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Microsoft DirectX 9.0 |

Creates an identity matrix.

Syntax

D3DXMATRIX *D3DXMatrixIdentity(

D3DXMATRIX *pOut);

Parameters

pOut- [in, out] Pointer to the D3DXMATRIX structure that is the result of the operation.

Return Value

Pointer to a

D3DXMATRIXstructure that is the identity matrix.

Remarks

The identity matrix is a matrix in which all coefficients are 0 except the [1,1][2,2][3,3][4,4] coefficients, which are set to 1. The identity matrix is special in that when it is applied to vertices, they are unchanged. The identity matrix is used as the starting point for matrices that will modify vertex values to create rotations, translations, and any other transformations that can be represented by a 4 ? matrix.

The return value for this function is the same value returned in the

pOutparameter. In this way, theD3DXMatrixIdentityfunction can be used as a parameter for another function.

Function Information

Header d3dx9math.h Import library d3dx9.lib Minimum operating systems Windows 98

See Also

D3DXMatrixIsIdentity