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safety checks on mesh points and group array reductions

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This commit is contained in:
Stewart Allen 2024-07-22 19:03:27 -04:00
commit d982672bb6
1 changed files with 3 additions and 2 deletions
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5
src/geo/slicer.js
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@ -173,7 +173,7 @@ async function slice(points, options = {}) {
p1 = points[i++]; p1 = points[i++];
p2 = points[i++]; p2 = points[i++];
p3 = points[i++]; p3 = points[i++];
let zm = Math.min(p1.z, p2.z, p3.z), let zm = Math.max(0, Math.min(p1.z, p2.z, p3.z)),
zM = Math.max(p1.z, p2.z, p3.z), zM = Math.max(p1.z, p2.z, p3.z),
bm = Math.floor(zm * zScale), bm = Math.floor(zm * zScale),
bM = Math.min(Math.ceil(zM * zScale), bucketCount); bM = Math.min(Math.ceil(zM * zScale), bucketCount);
@ -391,7 +391,8 @@ async function sliceZ(z, points, options = {}) {
groups = POLY.xor(groups); groups = POLY.xor(groups);
} }
if (options.union) { if (options.union) {
let points = groups.map(p => p.length).reduce((a,b) => a + b); let points = groups.map(p => p.length);
if (points.length > 1) points = points.reduce((a,b) => a + b);
// simplistic healing of non-manifold meshes // simplistic healing of non-manifold meshes
let opt = { x: 1 }; let opt = { x: 1 };
let union = POLY.union(POLY.nest(groups), 0.1, true, opt); let union = POLY.union(POLY.nest(groups), 0.1, true, opt);