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added archimedean_spiral_extrude.scad

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Justin Lin
2017-05-05 15:56:01 +08:00
parent 1cdec21beb
commit 1b5a18b5d6

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/**
* archimedean_spiral_extrude.scad
*
* Extrudes a 2D shape along the path of a archimedean spiral.
*
* @copyright Justin Lin, 2017
* @license https://opensource.org/licenses/lgpl-3.0.html
*
* @see https://openhome.cc/eGossip/OpenSCAD/lib-archimedean_spiral_extrude.html
*
**/
module archimedean_spiral_extrude(shape_pts, arm_distance, init_angle, point_distance, num_of_points,
rt_dir = "CT_CLK", twist = 0, scale = 1.0, triangles = "RADIAL") {
points_angles = archimedean_spiral(
arm_distance = arm_distance,
init_angle = init_angle,
point_distance = point_distance,
num_of_points = num_of_points,
rt_dir = rt_dir
);
points = [for(pa = points_angles) pa[0]];
angles = [
for(pa = points_angles)
[90, 0, pa[1]]
];
polysections(
cross_sections(shape_pts, points, angles, twist, scale),
triangles = triangles
);
}