D3DVERTEXELEMENT9

Defines the vertex data layout. Each vertex can contain one or more data types, and each data type is described by a vertex element.

typedef struct D3DVERTEXELEMENT9 {
    WORD Stream;
    WORD Offset;
    BYTE Type;
    BYTE Method;
    BYTE Usage;
    BYTE UsageIndex;
} D3DVERTEXELEMENT9, *LPD3DVERTEXELEMENT9;

Members

Stream: Stream number.
Offset: Offset from the beginning of the vertex data to the data associated with the particular data type.
Type: The data type, specified as a D3DDECLTYPE. One of several predefined types that define the data size. Some methods have an implied type.
Method: The method specifies the tessellator processing, which determines how the tessellator interprets (or operates on) the vertex data. For more information, see D3DDECLMETHOD.
Usage: Defines what the data will be used for; that is, the interoperability between vertex data layouts and vertex shaders. Each usage acts to bind a vertex declaration to a vertex shader. In some cases, they have a special interpretation. For example, an element that specifies D3DDECLUSAGE_NORMAL or D3DDECLUSAGE_POSITION is used by the N-patch tessellator to set up tessellation. See D3DDECLUSAGE for a list of the available semantics. D3DDECLUSAGE_TEXCOORD can be used for user-defined fields (which don't have an existing usage defined).
UsageIndex: Modifies the usage data to allow the user to specify multiple usage types.

Remarks

Vertex data is defined using an array of D3DVERTEXELEMENT9 structures. Use D3DDECL_END to declare the last element in the declaration.

D3DVERTEXELEMENT9

Members

Remarks

See Also