by using multiple arrays of indexes in CPU or GPU memory.
|• ||The buffer slot contains either a buffer object to read indexes from, or f to read from CPU memory.|
|• ||The ptrs slot contains either a void*-array of pointers to the starts of index data, or a pointer-sized ulong-array of offsets into buffer.|
|• ||The counts slot contains a uint-array containing the number of indexes to read from each pointer or offset in ptrs.|
|• ||The index-type slot contains an index-type value specifying whether the arrays consist of ubyte-indexes, ushort-indexes, or uint-indexes.|