typedef struct _D3DSPAN {
WORD wCount;
WORD wFirst;
} D3DSPAN, *LPD3DSPAN;
Defines a span for the D3DOP_SPAN opcode in the D3DOPCODE enumerated type. Spans join a list of points with the same y value. If the y value changes, a new span is started.
Number of spans.
Index to first vertex.