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more pluggable bits for replacing fdm/cam slicers

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This commit is contained in:
Stewart Allen 2022-02-01 21:21:54 -05:00
commit 0d536736c5
1 changed files with 27 additions and 7 deletions
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34
src/geo/slicer.js
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@ -31,13 +31,15 @@ async function slice(points, options = {}) {
let zMin = options.zmin || 0,
zMax = options.zmax || 0,
zInc = options.zinc || 0,
zGen = options.zGen, // optional z index generator function
zIndexes = options.indices || [],
minStep = options.minstep || 0,
zFlat = {}, // map area of z index flat areas
zList = {}, // fast map of z indexes
zScale, // bucket span in z units
zSum = 0.0, // sanity check that points enclose non-zere volume
buckets = [], // banded/grouped faces to speed up slice/search
zFlat = {}, // map area of z index flat areas
zList = {}, // fast map of z indexes
zLine = [], // map of line counts co-linear to z plane
zScale, // bucket span in z units
zSum = 0.0, // sanity check that points enclose non-zere volume
buckets = [], // banded/grouped faces to speed up slice/search
overlapMax = options.overlap || 0.75,
bucketMax = options.bucketmax || 100,
onupdate = options.onupdate || function() {},
@ -85,6 +87,13 @@ async function slice(points, options = {}) {
} else {
zFlat[zkey] += area;
}
zLine[zkey] = (zLine[zkey] || 0) + 1;
} else if (p1.z === p2.z) {
zLine[p1.z] = (zLine[p1.z] || 0) + 1;
} else if (p2.z === p3.z) {
zLine[p2.z] = (zLine[p2.z] || 0) + 1;
} else if (p3.z === p1.z) {
zLine[p3.z] = (zLine[p3.z] || 0) + 1;
}
if (autoDim) {
zMin = Math.min(zMin, p1.z, p2.z, p3.z);
@ -114,6 +123,12 @@ async function slice(points, options = {}) {
}
}
// allow zGen to override or update zIndexes
// FDM, CAM, Laser slicers will use this to align or interpolate layers
if (zGen) {
zIndexes = zGen({ zMin, zMax, zLine, zFlat, zIndexes, options });
}
/**
* bucket polygons into z-bounded groups (inside or crossing)
* to reduce the search space in complex models
@ -189,10 +204,15 @@ async function slice(points, options = {}) {
let count = 0;
let opt = { ...options, zMin, zMax };
for (let bucket of buckets) {
for (let i = 0, l = buckets.length; i < l; i++) {
let bucket = buckets[i];
let { points, slices } = bucket;
for (let z of slices) {
output.push(await sliceFn(z, points, opt));
output.push(await sliceFn(z, points, {
...opt,
bucket: i, // pass which bucket we are (sharding)
buckets: l // pass total bucket count (sharding)
}));
onupdate(0.1 + (count++ / zIndexes.length) * 0.9);
}
}