Function ObjUnlink

Descent3/object.cpp:1480–1523

}

void ObjUnlink(int objnum) {
  object *obj = &Objects[objnum];

  ASSERT(objnum != -1);

  // If object is already unlinked, do nothing
  if (obj->roomnum == -1) {
    return;
  }

  if (obj->flags & OF_BIG_OBJECT) {
    BigObjRemove(objnum);
  }

  if (OBJECT_OUTSIDE(obj)) {
    int cellnum = CELLNUM(obj->roomnum);

    terrain_segment *seg = &Terrain_seg[cellnum];

    if (obj->prev == -1)
      seg->objects = obj->next;
    else
      Objects[obj->prev].next = obj->next;

    if (obj->next != -1)
      Objects[obj->next].prev = obj->prev;
  } else {
    room *rp = &Rooms[obj->roomnum];

    if (obj->prev == -1)
      rp->objects = obj->next;
    else
      Objects[obj->prev].next = obj->next;

    if (obj->next != -1)
      Objects[obj->next].prev = obj->prev;
  }

  // Mark as not linked
  obj->roomnum = -1;

  ASSERT(Objects[0].next != 0);
  ASSERT(Objects[0].prev != 0);
}

//-----------------------------------------------------------------------------
//	Scan the object list, freeing down to num_used objects