Curves: add warning when invalid uv map is used when adding curves

UV maps that are used for surface attachment must not have overlapping
uv islands, because then the same uv coordinate would correspond to
multiple surface positions.

Ref T99936.

1 files changed, 6 insertions, 1 deletions

diff --git a/source/blender/editors/sculpt_paint/curves_sculpt_density.cc b/source/blender/editors/sculpt_paint/curves_sculpt_density.cc
index b07f5c74055..6ad3d0e4aad 100644
--- a/source/blender/editors/sculpt_paint/curves_sculpt_density.cc
+++ b/source/blender/editors/sculpt_paint/curves_sculpt_density.cc
@@ -277,7 +277,12 @@ struct DensityAddOperationExecutor {
     add_inputs.reverse_uv_sampler = &reverse_uv_sampler;
     add_inputs.old_roots_kdtree = self_->original_curve_roots_kdtree_;
 
-    geometry::add_curves_on_mesh(*curves_orig_, add_inputs);
+    const geometry::AddCurvesOnMeshOutputs add_outputs = geometry::add_curves_on_mesh(
+        *curves_orig_, add_inputs);
+
+    if (add_outputs.uv_error) {
+      report_invalid_uv_map(stroke_extension.reports);
+    }
 
     DEG_id_tag_update(&curves_id_orig_->id, ID_RECALC_GEOMETRY);
     WM_main_add_notifier(NC_GEOM | ND_DATA, &curves_id_orig_->id);