Function computePrecisionEdgeLength

js/main.js:4028–4031

Compute the target max edge length from the brush diameter.

(brushDiameter)

    const iz = Math.max(0, Math.min(res - 1, Math.floor((sz - minZ) / dz)));

    let bestDist = Infinity, bestIdx = 0;
    // Two-pass: prefer original faces whose normal aligns with the subdivided
    // face (dot > 0.4 ≈ within ~66°), then among those pick the nearest
    // centroid.  This prevents boundary faces at sharp seams (cube edges etc.)
    // from being mapped to the adjacent face even when that face's centroid
    // happens to be closer.  Falls back to pure nearest-centroid if no
    // normal-matching candidate is found.