hep.physics
Class BasicHep3Matrix

java.lang.Object
  |
  +--hep.physics.BasicHep3Matrix

All Implemented Interfaces:

Hep3Matrix

public class BasicHep3Matrix

extends java.lang.Object

implements Hep3Matrix

3x3 matrices for Hep3Vector operations. Internally the 3x3 matrix elements are indexed by 0,1, and 2 but externally they are referenced by 1,2, and 3. This is to allow the 4x4 Lorentz matrices to be consistently referenced with the same meaning for the indicies.

Constructor Summary

BasicHep3Matrix()

BasicHep3Matrix(double e11, double e12, double e13, double e21, double e22, double e23, double e31, double e32, double e33)

Method Summary

double	det() Returns the determinent of the matrix.
double	e(int row, int column) Returns the (row, column) element where the indicies expected are 1,2 and 3.
void	setActiveEuler(double phi, double theta, double psi) Defines a rotation matrix via Euler angles.
void	setElement(int row, int column, int value) Sets the (row, column) element of the matrix where the indices run over 1,2, and 3.
void	setPassiveEuler(double phi, double theta, double psi) Defines a rotation matrix via Euler angles.
double	trace() Returns the trace of the matrix.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BasicHep3Matrix

public BasicHep3Matrix()

BasicHep3Matrix

public BasicHep3Matrix(double e11,
                       double e12,
                       double e13,
                       double e21,
                       double e22,
                       double e23,
                       double e31,
                       double e32,
                       double e33)

Method Detail

e

public double e(int row,
                int column)

Returns the (row, column) element where the indicies expected are 1,2 and 3.

Specified by:

e in interface Hep3Matrix

det

public double det()

Returns the determinent of the matrix.

Specified by:

det in interface Hep3Matrix

trace

public double trace()

Returns the trace of the matrix.

Specified by:

trace in interface Hep3Matrix

setElement

public void setElement(int row,
                       int column,
                       int value)

Sets the (row, column) element of the matrix where the indices run over 1,2, and 3.

setPassiveEuler

public void setPassiveEuler(double phi,
                            double theta,
                            double psi)

Defines a rotation matrix via Euler angles. A "passive" rotation matrix rotates the coordinate system, an "active" one rotates the vector(body). The angles are defined for a right handed coordinate system. They are defined by counterclockwise rotations about an axis by the right hand rule, ie, looking down the axis in the negative direction the transvers axes are seen to rotate counterclockwise. To define passive(active) angles first rotate the coordinates(body) about the z-axis by phi, then about the new x-axis by theta then about the new z-axis by psi. Angles in radians.

setActiveEuler

public void setActiveEuler(double phi,
                           double theta,
                           double psi)

Defines a rotation matrix via Euler angles. A "passive" rotation matrix rotates the coordinate system, an "active" one rotates the vector(body). The angles are defined for a right handed coordinate system. They are defined by counterclockwise rotations about an axis by the right hand rule, ie, looking down the axis in the negative direction the transvers axes are seen to rotate counterclockwise. To define passive(active) angles first rotate the coordinates(body) about the z-axis by phi, then about the new x-axis by theta then about the new z-axis by psi. Angles in radians.