Function computeTriEdges

js/smartResolution.js:221–235

* Pre-compute the three edge lengths of every triangle in `geometry`. * Returned Float64Array has 3 entries per triangle (no winding semantics).

(geometry)

  return total;
}

/**
 * Predict the triangle count `subdivide(geometry, edge)` will produce, by
 * simulating the per-triangle split pattern.  Useful as a pre-flight check on
 * the user's chosen refineLength.
 *
 * @param {THREE.BufferGeometry} geometry
 * @param {number} edge  Target maximum edge length, same units as positions.
 * @returns {number} Predicted post-subdivision triangle count.
 */
export function estimateSubdivisionTriCount(geometry, edge) {
  if (!geometry || !geometry.attributes || !geometry.attributes.position) return 0;
  return simulateFromEdges(computeTriEdges(geometry), edge);
}

/**
 * @param {object} args
 * @param {THREE.BufferGeometry} args.geometry      Current working geometry.