D3DXMAMATRIXTRANSFORMATION function
Create a transformation matrix. If the parameter is set to NULL, it is treated as a unit matrix.
definition:
D3DXMAMATRIX * WINAPI D3DXMAMATRIXTRANSFORMATION
D3DXMAMATRIX * POUT,
Const d3dxvector3 * pscalingcenter,
Const d3dxquaternion * pscalingrotation,
Const d3dxvector3 * pscaling,
Const d3dxvector3 * Protationcenter,
Const d3dxquaternion * Protation,
Const d3dxvector3 * ptranslation
);
parameter:
pout
[IN, OUT] points to the operation result matrix of the D3DXMatrix structure.
PSCalingCenter
[in] Point to the zoom center point vector of the D3DXVECTOR3 structure. If null, the MSC matrix is the unit matrix.
Pscalingrotation
[in] Points to the scaling and rotation of the D3DxQuaternion structure. If the parameter is NULL, the MSR matrix is the unit matrix.
pscaling
[in] points to the zoom vector of the D3DXVECTOR3 structure. If the parameter is NULL, the MS matrix is the unit matrix.
Protationcenter
[in] points to the center of rotation of the D3DxVector3 structure. If the parameter is NULL, the MRC matrix is a unit matrix.
Protation
[in] Points the four-way group of rotation of the D3Dxquaternion structure. If the parameter is NULL, the MR matrix is the unit matrix.
PTranslation
[in] Points to the D3DxVector3 structure. If the parameter is NULL, the MT matrix is the unit matrix.
return value:
Point the transformation matrix of the D3DXMatrix structure. Matrix.
Description:
This function calculates the transform matrix with the following formula:
Mout = (msc) -1 * (msr) -1 * ms * msr * msc * (mrc) -1 * mr * mrc * MT
among them:
Mout = Output Matrix (Pout)
MSC = Zoom Center Matrix (PSCalingCenter)
MSR = Zoom Rotation Matrix (PSCALINGROTION)
MS = Zoom Matrix (pscaling)
MRC = rotary center matrix (ProtationCenter)
MR = Rotation Matrix (Protation)
MT = Ping Matrix (PTRANSLATION)
The function return value is the same as the POUT parameter. This allows the function D3DXMAMATRIXTRANSFORMATION to use parameters of other functions.
If it is a 2D transformation matrix, you must use a function D3DXMAMATRIXTRANSFORMATION2D.
Function information:
HEADER
D3DX9Math.h
Import Library
D3DX9.LIB
Minimum operation systems
WINDOWS 98
related functions:
D3DXMatrixaffineTransformation, Matrices
