I tried simple approaches like:
import bpy
import bmesh
def merge_vertices_and_uv_stitch():
# Make sure we're in Edit Mode and Vertex Select Mode
bpy.ops.object.mode_set(mode='EDIT')
bpy.ops.mesh.select_mode(type="VERT")
# Get the active mesh
obj = bpy.context.edit_object
me = obj.data
bm = bmesh.from_edit_mesh(me)
# Merge selected vertices at center
bpy.ops.mesh.merge(type='CENTER')
# Update the mesh
bmesh.update_edit_mesh(me)
# Apply SHIFT+V (Stitch) operation in UV space
bpy.ops.uv.stitch()
# Update the mesh again
bmesh.update_edit_mesh(me)
# Run the function
merge_vertices_and_uv_stitch()
And even more abstract ideas like this which makes things weird:
import bpy
import bmesh
def merge_vertices_preserve_uvs():
# Make sure we're in Edit Mode and Vertex Select Mode
bpy.ops.object.mode_set(mode='EDIT')
bpy.ops.mesh.select_mode(type="VERT")
# Get the active mesh
obj = bpy.context.edit_object
me = obj.data
bm = bmesh.from_edit_mesh(me)
# Ensure UV layers are available
if not bm.loops.layers.uv:
return
uv_layer = bm.loops.layers.uv.verify()
# Store original UV coordinates
original_uvs = {}
for face in bm.faces:
for loop in face.loops:
if loop.vert.select:
original_uvs[loop.vert.index] = loop[uv_layer].uv.copy()
# Merge selected vertices at center
bpy.ops.mesh.merge(type='CENTER')
# Update the mesh
bmesh.update_edit_mesh(me)
# Restore original UV coordinates
for face in bm.faces:
for loop in face.loops:
if loop.vert.index in original_uvs:
loop[uv_layer].uv = original_uvs[loop.vert.index]
# Final update
bmesh.update_edit_mesh(me)
# Run the function
merge_vertices_preserve_uvs()
No luck until now :(
Example of the kind of gap I mean:
