Function linkSlot

js/regularize.js:165–171

(s)

  // vertex → incident triangles, as intrusive doubly-linked lists of corner
  // slots over typed arrays (replaces one JS Set per vertex — far lighter on
  // multi-million-vertex meshes and allocation-free per collapse).
  // Slot s = corner index (t*3+k); the vertex owning slot s is corners[s].
  // Deleted wings and moved corners are unlinked, so each vertex's list
  // contains exactly its alive incident corners.
  const vfHead   = new Int32Array(nextVid).fill(-1);
  const slotNext = new Int32Array(triCount * 3);
  const slotPrev = new Int32Array(triCount * 3);
  function linkSlot(s) {
    const v = corners[s];
    const h = vfHead[v];