MarSTDv2004: CMatrix4 Class Reference

MarSTDv2004

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CMatrix4 Class Reference

List of all members.

Detailed Description

NOTE: 3D vectors are padded with 1.0. So eg the 3D vector (1.0, 2.0, 3.0) becomes the 4D vector (1.0, 2.0, 3.0, 1.0). This makes multiplication by a 4x4 matrix possible and adds the translation part.

Definition at line 24 of file CMatrix4.h.

Public Member Functions

void makeIdentity ()
void transpose ()
 Swaps (X, Y) position of the values. Usefull when converting from OpenGL <-> Direct3D eg.
void makeXRotation (float r)
 Create a rotation around the X-axis.
void makeYRotation (float r)
 Create a rotation around the Y-axis.
void makeZRotation (float r)
 Create a rotation around the Z-axis.
void makeRotation (float x, float y, float z)
 Create a rotation around all three axis. Rotates around X, Y and Z axis in that order.
void makeScaling (float x, float y, float z)
 Create a scaling matrix.
void makeTranslation (float x, float y, float z)
 Create a translation matrix.
void mul (float x, float y, float z, float w, float *xout, float *yout, float *zout, float *wout)
 Multiply the 4D vector with the matrix and store the result in xout, yout, zout and wout.
void mul4x3 (float x, float y, float z, float *xout, float *yout, float *zout)
 Multiply the 3D vector with the matrix, padding the vector with 1.0.
void mul3x3 (float x, float y, float z, float *xout, float *yout, float *zout)
 Multiply the 3D vector with the matrix, without padding the vector with 1.0.
void mul (CVector &vector, CVector &out)
 Multiply the 4D vector with the matrix and store the result in xout, yout, zout and wout.
void mul4x3 (CVector &vector, CVector &out)
 Multiply the 3D vector with the matrix, padding the vector with 1.0.
void mul3x3 (CVector &vector, CVector &out)
 Multiply the 3D vector with the matrix, without padding the vector with 1.0.
void mul (CMatrix4 &matrix)
 Multiply the matrix with matrix and store the result in this matrix.
void mul3x3 (CMatrix3 &matrix)
 Multiply the 3x3 part of the matrix with matrix and store the result in this matrix.
void mul4x3 (CMatrix3 &matrix)
void mul (CMatrix4 &matrix, CMatrix4 &out)
 Multiply the matrix with matrix and store the result in out. This method assumes matrix != out && this != out.
void mul3x3 (CMatrix3 &matrix, CMatrix4 &out)
 Multiply the 3x3 part of the matrix with matrix and store the result in out. This method assumes matrix != out && this != out.
void mul4x3 (CMatrix3 &matrix, CMatrix4 &out)
 Multiply the 3x3 part of the matrix with matrix as if it were a 4x3 matrix and store the result in out. This method assumes matrix != out && this != out. mul3x3.
float determinant ()
void invert ()
float operator() (int x, int y)
 Retrieve a value of the matrix by using the function operator.
CVector operator * (CVector vector)
 Multiply the 3D vector with the matrix and return the result.
CMatrix4 operator * (CMatrix4 &matrix)
 Mutiply the matrix with matrix and return a reference to this matrix.
CMatrix4 operator * (CMatrix3 &matrix)
 Mutiply the matrix with matrix and return a reference to this matrix.
CMatrix4 & operator *= (CMatrix4 &matrix)
 Mutiply the matrix with matrix and return a reference to this matrix.
CMatrix4 & operator *= (CMatrix3 &matrix)
 Mutiply the matrix with matrix and return a reference to this matrix.

Public Attributes

float v [16]

Member Function Documentation

void CMatrix4::mul4x3 (  CMatrix3 &  matrix  ) 
 

Multiply the 3x3 part of the matrix with matrix as if it were a 4x3 matrix and store the result in this matrix. Now some more details on how this works... 

The 3x3 matrix matrix,

( X1Y1  X2Y1  X3Y1 )

( X1Y2  X2Y2  X3Y2 )

( X1Y3  X2Y3  X3Y3 )

is expanded to the 4x4 matrix:

( X1Y1  X2Y1  X3Y1  0.0 )

( X1Y2  X2Y2  X3Y2  0.0 )

( X1Y3  X2Y3  X3Y3  0.0 )

( 0.0   0.0   0.0   1.0 )
Thus when using 3x3 matrices to represent rotations and 4x4 matrices to represent transformation, eg rotations + translation, this operations has the same effect as multipling the matrix by a 4x4 matrix with the translation zeroed out.

The documentation for this class was generated from the following file:
Generated on Tue Feb 8 21:59:41 2005 for MarSTDv2004 by  doxygen 1.4.1

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