boxespy/boxes/generators/regularstarbox.py

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#!/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/>.
from boxes import *
import copy
class SlotEdge(edges.Edge):
def __call__(self, length, **kw):
t, n = self.settings.thickness, self.settings.n
r, h = self.settings.radius, self.settings.h
sh = self.settings.sh # distance side to center
li = 2 * sh * math.tan(math.radians(90/n)) # side inner 2x polygone
ls2 = t / math.tan(math.radians(180/n))
ls1 = t / math.cos(math.radians(90-(180/n)))
lo = (length-li-2*ls1)/2
li = li - 2*ls2 # correct for overlap of wall
d = h/2
if li > 0:
poly = [lo-1, (90, 1), d+t-1, -90, ls1+ls2, -90, d-t, (90, t)]
self.polyline(*(poly + [li-2*t] + list(reversed(poly))))
def startwidth(self):
return self.settings.thickness
class RegularStarBox(Boxes):
"""Regular polygon boxes that form a star when closed"""
ui_group = "Box"
description = """![Open box](static/samples/RegularStarBox-2.jpg)"""
def __init__(self):
Boxes.__init__(self)
self.addSettingsArgs(edges.FingerJointSettings)
self.buildArgParser("h", "outside")
self.argparser.add_argument(
"--radius", action="store", type=float, default=50.0,
help="inner radius if the box (center to corners)")
self.argparser.add_argument(
"--n", action="store", type=int, default=5,
choices=(3, 4, 5),
help="number of sides")
def render(self):
r, h, n = self.radius, self.h, self.n
if self.outside:
self.r = r = r - self.thickness / math.cos(math.radians(360/(2*n)))
self.h = h = self.adjustSize(h)
t = self.thickness
fingerJointSettings = copy.deepcopy(self.edges["f"].settings)
fingerJointSettings.setValues(self.thickness, angle=360./n)
fingerJointSettings.edgeObjects(self, chars="gGH")
self.edges["e"] = SlotEdge(self, self)
r, sh, side = self.regularPolygon(n, radius=r)
self.sh = sh
with self.saved_context():
self.regularPolygonWall(corners=n, r=r, edges='F', move="right")
self.regularPolygonWall(corners=n, r=r, edges='F', move="right")
self.regularPolygonWall(corners=n, r=r, edges='F', move="up only")
for s in range(2):
with self.saved_context():
if n % 2:
for i in range(n):
self.rectangularWall(side, h, move="right",
edges="fgeG")
else:
for i in range(n//2):
self.rectangularWall(side, h, move="right",
edges="fGeG")
self.rectangularWall(side, h, move="right",
edges="fgeg")
self.rectangularWall(side, h, move="up only",
edges="fgeG")