# 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 math
import boxes
[docs]
class FlexBox(boxes.Boxes):
"""Box with living hinge and round corners"""
ui_group = "FlexBox"
def __init__(self) -> None:
boxes.Boxes.__init__(self)
self.addSettingsArgs(boxes.edges.FingerJointSettings)
self.addSettingsArgs(boxes.edges.FlexSettings)
self.buildArgParser(sx="100", y=100.0, h=100.0, outside=True)
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, y, h, r, middle=False, callback=None, move=None):
t = self.thickness
if self.move(y+2*t, h+t, move, True):
return
self.moveTo(t+r, t)
for i, l in zip(range(2), (y, h)):
self.cc(callback, i)
self.edges["f"](l - 2 * r)
self.corner(90, r)
self.cc(callback, 2)
self.edge(y - 2 * r)
self.corner(90, r)
self.cc(callback, 3)
if middle:
self.edge(self.latchsize)
else:
self.latch(self.latchsize)
self.cc(callback, 4)
self.edges["f"](h - 2 * r - self.latchsize)
self.corner(90, r)
self.move(y+2*t, h+t, move)
def _fingerHoles(self, l):
t = self.thickness
pos = -0.5*t
for x in self.sx[:-1]:
pos += x + t
self.fingerHolesAt(0, pos, l, 0)
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*y + 2*h - 8*r + 4*c4
th = x + 2.5*t
if self.move(tw, th, move, True):
return
self.moveTo(0, 0.25*t)
self._fingerHoles(h - 2 * r - self.latchsize)
self.edges["F"](h - 2 * r - self.latchsize, False)
if y - 2 * r < t:
self.edges["X"](2 * c4 + y - 2 * r, x + 2 * t)
else:
self.edges["X"](c4, x + 2 * t)
self._fingerHoles(y - 2 * r)
self.edges["F"](y - 2 * r, False)
self.edges["X"](c4, x + 2 * t)
self._fingerHoles(h - 2 * r)
self.edges["F"](h - 2 * r, False)
if y - 2 * r < t:
self.edges["X"](2 * c4 + y - 2 * r, x + 2 * t)
else:
self.edges["X"](c4, x + 2 * t)
self.edge(y - 2 * r)
self.edges["X"](c4, x + 2 * t)
self.latch(self.latchsize, False)
self.edge(x + 2 * t)
self.latch(self.latchsize, False, True)
self.edge(c4)
self.edge(y - 2 * r)
self.edge(c4)
self.edges["F"](h - 2 * r, False)
self.edge(c4)
self.edges["F"](y - 2 * r, False)
self.edge(c4)
self.edges["F"](h - 2 * r - self.latchsize, False)
self.corner(90)
self.edge(x + 2 * t)
self.corner(90)
self.move(tw, th, move)
def render(self):
if self.outside:
self.sx = self.adjustSize(self.sx)
self.y = self.adjustSize(self.y)
self.h = self.adjustSize(self.h)
sx, y, h = self.sx, self.y, self.h
x = self.x = sum(sx) + (len(sx)-1) * self.thickness
self.latchsize *= self.thickness
r = self.radius or min(y, h - self.latchsize) / 2.0
r = min(r, y / 2.0)
self.radius = r = min(r, max(0, (h - self.latchsize) / 2.0))
self.surroundingWall(move="up")
for i in range(len(sx)):
self.flexBoxSide(self.y, self.h, self.radius, middle=i>0, move="right")
self.flexBoxSide(self.y, self.h, self.radius, move="mirror")
