boxespy/flexbox3.py

#!/usr/bin/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/>.

from boxes import *
import math

class FlexBox(Boxes):
    """Box with living hinge"""
    def __init__(self):
        Boxes.__init__(self)
        self.buildArgParser("x", "y")
        self.argparser.add_argument(
            "--z",  action="store", type=float, default=100.0,
            help="height of the box")
        self.argparser.add_argument(
            "--h",  action="store", type=float, default=10.0,
            help="height of the lid")
        self.argparser.add_argument(
            "--radius",  action="store", type=float, default=10.0,
            help="radius of the lids living hinge")
        self.argparser.add_argument(
            "--c",  action="store", type=float, default=1.0,
            dest="d", help="clearance of the lid")

    def rectangleCorner(self, edge1=None, edge2=None):
        edge1 = self.edges.get(edge1, edge1)
        edge2 = self.edges.get(edge2, edge2)
        if edge2:
            self.edge(edge2.width())
        self.corner(90)
        if edge1:
            self.edge(edge1.width())

    @restore
    def flexBoxSide(self, x, y, r, callback=None):
        self.cc(callback, 0)
        self.fingerJointEdge(x)
        self.corner(90, 0)
        self.cc(callback, 1)
        self.fingerJointEdge(y-r)
        self.corner(90, r)
        self.cc(callback, 2)
        self.edge(x-r)
        self.corner(90, 0)
        self.cc(callback, 3)
        self.fingerJointEdge(y)
        self.corner(90)

    def surroundingWall(self):
        x, y, z, r, d = self.x, self.y, self.z, self.radius, self.d
        
        self.edges["F"](y-r, False)
        self.flexEdge(self.c4, z+2*self.thickness)
        self.corner(-90)
        self.edge(d)
        self.corner(90)
        self.edges["f"](x-r+d)
        self.corner(90)
        self.edges["f"](z+2*self.thickness+2*d)
        self.corner(90)
        self.edges["f"](x-r+d)
        self.corner(90)
        self.edge(d)
        self.corner(-90)
        self.edge(self.c4)
        self.edges["F"](y-r)
        self.corner(90)
        self.edge(self.thickness)
        self.edges["f"](z)
        self.edge(self.thickness)
        self.corner(90)

    @restore
    def lidSide(self):
        x, y, z, r, d, h = self.x, self.y, self.z, self.radius, self.d, self.h
        t = self.thickness
        r2 = r+t if r+t <=h+t else h+t
        self.moveTo(self.thickness, self.thickness)
        self.edge(h+self.thickness-r2)
        self.corner(90, r2)
        self.edge(r-r2+2*t)
        self.edges["F"](x-r)
        self.rectangleCorner("F", "f")
        self.edges["g"](h)
        self.rectangleCorner("f", "e")
        self.edge(x+2*t)

    def render(self):
        x, y, z, d, h = self.x, self.y, self.z, self.d, self.h
        r = self.radius = self.radius or min(x, y)/2.0
        thickness = self.thickness

        self.c4 = c4 = math.pi * r * 0.5 * 0.95
        self.latchsize = 8*thickness

        width = 2*x + y - 2*r + c4 + 14*thickness + 3*h # lock
        height = y + z + 8*thickness

        self.open(width, height)

        self.edges["f"].settings.setValues(
            self.thickness, finger=2, space=2, surroundingspaces=1)

        s = FingerJointSettings(self.thickness, surroundingspaces=1)
        g = FingerJointEdge(self, s)
        g.char = "g"
        self.addPart(g)
        G = FingerJointEdgeCounterPart(self, s)
        G.char = "G"
        self.addPart(G)

        self.moveTo(2*self.thickness, self.thickness+2*d)
        self.ctx.save()
        self.surroundingWall()
        self.moveTo(x+y-2*r+self.c4+self.thickness, -2*d-self.thickness)
        self.rectangularWall(x, z, edges="FFFF", move="right")
        self.rectangularWall(h, z+2*(d+self.thickness),
                             edges="GeGF", move="right")
        self.lidSide()
        self.moveTo(2*h+5*self.thickness, 0)
        self.ctx.scale(-1, 1)
        self.lidSide()

        self.ctx.restore()
        self.moveTo(0, z+4*self.thickness+2*d)
        self.flexBoxSide(x, y, r)
        self.moveTo(2*x+3*self.thickness, 2*d)
        self.ctx.scale(-1, 1)
        self.flexBoxSide(x, y, r)
        self.ctx.scale(-1, 1)
        self.moveTo(2*self.thickness, -self.thickness)
        self.rectangularWall(z, y, edges="fFeF")

        self.close()

def main():
    b = FlexBox() #100, 40, 100, r=20, h=10, thickness=4.0)
    b.parseArgs()
    b.render()

if __name__=="__main__":
    main()