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Code Issues Releases Wiki Activity

supported scale

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This commit is contained in:
Justin Lin 2017-05-02 15:52:32 +08:00
parent 6fb9ba9416
commit a9ca2609ee
1 changed files with 8 additions and 6 deletions
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14
src/path_extrude.scad
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@ -13,7 +13,7 @@
*
**/
module path_extrude(shape_pts, path_pts, triangles = "RADIAL") {
module path_extrude(shape_pts, path_pts, triangles = "RADIAL", scale = 1.0) {
function first_section() =
let(
p1 = path_pts[0],
@ -28,9 +28,11 @@ module path_extrude(shape_pts, path_pts, triangles = "RADIAL") {
for(p = shape_pts)
rotate_p(p, [0, ay, az]) + p1
];
function section(p1, p2) =
len_path_pts = len(path_pts);
scale_step = (scale - 1) / (len_path_pts - 1);
function section(p1, p2, i) =
let(
dx = p2[0] - p1[0],
dy = p2[1] - p1[1],
@ -41,16 +43,16 @@ module path_extrude(shape_pts, path_pts, triangles = "RADIAL") {
)
[
for(p = shape_pts)
rotate_p(p + [0, 0, length], [0, ay, az]) + p1
rotate_p(p * (1 + scale_step * i) + [0, 0, length], [0, ay, az]) + p1
];
len_path_pts = len(path_pts);
function path_extrude_inner(index) =
index == len_path_pts ? [] :
concat(
[section(path_pts[index - 1], path_pts[index])],
[section(path_pts[index - 1], path_pts[index], index)],
path_extrude_inner(index + 1)
);