scripts/startup/bl_operators/uvcalc_follow_active.py

@@ -6,6 +6,7 @@ from bpy.types import Operator
 
 from bpy.props import (
     EnumProperty,
+    BoolProperty,
 )
 
 STATUS_OK = (1 << 0)
@@ -16,7 +17,7 @@ STATUS_ERR_MISSING_UV_LAYER = (1 << 4)
 STATUS_ERR_NO_FACES_SELECTED = (1 << 5)
 
 
-def extend(obj, EXTEND_MODE, use_uv_selection):
+def extend(obj, EXTEND_MODE, use_uv_selection, rip_modified_quads):
     import bmesh
     from .uvcalc_transform import is_face_uv_selected
 
@@ -205,13 +206,14 @@ def extend(obj, EXTEND_MODE, use_uv_selection):
     for f_triple in walk_face():
         apply_uv(*f_triple)
 
-    # Propagate UV changes across boundary of selection.
-    for (v, original_uv, source) in uv_updates:
-        # Visit all loops associated with our vertex.
-        for loop in v.link_loops:
-            # If the loop's UV matches the original, assign the new UV.
-            if loop[uv_act].uv == original_uv:
-                loop[uv_act].uv = source
+    if not rip_modified_quads:
+        # Propagate UV changes across boundary of selection.
+        for (v, original_uv, source) in uv_updates:
+            # Visit all loops associated with our vertex.
+            for loop in v.link_loops:
+                # If the loop's UV matches the original, assign the new UV.
+                if loop[uv_act].uv == original_uv:
+                    loop[uv_act].uv = source
 
     bmesh.update_edit_mesh(me, loop_triangles=False)
     return STATUS_OK
@@ -230,7 +232,7 @@ def main(context, operator):
     for ob in ob_list:
         num_meshes += 1
 
-        ret = extend(ob, operator.properties.mode, use_uv_selection)
+        ret = extend(ob, operator.properties.mode, use_uv_selection, operator.properties.rip_modified_quads)
         if ret != STATUS_OK:
             num_errors += 1
             status |= ret
@@ -264,6 +266,13 @@ class FollowActiveQuads(Operator):
             ('LENGTH_AVERAGE', "Length Average", "Average space UVs edge length of each loop"),
         ),
         default='LENGTH_AVERAGE',
+        
+    )
+
+    rip_modified_quads: BoolProperty(
+        name="Rip Modified UVs",
+        description="Disconnect modified UV quads from their neighbors",
+        default=True,
     )
 
     @classmethod