D3DDDIARG_DRAWINDEXEDPRIMITIVE2 structure (d3dumddi.h)

The D3DDDIARG_DRAWINDEXEDPRIMITIVE2 structure describes an indexed primitive to draw.

Syntax

typedef struct _D3DDDIARG_DRAWINDEXEDPRIMITIVE2 {
  [in] D3DPRIMITIVETYPE PrimitiveType;
  [in] INT              BaseVertexOffset;
  [in] UINT             MinIndex;
  [in] UINT             NumVertices;
  [in] UINT             StartIndexOffset;
  [in] UINT             PrimitiveCount;
} D3DDDIARG_DRAWINDEXEDPRIMITIVE2;

Members

[in] PrimitiveType

A D3DPRIMITIVETYPE-typed value that indicates the type of primitive to draw. This member can be one of the following values: D3DPT_POINTLIST, D3DPT_LINELIST, D3DPT_LINESTRIP, D3DPT_TRIANGLELIST, D3DPT_TRIANGLESTRIP, or D3DPT_TRIANGLEFAN. For more information about D3DPRIMITIVETYPE, see the Microsoft Windows SDK documentation.

[in] BaseVertexOffset

The offset that should be added to each vertex in vertex stream 0 by the various primitives to determine the actual vertex in vertex stream 0. This offset could be negative, but when an index is added to the offset, the result is positive.

[in] MinIndex

The minimum index of a range of vertices that are potentially accessed by the primitives to be drawn and, therefore, which vertices should be processed.

[in] NumVertices

The number of vertices in a range that are potentially accessed by the primitives to be drawn and, therefore, which vertices should be processed.

[in] StartIndexOffset

The offset of the first index in the index buffer from which indices are read to draw the primitives.

[in] PrimitiveCount

The number of triangles, lines, or points to draw for the given primitive.

Remarks

The Microsoft Direct3D runtime transforms the index data before passing a pointer to the description of the index data in the pData parameter in a call to the user-mode display driver's DrawIndexedPrimitive2 function.

When the runtime specifies triangle-edge flags in the value that is pointed to by the pFlagBuffer parameter in the DrawIndexedPrimitive2 call, the runtime also specifies to draw only one triangle (that is, the runtime specifies the D3DPT_TRIANGLELIST value in the PrimitiveType member and 0x00000001 in the PrimitiveCount member of D3DDDIARG_DRAWINDEXEDPRIMITIVE2 that is pointed to by the pData parameter in the DrawIndexedPrimitive2 call).

Requirements

See also

DrawIndexedPrimitive2