Geometry Nodes: Add preferred domain to many field inputs

The preferred domain is used to decide which domain the viewer node
should use when set to "Auto" domain. This commit adds it to some curve
input nodes and the curve and mesh topology nodes. This makes debugging
node setups with these nodes a bit faster and less frustrating.

1 files changed, 10 insertions, 0 deletions

diff --git a/source/blender/nodes/geometry/nodes/node_geo_curve_topology_curve_of_point.cc b/source/blender/nodes/geometry/nodes/node_geo_curve_topology_curve_of_point.cc
index 4d60ab939ca..d442a8823cb 100644
--- a/source/blender/nodes/geometry/nodes/node_geo_curve_topology_curve_of_point.cc
+++ b/source/blender/nodes/geometry/nodes/node_geo_curve_topology_curve_of_point.cc
@@ -48,6 +48,11 @@ class CurveOfPointInput final : public bke::CurvesFieldInput {
     }
     return false;
   }
+
+  std::optional<eAttrDomain> preferred_domain(const bke::CurvesGeometry & /*curves*/)const final
+  {
+    return ATTR_DOMAIN_POINT;
+  }
 };
 
 class PointIndexInCurveInput final : public bke::CurvesFieldInput {
@@ -86,6 +91,11 @@ class PointIndexInCurveInput final : public bke::CurvesFieldInput {
     }
     return false;
   }
+
+  std::optional<eAttrDomain> preferred_domain(const bke::CurvesGeometry & /*curves*/)
+  {
+    return ATTR_DOMAIN_POINT;
+  }
 };
 
 static void node_geo_exec(GeoNodeExecParams params)