Source code for boxes.generators.flexbox

#!/usr/bin/env python3
# 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/>.

import boxes
import math


[docs]class FlexBox(boxes.Boxes): """Box with living hinge and round corners""" ui_group = "FlexBox" def __init__(self): boxes.Boxes.__init__(self) self.addSettingsArgs(boxes.edges.FingerJointSettings) self.addSettingsArgs(boxes.edges.FlexSettings) self.buildArgParser("x", "y", "h", "outside") self.argparser.add_argument( "--radius", action="store", type=float, default=15, help="Radius of the latch in mm") self.argparser.add_argument( "--latchsize", action="store", type=float, default=8, help="size of latch in multiples of thickness") def flexBoxSide(self, x, y, r, callback=None, move=None): t = self.thickness if self.move(x+2*t, y+t, move, True): return self.moveTo(t+r, t) for i, l in zip(range(2), (x, y)): self.cc(callback, i) self.edges["f"](l - 2 * r) 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) self.cc(callback, 4) self.edges["f"](y - 2 * r - self.latchsize) self.corner(90, r) self.move(x+2*t, y+t, move) def surroundingWall(self, move=None): x, y, h, r = self.x, self.y, self.h, self.radius t = self.thickness c4 = math.pi * r * 0.5 tw = 2*x + 2*y - 8*r + 4*c4 th = h + 2.5*t if self.move(tw, th, move, True): return self.moveTo(0, 0.25*t) self.edges["F"](y - 2 * r - self.latchsize, False) if x - 2 * r < t: self.edges["X"](2 * c4 + x - 2 * r, h + 2 * t) else: self.edges["X"](c4, h + 2 * t) self.edges["F"](x - 2 * r, False) self.edges["X"](c4, h + 2 * t) self.edges["F"](y - 2 * r, False) if x - 2 * r < t: self.edges["X"](2 * c4 + x - 2 * r, h + 2 * t) else: self.edges["X"](c4, h + 2 * t) self.edge(x - 2 * r) self.edges["X"](c4, h + 2 * t) self.latch(self.latchsize, False) self.edge(h + 2 * t) self.latch(self.latchsize, False, True) self.edge(c4) self.edge(x - 2 * r) self.edge(c4) self.edges["F"](y - 2 * r, False) self.edge(c4) self.edges["F"](x - 2 * r, False) self.edge(c4) self.edges["F"](y - 2 * r - self.latchsize, False) self.corner(90) self.edge(h + 2 * t) self.corner(90) self.move(tw, th, move) def render(self): if self.outside: self.x = self.adjustSize(self.x) self.y = self.adjustSize(self.y) self.h = self.adjustSize(self.h) x, y, h = self.x, self.y, self.h self.latchsize *= self.thickness r = self.radius or min(x, y - self.latchsize) / 2.0 r = min(r, x / 2.0) self.radius = r = min(r, max(0, (y - self.latchsize) / 2.0)) self.surroundingWall(move="up") self.flexBoxSide(self.x, self.y, self.radius, move="right") self.flexBoxSide(self.x, self.y, self.radius, move="mirror")