Function PropagateToConnectedFacesSub

editor/HRoom.cpp:3204–3234

returns the number of faces changed

// returns the number of faces changed
int PropagateToConnectedFacesSub(room *rp, int facenum, bool *face_checked) {
  int n_changed = 0;

  face_checked[facenum] = 1;

  face *fp = &rp->faces[facenum];

  for (int e = 0; e < fp->num_verts; e++) {
    int t = -1;

    do {

      t = FindConnectedFace(rp, facenum, e, t + 1);

      if ((t != -1) && !face_checked[t]) {

        if (NormalsAreSame(&fp->normal, &rp->faces[t].normal)) {

          HTexturePropagateToFace(rp, t, rp, facenum);

          n_changed++;

          n_changed += PropagateToConnectedFacesSub(rp, t, face_checked);
        }
      }

    } while (t != -1);
  }

  return n_changed;
}

void PropagateToConnectedFaces(room *rp, int facenum) {
  bool face_checked[MAX_FACES_PER_ROOM];