's
min and max input to fill every element of a vector with the same value,
which is an unintuitive way to accomplish the same thing.

Differential Revision: https://developer.blender.org/D9790

1 files changed, 11 insertions, 0 deletions

diff --git a/source/blender/editors/space_node/drawnode.c b/source/blender/editors/space_node/drawnode.c
index 84e7a74fab3..2ff32a4a82e 100644
--- a/source/blender/editors/space_node/drawnode.c
+++ b/source/blender/editors/space_node/drawnode.c
@@ -3182,6 +3182,14 @@ static void node_geometry_buts_attribute_math(uiLayout *layout,
   uiItemR(layout, ptr, "input_type_b", DEFAULT_FLAGS, IFACE_("Type B"), ICON_NONE);
 }
 
+static void node_geometry_buts_attribute_fill(uiLayout *layout,
+                                              bContext *UNUSED(C),
+                                              PointerRNA *ptr)
+{
+  uiItemR(layout, ptr, "data_type", DEFAULT_FLAGS, "", ICON_NONE);
+  // uiItemR(layout, ptr, "domain", DEFAULT_FLAGS, "", ICON_NONE);
+}
+
 static void node_geometry_set_butfunc(bNodeType *ntype)
 {
   switch (ntype->type) {
@@ -3200,6 +3208,9 @@ static void node_geometry_set_butfunc(bNodeType *ntype)
     case GEO_NODE_ATTRIBUTE_MATH:
       ntype->draw_buttons = node_geometry_buts_attribute_math;
       break;
+    case GEO_NODE_ATTRIBUTE_FILL:
+      ntype->draw_buttons = node_geometry_buts_attribute_fill;
+      break;
   }
 }