mirror of
https://github.com/CNCKitchen/stlTexturizer.git
synced 2026-04-07 22:11:32 +00:00
CNCKitchen
691 lines
28 KiB
JavaScript
691 lines
28 KiB
JavaScript
import * as THREE from 'three';
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import { initViewer, loadGeometry, setMeshMaterial, setWireframe,
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getControls, getCamera, getCurrentMesh,
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setExclusionOverlay, setHoverPreview } from './viewer.js';
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import { loadSTLFile, computeBounds, getTriangleCount } from './stlLoader.js';
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import { PRESETS, loadCustomTexture } from './presetTextures.js';
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import { createPreviewMaterial, updateMaterial } from './previewMaterial.js';
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import { subdivide } from './subdivision.js';
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import { applyDisplacement } from './displacement.js';
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import { decimate } from './decimation.js';
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import { exportSTL } from './exporter.js';
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import { buildAdjacency, bucketFill,
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buildExclusionOverlayGeo, buildFaceWeights } from './exclusion.js';
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// ── State ─────────────────────────────────────────────────────────────────────
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let currentGeometry = null; // original loaded geometry
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let currentBounds = null; // bounds of the original geometry
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let activeMapEntry = null; // { name, texture, imageData, width, height }
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let previewMaterial = null;
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let isExporting = false;
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let previewDebounce = null;
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// ── Exclusion state ───────────────────────────────────────────────────────────
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let excludedFaces = new Set(); // triangle indices in currentGeometry
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let triangleAdjacency = null; // Map from buildAdjacency
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let triangleCentroids = null; // Float32Array from buildAdjacency
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let exclusionTool = null; // 'brush' | 'bucket' | null
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let eraseMode = false;
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let brushIsRadius = false;
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let brushRadius = 5.0;
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let bucketThreshold = 30;
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let isPainting = false;
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let _lastHoverTriIdx = -1; // last triangle index used for hover preview
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const _raycaster = new THREE.Raycaster();
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const settings = {
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mappingMode: 6, // Cubic default
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scaleU: 1.0,
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scaleV: 1.0,
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amplitude: 0.5,
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offsetU: 0.0,
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offsetV: 0.0,
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refineLength: 1.0,
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maxTriangles: 1_000_000,
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lockScale: true,
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bottomAngleLimit: 5,
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topAngleLimit: 0,
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};
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// ── DOM refs ──────────────────────────────────────────────────────────────────
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const canvas = document.getElementById('viewport');
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const dropZone = document.getElementById('drop-zone');
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const dropHint = document.getElementById('drop-hint');
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const stlFileInput = document.getElementById('stl-file-input');
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const textureInput = document.getElementById('texture-file-input');
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const presetGrid = document.getElementById('preset-grid');
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const activeMapName = document.getElementById('active-map-name');
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const meshInfo = document.getElementById('mesh-info');
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const exportBtn = document.getElementById('export-btn');
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const exportProgress = document.getElementById('export-progress');
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const exportProgBar = document.getElementById('export-progress-bar');
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const exportProgLbl = document.getElementById('export-progress-label');
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const triLimitWarning = document.getElementById('tri-limit-warning');
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const wireframeToggle = document.getElementById('wireframe-toggle');
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const mappingSelect = document.getElementById('mapping-mode');
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const scaleUSlider = document.getElementById('scale-u');
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const scaleVSlider = document.getElementById('scale-v');
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const lockScaleBtn = document.getElementById('lock-scale');
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const offsetUSlider = document.getElementById('offset-u');
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const offsetVSlider = document.getElementById('offset-v');
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const amplitudeSlider = document.getElementById('amplitude');
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const refineLenSlider = document.getElementById('refine-length');
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const maxTriSlider = document.getElementById('max-triangles');
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const scaleUVal = document.getElementById('scale-u-val');
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const scaleVVal = document.getElementById('scale-v-val');
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const offsetUVal = document.getElementById('offset-u-val');
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const offsetVVal = document.getElementById('offset-v-val');
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const amplitudeVal = document.getElementById('amplitude-val');
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const refineLenVal = document.getElementById('refine-length-val');
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const maxTriVal = document.getElementById('max-triangles-val');
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const bottomAngleLimitSlider = document.getElementById('bottom-angle-limit');
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const topAngleLimitSlider = document.getElementById('top-angle-limit');
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const bottomAngleLimitVal = document.getElementById('bottom-angle-limit-val');
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const topAngleLimitVal = document.getElementById('top-angle-limit-val');
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// ── Exclusion panel DOM refs ──────────────────────────────────────────────────
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const exclBrushBtn = document.getElementById('excl-brush-btn');
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const exclBucketBtn = document.getElementById('excl-bucket-btn');
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const exclEraseToggle = document.getElementById('excl-erase-toggle');
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const exclBrushTypeRow = document.getElementById('excl-brush-type-row');
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const exclBrushSingleBtn = document.getElementById('excl-brush-single');
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const exclBrushRadiusBtn = document.getElementById('excl-brush-radius-btn');
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const exclRadiusRow = document.getElementById('excl-radius-row');
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const exclBrushRadiusSlider = document.getElementById('excl-brush-radius-slider');
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const exclBrushRadiusVal = document.getElementById('excl-brush-radius-val');
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const exclThresholdRow = document.getElementById('excl-threshold-row');
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const exclThresholdSlider = document.getElementById('excl-threshold-slider');
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const exclThresholdVal = document.getElementById('excl-threshold-val');
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const exclCount = document.getElementById('excl-count');
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const exclClearBtn = document.getElementById('excl-clear-btn');
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// ── Scale slider log helpers ──────────────────────────────────────────────────
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// Slider stores 0–1000; actual scale spans 0.1–10 on a log axis.
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// Middle position 500 → scale 1.0 (exact midpoint on log scale).
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const _LOG_MIN = Math.log(0.1);
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const _LOG_MAX = Math.log(10);
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const scaleToPos = v => Math.round((Math.log(Math.max(0.1, Math.min(10, v))) - _LOG_MIN) / (_LOG_MAX - _LOG_MIN) * 1000);
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const posToScale = p => parseFloat(Math.exp(_LOG_MIN + (p / 1000) * (_LOG_MAX - _LOG_MIN)).toFixed(1));
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// ── Init ──────────────────────────────────────────────────────────────────────
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initViewer(canvas);
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buildPresetGrid();
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wireEvents();
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// Sync scale number inputs with the slider's initial position
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scaleUVal.value = posToScale(parseFloat(scaleUSlider.value));
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scaleVVal.value = posToScale(parseFloat(scaleVSlider.value));
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// ── Preset grid ───────────────────────────────────────────────────────────────
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function buildPresetGrid() {
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PRESETS.forEach((preset, idx) => {
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const swatch = document.createElement('div');
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swatch.className = 'preset-swatch';
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swatch.title = preset.name;
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// Use the small thumbnail canvas
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swatch.appendChild(preset.thumbCanvas);
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const label = document.createElement('span');
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label.className = 'preset-label';
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label.textContent = preset.name;
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swatch.appendChild(label);
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swatch.addEventListener('click', () => selectPreset(idx, swatch));
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presetGrid.appendChild(swatch);
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});
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}
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function selectPreset(idx, swatchEl) {
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document.querySelectorAll('.preset-swatch').forEach(s => s.classList.remove('active'));
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swatchEl.classList.add('active');
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activeMapEntry = PRESETS[idx];
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activeMapName.textContent = PRESETS[idx].name;
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updatePreview();
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}
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// ── Event wiring ──────────────────────────────────────────────────────────────
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function wireEvents() {
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// ── STL loading ──
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stlFileInput.addEventListener('change', (e) => {
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if (e.target.files[0]) handleSTL(e.target.files[0]);
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});
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// Drag & drop on the viewport section
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dropZone.addEventListener('dragover', (e) => {
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e.preventDefault();
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dropZone.classList.add('drag-over');
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});
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dropZone.addEventListener('dragleave', () => dropZone.classList.remove('drag-over'));
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dropZone.addEventListener('drop', (e) => {
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e.preventDefault();
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dropZone.classList.remove('drag-over');
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const file = [...e.dataTransfer.files].find(f => f.name.toLowerCase().endsWith('.stl'));
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if (file) handleSTL(file);
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});
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// Allow clicking the drop zone to open the file picker (except on canvas)
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dropZone.addEventListener('click', (e) => {
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if (e.target === dropZone) stlFileInput.click();
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});
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// ── Custom texture upload ──
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textureInput.addEventListener('change', async (e) => {
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const file = e.target.files[0];
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if (!file) return;
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try {
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activeMapEntry = await loadCustomTexture(file);
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activeMapName.textContent = file.name;
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document.querySelectorAll('.preset-swatch').forEach(s => s.classList.remove('active'));
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updatePreview();
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} catch (err) {
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console.error('Failed to load texture:', err);
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}
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});
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// ── Settings ──
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mappingSelect.addEventListener('change', () => {
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settings.mappingMode = parseInt(mappingSelect.value, 10);
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updatePreview();
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});
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// Scale U — when lock is on, mirror to V
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const applyScaleU = (v) => {
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v = Math.max(0.1, Math.min(10, v));
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settings.scaleU = v;
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scaleUSlider.value = scaleToPos(v);
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scaleUVal.value = v;
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if (settings.lockScale) { settings.scaleV = v; scaleVSlider.value = scaleToPos(v); scaleVVal.value = v; }
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clearTimeout(previewDebounce); previewDebounce = setTimeout(updatePreview, 80);
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};
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scaleUSlider.addEventListener('input', () => applyScaleU(posToScale(parseFloat(scaleUSlider.value))));
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scaleUVal.addEventListener('change', () => applyScaleU(parseFloat(scaleUVal.value)));
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// Scale V — when lock is on, mirror to U
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const applyScaleV = (v) => {
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v = Math.max(0.1, Math.min(10, v));
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settings.scaleV = v;
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scaleVSlider.value = scaleToPos(v);
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scaleVVal.value = v;
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if (settings.lockScale) { settings.scaleU = v; scaleUSlider.value = scaleToPos(v); scaleUVal.value = v; }
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clearTimeout(previewDebounce); previewDebounce = setTimeout(updatePreview, 80);
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};
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scaleVSlider.addEventListener('input', () => applyScaleV(posToScale(parseFloat(scaleVSlider.value))));
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scaleVVal.addEventListener('change', () => applyScaleV(parseFloat(scaleVVal.value)));
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// Lock toggle
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lockScaleBtn.addEventListener('click', () => {
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settings.lockScale = !settings.lockScale;
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lockScaleBtn.classList.toggle('active', settings.lockScale);
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lockScaleBtn.setAttribute('aria-pressed', String(settings.lockScale));
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if (settings.lockScale) {
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settings.scaleV = settings.scaleU;
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scaleVSlider.value = scaleToPos(settings.scaleU);
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scaleVVal.value = settings.scaleU;
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updatePreview();
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}
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});
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linkSlider(offsetUSlider, offsetUVal, v => { settings.offsetU = v; return v.toFixed(2); });
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linkSlider(offsetVSlider, offsetVVal, v => { settings.offsetV = v; return v.toFixed(2); });
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linkSlider(amplitudeSlider, amplitudeVal, v => { settings.amplitude = v; return v.toFixed(2); });
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linkSlider(refineLenSlider, refineLenVal, v => { settings.refineLength = v; return v.toFixed(1); }, false);
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linkSlider(maxTriSlider, maxTriVal, v => { settings.maxTriangles = v; return formatM(v); }, false);
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linkSlider(bottomAngleLimitSlider, bottomAngleLimitVal, v => { settings.bottomAngleLimit = v; return v; });
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linkSlider(topAngleLimitSlider, topAngleLimitVal, v => { settings.topAngleLimit = v; return v; });
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// ── Export ──
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exportBtn.addEventListener('click', handleExport);
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// ── Wireframe ──
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wireframeToggle.addEventListener('change', () => setWireframe(wireframeToggle.checked));
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// ── Exclusion tool wiring ─────────────────────────────────────────────────
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exclBrushBtn.addEventListener('click', () => setExclusionTool('brush'));
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exclBucketBtn.addEventListener('click', () => setExclusionTool('bucket'));
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exclEraseToggle.addEventListener('click', () => {
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eraseMode = !eraseMode;
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exclEraseToggle.classList.toggle('active', eraseMode);
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exclEraseToggle.setAttribute('aria-pressed', String(eraseMode));
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});
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exclBrushSingleBtn.addEventListener('click', () => {
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brushIsRadius = false;
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exclBrushSingleBtn.classList.add('active');
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exclBrushRadiusBtn.classList.remove('active');
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exclRadiusRow.classList.add('hidden');
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});
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exclBrushRadiusBtn.addEventListener('click', () => {
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brushIsRadius = true;
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exclBrushRadiusBtn.classList.add('active');
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exclBrushSingleBtn.classList.remove('active');
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if (exclusionTool === 'brush') exclRadiusRow.classList.remove('hidden');
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});
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exclBrushRadiusSlider.addEventListener('input', () => {
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brushRadius = parseFloat(exclBrushRadiusSlider.value);
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exclBrushRadiusVal.value = brushRadius;
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});
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exclBrushRadiusVal.addEventListener('change', () => {
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brushRadius = Math.max(0.1, Math.min(50, parseFloat(exclBrushRadiusVal.value) || 5));
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exclBrushRadiusSlider.value = brushRadius;
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exclBrushRadiusVal.value = brushRadius;
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});
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exclThresholdSlider.addEventListener('input', () => {
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bucketThreshold = parseFloat(exclThresholdSlider.value);
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exclThresholdVal.value = bucketThreshold;
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_lastHoverTriIdx = -1; // invalidate hover so next mousemove re-computes
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});
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exclThresholdVal.addEventListener('change', () => {
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bucketThreshold = Math.max(0, Math.min(180, parseFloat(exclThresholdVal.value) || 30));
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exclThresholdSlider.value = bucketThreshold;
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exclThresholdVal.value = bucketThreshold;
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_lastHoverTriIdx = -1;
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});
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exclClearBtn.addEventListener('click', () => {
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excludedFaces = new Set();
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refreshExclusionOverlay();
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});
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// ── Canvas mouse events for exclusion painting ────────────────────────────
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canvas.addEventListener('mousedown', (e) => {
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if (!currentGeometry || !exclusionTool || e.button !== 0) return;
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e.preventDefault();
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getControls().enabled = false;
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isPainting = true;
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if (exclusionTool === 'bucket') {
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const triIdx = pickTriangle(e);
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if (triIdx >= 0) {
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const filled = bucketFill(triIdx, triangleAdjacency, bucketThreshold);
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for (const t of filled) {
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if (eraseMode) excludedFaces.delete(t); else excludedFaces.add(t);
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}
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refreshExclusionOverlay();
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// Clear hover immediately so the confirmed orange overlay is fully visible
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_lastHoverTriIdx = -1;
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setHoverPreview(null);
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}
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isPainting = false;
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getControls().enabled = true;
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} else {
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paintAt(e);
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}
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});
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canvas.addEventListener('mousemove', (e) => {
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if (isPainting && exclusionTool === 'brush') {
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paintAt(e);
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return;
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}
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if (!isPainting && exclusionTool === 'bucket' && currentGeometry) {
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updateBucketHover(e);
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}
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});
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canvas.addEventListener('mouseleave', () => {
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_lastHoverTriIdx = -1;
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setHoverPreview(null);
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});
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document.addEventListener('mouseup', () => {
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if (!isPainting) return;
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isPainting = false;
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getControls().enabled = true;
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});
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document.addEventListener('keydown', (e) => {
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if (e.key === 'Escape' && exclusionTool) {
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setExclusionTool(null);
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}
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});
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}
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// ── Exclusion helpers ─────────────────────────────────────────────────────────
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function setExclusionTool(tool) {
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// Clicking the active tool toggles it off; passing null always deactivates
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exclusionTool = (exclusionTool === tool) ? null : tool;
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exclBrushBtn.classList.toggle('active', exclusionTool === 'brush');
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exclBucketBtn.classList.toggle('active', exclusionTool === 'bucket');
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// Show brush-type row only while brush is active
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exclBrushTypeRow.classList.toggle('hidden', exclusionTool !== 'brush');
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// Show radius row only while brush + radius mode is active
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exclRadiusRow.classList.toggle('hidden', !(exclusionTool === 'brush' && brushIsRadius));
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// Show threshold row only while bucket is active
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exclThresholdRow.classList.toggle('hidden', exclusionTool !== 'bucket');
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canvas.style.cursor = exclusionTool ? 'crosshair' : '';
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// Clear hover preview whenever the tool changes or is deactivated
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_lastHoverTriIdx = -1;
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setHoverPreview(null);
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// Re-enable controls if tool was deactivated mid-paint
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if (!exclusionTool) {
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isPainting = false;
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getControls().enabled = true;
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}
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}
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function _canvasNDC(e) {
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const rect = canvas.getBoundingClientRect();
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return new THREE.Vector2(
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((e.clientX - rect.left) / rect.width) * 2 - 1,
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((e.clientY - rect.top) / rect.height) * -2 + 1,
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);
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}
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function pickTriangle(e) {
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const mesh = getCurrentMesh();
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if (!mesh) return -1;
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_raycaster.setFromCamera(_canvasNDC(e), getCamera());
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const hits = _raycaster.intersectObject(mesh);
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return hits.length > 0 ? hits[0].faceIndex : -1;
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}
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function paintAt(e) {
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const mesh = getCurrentMesh();
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if (!mesh) return;
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_raycaster.setFromCamera(_canvasNDC(e), getCamera());
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const hits = _raycaster.intersectObject(mesh);
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if (hits.length === 0) return;
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const triIdx = hits[0].faceIndex;
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if (brushIsRadius) {
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const hitPt = hits[0].point;
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const triCount = triangleCentroids.length / 3;
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const r2 = brushRadius * brushRadius;
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for (let t = 0; t < triCount; t++) {
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const dx = triangleCentroids[t * 3] - hitPt.x;
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const dy = triangleCentroids[t * 3 + 1] - hitPt.y;
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const dz = triangleCentroids[t * 3 + 2] - hitPt.z;
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if (dx * dx + dy * dy + dz * dz <= r2) {
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if (eraseMode) excludedFaces.delete(t); else excludedFaces.add(t);
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}
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}
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} else {
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if (eraseMode) excludedFaces.delete(triIdx); else excludedFaces.add(triIdx);
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}
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refreshExclusionOverlay();
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}
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function refreshExclusionOverlay() {
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if (!currentGeometry) return;
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setExclusionOverlay(buildExclusionOverlayGeo(currentGeometry, excludedFaces));
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const n = excludedFaces.size;
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exclCount.textContent = `${n.toLocaleString()} face${n === 1 ? '' : 's'} excluded`;
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}
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function updateBucketHover(e) {
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const triIdx = pickTriangle(e);
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if (triIdx === _lastHoverTriIdx) return; // unchanged — skip expensive BFS
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_lastHoverTriIdx = triIdx;
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if (triIdx < 0 || !triangleAdjacency) {
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setHoverPreview(null);
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return;
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}
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const hovered = bucketFill(triIdx, triangleAdjacency, bucketThreshold);
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setHoverPreview(buildExclusionOverlayGeo(currentGeometry, hovered));
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}
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// ── Slider helper ─────────────────────────────────────────────────────────────
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function linkSlider(slider, valInput, onChangeFn, livePreview = true) {
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const isSpan = valInput.tagName === 'SPAN';
|
||
slider.addEventListener('input', () => {
|
||
const v = parseFloat(slider.value);
|
||
const display = onChangeFn(v);
|
||
if (isSpan) valInput.textContent = display; else valInput.value = display;
|
||
if (livePreview) {
|
||
clearTimeout(previewDebounce);
|
||
previewDebounce = setTimeout(updatePreview, 80);
|
||
}
|
||
});
|
||
if (!isSpan) {
|
||
valInput.addEventListener('change', () => {
|
||
const raw = parseFloat(valInput.value);
|
||
if (isNaN(raw)) { valInput.value = slider.value; return; }
|
||
const clamped = Math.max(parseFloat(slider.min), Math.min(parseFloat(slider.max), raw));
|
||
slider.value = clamped;
|
||
valInput.value = onChangeFn(clamped);
|
||
if (livePreview) {
|
||
clearTimeout(previewDebounce);
|
||
previewDebounce = setTimeout(updatePreview, 80);
|
||
}
|
||
});
|
||
}
|
||
}
|
||
|
||
function formatM(n) {
|
||
return n >= 1_000_000 ? `${(n / 1_000_000).toFixed(1)} M`
|
||
: n >= 1_000 ? `${(n / 1_000).toFixed(0)} k`
|
||
: String(n);
|
||
}
|
||
|
||
// ── STL loading ───────────────────────────────────────────────────────────────
|
||
|
||
async function handleSTL(file) {
|
||
try {
|
||
const { geometry, bounds } = await loadSTLFile(file);
|
||
currentGeometry = geometry;
|
||
currentBounds = bounds;
|
||
|
||
// Dispose old preview material and reset state for the new mesh
|
||
if (previewMaterial) {
|
||
previewMaterial.dispose();
|
||
previewMaterial = null;
|
||
}
|
||
|
||
// Auto-select Brick preset (index 5) on first load
|
||
const brickIdx = PRESETS.findIndex(p => p.name === 'Brick');
|
||
if (brickIdx >= 0 && !activeMapEntry) {
|
||
activeMapEntry = PRESETS[brickIdx];
|
||
activeMapName.textContent = PRESETS[brickIdx].name;
|
||
const swatches = document.querySelectorAll('.preset-swatch');
|
||
swatches.forEach((s, i) => s.classList.toggle('active', i === brickIdx));
|
||
}
|
||
mappingSelect.value = String(settings.mappingMode);
|
||
|
||
// Show mesh with a default material until a map is selected
|
||
loadGeometry(geometry);
|
||
dropHint.classList.add('hidden');
|
||
|
||
// Reset exclusion state for the new mesh
|
||
excludedFaces = new Set();
|
||
exclusionTool = null;
|
||
eraseMode = false;
|
||
isPainting = false;
|
||
exclBrushBtn.classList.remove('active');
|
||
exclBucketBtn.classList.remove('active');
|
||
exclEraseToggle.classList.remove('active');
|
||
exclBrushTypeRow.classList.add('hidden');
|
||
exclRadiusRow.classList.add('hidden');
|
||
exclThresholdRow.classList.add('hidden');
|
||
canvas.style.cursor = '';
|
||
setExclusionOverlay(null);
|
||
setHoverPreview(null);
|
||
_lastHoverTriIdx = -1;
|
||
exclCount.textContent = '0 faces excluded';
|
||
// Build adjacency data for brush/bucket tools (synchronous; fast enough for
|
||
// typical STL sizes processed by this tool)
|
||
const adjData = buildAdjacency(geometry);
|
||
triangleAdjacency = adjData.adjacency;
|
||
triangleCentroids = adjData.centroids;
|
||
|
||
// Reset scale & offset sliders so scale=1 = one tile covers the full bounding box
|
||
const resetVal = (slider, valEl, value) => {
|
||
slider.value = value;
|
||
valEl.value = value;
|
||
};
|
||
settings.scaleU = 1; scaleUSlider.value = scaleToPos(1); scaleUVal.value = 1;
|
||
settings.scaleV = 1; scaleVSlider.value = scaleToPos(1); scaleVVal.value = 1;
|
||
settings.offsetU = 0; resetVal(offsetUSlider, offsetUVal, 0);
|
||
settings.offsetV = 0; resetVal(offsetVSlider, offsetVVal, 0);
|
||
triLimitWarning.classList.add('hidden');
|
||
|
||
// Default edge length = 1/100 of the largest bounding box dimension
|
||
const maxDim = Math.max(bounds.size.x, bounds.size.y, bounds.size.z);
|
||
const defaultEdge = Math.max(0.1, Math.min(5.0, +(maxDim / 200).toFixed(2)));
|
||
settings.refineLength = defaultEdge;
|
||
refineLenSlider.value = defaultEdge;
|
||
refineLenVal.value = defaultEdge;
|
||
|
||
const triCount = getTriangleCount(geometry);
|
||
const mb = ((geometry.attributes.position.array.byteLength) / 1024 / 1024).toFixed(2);
|
||
meshInfo.textContent = `${triCount.toLocaleString()} triangles · ${mb} MB`;
|
||
|
||
exportBtn.disabled = (activeMapEntry === null);
|
||
updatePreview();
|
||
} catch (err) {
|
||
console.error('Failed to load STL:', err);
|
||
alert(`Could not load STL: ${err.message}`);
|
||
}
|
||
}
|
||
|
||
// ── Live preview ──────────────────────────────────────────────────────────────
|
||
|
||
function updatePreview() {
|
||
if (!currentGeometry || !currentBounds) return;
|
||
|
||
const fullSettings = { ...settings, bounds: currentBounds };
|
||
|
||
if (!activeMapEntry) {
|
||
// No map yet — plain material
|
||
if (previewMaterial) {
|
||
setMeshMaterial(null);
|
||
previewMaterial.dispose();
|
||
previewMaterial = null;
|
||
}
|
||
exportBtn.disabled = true;
|
||
return;
|
||
}
|
||
|
||
if (!previewMaterial) {
|
||
previewMaterial = createPreviewMaterial(activeMapEntry.texture, fullSettings);
|
||
loadGeometry(currentGeometry, previewMaterial);
|
||
} else {
|
||
updateMaterial(previewMaterial, activeMapEntry.texture, fullSettings);
|
||
}
|
||
|
||
exportBtn.disabled = false;
|
||
}
|
||
|
||
// ── Export pipeline ───────────────────────────────────────────────────────────
|
||
|
||
async function handleExport() {
|
||
if (!currentGeometry || !activeMapEntry || isExporting) return;
|
||
isExporting = true;
|
||
exportBtn.classList.add('busy');
|
||
exportProgress.classList.remove('hidden');
|
||
|
||
try {
|
||
setProgress(0.02, 'Subdividing mesh…');
|
||
|
||
// Build per-vertex exclusion weights if any faces are excluded.
|
||
// subdivision.js interpolates these through edge splits so the exclusion
|
||
// propagates correctly to all new vertices inside the excluded region.
|
||
const faceWeights = excludedFaces.size > 0
|
||
? buildFaceWeights(currentGeometry, excludedFaces)
|
||
: null;
|
||
|
||
const { geometry: subdivided, safetyCapHit } = await runAsync(() =>
|
||
subdivide(currentGeometry, settings.refineLength,
|
||
(p) => setProgress(0.02 + p * 0.35, 'Subdividing mesh…'),
|
||
faceWeights)
|
||
);
|
||
|
||
const subTriCount = subdivided.attributes.position.count / 3;
|
||
setProgress(0.38, `Applying displacement to ${subTriCount.toLocaleString()} triangles…`);
|
||
|
||
const displaced = await runAsync(() =>
|
||
applyDisplacement(
|
||
subdivided,
|
||
activeMapEntry.imageData,
|
||
activeMapEntry.width,
|
||
activeMapEntry.height,
|
||
settings,
|
||
currentBounds,
|
||
(p) => setProgress(0.38 + p * 0.32, `Displacing vertices…`)
|
||
)
|
||
);
|
||
|
||
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…`)
|
||
)
|
||
);
|
||
}
|
||
|
||
// Flat-bottom clamp: when bottom faces are masked (bottomAngleLimit > 0),
|
||
// any vertex that ended up below the original model's bottom layer gets
|
||
// snapped back up to that Z. Only the Z-value is changed.
|
||
if (settings.bottomAngleLimit > 0) {
|
||
const bottomZ = currentBounds.min.z;
|
||
const posArr = finalGeometry.attributes.position.array;
|
||
for (let i = 2; i < posArr.length; i += 3) {
|
||
if (posArr[i] < bottomZ) posArr[i] = bottomZ;
|
||
}
|
||
finalGeometry.attributes.position.needsUpdate = true;
|
||
finalGeometry.computeVertexNormals();
|
||
}
|
||
|
||
setProgress(0.97, 'Writing STL…');
|
||
await yieldFrame();
|
||
|
||
exportSTL(finalGeometry, 'textured.stl');
|
||
|
||
setProgress(1.0, 'Done!');
|
||
setTimeout(() => {
|
||
exportProgress.classList.add('hidden');
|
||
setProgress(0, '');
|
||
}, 1500);
|
||
} catch (err) {
|
||
console.error('Export failed:', err);
|
||
alert(`Export failed: ${err.message}`);
|
||
exportProgress.classList.add('hidden');
|
||
} finally {
|
||
isExporting = false;
|
||
exportBtn.classList.remove('busy');
|
||
}
|
||
}
|
||
|
||
function setProgress(fraction, label) {
|
||
exportProgBar.style.width = `${Math.round(fraction * 100)}%`;
|
||
exportProgLbl.textContent = label;
|
||
}
|
||
|
||
/** Yield to the browser event loop for one frame, then run fn. */
|
||
function runAsync(fn) {
|
||
return new Promise((resolve, reject) => {
|
||
requestAnimationFrame(() => {
|
||
try { resolve(fn()); }
|
||
catch (e) { reject(e); }
|
||
});
|
||
});
|
||
}
|
||
|
||
function yieldFrame() {
|
||
return new Promise(r => requestAnimationFrame(r));
|
||
}
|