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further fixes to path_extrude2d

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Adrian Mariano 2021-10-31 00:54:00 -04:00
parent 5934705dcd
commit 662f6c458d
1 changed files with 9 additions and 15 deletions
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24
mutators.scad
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@ -478,7 +478,7 @@ module chain_hull()
// path_extrude2d(path, [caps], [closed]) {...}
// Description:
// Extrudes 2D children along the given 2D path, with optional rounded endcaps. This module works properly in general only if the given
// children are symmetric across the Y axis. It works by constructing flat sections corresponding to each segment of the path and
// children are convex and symmetric across the Y axis. It works by constructing flat sections corresponding to each segment of the path and
// inserting rounded joints at each corner.
// Arguments:
// path = The 2D path to extrude the geometry along.
@ -510,23 +510,17 @@ module path_extrude2d(path, caps=false, closed=false) {
for (p=pair(path,wrap=closed))
extrude_from_to(p[0],p[1]) xflip()rot(-90)children();
for (t=triplet(path,wrap=closed)) {
ang = 180-vector_angle(t);
rightside = _point_left_of_line2d(t[2],[t[0],t[1]])>0;
ang = -(180-vector_angle(t)) * sign(_point_left_of_line2d(t[2],[t[0],t[1]]));
delt = point3d(t[2] - t[1]);
if (ang>0)
translate(t[1]) {
if (rightside){ //ang >= 0) {
rotate(90-ang)
frame_map(x=-delt, z=UP)
rotate_extrude(angle=ang)
if (ang!=0)
translate(t[1]) {
frame_map(y=delt, z=UP)
rotate_extrude(angle=ang)
if (ang<0)
right_half(planar=true) children();
} else {
rotate(-(90-ang))
frame_map(x=delt, z=UP)
rotate_extrude(angle=-ang)
left_half(planar=true) children();
else
left_half(planar=true) children();
}
}
}
if (caps) {