[Bf-blender-cvs] [8414e79b71e] temp-pbvh-split: Fix: Crash with empty curves add interpolate points

[Hans Goudey]

Commit: 8414e79b71efaa9735839ed7866692502cae031b
Author: Hans Goudey
Date:   Wed May 11 15:40:19 2022 +0200
Branches: temp-pbvh-split
https://developer.blender.org/rB8414e79b71efaa9735839ed7866692502cae031b

Fix: Crash with empty curves add interpolate points

The neighbors for an added curve can be empty.
In that case use the constant value instead of interpolating.

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

M	source/blender/editors/sculpt_paint/curves_sculpt_add.cc

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

diff --git a/source/blender/editors/sculpt_paint/curves_sculpt_add.cc b/source/blender/editors/sculpt_paint/curves_sculpt_add.cc
index feda57fff1f..f214efb44be 100644
--- a/source/blender/editors/sculpt_paint/curves_sculpt_add.cc
+++ b/source/blender/editors/sculpt_paint/curves_sculpt_add.cc
@@ -608,9 +608,14 @@ struct AddOperationExecutor {
     attribute_math::DefaultMixer<int> mixer{new_offsets};
     threading::parallel_for(neighbors_per_curve.index_range(), 1024, [&](IndexRange curves_range) {
       for (const int i : curves_range) {
-        for (const NeighborInfo &neighbor : neighbors_per_curve[i]) {
-          const int neighbor_points_num = curves_->points_for_curve(neighbor.index).size();
-          mixer.mix_in(i, neighbor_points_num, neighbor.weight);
+        if (neighbors_per_curve[i].is_empty()) {
+          mixer.mix_in(i, constant_points_per_curve_, 1.0f);
+        }
+        else {
+          for (const NeighborInfo &neighbor : neighbors_per_curve[i]) {
+            const int neighbor_points_num = curves_->points_for_curve(neighbor.index).size();
+            mixer.mix_in(i, neighbor_points_num, neighbor.weight);
+          }
         }
       }
     });