D3DXMAMATRIXTRANSFORMATION2D function
Creating a 2D transformation matrix is the transform matrix in the XY plane. If the parameter is NULL as a unit matrix.
definition:
D3DXMAMATRIX * WINAPI D3DXMAMATRIXTRANSFORMATION2D (
D3DXMAMATRIX * POUT,
Const d3dxvector2 * pscalingcenter,
Float * pscalingrotation,
Const d3dxvector2 * pscaling,
Const d3dxvector2 * Protationcenter,
Float Rotation,
Const d3dxvector2 * ptranslation
);
parameter:
pout
[IN, OUT] points to the conversion matrix of the D3Dxmatrix structure.
PSCalingCenter
[in] Points the zoom center vector of the D3DxVector2 structure. If the parameter is NULL, the MSC matrix is a unit matrix.
Pscalingrotation
[in] Point to zoom rotation factor.
pscaling
[in] Point the zoom vector of the D3DxVector2 structure. If the parameter is NULL, the MS matrix is a unit matrix.
Protationcenter
[in] points to the rotation vector of the D3DXVector2 structure. If the parameter is NULL, the MRC matrix is a unit matrix.
Rotation
Rotating angle.
PTranslation
[in] Points to the D3DxVector2 structure. If the parameter is NULL, the MT matrix is a unit matrix.
return value:
Point the transformation matrix of the D3DXMatrix structure.
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 = center of rotation matrix (Protationcenter)
MR = Rotation Matrix (Rotation)
MT = Ping Matrix (PTRANSLATION)
The function return value is the same as the POUT parameter. This allows the function D3DXMAMATRIXTRANSFORMATION2D as a parameter of other functions. If you create a 3D transform matrix to use a function D3DXMAMATRIXTRANSFORMATION.
Function information:
HEADER
D3DX9Math.h
Import Library
D3DX9.LIB
Minimum operation systems
WINDOWS 98
related functions:
D3DXMAMATRIXAFFINETRANSFORMATION2D, MATRICES
