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April 30, 2013 14:11
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# ##### 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | |
# | |
# ##### END GPL LICENSE BLOCK ##### | |
bl_info = { | |
"name": "Spring Coil", | |
"author": "Dealga McArdle", | |
"version": (0, 1, 0), | |
"blender": (2, 6, 7), | |
"location": "View3D > Add > Mesh > blaa", | |
"description": "Add a coil/spring", | |
"warning": "", | |
"wiki_url": "", | |
"tracker_url": "", | |
"category": "Add Mesh"} | |
import bpy | |
from bpy.props import * | |
from math import sin, cos, radians, pi, atan2 | |
from mathutils import Vector, Euler | |
def make_coil(self): | |
# variables | |
amp = self.profile_radius | |
n_verts = self.num_verts | |
n_turns = self.num_turns | |
th = self.height / n_turns | |
ipt = self.iterations_per_turn | |
radius = self.coil_radius | |
diameter = radius * 2 | |
section_angle = 360.0 / n_verts | |
rad_slice = 2.0 * pi / ipt | |
total_segments = (ipt * n_turns) + 1 | |
z_jump = self.height / total_segments | |
x_rotation = atan2(th/2, diameter) | |
n = n_verts | |
Verts = [] | |
for segment in range(total_segments): | |
rad_angle = rad_slice * segment | |
for i in range(n): | |
# create the vector | |
this_angle = section_angle * i | |
x_float = amp * sin(radians( this_angle )) + radius | |
z_float = amp * cos(radians( this_angle )) | |
v1 = Vector((x_float, 0.0, z_float)) | |
# rotate it | |
some_euler = Euler((-x_rotation, 0.0, -rad_angle), 'XYZ') | |
v1.rotate(some_euler) | |
# add extra z height per segment | |
v1 += Vector((0, 0, (segment * z_jump))) | |
# append it | |
Verts.append(v1) | |
Faces = [] | |
# skin it, normals facing outwards | |
for t in range(total_segments-1): | |
for i in range(n-1): | |
p0 = i + (n*t) | |
p1 = i + (n*t) + 1 | |
p2 = i + (n*t + n) + 1 | |
p3 = i + (n*t + n) | |
Faces.append([p3,p2,p1,p0]) | |
p0 = n*t | |
p1 = n*t + n | |
p2 = n*t + (2 * n) - 1 | |
p3 = n*t + n-1 | |
Faces.append([p3,p2,p1,p0]) | |
return Verts, Faces | |
def create_mesh_object(context, verts, edges, faces, name): | |
mesh = bpy.data.meshes.new(name) | |
mesh.from_pydata(verts, edges, faces) | |
mesh.update() | |
from bpy_extras import object_utils | |
return object_utils.object_data_add(context, mesh, operator=None) | |
class AddSpringObject(bpy.types.Operator): | |
bl_idname = "mesh.spring_add" | |
bl_label = "Add Spring" | |
bl_options = {'REGISTER', 'UNDO', 'PRESET'} | |
num_verts = IntProperty(name="num profile verts", | |
description="how many verts in profile shape", | |
default=12, min=3, max=30) | |
profile_radius = FloatProperty(name="profile radius", | |
description="Radius of profile shape", | |
default=1.0, min=0.001, max=20.0) | |
coil_radius = FloatProperty(name="coil radius", | |
description="Coil radius measured from center of profile shape", | |
default=4.0, min=0.001, max=20.0) | |
iterations_per_turn = IntProperty(name="num segments per turn", | |
description="how many profile segments per turn", | |
default=20, min=4, max=30) | |
num_turns = IntProperty(name="total turns in coil", | |
description="how many turns in coil", | |
default=4, min=1, max=30) | |
height = FloatProperty(name="coil height", | |
description="Coil height measured from first to last profile centers.", | |
default=8.0, min=2.0, max=20.0) | |
def execute(self, context): | |
verts, faces = make_coil(self) | |
base = create_mesh_object(context, verts, [], faces, "Spring") | |
return {'FINISHED'} | |
def menu_func(self, context): | |
self.layout.operator("mesh.spring_add", icon="PLUGIN") | |
def register(): | |
bpy.utils.register_module(__name__) | |
bpy.types.INFO_MT_mesh_add.append(menu_func) | |
def unregister(): | |
bpy.utils.unregister_module(__name__) | |
bpy.types.INFO_MT_mesh_add.remove(menu_func) | |
if __name__ == "__main__": | |
register() |
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