assert(shapes!=0);
	Shape_frame *get_shape(int shapenum, int framenum = 0)		{		Shape_frame *r=(shapes[shapenum].get(*shape_source, shapenum, framenum));		if(!r)			{#if DEBUG				cerr << "get_shape(" <<					shapenum << "," <<					framenum << ") -> NULL" << endl;#endif			}		return r;		}