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Added optional "center" param to triangle() and a_triangle() modules

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Dave 2018-07-09 18:23:10 -07:00
parent 0e57f5500a
commit 89009d9289
1 changed files with 13 additions and 13 deletions
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26
triangles.scad
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@ -11,14 +11,16 @@
/** /**
* Standard right-angled triangle * Standard right-angled triangle
* *
* @param number o_len Lenght of the opposite side * @param number o_len Length of the opposite side
* @param number a_len Lenght of the adjacent side * @param number a_len Length of the adjacent side
* @param number depth How wide/deep the triangle is in the 3rd dimension * @param number depth How wide/deep the triangle is in the 3rd dimension
* @param boolean center Whether to center the triangle on the origin
* @todo a better way ? * @todo a better way ?
*/ */
module triangle(o_len, a_len, depth) module triangle(o_len, a_len, depth, center=false)
{ {
linear_extrude(height=depth) centroid = center ? [-a_len/3, -o_len/3, -depth/2] : [0, 0, 0];
translate(centroid) linear_extrude(height=depth)
{ {
polygon(points=[[0,0],[a_len,0],[0,o_len]], paths=[[0,1,2]]); polygon(points=[[0,0],[a_len,0],[0,o_len]], paths=[[0,1,2]]);
} }
@ -27,16 +29,14 @@ module triangle(o_len, a_len, depth)
/** /**
* Standard right-angled triangle (tangent version) * Standard right-angled triangle (tangent version)
* *
* @param number angle of adjacent to hypotenuse (ie tangent) * @param number tan_angle Angle of adjacent to hypotenuse (ie tangent)
* @param number a_len Lenght of the adjacent side * @param number a_len Length of the adjacent side
* @param number depth How wide/deep the triangle is in the 3rd dimension * @param number depth How wide/deep the triangle is in the 3rd dimension
* @param boolean center Whether to center the triangle on the origin
*/ */
module a_triangle(tan_angle, a_len, depth) module a_triangle(tan_angle, a_len, depth, center=false)
{ {
linear_extrude(height=depth) triangle(tan(tan_angle) * a_len, a_len, depth, center);
{
polygon(points=[[0,0],[a_len,0],[0,tan(tan_angle) * a_len]], paths=[[0,1,2]]);
}
} }
// Tests: // Tests: