Function FlipFace

editor/HRoom.cpp:2210–2238

Flips a face

// Flips a face
void FlipFace(room *rp, int facenum) {
  face *fp = &rp->faces[facenum];

  ASSERT(fp->portal_num == -1);

  for (int i = 0; i < fp->num_verts / 2; i++) {
    int v = fp->face_verts[i];
    fp->face_verts[i] = fp->face_verts[fp->num_verts - 1 - i];
    fp->face_verts[fp->num_verts - 1 - i] = v;

    roomUVL uvl = fp->face_uvls[i];
    fp->face_uvls[i] = fp->face_uvls[fp->num_verts - 1 - i];
    fp->face_uvls[fp->num_verts - 1 - i] = uvl;
  }

  // Get new normal
  if (!ComputeFaceNormal(rp, facenum))
    Int3(); // Bad!  Get Matt!

#ifndef NEWEDITOR
  World_changed = 1;
  EditorStatus("Room %d face %d flipped.", ROOMNUM(rp), facenum);
#else
  if (ROOMNUM(rp) < MAX_ROOMS)
    EditorStatus("Room %d face %d flipped.", ROOMNUM(rp), facenum);
  else
    EditorStatus("Face %d flipped.", facenum);
#endif
}

// Attempt to fix the cracks in a level
void FixCracks() {