Source code for boxes.generators.burntest

# Copyright (C) 2013-2019 Florian Festi
# Copyright (C) 2024 Seth Fischer
#   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 datetime import date

from boxes import *

[docs] class BurnTest(Boxes): """Test different burn values""" description = """This generator will make shapes that you can use to select optimal value for burn parameter for other generators. After burning try to attach sides with the same value and use best fitting one on real projects. In this generator set burn in the Default Settings to the lowest value to be tested. To get an idea cut a rectangle with known nominal size and measure the shrinkage due to the width of the laser cut. Now you can measure the burn value that you should use in other generators. It is half the difference of the overall size as shrinkage is occurring on both sides. You can use the reference rectangle as it is rendered without burn correction. See also LBeam that can serve as compact BurnTest and FlexTest for testing flex settings. """ ui_group = "Part" def __init__(self) -> None: Boxes.__init__(self) self.addSettingsArgs(edges.FingerJointSettings) self.buildArgParser(x=100) self.argparser.add_argument( "--step", action="store", type=float, default=0.01, help="increases in burn value between the sides", ) self.argparser.add_argument( "--pairs", action="store", type=int, default=2, help="number of pairs (each testing four burn values)", ) self.argparser.add_argument( "--date", action="store", type=boolarg, default=False, help="add current date etching to each piece", ) self.argparser.add_argument( "--id", action="store", type=str, default="", help="add identifier etching to each piece", ) def render(self): font = { "fontsize": 12.5 * self.x / 100 if self.x < 81 else 10, "align": "center", "color": Color.ETCHING, } font_meta = font.copy() font_meta["fontsize"] = font["fontsize"] * 0.75 today ="%Y-%m-%d") x, s = self.x, self.step t = self.thickness self.moveTo(t, t) for cnt in range(self.pairs): for i in range(4): self.text("%.3fmm" % self.burn, x / 2, t, **font) if and i == 3: self.text(today, x / 2, 20, **font_meta) if and i == 1: self.text(, x / 2, 20, **font_meta) self.edges["f"](x) self.corner(90) self.burn += s self.burn -= 4 * s self.moveTo(x + 2 * t + self.spacing, -t) for i in range(4): self.text("%.3fmm" % self.burn, x / 2, t, **font) if and i == 3: self.text(today, x / 2, 20, **font_meta) if and i == 1: self.text(, x / 2, 20, **font_meta) self.edges["F"](x) self.polyline(t, 90, t) self.burn += s self.moveTo(x + 2 * t + self.spacing, t)