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# add_mesh_star.py Copyright (C) 2008-2009, FourMadMen.com
#
# add star to the blender 2.50 add->mesh menu
# ***** BEGIN GPL LICENSE BLOCK *****
#
#
# 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# ***** END GPL LICENCE BLOCK *****
Brendon Murphy
committed
'description': 'Adds a mesh Star to the Add Mesh menu',
'url': 'http://wiki.blender.org/index.php/Extensions:2.5/Py/' \
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from mathutils import Vector, Quaternion
from math import pi
from bpy.props import IntProperty, FloatProperty, BoolProperty
# Stores the values of a list of properties and the
# operator id in a property group ('recall_op') inside the object.
# Could (in theory) be used for non-objects.
# Note: Replaces any existing property group with the same name!
# ob ... Object to store the properties in.
# op ... The operator that should be used.
# op_args ... A dictionary with valid Blender
# properties (operator arguments/parameters).
def store_recall_properties(ob, op, op_args):
if ob and op and op_args:
recall_properties = {}
# Add the operator identifier and op parameters to the properties.
recall_properties['op'] = op.bl_idname
recall_properties['args'] = op_args
# Store new recall properties.
ob['recall'] = recall_properties
# Apply view rotation to objects if "Align To" for
# new objects was set to "VIEW" in the User Preference.
def apply_object_align(context, ob):
obj_align = bpy.context.user_preferences.edit.object_align
if (context.space_data.type == 'VIEW_3D'
and obj_align == 'VIEW'):
view3d = context.space_data
region = view3d.region_3d
viewMatrix = region.view_matrix
rot = viewMatrix.rotation_part()
ob.rotation_euler = rot.invert().to_euler()
# Create a new mesh (object) from verts/edges/faces.
# verts/edges/faces ... List of vertices/edges/faces for the
# new mesh (as used in from_pydata).
# name ... Name of the new mesh (& object).
# edit ... Replace existing mesh data.
# Note: Using "edit" will destroy/delete existing mesh data.
def create_mesh_object(context, verts, edges, faces, name, edit):
scene = context.scene
obj_act = scene.objects.active
# Can't edit anything, unless we have an active obj.
if edit and not obj_act:
return None
# Create new mesh
mesh = bpy.data.meshes.new(name)
# Make a mesh from a list of verts/edges/faces.
mesh.from_pydata(verts, edges, faces)
# Update mesh geometry after adding stuff.
mesh.update()
# Deselect all objects.
bpy.ops.object.select_all(action='DESELECT')
if edit:
# Replace geometry of existing object
# Use the active obj and select it.
ob_new = obj_act
ob_new.selected = True
if obj_act.mode == 'OBJECT':
# Get existing mesh datablock.
old_mesh = ob_new.data
# Set object data to nothing
ob_new.data = None
# Clear users of existing mesh datablock.
old_mesh.user_clear()
# Remove old mesh datablock if no users are left.
if (old_mesh.users == 0):
bpy.data.meshes.remove(old_mesh)
# Assign new mesh datablock.
ob_new.data = mesh
else:
# Create new object
ob_new = bpy.data.objects.new(name, mesh)
# Link new object to the given scene and select it.
scene.objects.link(ob_new)
ob_new.selected = True
# Place the object at the 3D cursor location.
ob_new.location = scene.cursor_location
apply_object_align(context, ob_new)
if obj_act and obj_act.mode == 'EDIT':
if not edit:
# We are in EditMode, switch to ObjectMode.
bpy.ops.object.mode_set(mode='OBJECT')
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# Select the active object as well.
obj_act.selected = True
# Apply location of new object.
scene.update()
# Join new object into the active.
bpy.ops.object.join()
# Switching back to EditMode.
bpy.ops.object.mode_set(mode='EDIT')
ob_new = obj_act
else:
# We are in ObjectMode.
# Make the new object the active one.
scene.objects.active = ob_new
return ob_new
# A very simple "bridge" tool.
# Connects two equally long vertex rows with faces.
# Returns a list of the new faces (list of lists)
#
# vertIdx1 ... First vertex list (list of vertex indices).
# vertIdx2 ... Second vertex list (list of vertex indices).
# closed ... Creates a loop (first & last are closed).
# flipped ... Invert the normal of the face(s).
#
# Note: You can set vertIdx1 to a single vertex index to create
# a fan/star of faces.
# Note: If both vertex idx list are the same length they have
# to have at least 2 vertices.
def createFaces(vertIdx1, vertIdx2, closed=False, flipped=False):
faces = []
if not vertIdx1 or not vertIdx2:
return None
if len(vertIdx1) < 2 and len(vertIdx2) < 2:
return None
fan = False
if (len(vertIdx1) != len(vertIdx2)):
if (len(vertIdx1) == 1 and len(vertIdx2) > 1):
fan = True
else:
return None
total = len(vertIdx2)
if closed:
# Bridge the start with the end.
if flipped:
face = [
vertIdx1[0],
vertIdx2[0],
vertIdx2[total - 1]]
if not fan:
face.append(vertIdx1[total - 1])
faces.append(face)
else:
face = [vertIdx2[0], vertIdx1[0]]
if not fan:
face.append(vertIdx1[total - 1])
face.append(vertIdx2[total - 1])
faces.append(face)
# Bridge the rest of the faces.
for num in range(total - 1):
if flipped:
if fan:
face = [vertIdx2[num], vertIdx1[0], vertIdx2[num + 1]]
else:
face = [vertIdx2[num], vertIdx1[num],
vertIdx1[num + 1], vertIdx2[num + 1]]
faces.append(face)
else:
if fan:
face = [vertIdx1[0], vertIdx2[num], vertIdx2[num + 1]]
else:
face = [vertIdx1[num], vertIdx2[num],
vertIdx2[num + 1], vertIdx1[num + 1]]
faces.append(face)
return faces
def add_star(points, outer_radius, inner_radius, height):
half_height = height / 2.0
vert_idx_top = len(verts)
verts.append(Vector(0.0, 0.0, half_height))
vert_idx_bottom = len(verts)
verts.append(Vector(0.0, 0.0, -half_height))
edgeloop_top = []
edgeloop_bottom = []
for index in range(segments):
quat = Quaternion(z_axis, (index / segments) * PI_2)
if index % 2:
# Uneven
radius = outer_radius
else:
# Even
radius = inner_radius
edgeloop_top.append(len(verts))
vec = Vector(radius, 0, half_height) * quat
verts.append(vec)
faces_top = createFaces([vert_idx_top], edgeloop_top, closed=True)
faces_outside = createFaces(edgeloop_top, edgeloop_bottom, closed=True)
faces_bottom = createFaces([vert_idx_bottom], edgeloop_bottom,
flipped=True, closed=True)
faces.extend(faces_top)
faces.extend(faces_outside)
faces.extend(faces_bottom)
class AddStar(bpy.types.Operator):
'''Add a star mesh.'''
bl_idname = "mesh.primitive_star_add"
bl_label = "Add Star"
bl_options = {'REGISTER', 'UNDO'}
# edit - Whether to add or update.
edit = BoolProperty(name="",
description="",
default=False,
options={'HIDDEN'})
points = IntProperty(name="Points",
description="Number of points for the star",
outer_radius = FloatProperty(name="Outer Radius",
description="Outer radius of the star",
min=0.01,
max=9999.0,
default=1.0)
innter_radius = FloatProperty(name="Inner Radius",
description="Inner radius of the star",
min=0.01,
max=9999.0,
default=0.5)
height = FloatProperty(name="Height",
description="Height of the star",
min=0.01,
max=9999.0,
default=0.5)
props = self.properties
verts, faces = add_star(
props.points,
props.outer_radius,
props.innter_radius,
props.height)
obj = create_mesh_object(context, verts, [], faces, "Star",
props.edit)
# Store 'recall' properties in the object.
recall_args_list = {
"edit": True,
"points": props.points,
"outer_radius": props.outer_radius,
"innter_radius": props.innter_radius,
"height": props.height}
store_recall_properties(obj, self, recall_args_list)
# Register the operator
menu_func = (lambda self, context: self.layout.operator(AddStar.bl_idname,
text="Star", icon='PLUGIN'))
def register():
bpy.types.register(AddStar)
# Add "Star" menu to the "Add Mesh" menu.
bpy.types.INFO_MT_mesh_add.append(menu_func)
def unregister():
bpy.types.unregister(AddStar)
# Remove "Star" menu from the "Add Mesh" menu.
bpy.types.INFO_MT_mesh_add.remove(menu_func)
if __name__ == "__main__":
register()