Geometry Noes: Curve Resample Node

This node generates a naturally parametarized (even length edge) poly
spline version of every spline in the input. There are two modes,
"Count", and "Length". These are similar to the same options for the
line primitive node in end points mode.

I implemented this instead of a "Sample Points" node, because for this
operation it's trivial to keep the result as a curve, which is nice
since it increases flexibility, and because it can make instancing
simpler, i.e. using the transforms of each evaluated point rather than
requiring the construction of a "rotation" attribute.

Differential Revision: https://developer.blender.org/D11173

1 files changed, 27 insertions, 0 deletions

diff --git a/source/blender/makesrna/intern/rna_nodetree.c b/source/blender/makesrna/intern/rna_nodetree.c
index 293c43a93e7..58553a4d1f1 100644
--- a/source/blender/makesrna/intern/rna_nodetree.c
+++ b/source/blender/makesrna/intern/rna_nodetree.c
@@ -9744,6 +9744,33 @@ static void def_geo_switch(StructRNA *srna)
   RNA_def_property_update(prop, NC_NODE | NA_EDITED, "rna_Node_socket_update");
 }
 
+static void def_geo_curve_resample(StructRNA *srna)
+{
+  PropertyRNA *prop;
+
+  static EnumPropertyItem mode_items[] = {
+      {GEO_NODE_CURVE_SAMPLE_COUNT,
+       "COUNT",
+       0,
+       "Count",
+       "Sample the specified number of points along each spline"},
+      {GEO_NODE_CURVE_SAMPLE_LENGTH,
+       "LENGTH",
+       0,
+       "Length",
+       "Calculate the number of samples by splitting each spline into segments with the specified "
+       "length"},
+      {0, NULL, 0, NULL, NULL},
+  };
+
+  RNA_def_struct_sdna_from(srna, "NodeGeometryCurveResample", "storage");
+
+  prop = RNA_def_property(srna, "mode", PROP_ENUM, PROP_NONE);
+  RNA_def_property_enum_items(prop, mode_items);
+  RNA_def_property_ui_text(prop, "Mode", "How to specify the amount of samples");
+  RNA_def_property_update(prop, NC_NODE | NA_EDITED, "rna_Node_socket_update");
+}
+
 static void def_geo_attribute_transfer(StructRNA *srna)
 {
   static EnumPropertyItem mapping_items[] = {