D3DMXMatrixPerspectiveOffCenterLH (Windows Embedded CE 6.0)

1/6/2010

Builds a customized, left-handed perspective projection matrix in floating point format.

Syntax

D3DMXMATRIX* WINAPI D3DMXMatrixPerspectiveOffCenterLH(
  D3DMXMATRIX* pOut,
    FLOAT        l,
  FLOAT        r,
  FLOAT        b,
  FLOAT        t,
  FLOAT        zn,
  FLOAT        zf
);

Parameters

• pOut
  [in, out] Pointer to the D3DMXMATRIX structure that is the result of the operation.

• l
  [in] Minimum x-value of the view volume.

• r
  [in] Maximum x-value of the view volume.

• b
  [in] Minimum y-value of the view volume.

• t
  [in] Maximum y-value of the view volume.

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

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

Return Value

Pointer to a D3DMXMATRIX structure that is a customized, left-handed perspective projection matrix.

Remarks

All the parameters of the D3DMXMatrixPerspectiveOffCenterLH 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 D3DMXMatrixPerspectiveOffCenterLH function can be used as a parameter for another function.

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

2*zn/(r-l)   0            0              0
0            2*zn/(t-b)   0              0
(l+r)/(l-r)  (t+b)/(b-t)  zf/(zf-zn)     1
0            0            zn*zf/(zn-zf)  0

Requirements

See Also

Reference

D3DMX Functions
D3DMXMATRIX
D3DMXMatrixPerspectiveOffCenterLHFxd