Source code for boxes.generators.fanhole

#!/usr/bin/env python3
# Copyright (C) 2013-2016 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
#   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 <>.

from boxes import *

[docs]class FanHole(Boxes): """Hole pattern for mounting a fan""" ui_group = "Holes" def __init__(self): Boxes.__init__(self) self.argparser.add_argument( "--diameter", action="store", type=float, default=80, help="diameter of the fan hole") self.argparser.add_argument( "--mounting_holes", action="store", type=float, default=3, help="diameter of the fan mounting holes") self.argparser.add_argument( "--mounting_holes_inset", action="store", type=float, default=5, help="distance of the fan mounting holes from the outside") self.argparser.add_argument( "--arms", action="store", type=int, default=10, help="number of arms") self.argparser.add_argument( "--inner_disc", action="store", type=float, default=.2, help="relative size of the inner disc") self.argparser.add_argument( "--style", action="store", type=str, default="CW Swirl", choices=["CW Swirl", "CCW Swirl", "Hole"], help="Style of the fan hole") def arc(self, d, a): r = abs(1/math.cos(math.radians(90-a/2))*d/2) self.corner(-a/2) self.corner(a, r) self.corner(-a/2) def swirl(self, r, ri_rel=.1, n=20): d = 2*r #r = d/2 ri = ri_rel * r ai = 90 ao = 360/n * 0.8 # angle going in a1 = math.degrees(math.atan( ri*math.sin(math.radians(ai)) / (r - ri*math.cos(math.radians(ai))))) d1= (ri*math.sin(math.radians(ai))**2 + (r - ri*math.cos(math.radians(ai)))**2)**.5 d2= (ri*math.sin(math.radians(ai-ao))**2 + (r - ri*math.cos(math.radians(ai-ao)))**2)**.5 # angle coming out a_i2 = math.degrees(math.atan( (r*math.sin(math.radians(ao)) - ri*math.sin(math.radians(ai))) / (r*math.cos(math.radians(ao)) - ri*math.cos(math.radians(ai))))) a3 = a1 + a_i2 a2 = 90 + a_i2 - ao self.moveTo(0, -r, 180) for i in range(n): with self.saved_context(): self.corner(-ao, r) self.corner(-a2) self.arc(d2, -90) self.corner(-180+a3) self.arc(d1, 85) self.corner(-90-a1) self.moveArc(-360./n, r) def render(self): r_h = self.mounting_holes / 2 d = self.diameter inset = self.mounting_holes_inset for px in (inset, d-inset): for py in (inset, d-inset): self.hole(px, py, r_h) self.moveTo(d/2, d/2) print( if == "CW Swirl": self.ctx.scale(-1, 1) self.swirl(d/2, self.inner_disc, self.arms) elif == "CCW Swirl": self.swirl(d/2, self.inner_disc, self.arms) else: #Hole self.hole(0, 0, d=d)