boxespy/flexbox.py

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#!/usr/bin/python3
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# Copyright (C) 2013-2014 Florian Festi
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
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import boxes
import math
class FlexBox(boxes.Boxes):
"""Box with living hinge and round corners"""
def __init__(self):
boxes.Boxes.__init__(self)
self.buildArgParser("x", "y", "h")
self.argparser.add_argument(
"--radius", action="store", type=float, default=15,
help="Radius of the latch in mm")
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@boxes.restore
def flexBoxSide(self, x, y, r, callback=None):
self.moveTo(r, 0)
for i, l in zip(range(2), (x, y)):
self.cc(callback, i)
self.fingerJointEdge(l-2*r)
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self.corner(90, r)
self.cc(callback, 2)
self.edge(x-2*r)
self.corner(90, r)
self.cc(callback, 3)
self.latch(self.latchsize)
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self.cc(callback, 4)
self.fingerJointEdge(y-2*r-self.latchsize)
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self.corner(90, r)
def surroundingWall(self):
x, y, h, r = self.x, self.y, self.h, self.radius
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c4 = math.pi * r * 0.5
self.edges["F"](y-2*r-self.latchsize, False)
self.flexEdge(c4, h+2*self.thickness)
self.edges["F"](x-2*r, False)
self.flexEdge(c4, h+2*self.thickness)
self.edges["F"](y-2*r, False)
self.flexEdge(c4, h+2*self.thickness)
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self.edge(x-2*r)
self.flexEdge(c4, h+2*self.thickness)
self.latch(self.latchsize, False)
self.edge(h+2*self.thickness)
self.latch(self.latchsize, False, True)
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self.edge(c4)
self.edge(x-2*r)
self.edge(c4)
self.edges["F"](y-2*r, False)
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self.edge(c4)
self.edges["F"](x-2*r, False)
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self.edge(c4)
self.edges["F"](y-2*r-self.latchsize, False)
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self.corner(90)
self.edge(h+2*self.thickness)
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self.corner(90)
def render(self):
x, y, h = self.x, self.y, self.h
r = self.radius or min(x, y)/2.0
self.latchsize = 8 * self.thickness
c4 = math.pi * r * 0.5
width = 2*x + 2*y - 8*r + 4*c4 + 4*self.thickness
height = y + h + 8*self.thickness
self.open(width, height)
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self.moveTo(self.thickness, self.thickness)
self.surroundingWall()
self.moveTo(self.thickness, self.h+5*self.thickness)
self.flexBoxSide(self.x, self.y, self.radius)
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self.moveTo(2*self.x+3*self.thickness, 0)
self.ctx.scale(-1, 1)
self.flexBoxSide(self.x, self.y, self.radius)
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self.close()
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if __name__=="__main__":
b = FlexBox()
b.parseArgs()
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b.render()