[Bf-blender-cvs] [3becd4cb61a] temp-geometry-nodes-fields-prototype: Fix curve parameter field with cyclic poly splines

[Hans Goudey]

Commit: 3becd4cb61a79cbcfd40b3744237e3ea2b0cff5c
Author: Hans Goudey
Date:   Tue Aug 10 10:56:17 2021 -0500
Branches: temp-geometry-nodes-fields-prototype
https://developer.blender.org/rB3becd4cb61a79cbcfd40b3744237e3ea2b0cff5c

Fix curve parameter field with cyclic poly splines

===================================================================

M	source/blender/nodes/geometry/node_geometry_util.cc

===================================================================

diff --git a/source/blender/nodes/geometry/node_geometry_util.cc b/source/blender/nodes/geometry/node_geometry_util.cc
index a9868e772dd..17f614fa86b 100644
--- a/source/blender/nodes/geometry/node_geometry_util.cc
+++ b/source/blender/nodes/geometry/node_geometry_util.cc
@@ -189,7 +189,12 @@ void prepare_field_inputs(bke::FieldInputs &field_inputs,
             break;
           }
           case Spline::Type::Poly: {
-            spline_parameters.drop_front(1).copy_from(lengths_eval);
+            if (spline.is_cyclic()) {
+              spline_parameters.drop_front(1).copy_from(lengths_eval.drop_back(1));
+            }
+            else {
+              spline_parameters.drop_front(1).copy_from(lengths_eval);
+            }
             break;
           }
           case Spline::Type::NURBS: {