grid-apps-cmms/src2/kiri-mode/fdm/post.js
2025-07-05 00:48:53 -04:00

313 lines
10 KiB
JavaScript

/** Copyright Stewart Allen <sa@grid.space> -- All Rights Reserved */
import { base } from '../../geo/base.js';
import { polygons as POLY, fillArea } from '../../geo/polygons.js';
import { getRangeParameters } from './driver.js';
import { slicer } from '../../geo/slicer.js';
slicer.slicePost.FDM = slicePost;
/**
* may run in minion or worker context. do not create objects
* that will not quickly encode in threaded mode. add to existing
* data object. return is ignored.
*/
export function slicePost(data, options) {
const { z, lines, groups } = data;
const { useAssembly, post_args, zIndexes } = options;
const { process, isSynth, vaseMode } = post_args;
const { shellOffset, fillOffset, clipOffset } = post_args;
data.tops = POLY.nest(groups);
if (isSynth) {
const process = post_args.process;
if (process.sliceSupportGrow > 0) {
// expand synth supports here so they can be clipped later
data.tops = POLY.expand(data.tops, process.sliceSupportGrow, data.z, []);
}
// do not shell synth widgets because
// they will be clipped against peers later
// which requires shelling post-clip
// but we still need to generate tops
delete data.groups;
return;
}
const index = zIndexes.indexOf(z);
const range = getRangeParameters(process, index);
// calculate fractional shells
let shellFrac = (range.sliceShells - (range.sliceShells | 0));
let sliceShells = range.sliceShells | 0;
if (shellFrac) {
let v1 = shellFrac > 0.5 ? 1 - shellFrac : shellFrac;
let v2 = 1 - v1;
let parts = Math.round(v2/v1) + 1;
let rem = index % parts;
let trg = shellFrac > 0.5 ? 1 : parts - 1;
sliceShells += rem >= trg ? 1 : 0;
}
const isFirst = index === 0;
const height = process.sliceHeight;
const spaceMult = isFirst ? process.firstLayerLineMult || 1 : 1;
const count = isSynth ? 1 : sliceShells;
const offset = shellOffset * spaceMult;
const fillOff = fillOffset * spaceMult;
const thinType = isSynth ? undefined : process.sliceDetectThin;
const nutops = [];
// co-locate shell processing with top generation in slicer
for (let top of data.tops) {
nutops.push(doTopShells(z, top, count, offset/2, offset, fillOff, {
thinType,
vaseMode,
useAssembly
}));
}
data.clip = clipOffset ? POLY.offset(nutops.map(t => t.simple), clipOffset) : undefined;
data.tops = nutops;
delete data.groups;
};
function offset_default(params) {
let { z, top, count, top_poly, offset1, offsetN, wasm, last, gaps } = params;
// standard wall offsetting strategy
POLY.offset(
top_poly,
[-offset1, -offsetN],
{
z,
wasm,
count,
outs: top.shells,
flat: true,
call: (polys, onCount) => {
last = polys;
// mark each poly with depth (offset #) starting at 0
for (let p of polys) {
p.depth = count - onCount;
if (p.fill_off) p.fill_off.forEach(function(pi) {
// use negative offset for inners
pi.depth = -(count - onCount);
});
// mark inner depth to match parent
if (p.inner) {
for (let pi of p.inner) {
pi.depth = p.depth;
}
}
}
}
}
);
return { last, gaps };
}
function thin_type_1(params) {
let { z, top, count, top_poly, offsetN, last, gaps } = params;
top.thin_fill = [];
top.fill_sparse = [];
let layers = POLY.inset(top_poly, offsetN, count, z, true);
last = layers.last().mid;
top.shells = layers.map(r => r.mid).flat();
top.gaps = layers.map(r => r.gap).flat();
let off = offsetN;
let min = off * 0.75;
let max = off * 4;
for (let poly of layers.map(r => r.gap).flat()) {
let centers = poly.centers(off/2, z, min, max, {lines:false});
top.fill_sparse.appendAll(centers);
}
return { last, gaps };
}
function thin_type_2(params) {
let { z, top, count, top_poly, offset1, offsetN, last, gaps, wasm } = params;
top.gaps = gaps;
top.thin_fill = [];
let oso = {z, count, gaps: [], outs: [], minArea: 0.05, wasm};
POLY.offset(top_poly, [-offset1, -offsetN], oso);
oso.outs.forEach((polys, i) => {
polys.forEach(p => {
p.depth = i;
if (p.fill_off) {
p.fill_off.forEach(pi => pi.depth = i);
}
if (p.inner) {
for (let pi of p.inner) {
pi.depth = p.depth;
}
}
top.shells.push(p);
});
last = polys;
});
// slice.solids.trimmed = slice.solids.trimmed || [];
oso.gaps.forEach((polys, i) => {
let off = (i == 0 ? offset1 : offsetN);
polys = POLY.offset(polys, -off * 0.8, {z, minArea: 0, wasm});
top.thin_fill.appendAll(cullIntersections(
fillArea(polys, 45, off/2, [], 0.01, off*2),
fillArea(polys, 135, off/2, [], 0.01, off*2),
));
gaps.push(...polys);
});
return { last, gaps };
}
function thin_type_3(params) {
let { z, top, count, offsetN, last, gaps } = params;
top.thin_fill = [];
top.fill_sparse = [];
let { noodle, remain } = top.poly.noodle(offsetN);
top.shells = noodle;
top.gaps = remain;
// top.fill_off = noodle;
// if (remain.length) {
// top.gaps = [];
// for (let poly of remain) {
// let { noodle } = poly.noodle(offsetN);
// console.log({ next_noodle: noodle });
// top.gaps.push(...noodle);
// }
// }
return { last, gaps };
}
/**
* may run in minion or worker context. performs shell offsetting
* including thin wall detection when enabled
*/
export function doTopShells(z, top, count, offset1, offsetN, fillOffset, opt = {}) {
// pretend we're a top object in minions
if (!top.poly) {
top = { poly: top };
}
// add simple (low rez poly) where less accuracy is OK
top.simple = top.poly.simple();
let wasm = opt.useAssembly;
let top_poly = [ top.poly ];
if (opt.vaseMode) {
// remove top poly inners in vase mode
top.poly = top.poly.clone(false);
}
top.shells = []; // strategies output shells here
top.fill_off = []; // offset from innermost shell for infill
top.fill_lines = []; // fill lines inside fill_off
let last = [],
gaps = [];
if (count) {
// permit offset of 0 for laser and drag knife
if (offset1 === 0 && count === 1) {
last = top_poly.clone(true);
top.shells = last;
} else {
// heal top open polygons if the ends are close (benchy tilt test)
top_poly.forEach(p => { if (p.open) {
let dist = p.first().distTo2D(p.last());
if (dist < 1) p.open = false;
} });
let ret = { last, gaps };
switch (opt.thinType) {
case "type 1":
ret = thin_type_1({ z, top, count, top_poly, offsetN, fillOffset });
break;
case "type 2":
ret = thin_type_2({ z, top, count, top_poly, offset1, offsetN, fillOffset, gaps, wasm });
break;
case "type 3":
ret = thin_type_3({ z, top, count, top_poly, offsetN });
fillOffset = 0;
break;
default:
ret = offset_default({ z, top, count, top_poly, offset1, offsetN, wasm });
break;
}
last = ret.last || last;
gaps = ret.gaps || gaps;
}
} else {
// no shells, just infill, is permitted
last = [top.poly];
}
// generate fill offset poly set from last offset to top.fill_off
if (fillOffset && last.length > 0) {
// if gaps present, remove that area from fill inset
if (gaps.length) {
let nulast = [];
POLY.subtract(last, gaps, nulast, null, z);
last = nulast;
}
last.forEach(function(inner) {
POLY.offset([inner], -fillOffset, {outs: top.fill_off, flat: true, z});
});
}
// for diffing
top.last = last;
// top.last_simple = last.map(p => p.clean(true, undefined, config.clipper / 10));
return top;
}
/**
* given an array of arrays of points (lines), eliminate intersections
* between groups, then return a unified array of shortest non-intersects.
*/
function cullIntersections() {
function toLines(pts) {
let lns = [];
for (let i=0, il=pts.length; i<il; i += 2) {
lns.push({a: pts[i], b: pts[i+1], l: pts[i].distTo2D(pts[i+1])});
}
return lns;
}
let aOa = [...arguments].filter(t => t);
if (aOa.length < 1) return;
let aa = toLines(aOa.shift());
while (aOa.length) {
let bb = toLines(aOa.shift());
loop: for (let i=0, il=aa.length; i<il; i++) {
let al = aa[i];
if (al.del) {
continue;
}
for (let j=0, jl=bb.length; j<jl; j++) {
let bl = bb[j];
if (bl.del) {
continue;
}
if (base.util.intersect(al.a, al.b, bl.a, bl.b, base.key.SEGINT)) {
if (al.l < bl.l) {
bl.del = true;
} else {
al.del = true;
}
continue;
}
}
}
aa = aa.filter(l => !l.del).concat(bb.filter(l => !l.del));
}
let good = [];
for (let i=0, il=aa.length; i<il; i++) {
let al = aa[i];
good.push(al.a);
good.push(al.b);
}
return good.length > 2 ? good : [];
}