Function applySmartResolution

js/main.js:3229–3270

* Smart resolution: pick a refineLength based on the active texture's detail * and the model's surface area, capped to fit the triangle budget. Run on * demand (button) so the result reflects the most up-to-date texture, mapping, * and geometry — i.e. the state the export pipeline will actually

()

    exclThresholdRow.classList.add('hidden');
    canvas.style.cursor = '';
    setExclusionOverlay(null);
    setHoverPreview(null);
    _lastHoverTriIdx = -1;
    exclCount.textContent = t('excl.initExcluded');
    // Build adjacency data for brush/bucket tools (synchronous; fast enough for
    // typical STL sizes processed by this tool)
    const adjData = buildAdjacency(currentGeometry);
    triangleAdjacency = adjData.adjacency;
    triangleCentroids = adjData.centroids;
    triangleFaceNormals = adjData.faceNormals;
    updateMeshDiagnostics(adjData, currentGeometry.attributes.position.count / 3);

    // Carry scale, offset, rotation, and all other tuning across model swaps —
    // they're normalized to the bounding box so they apply meaningfully to the
    // new mesh. Output resolution is the one exception: it's recomputed below
    // from the new model's diagonal so a default-sized edge length still makes
    // sense whether the user just loaded a thumb-sized part or a 1m piece.
    triLimitWarning.classList.add('hidden');

    // Default edge length = 1/250 of the bounding box diagonal
    const diag = Math.sqrt(bounds.size.x ** 2 + bounds.size.y ** 2 + bounds.size.z ** 2);
    const defaultEdge = Math.max(0.05, Math.min(5.0, +(diag / 250).toFixed(2)));
    settings.refineLength = defaultEdge;
    refineLenSlider.value = defaultEdge;
    refineLenVal.value = defaultEdge;
    checkResolutionWarning();

    const triCount = getTriangleCount(currentGeometry);
    const mb = ((currentGeometry.attributes.position.array.byteLength) / 1024 / 1024).toFixed(2);
    const sx = bounds.size.x.toFixed(2);
    const sy = bounds.size.y.toFixed(2);
    const sz = bounds.size.z.toFixed(2);
    _setMeshInfo(triCount, mb, sx, sy, sz);

    exportBtn.disabled = (activeMapEntry === null);
    export3mfBtn.disabled = (activeMapEntry === null);
    updateSmartResBtnState();
    updatePreview();
  } catch (err) {
    // A superseded STEP import (user dropped another file mid-tessellation)
    // is not a failure — the newer load owns the UI now.
    if (!err || !err.stepCancelled) {
      console.error('Failed to load model:', err);
      alert(t('alerts.loadFailed', { msg: err.message }));
    }