D3DDDIARG_DRAWPRIMITIVE structure (d3dumddi.h)

The D3DDDIARG_DRAWPRIMITIVE structure describes a nonindexed primitive to draw.

Syntax

typedef struct _D3DDDIARG_DRAWPRIMITIVE {
  [in] D3DPRIMITIVETYPE PrimitiveType;
  [in] UINT             VStart;
  [in] UINT             PrimitiveCount;
} D3DDDIARG_DRAWPRIMITIVE;

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] VStart

The index (into each active vertex stream) of the vertex elements to start drawing with. Vertex data should be read from the current vertex streams (those that are referenced by the current vertex shader).

[in] PrimitiveCount

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

Remarks

The Microsoft Direct3D runtime does not transform the vertex data before passing a pointer to the description of the vertex data in the pData parameter in a call to the user-mode display driver's DrawPrimitive function.

When the runtime specifies triangle-edge flags in the value that is pointed to by the pFlagBuffer parameter in the DrawPrimitive call, the runtime also specifies to draw one or more triangles (that is, the runtime specifies the D3DPT_TRIANGLEFAN value in the PrimitiveType member and from 0x00000001 to 0xFFFFFFFF in the PrimitiveCount member of D3DDDIARG_DRAWPRIMITIVE that is pointed to by the pData parameter in the DrawPrimitive call).

Requirements

See also

DrawPrimitive