D3DXMatrixOrthoLH

Builds a left-handed orthogonal projection matrix.

D3DXMATRIX* D3DXMatrixOrthoLH(
  D3DXMATRIX* pOut,
  FLOAT w,
  FLOAT h,
  FLOAT zn,
  FLOAT zf
); 

Parameters

pOut

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

w

[in] Width of the view volume.

h

[in] Height of the view volume.

zn

[in] Minimum z-value of the view volume.

zf

[in] Maximum z-value of the view volume.

Return Values

Pointer to a D3DXMATRIX structure that is a left-handed orthogonal projection matrix.

Remarks

An orthogonal matrix is an invertible matrix for which the inverse of the matrix is equal to the transpose of the matrix.

All the parameters of the D3DXMatrixOrthoLH function are distances in camera space. The parameters describe the dimensions of the view volume.

The return value for this function is the same value returned in the pOut parameter. In this way, the D3DXMatrixOrthoLH function can be used as a parameter for another function.

This function uses the following formula to compute the returned matrix.

2/w  0    0           0
0    2/h  0           0
0    0    1/(zf-zf)   0
0    0    zn/(zn-zf)  1

Requirements

  Header: Declared in D3dx8math.h.
  Import Library: Use D3dx8.lib.

See Also

D3DXMatrixOrthoRH, D3DXMatrixOrthoOffCenterRH, D3DXMatrixOrthoOffCenterLH