code: public long addObstacle(float[] pos, float radius, float height) {
  		TileCacheObstacle ob = allocObstacle();
  		ob.type = TileCacheObstacleType.CYLINDER;
  
  		vCopy(ob.pos, pos);
  		ob.radius = radius;
  		ob.height = height;
  
  		return addObstacleRequest(ob).ref;
  	}
docs: Cylinder obstacle