D3DXMatrixPerspectiveFovRH function
Builds a right-handed perspective projection matrix based on a field of view.
Syntax
D3DXMATRIX* D3DXMatrixPerspectiveFovRH( _Inout_ D3DXMATRIX *pOut, _In_ FLOAT fovy, _In_ FLOAT Aspect, _In_ FLOAT zn, _In_ FLOAT zf );
Parameters
- pOut [in, out]
-
Type: D3DXMATRIX*
Pointer to the D3DXMATRIX structure that is the result of the operation.
- fovy [in]
-
Type: FLOAT
Field of view in the y direction, in radians.
- Aspect [in]
-
Type: FLOAT
Aspect ratio, defined as view space width divided by height.
- zn [in]
-
Type: FLOAT
Z-value of the near view-plane.
- zf [in]
-
Type: FLOAT
Z-value of the far view-plane.
Return value
Type: D3DXMATRIX*
Pointer to a D3DXMATRIX structure that is a right-handed perspective projection matrix.
Remarks
The return value for this function is the same value returned in the pOut parameter. In this way, the D3DXMatrixPerspectiveFovRH function can be used as a parameter for another function.
This function computes the returned matrix as shown.
xScale 0 0 0
0 yScale 0 0
0 0 zf/(zn-zf) -1
0 0 zn*zf/(zn-zf) 0
where:
yScale = cot(fovY/2)
xScale = yScale / aspect ratio
Requirements
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See also
- D3DXMatrixPerspectiveRH
- D3DXMatrixPerspectiveLH
- D3DXMatrixPerspectiveFovLH
- D3DXMatrixPerspectiveOffCenterRH
- D3DXMatrixPerspectiveOffCenterLH
Build date: 11/22/2012
