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add micro offsetting for visualization

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This commit is contained in:
Stewart Allen 2025-09-16 14:49:30 -04:00
commit 2cad3f0e18
1 changed files with 46 additions and 19 deletions
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65
src/kiri/mode/fdm/post.js
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@ -169,19 +169,46 @@ function thin_type_3(params) {
// produce trace from outside of poly inward no more than max inset // produce trace from outside of poly inward no more than max inset
let { noodle, remain } = top.poly.noodle(offsetN * count); let { noodle, remain } = top.poly.noodle(offsetN * count);
top.gaps = remain;
let thin = top.thin_fill = []; let thin = top.thin_fill = [];
let shells = top.shells;
let sparse = top.fill_sparse = []; let sparse = top.fill_sparse = [];
let scale = 1000; let scale = 1000;
let midR = offsetN * 0.5; let midR = offsetN * 0.5;
let minR = midR * 0.75; let minR = midR * 0.75;
let maxR = midR * 1.5; let maxR = midR * 1.5;
let minSpur = offsetN * 2; let minSpur = offsetN * 1;
// top.shells = noodle; if (false) {
top.gaps = last = remain; let dtotl = 0;
let dstep = minR / 2;
let inset = POLY.expand(noodle, -dstep);
while (inset && inset.length) {
dtotl += dstep;
let ps = POLY.flatten(inset);
for (let poly of ps) {
for (let p of poly.segment(minR).points) {
let d = dtotl * 0+0.05;
// let z = dtotl * 10;
shells.append( newPolygon().centerCircle(p, d, 10).setZ(z) );
}
}
POLY.setZ(inset, z);
shells.appendAll(inset);
if (dtotl >= maxR) {
break;
}
inset = POLY.expand(inset, -dstep);
}
}
// shells.appendAll(noodle);
// return { last, gaps };
let showNoodle = false; let showNoodle = false;
let mergeChains = true; let mergeChains = true;
let shortenAtNexus = false;
let interpolateShortSpur = true; let interpolateShortSpur = true;
let showChainRawPoints = false; let showChainRawPoints = false;
let showChainInterpPoints = true; let showChainInterpPoints = true;
@ -332,7 +359,7 @@ function thin_type_3(params) {
// render inset "noodle" // render inset "noodle"
if (showNoodle) { if (showNoodle) {
top.shells.appendAll(noodle); shells.appendAll(noodle);
} }
// divide a segment/redius into 1 or more equal subsegments // divide a segment/redius into 1 or more equal subsegments
@ -457,6 +484,7 @@ function thin_type_3(params) {
} }
// shorten chains terminating at nexus by midR // shorten chains terminating at nexus by midR
if (shortenAtNexus)
for (let rec of Object.values(nexus)) { for (let rec of Object.values(nexus)) {
let { point } = rec; let { point } = rec;
rec.shorts = 0; rec.shorts = 0;
@ -477,7 +505,7 @@ function thin_type_3(params) {
if (showNexuses) if (showNexuses)
for (let rec of Object.values(nexus)) { for (let rec of Object.values(nexus)) {
let { point } = rec; let { point } = rec;
top.shells.push(newPolygon().centerCircle(point, 0.2, 6 - rec.shorts)); shells.push(newPolygon().centerCircle(point, 0.2, 6 - rec.shorts));
} }
function renderPointNormal(pt, ndx, ndy) { function renderPointNormal(pt, ndx, ndy) {
@ -490,14 +518,13 @@ function thin_type_3(params) {
if (showMidRadii) { if (showMidRadii) {
const Sx = pt.x + ndy * pt.r; const Sx = pt.x + ndy * pt.r;
const Sy = pt.y - ndx * pt.r; const Sy = pt.y - ndx * pt.r;
const circ = top.shells;
const pop = div(pt.r); const pop = div(pt.r);
let acc = 0; let acc = 0;
for (let r of pop) { for (let r of pop) {
const t = acc + r; const t = acc + r;
const px = Sx + -ndy * t; const px = Sx + -ndy * t;
const py = Sy + ndx * t; const py = Sy + ndx * t;
circ.push(newPolygon().centerCircle({x:px, y:py}, r, 10)); shells.push(newPolygon().centerCircle({x:px, y:py}, r, 10));
acc += r * 2; acc += r * 2;
} }
} }
@ -509,7 +536,7 @@ function thin_type_3(params) {
// zi += 0.1; // zi += 0.1;
if (showChainRawPoints) if (showChainRawPoints)
for (let pt of chain) { for (let pt of chain) {
top.shells.push(newPolygon().centerCircle(pt, pt.r ?? 0.1, 10)); shells.push(newPolygon().centerCircle(pt, pt.r ?? 0.1, 10));
} }
// draw medial axis chain // draw medial axis chain
let { closed, length } = chain; let { closed, length } = chain;
@ -525,14 +552,14 @@ function thin_type_3(params) {
thin.push(new Point(p1.x, p1.y, zi)); thin.push(new Point(p1.x, p1.y, zi));
} }
// compute medial axis segment normal // compute medial axis segment normal
let offs = len <= midR ? [ 0 ] : base.util.lerp(0, len, midR, true); let steps = Math.ceil(len / midR) + 1;
let step = 1 / offs.length; let step = 1 / steps;
let dr = (p1.r - p0.r); let dr = (p1.r - p0.r);
let dx = (p1.x - p0.x); let dx = (p1.x - p0.x);
let dy = (p1.y - p0.y); let dy = (p1.y - p0.y);
let ndx = dx / len; let ndx = dx / len;
let ndy = dy / len; let ndy = dy / len;
segs.push({ p0, p1, offs, step, dr, dx, dy, ndx, ndy }); segs.push({ p0, p1, steps, step, dr, dx, dy, ndx, ndy });
} }
// compute chain subdivisions // compute chain subdivisions
@ -540,7 +567,7 @@ function thin_type_3(params) {
for (let si=0; si<slen; si++) { for (let si=0; si<slen; si++) {
let seg = segs[si]; let seg = segs[si];
let segp = segs[(si - 1 + slen) % slen]; let segp = segs[(si - 1 + slen) % slen];
let { p0, p1, offs, step, dr, dx, dy, ndx, ndy } = seg; let { p0, p1, steps, step, dr, dx, dy, ndx, ndy } = seg;
let first = si === 0; let first = si === 0;
let last = si === slen - 1; let last = si === slen - 1;
let mid = !(first || last); let mid = !(first || last);
@ -548,19 +575,19 @@ function thin_type_3(params) {
if (showMidPoints) { if (showMidPoints) {
if (first) { if (first) {
// todo: handle closed // todo: handle closed
top.shells.push(newPolygon().centerCircle(p0, 0.08, 10)); shells.push(newPolygon().centerCircle(p0, 0.08, 10));
} }
if (mid) { if (mid) {
// mid segments // mid segments
top.shells.push(newPolygon().centerCircle(p0, 0.08, 10)); shells.push(newPolygon().centerCircle(p0, 0.08, 10));
} }
if (last) { if (last) {
// todo: handle closed // todo: handle closed
top.shells.push(newPolygon().centerCircle(p0, 0.08, 10)); shells.push(newPolygon().centerCircle(p0, 0.08, 10));
if (closed) { if (closed) {
console.log('closed'); console.log('closed');
} else { } else {
top.shells.push(newPolygon().centerCircle(p1, 0.08, 10)); shells.push(newPolygon().centerCircle(p1, 0.08, 10));
} }
} }
} }
@ -578,7 +605,7 @@ function thin_type_3(params) {
} }
// interpolate across the length of the chain segment // interpolate across the length of the chain segment
if (showChainInterpPoints) if (showChainInterpPoints)
for (let indx = 1; indx < offs.length; indx++) { for (let indx = 1; indx < steps; indx++) {
const inc = indx * step; const inc = indx * step;
const cr = p0.r + dr * inc; const cr = p0.r + dr * inc;
const cx = p0.x + dx * inc; const cx = p0.x + dx * inc;
@ -593,8 +620,8 @@ function thin_type_3(params) {
} }
} }
POLY.setZ([...thin, ...top.shells], z); POLY.setZ([...thin, ...shells], z);
// POLY.setZ([...top.shells], z); // POLY.setZ([...shells], z);
return { last, gaps }; return { last, gaps };
} }