new script seams from islands, adds seams at the boundries of existing UV islands.

uvcalc_smart_project - needed to import Main

release/scripts/uv_seams_from_islands.py

@@ -0,0 +1,78 @@
+#!BPY
+"""
+Name: 'Seams from Islands'
+Blender: 243
+Group: 'UV'
+Tooltip: 'Add seams onto the mesh at the bounds of UV islands'
+"""
+
+# Add a licence here if you wish to re-distribute, we recommend the GPL
+
+from Blender import Scene, Mesh, Window, sys
+import BPyMessages
+
+def seams_from_islands(me):
+	# This function runs out of editmode with a mesh
+	# error cases are alredy checked for
+	
+	# next intex 
+	wrap_q = [1,2,3,0]
+	wrap_t = [1,2,0]
+	edge_uvs = {}
+	for f in me.faces:
+		f_uv = [(round(uv.x, 6), round(uv.y, 6)) for uv in f.uv]
+		f_vi = [v.index for v in f]
+		for i, key in enumerate(f.edge_keys):
+			if len(f)==3:
+				uv1, uv2 = f_uv[i], f_uv[wrap_t[i]]
+				vi1, vi2 = f_vi[i], f_vi[wrap_t[i]]
+			else: # quad
+				uv1, uv2 = f_uv[i], f_uv[wrap_q[i]]
+				vi1, vi2 = f_vi[i], f_vi[wrap_q[i]]
+				
+			if vi1 > vi2: uv1,uv2 = uv2,uv1
+			
+			edge_uvs.setdefault(key, []).append((uv1, uv2))
+	
+	# add seams
+	SEAM = Mesh.EdgeFlags.SEAM
+	for ed in me.edges:
+		print len(set(edge_uvs[ed.key]))
+		if len(set(edge_uvs[ed.key])) > 1:
+			ed.flag |= SEAM
+
+def main():
+	
+	# Gets the current scene, there can be many scenes in 1 blend file.
+	sce = Scene.GetCurrent()
+	
+	# Get the active object, there can only ever be 1
+	# and the active object is always the editmode object.
+	ob_act = sce.objects.active
+	me = ob_act.getData(mesh=1)
+	
+	if not ob_act or ob_act.type != 'Mesh' or not me.faceUV:
+		BPyMessages.Error_NoMeshUvActive()
+		return 
+	
+	# Saves the editmode state and go's out of 
+	# editmode if its enabled, we cant make
+	# changes to the mesh data while in editmode.
+	is_editmode = Window.EditMode()
+	if is_editmode: Window.EditMode(1)
+	
+	Window.WaitCursor(1)
+	
+	t = sys.time()
+	
+	# Run the mesh editing function
+	seams_from_islands(me)
+	
+	# Timing the script is a good way to be aware on any speed hits when scripting
+	print 'My Script finished in %.2f seconds' % (sys.time()-t)
+	Window.WaitCursor(0)
+	
+	
+# This lets you can import the script without running it
+if __name__ == '__main__':
+	main()

release/scripts/uvcalc_smart_project.py

@@ -42,7 +42,7 @@ selected faces, or all faces.
 # -------------------------------------------------------------------------- 
 
 
-from Blender import Object, Draw, Window, sys, Mesh, Geometry
+from Blender import Object, Draw, Window, sys, Mesh, Geometry, Main
 from Blender.Mathutils import CrossVecs, Matrix, Vector, RotationMatrix, DotVecs
 
 from math import cos