# 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
# 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 *
[docs]
class LaserHoldfast(Boxes):
"""A holdfast for honey comb tables of laser cutters"""
ui_group = "Part"
burn: float
x: float
h: float
hookheight: float
shaftwidth: float
cutlength: float
num: int
def __init__(self) -> None:
Boxes.__init__(self)
self.buildArgParser(x=25, h=40)
self.argparser.add_argument(
"--hookheight", action="store", type=float, default=5.0,
help="height of the top hook")
self.argparser.add_argument(
"--shaftwidth", action="store", type=float, default=5.0,
help="width of the shaft")
self.argparser.add_argument(
"--cutlength", action="store", type=float, default=0.0,
help="length of cut in the shaft")
self.argparser.add_argument(
"--num", action="store", type=int, default=1,
help="number of holdfasts")
def render(self):
mx, my = self.offset()
for _ in range(self.num):
self.render_one()
self.moveTo(mx, my)
def offset(self):
"""Calculate offset for next part"""
hh = self.hookheight
a = 30
r = self.x/math.radians(a)
d = r - r * math.cos(math.radians(a/2))
dd = hh - hh * math.cos(math.radians(a/2))
mx = hh + d - dd + self.spacing
my = self.shaftwidth + self.spacing
return mx, my
def render_one(self, move=None):
# adjust to the variables you want in the local scope
x, hh, h, sw = self.x, self.hookheight, self.h, self.shaftwidth
a = 30
r = x/math.radians(a)
dd = hh - hh * math.cos(math.radians(a/2)) + self.burn
# Hook
self.polygonWall(
[
hh + h - dd, (180, sw / 2),
h, (-90 + a / 2, self.burn),
0, (-a, r),
0, (180, hh / 2),
0, (a, r + hh),
0, (-a / 2, self.burn),
sw - math.sin(math.radians(a / 2)) * hh + self.burn/2, 0,
None
],
edge='e',
correct_corners=False,
move=move,
callback=self.cutcallback if self.cutlength else None
)
def cutcallback(self, num):
"""Create cut in shaft if requested"""
if num == 1:
self.ctx.stroke()
with self.saved_context():
self.set_source_color(Color.INNER_CUT)
self.moveTo(-self.shaftwidth/2-self.burn, self.shaftwidth/2)
self.edge(self.cutlength)
self.ctx.stroke()
