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added new triangle decimation

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CNCKitchen
2026-03-17 10:16:50 +01:00
parent 66ee4a2d7d
commit 1a23d7d7fa
4 changed files with 480 additions and 33 deletions
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js/main.js
+24 -12
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@@ -4,6 +4,7 @@ import { PRESETS, loadCustomTexture } from './presetTextures.js';
import { createPreviewMaterial, updateMaterial } from './previewMaterial.js';
import { subdivide } from './subdivision.js';
import { applyDisplacement } from './displacement.js';
import { decimate } from './decimation.js';
import { exportSTL } from './exporter.js';
// ── State ─────────────────────────────────────────────────────────────────────
@@ -311,17 +312,13 @@ async function handleExport() {
try {
setProgress(0.02, 'Subdividing mesh…');
// Run subdivision synchronously (may take a few seconds on large meshes)
// Wrap in a small yielding loop to allow the browser to repaint the progress bar.
const { geometry: subdivided, limitReached } = await runAsync(() =>
subdivide(currentGeometry, settings.refineLength, settings.maxTriangles,
(p) => setProgress(p * 0.6, 'Subdividing mesh…'))
const { geometry: subdivided, safetyCapHit } = await runAsync(() =>
subdivide(currentGeometry, settings.refineLength,
(p) => setProgress(0.02 + p * 0.35, 'Subdividing mesh…'))
);
triLimitWarning.classList.toggle('hidden', !limitReached);
const subTriCount = subdivided.attributes.position.count / 3;
setProgress(0.62, `Applying displacement to ${subTriCount.toLocaleString()} triangles…`);
setProgress(0.38, `Applying displacement to ${subTriCount.toLocaleString()} triangles…`);
const displaced = await runAsync(() =>
applyDisplacement(
@@ -331,15 +328,30 @@ async function handleExport() {
activeMapEntry.height,
settings,
currentBounds,
(p) => setProgress(0.62 + p * 0.35, `Displacing vertices…`)
(p) => setProgress(0.38 + p * 0.32, `Displacing vertices…`)
)
);
setProgress(0.98, 'Writing STL…');
const dispTriCount = displaced.attributes.position.count / 3;
const needsDecimation = dispTriCount > settings.maxTriangles;
triLimitWarning.classList.toggle('hidden', !safetyCapHit);
let finalGeometry = displaced;
if (needsDecimation) {
setProgress(0.71, `Decimating ${dispTriCount.toLocaleString()} → ${settings.maxTriangles.toLocaleString()} triangles…`);
finalGeometry = await runAsync(() =>
decimate(
displaced,
settings.maxTriangles,
(p) => setProgress(0.71 + p * 0.25, `Decimating mesh…`)
)
);
}
setProgress(0.97, 'Writing STL…');
await yieldFrame();
const baseName = 'textured';
exportSTL(displaced, `${baseName}.stl`);
exportSTL(finalGeometry, 'textured.stl');
setProgress(1.0, 'Done!');
setTimeout(() => {