D3DXMatrixPerspectiveOffCenterLH function (D3dx9math.h)
Note
The D3DX utility library is deprecated. We recommend that you use DirectXMath instead.
Builds a customized, left-handed perspective projection matrix.
Syntax
D3DXMATRIX* D3DXMatrixPerspectiveOffCenterLH(
_Inout_ D3DXMATRIX *pOut,
_In_ FLOAT l,
_In_ FLOAT r,
_In_ FLOAT b,
_In_ FLOAT t,
_In_ FLOAT zn,
_In_ FLOAT zf
);
Parameters
-
pOut [in, out]
-
Type: D3DXMATRIX*
Pointer to the D3DXMATRIX structure that is the result of the operation.
-
l [in]
-
Type: FLOAT
Minimum x-value of the view volume.
-
r [in]
-
Type: FLOAT
Maximum x-value of the view volume.
-
b [in]
-
Type: FLOAT
Minimum y-value of the view volume.
-
t [in]
-
Type: FLOAT
Maximum y-value of the view volume.
-
zn [in]
-
Type: FLOAT
Minimum z-value of the view volume.
-
zf [in]
-
Type: FLOAT
Maximum z-value of the view volume.
Return value
Type: D3DXMATRIX*
Pointer to a D3DXMATRIX structure that is a customized, left-handed perspective projection matrix.
Remarks
All the parameters of the D3DXMatrixPerspectiveOffCenterLH 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 D3DXMatrixPerspectiveOffCenterLH 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
| Requirement | Value |
|---|---|
| Header |
|
| Library |
|
See also