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add early noodle visualization to thin3

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This commit is contained in:
Stewart Allen 2025-07-27 23:52:29 -04:00
commit a32edadb4a
1 changed files with 56 additions and 13 deletions
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69
src/kiri/mode/fdm/post.js
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@ -2,6 +2,7 @@
import '../../../ext/jspoly.js';
import { base } from '../../../geo/base.js';
import { newPolygon } from '../../../geo/polygon.js';
import { polygons as POLY, fillArea } from '../../../geo/polygons.js';
import { getRangeParameters } from './driver.js';
import { slicer } from '../../../geo/slicer.js';
@ -166,14 +167,15 @@ function thin_type_3(params) {
top.thin_fill = [];
top.fill_sparse = [];
let { noodle, remain } = top.poly.noodle(offsetN * 2);
let { noodle, remain } = top.poly.noodle(offsetN * count);
top.shells = noodle;
top.gaps = remain;
top.gaps = last = remain;
let thin = top.thin_fill;
let scale = 5000;
let minR = offsetN / 2;
let minSpur = 0;//offsetN * 3;
let maxR = minR * 1.5;
let minSpur = 0; // offsetN * 3;
let pointMap = new Map();
let lineMap = new Map();
@ -288,7 +290,31 @@ function thin_type_3(params) {
}
}
let showMid = false;
let showCross = false;
let showRad = true;
function div(cr) {
if (cr <= maxR) {
return [ cr ];
} else if (cr <= maxR * 2) {
return [ cr / 2, cr / 2 ];
} else if (cr <= maxR * 3) {
let rem = cr - minR * 2;
if (rem < maxR) {
return [ minR, rem, minR ];
} else {
return [ minR, rem / 2, rem / 2, minR ];
}
} else {
return [ minR, ...div(cr - minR * 2), minR ];
}
}
// add chains to thinwall output for visualization
if (showRad) {
top.shells = [];
}
for (let chain of chains.filter(c => c.total >= minR)) {
// chain reduction by merging short segments
let end = chain[0];
@ -305,8 +331,10 @@ function thin_type_3(params) {
// emit chain with subdivision for long segments
for (let i=0; i<chain.length-1; i++) {
// medial axis segment
thin.push(new Point(chain[i].x, chain[i].y));
thin.push(new Point(chain[i+1].x, chain[i+1].y));
if (showMid) {
thin.push(new Point(chain[i].x, chain[i].y));
thin.push(new Point(chain[i+1].x, chain[i+1].y));
}
// compute medial axis segment cross section
let p0 = chain[i];
let p1 = chain[i+1];
@ -321,13 +349,29 @@ function thin_type_3(params) {
// interpolate across the length of the chain segment
for (let off of offs) {
let inc = (indx++ * step);
let cp = {
r: p0.r + dr * inc,
x: p0.x + dx * inc,
y: p0.y + dy * inc
};
thin.push(new Point(cp.x + ndy * cp.r, cp.y - ndx * cp.r));
thin.push(new Point(cp.x - ndy * cp.r, cp.y + ndx * cp.r));
let cr = p0.r + dr * inc;
let cx = p0.x + dx * inc;
let cy = p0.y + dy * inc;
let xo = ndx * cr;
let yo = ndy * cr;
if (showCross) {
thin.push(new Point(cx + yo, cy - xo));
thin.push(new Point(cx - yo, cy + xo));
}
if (showRad) {
let circ = top.shells;
let pop = div(cr);
let sx = cx + yo;
let sy = cy - xo;
let m = 1;
for (let r of pop) {
sx -= (r/cr) * yo * m;
sy += (r/cr) * xo * m;
circ.push(newPolygon().centerCircle({ x:sx, y:sy }, r, 10));
m = 2;
}
// console.log(pop);
}
}
}
}
@ -384,7 +428,6 @@ export function doTopShells(z, top, count, offset1, offsetN, fillOffset, opt = {
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 });