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calculate new inset after first pass extrusion. possible to use new inset for another pass vs recycling medial axis

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This commit is contained in:
Stewart Allen 2025-09-17 17:13:34 -04:00
commit 2c8925002b
1 changed files with 22 additions and 6 deletions
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28
src/kiri/mode/fdm/post.js
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@ -178,6 +178,8 @@ function thin_type_3(params) {
let intersectChains = true;
let showNoodle = false;
let showExtrusion = true;
let showExtrudeInset = false;
let showInsetPoints = false;
let showChainRawPoints = false;
let showChainInterpPoints = true;
@ -685,6 +687,7 @@ function thin_type_3(params) {
let { SEGINT } = base.key;
inset = POLY.flatten(inset, []);
for (let poly of inset) {
let nupoly = new Polygon();
poly.segment(minR).forEachSegment((p1, p2) => {
let np1 = { x:(p1.x+p2.x)/2, y:(p1.y+p2.y)/2 };
let len = pointDist(p1, p2);
@ -711,28 +714,41 @@ function thin_type_3(params) {
let mr = Math.min(p1.r, p2.r);
if (mr < minR) return;
let pop = div(mr);
let odd = (pop.length % 2 === 1);
let len = Math.ceil(pop.length / 2);
if (odd && p1.claimed) len--;
// implement first-to-intersect claim system
// for odd wall counts so that they're not emitted twice
// todo extend to all odd counts
if (pop.length === 1 && p1.claimed) {
if (len === 0) {
return;
}
p1.claimed = true;
if (pop.length === 1) {
nupoly.push(new Point(min.x, min.y));
// for single wall place it exactly on medial axis
if (showExtrusion)
shells.push(newPolygon().centerCircle({
x: min.x,
y: min.y
}, mr, 12));
} else {
let off = -dstep;
// otherwise use divisions
shells.push(newPolygon().centerCircle({
x: np1.x + dy * (pop[0] - dstep),
y: np1.y - dx * (pop[0] - dstep)
}, pop[0], 12));
for (let i=0; i<1; i++) {
off += (pop[i] * (i ? 2 : 1));
if (showExtrusion)
shells.push(newPolygon().centerCircle({
x: np1.x + dy * off,
y: np1.y - dx * off
}, pop[0], 12));
}
off += dstep / 2;
nupoly.push(new Point(np1.x + dy * off * 2, np1.y - dx * off * 2));
}
p1.claimed = true;
}
});
if (showExtrudeInset) shells.push(nupoly);
}
}