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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 16:29:01 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 16:29:01 +0000 |
commit | 35a96bde514a8897f6f0fcc41c5833bf63df2e2a (patch) | |
tree | 657d15a03cc46bd099fc2c6546a7a4ad43815d9f /share/extensions/render_gear_rack.py | |
parent | Initial commit. (diff) | |
download | inkscape-35a96bde514a8897f6f0fcc41c5833bf63df2e2a.tar.xz inkscape-35a96bde514a8897f6f0fcc41c5833bf63df2e2a.zip |
Adding upstream version 1.0.2.upstream/1.0.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'share/extensions/render_gear_rack.py')
-rwxr-xr-x | share/extensions/render_gear_rack.py | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/share/extensions/render_gear_rack.py b/share/extensions/render_gear_rack.py new file mode 100755 index 0000000..201df6f --- /dev/null +++ b/share/extensions/render_gear_rack.py @@ -0,0 +1,81 @@ +#!/usr/bin/env python +# +# Copyright (C) 2013 Brett Graham (hahahaha @ hahaha.org) +# +# 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 2 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, write to the Free Software +# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +# +""" +Generate a gear rack as SVG. +""" + +from math import acos, cos, radians, sin, sqrt, tan + +import inkex + +def involute_intersect_angle(Rb, R): + Rb, R = float(Rb), float(R) + return (sqrt(R ** 2 - Rb ** 2) / Rb) - (acos(Rb / R)) + + +def point_on_circle(radius, angle): + x = radius * cos(angle) + y = radius * sin(angle) + return x, y + + +def points_to_svgd(p): + """ + p: list of 2 tuples (x, y coordinates) + """ + f = p[0] + p = p[1:] + svgd = 'M{:.3f},{:.3f}'.format(f[0], f[1]) + for x in p: + svgd += 'L{:.3f},{:.3f}'.format(x[0], x[1]) + return svgd + + +class RackGear(inkex.GenerateExtension): + container_label = 'Rendered Gear Rack' + def add_arguments(self, pars): + pars.add_argument("--length", type=float, default=100.0, help="Rack Length") + pars.add_argument("--spacing", type=float, default=10.0, help="Tooth Spacing") + pars.add_argument("--angle", type=float, default=20.0, help="Contact Angle") + + def generate(self): + length = self.svg.unittouu(str(self.options.length) + 'px') + spacing = self.svg.unittouu(str(self.options.spacing) + 'px') + angle = radians(self.options.angle) + + # generate points: list of (x, y) pairs + points = [] + x = 0 + tas = tan(angle) * spacing + while x < length: + # move along path, generating the next 'tooth' + points.append((x, 0)) + points.append((x + tas, spacing)) + points.append((x + spacing, spacing)) + points.append((x + spacing + tas, 0)) + x += spacing * 2. + + path = points_to_svgd(points) + + # Create SVG Path for gear + style = {'stroke': '#000000', 'fill': 'none', 'stroke-width': str(self.svg.unittouu('1px'))} + yield inkex.PathElement(style=str(inkex.Style(style)), d=str(path)) + +if __name__ == '__main__': + RackGear().run() |