`# ##### BEGIN GPL LICENSE BLOCK #####
Slope2vcol.py , a Blender addon
(c) 2013 Michel J. Anders (varkenvarken)
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
##### END GPL LICENSE BLOCK
bl_info = {
"name": "Slope2vgroup",
"author": "Michel Anders (varkenvarken), updated to 2.8 by bay raitt",
"version": (0, 0, 1),
"blender": (2, 80, 0),
"location": "View3D > Object > Slope",
"description": "Replace active vertex group with weights representing the slope of a vertex",
"warning": "",
"wiki_url": "",
"tracker_url": "",
"category": "Mesh"}
import bpy
from mathutils import Vector
from math import pi
class BR_OT_Slope2VGroup(bpy.types.Operator):
"""Generate Slope Weights"""
bl_idname = "mesh.slope2vgroup"
bl_label = "Generate Slope Weights"
bl_options = {'REGISTER', 'UNDO'}
@classmethod
def poll(self, context):
p = (context.mode == 'OBJECT' and
isinstance(bpy.context.view_layer.objects.active, bpy.types.Object) and
isinstance(bpy.context.view_layer.objects.active, bpy.types.Mesh))
return p
def execute(self, context):
ob = context.active_object
vertex_group = ob.vertex_groups.active
if vertex_group is None:
bpy.ops.object.vertex_group_add()
vertex_group = ob.vertex_groups.active
mesh = ob.data
for v in mesh.vertices:
angle = 1 - v.normal.angle(Vector((0, 0, 1))) / pi
vertex_group.add([v.index], angle, 'REPLACE')
layer = bpy.context.view_layer
layer.update()
return {'FINISHED'}
def menu_draw(self, context):
self.layout.operator(BR_OT_Slope2VGroup.bl_idname, icon='PLUGIN')
def register():
bpy.utils.register_class(BR_OT_Slope2VGroup)
bpy.types.MESH_MT_vertex_group_context_menu.append(menu_draw)
def unregister():
bpy.utils.unregister_class(BR_OT_Slope2VGroup)
bpy.types.MESH_MT_vertex_group_context_menu.remove(menu_draw)
if __name__ != "__main__":
bpy.types.MESH_MT_vertex_group_context_menu.remove(menu_draw)
if name == "main":
register()
`