65 lines
1.6 KiB
OpenSCAD
65 lines
1.6 KiB
OpenSCAD
/**
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* Simple triangles library
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*
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* Authors:
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* - Eero 'rambo' af Heurlin 2010-
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*
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* License: LGPL 2.1
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*/
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/**
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* Standard right-angled triangle
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*
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* @param number o_len Length of the opposite side
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* @param number a_len Length of the adjacent side
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* @param number depth How wide/deep the triangle is in the 3rd dimension
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* @param boolean center Whether to center the triangle on the origin
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* @todo a better way ?
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*/
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module triangle(o_len, a_len, depth, center=false)
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{
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centroid = center ? [-a_len/3, -o_len/3, -depth/2] : [0, 0, 0];
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translate(centroid) linear_extrude(height=depth)
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{
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polygon(points=[[0,0],[a_len,0],[0,o_len]], paths=[[0,1,2]]);
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}
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}
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/**
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* Standard right-angled triangle (tangent version)
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*
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* @param number tan_angle Angle of adjacent to hypotenuse (ie tangent)
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* @param number a_len Length of the adjacent side
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* @param number depth How wide/deep the triangle is in the 3rd dimension
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* @param boolean center Whether to center the triangle on the origin
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*/
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module a_triangle(tan_angle, a_len, depth, center=false)
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{
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triangle(tan(tan_angle) * a_len, a_len, depth, center);
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}
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// Tests:
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module test_triangle() { triangle(5, 5, 5); }
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module test_a_triangle() { a_triangle(45, 5, 5); }
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module test_triangles()
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{
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// Generate a bunch of triangles by sizes
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for (i = [1:10])
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{
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translate([i*7, -30, i*7])
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{
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triangle(i*5, sqrt(i*5+pow(i,2)), 5);
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}
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}
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// Generate a bunch of triangles by angle
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for (i = [1:85/5])
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{
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translate([i*7, 22, i*7])
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{
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a_triangle(i*5, 10, 5);
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}
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}
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}
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