D3DXMAMATRIXAFFINETRANSFORMATION function
Create an affine transformation transformation matrix. NULL parameters will be treated as a unit matrix.
definition
D3DXMAMATRIX * WINAPI D3DXMATRIXAFFINETRANSFORMATION
D3DXMAMATRIX * POUT,
Float Scaling,
Const d3dxvector3 * Protationcenter,
Const d3dxquaternion * Protation,
Const d3dxvector3 * ptranslation
);
parameter
pout
[IN, OUT] points to the matrix of the result of the D3DXMatrix structure.
Scaling
Scaling Coefficient.
Protationcenter
[in] points to the D3DXVECTOR3 structure pointer, rotating the center vector. If set to NULL, use a unit matrix instead of the MRC.
Protation
[in] points to the D3DxQuaternion structure rotation matrix. If the parameter is NULL, use the unit matrix MR instead.
PTranslation
[in] points to the D3DXVector3 structure transform vector. If null, use the unit matrix MT.
return value:
Point the affine transformation matrix of the D3DXMatrix structure.
Description:
This function is to calculate a affine transformation matrix with the following formula:
Mout = ms * (mrc) -1 * mr * mrc * mt
among them:
Mout = Output Matrix (Pout)
MS = Zoom Matrix (Scaling)
MRC = Rotating Matrix Center (ProtationCenter)
MR = Rotation Matrix (Protation)
MT = Ping Matrix (PTRANSLATION)
The return value is the same as Pout, so that D3DXMatrixAffineTransformation is used as other function parameters. 2D affine transformation matrix with D3DXMatrixaffineTransformation2D.
Function information:
HEADER
D3DX9Math.h
Import Library
D3DX9.LIB
Minimum operation systems
WINDOWS 98
related functions:
D3DXMAMATRIXTRANSFORMATION, MATRICES
