Modifier: New Weld Modifier

Part of T70240

This is the initial implementation of Weld Modifier.
New features will be added later.

ToDo:
- Seams: restrict welding to vertices along boundary edges.
- Edge Collapse: collapse edges below the length threshold.
- New icon.
- Some customdata are not being correctly interpolated.

Differential Revision: https://developer.blender.org/D6383

1 files changed, 11 insertions, 0 deletions

diff --git a/source/blender/makesdna/DNA_modifier_types.h b/source/blender/makesdna/DNA_modifier_types.h
index a8db46238d8..0ed9a7f3e5e 100644
--- a/source/blender/makesdna/DNA_modifier_types.h
+++ b/source/blender/makesdna/DNA_modifier_types.h
@@ -86,6 +86,7 @@ typedef enum ModifierType {
   eModifierType_MeshSequenceCache = 52,
   eModifierType_SurfaceDeform = 53,
   eModifierType_WeightedNormal = 54,
+  eModifierType_Weld = 55,
   NUM_MODIFIER_TYPES,
 } ModifierType;
 
@@ -1810,6 +1811,16 @@ enum {
   MOD_WIREFRAME_CREASE = (1 << 5),
 };
 
+typedef struct WeldModifierData {
+  ModifierData modifier;
+
+  /* the limit below which to merge vertices in adjacent duplicates */
+  float merge_dist;
+  unsigned int max_interactions;
+  /** Name of vertex group to use to mask, MAX_VGROUP_NAME. */
+  char defgrp_name[64];
+} WeldModifierData;
+
 typedef struct DataTransferModifierData {
   ModifierData modifier;