add_mesh_star.py

# 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 *****

# blender Extensions menu registration (in user Prefs)
"Add Star (View3D > Add > Mesh > Star)"

"""
Name: 'Star'
Blender: 250
Group: 'AddMesh'
Tip: 'Add Star Object...'
__author__ = ["Four Mad Men", "FourMadMen.com"]
__version__ = '2.00'
__url__ = [
	"Script, http://www.fourmadmen.com/blender/scripts/AddMesh/star/add_mesh_star.py", 
	"Script Index, http://www.fourmadmen.com/blender/scripts/index.html", 
	"Author Site , http://www.fourmadmen.com"
]
email__=["bwiki {at} fourmadmen {dot} com"]


Usage:

* Launch from Add Mesh menu

* Modify parameters as desired or keep defaults

"""

import bpy
import Mathutils
from math import pi

def add_star(points, outer_radius, inner_radius, depth):
	Vector = Mathutils.Vector
	Quaternion = Mathutils.Quaternion
	
	PI_2 = pi * 2
	z_axis = (0, 0, 1)

	verts = []
	faces = []
	
	segments = points * 2
	tot_verts = segments * 2 + 2
	
	half_height = depth * .5
	
	verts.extend( Vector(0, 0, -half_height) )
	verts.extend( Vector(0, 0, half_height) )
	
	i = 2
	alt_idx = 0
	for index in range(segments):
		quat = Quaternion(z_axis, (index / segments) * PI_2)
		
		radius = alt_idx and inner_radius or outer_radius
		
		vec = Vector(radius, 0, -half_height) * quat
		verts.extend([vec.x, vec.y, vec.z])
		it1 = i
		i+=1
		
		vec = Vector(radius, 0, half_height) * quat
		verts.extend([vec.x, vec.y, vec.z])
		ib1 = i
		i+=1
		
		if i>4:
			faces.extend( [0, it1-2, it1, 0] )
			faces.extend( [it1, it1-2, ib1-2, ib1] )
			faces.extend( [1, ib1, ib1-2, 1] )
					
		alt_idx = 1 - alt_idx
		
	faces.extend( [0, it1, 2, 0] )
	faces.extend( [2, it1, ib1, 3] )
	faces.extend( [1, 3, ib1, 1] )
	
	return verts, faces

from bpy.props import IntProperty, FloatProperty

class AddStar(bpy.types.Operator):
	'''Add a star mesh.'''
	bl_idname = "mesh.primitive_star_add"
	bl_label = "Add Star"
	bl_options = {'REGISTER', 'UNDO'}

	points = IntProperty(name="Points",
		description="Number of points for the star",
		default=5, min=2, max=256)
	outer_radius = FloatProperty(name="Outer Radius",
		description="Outer radius of the star",
		default=1.0, min=0.01, max=100.0)
	innter_radius = FloatProperty(name="Inner Radius",
		description="Inner radius of the star",
		default=0.5, min=0.01, max=100.0)
	depth = FloatProperty(name="Depth",
		description="Depth of the star",
		default=0.5, min=0.01, max=100.0)

	def execute(self, context):
    
		verts_loc, faces = add_star(self.properties.points,
			self.properties.outer_radius,
			self.properties.innter_radius,
			self.properties.depth)

		mesh = bpy.data.meshes.new("Star")
		
		mesh.add_geometry(int(len(verts_loc) / 3), 0, int(len(faces) / 4))
		mesh.verts.foreach_set("co", verts_loc)
		mesh.faces.foreach_set("verts_raw", faces)
		
		scene = context.scene

		# ugh
		for ob in scene.objects:
			ob.selected = False

		mesh.update()
		
		ob_new = bpy.data.objects.new("Star", mesh)
		ob_new.data = mesh
		scene.objects.link(ob_new)
		scene.objects.active = ob_new
		ob_new.selected = True
		
		ob_new.location = tuple(context.scene.cursor_location)
		
		return {'FINISHED'}

# Register the operator
# Add to a menu, reuse an icon used elsewhere that happens to have fitting name
# unfortunately, the icon shown is the one I expected from looking at the
# blenderbuttons file from the release/datafiles directory

menu_func = (lambda self, context: self.layout.operator(AddStar.bl_idname,
                                        text="Star", icon='PLUGIN'))

def register():
    bpy.types.register(AddStar)
    bpy.types.INFO_MT_mesh_add.append(menu_func)

def unregister():
    bpy.types.unregister(AddStar)
    bpy.types.INFO_MT_mesh_add.remove(menu_func)
	
	    # Remove "Star" menu from the "Add Mesh" menu.
    #space_info.INFO_MT_mesh_add.remove(menu_func)

if __name__ == "__main__":
    register()