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Code Issues Releases Wiki Activity

support scale

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This commit is contained in:
Justin Lin 2017-05-02 20:22:54 +08:00
parent 1577e6a967
commit e45bb37379
1 changed files with 8 additions and 4 deletions
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12
src/path_extend.scad
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@ -13,7 +13,7 @@
*
**/
module path_extend(stroke_pts, path_pts) {
module path_extend(stroke_pts, path_pts, scale = 1.0) {
function length(p1, p2) =
let(
x1 = p1[0],
@ -32,6 +32,10 @@ module path_extend(stroke_pts, path_pts) {
leng_path_pts = len(path_pts);
scale_step = (scale - 1) / (leng_path_pts - 1);
echo(scale_step);
function first_stroke() =
let(
p1 = path_pts[0],
@ -43,20 +47,20 @@ module path_extend(stroke_pts, path_pts) {
rotate_p(p, a) + p1
];
function stroke(p1, p2) =
function stroke(p1, p2, i) =
let(
leng = length(p1, p2),
a = az(p1, p2)
)
[
for(p = stroke_pts)
rotate_p(p + [0, leng], a) + p1
rotate_p(p * (1 + scale_step * i) + [0, leng], a) + p1
];
function path_extend_inner(index) =
index == leng_path_pts ? [] :
concat(
[stroke(path_pts[index - 1], path_pts[index])],
[stroke(path_pts[index - 1], path_pts[index], index)],
path_extend_inner(index + 1)
);