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37 lines
1.2 KiB
OpenSCAD
37 lines
1.2 KiB
OpenSCAD
//
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// NopSCADlib Copyright Chris Palmer 2018
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// nop.head@gmail.com
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// hydraraptor.blogspot.com
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//
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// This file is part of NopSCADlib.
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//
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// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
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// GNU General Public License as published by the Free Software Foundation, either version 3 of
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// the License, or (at your option) any later version.
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//
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// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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// See the GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along with NopSCADlib.
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// If not, see <https://www.gnu.org/licenses/>.
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//
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//
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//! A sector of a circle between two angles.
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//
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include <../core.scad>
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module sector(r, start_angle, end_angle) { //! Create specified sector given radius ```r```, ```start_angle``` and ```end_angle```
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R = r * sqrt(2) + 1;
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if(end_angle > start_angle)
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intersection() {
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circle4n(r);
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// A 4 triangle fan
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polygon([[0, 0],
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for(i = [0 : 4], a = start_angle + i * (end_angle - start_angle) / 4) R * [cos(a), sin(a)] ]);
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}
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}
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