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improve split healing

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This commit is contained in:
Stewart Allen 2024-08-10 23:49:32 -04:00
commit 23d065aca8
1 changed files with 35 additions and 36 deletions
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75
src/mesh/work.js
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@ -254,52 +254,51 @@ let model = {
}
}
}
{
// find unshared edges on Z plane
let faces = o1.group(3);
for (let face of faces) {
edges.push({ p1: face[0], p2: face[1] });
edges.push({ p1: face[1], p2: face[2] });
edges.push({ p1: face[2], p2: face[0] });
}
// eliminate edges that show up twice since it means they're shared
outer: for (let i=0, l=edges.length; i<l; i++) {
for (let j=i+1; j<l; j++) {
let e1 = edges[i];
let e2 = edges[j];
if (!(e1 && e2)) {
continue;
}
if (e1.p1.equals(e2.p1) && e1.p2.equals(e2.p2)) {
edges[i] = edges[j] = undefined;
continue outer;
}
if (e1.p2.equals(e2.p1) && e1.p1.equals(e2.p2)) {
edges[i] = edges[j] = undefined;
continue outer;
}
}
}
// filter and convert Vector3 to Point for sliceConnect()
edges = edges.filter(e => e && e.p1.z === z && e.p2.z === z).map(e => {
return {
p1: newPoint().move(e.p1),
p2: newPoint().move(e.p2),
}
});
o1 = o1.map(e => [ ...e ]).flat();
o2 = o2.map(e => [ ...e ]).flat();
// find unshared edges on Z plane
let faces = o1.group(3);
for (let face of faces) {
edges.push({ p1: face[0], p2: face[1] });
edges.push({ p1: face[1], p2: face[2] });
edges.push({ p1: face[2], p2: face[0] });
}
// eliminate edges that show up twice since it means they're shared
outer: for (let i=0, l=edges.length; i<l; i++) {
for (let j=i+1; j<l; j++) {
let e1 = edges[i];
let e2 = edges[j];
if (!(e1 && e2)) {
continue;
}
if (e1.p1.equals(e2.p1) && e1.p2.equals(e2.p2)) {
edges[i] = edges[j] = undefined;
continue outer;
}
if (e1.p2.equals(e2.p1) && e1.p1.equals(e2.p2)) {
edges[i] = edges[j] = undefined;
continue outer;
}
}
}
// filter and convert Vector3 to Point for sliceConnect()
edges = edges.filter(e => e && e.p1.z === z && e.p2.z === z).map(e => {
return {
p1: newPoint().move(e.p1),
p2: newPoint().move(e.p2),
}
});
// flatten output points to arrays
o1 = o1.map(e => [ ...e ]).flat();
o2 = o2.map(e => [ ...e ]).flat();
if (edges.length) {
// heal open spaces created by split
// heal unshared edges created along Z split
// normals (from point array) are reversed for the bottom split
let heal = sliceConnect(edges, z).map(poly => poly.earcut()).flat();
let o1p = heal.map(poly => poly.points.map(p => [ p.x, p.y, p.z ]));
let o2p = heal.map(poly => poly.points.reverse().map(p => [ p.x, p.y, p.z ]));
o1.appendAll(o1p.flat().flat());
o2.appendAll(o2p.flat().flat());
console.log({ edges, heal, o1, o2 });
// console.log({ edges, heal, o1, o2 });
}
// return null;
return { o1: o1.toFloat32(), o2: o2.toFloat32() };
},