Add support for a longest diagonal quad triangulation mode

The new triangulation mode for quads is the opposite of the current default
shortest diagonal mode. It is optimal for cloth simulations using quad meshes.

Differential Revision: http://developer.blender.org/D13777

2 files changed, 12 insertions, 2 deletions

diff --git a/source/blender/makesrna/intern/rna_modifier.c b/source/blender/makesrna/intern/rna_modifier.c
index d46ae13b482..0f0734c8448 100644
--- a/source/blender/makesrna/intern/rna_modifier.c
+++ b/source/blender/makesrna/intern/rna_modifier.c
@@ -331,7 +331,12 @@ const EnumPropertyItem rna_enum_modifier_triangulate_quad_method_items[] = {
      "SHORTEST_DIAGONAL",
      0,
      "Shortest Diagonal",
-     "Split the quads based on the distance between the vertices"},
+     "Split the quads along their shortest diagonal"},
+    {MOD_TRIANGULATE_QUAD_LONGEDGE,
+     "LONGEST_DIAGONAL",
+     0,
+     "Longest Diagonal",
+     "Split the quads along their longest diagonal"},
     {0, NULL, 0, NULL, NULL},
 };
 
diff --git a/source/blender/makesrna/intern/rna_nodetree.c b/source/blender/makesrna/intern/rna_nodetree.c
index e7307e6e058..ecbeadf1fa4 100644
--- a/source/blender/makesrna/intern/rna_nodetree.c
+++ b/source/blender/makesrna/intern/rna_nodetree.c
@@ -9488,7 +9488,12 @@ static void def_geo_triangulate(StructRNA *srna)
        "SHORTEST_DIAGONAL",
        0,
        "Shortest Diagonal",
-       "Split the quads based on the distance between the vertices"},
+       "Split the quads along their shortest diagonal"},
+      {GEO_NODE_TRIANGULATE_QUAD_LONGEDGE,
+       "LONGEST_DIAGONAL",
+       0,
+       "Longest Diagonal",
+       "Split the quads along their longest diagonal"},
       {0, NULL, 0, NULL, NULL},
   };