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slope2vgroup.py

slope2vgroup.py

# ##### 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 #####
# <pep8 compliant>
bl_info = {
"name": "Slope2vgroup",
"author": "Michel Anders (varkenvarken)",
"version": (0, 0, 1),
"blender": (2, 68, 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 Slope2VGroup(bpy.types.Operator):
bl_idname = "mesh.slope2vgroup"
bl_label = "Slope2VGroup"
bl_options = {'REGISTER', 'UNDO'}
@classmethod
def poll(self, context):
p = (context.mode == 'OBJECT' and
isinstance(context.scene.objects.active, bpy.types.Object) and
isinstance(context.scene.objects.active.data, 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')
context.scene.update()
return {'FINISHED'}
def menu_func(self, context):
self.layout.operator(Slope2VGroup.bl_idname, text=bl_info['description'],
icon='PLUGIN')
def register():
bpy.utils.register_module(__name__)
bpy.types.VIEW3D_MT_object.append(menu_func)
def unregister():
bpy.types.IVIEW3D_MT_object.remove(menu_func)
bpy.utils.unregister_module(__name__)

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