IT. Expert System.

public class Matrix3f
extends Object

• Constructor Summary

  Constructors

  Constructor and Description
  Matrix3f() Creates a new identity 3x3 matrix
  Matrix3f(float[] dataArray) Creates a new matrix and sets its values from the given parameter

• Method Summary

  Methods

  Modifier and Type	Method and Description
  float	get(int x, int y) Returns the value for a given row and column
  float[]	getArray() Return a reference to the internal array representing matrix values.
  void	load(Matrix3f src) Sets the values of the matrix to those of the parameter
  void	loadIdentity() Sets the matrix values to identity
  void	loadMultiply(Matrix3f lhs, Matrix3f rhs) Sets current values to be the result of multiplying two given matrices
  void	loadRotate(float rot) Makes the upper 2x2 a rotation matrix of the given angle
  void	loadRotate(float rot, float x, float y, float z) Sets current values to be a rotation matrix of certain angle about a given axis
  void	loadScale(float x, float y) Makes the upper 2x2 a scale matrix of given dimensions
  void	loadScale(float x, float y, float z) Sets current values to be a scale matrix of given dimensions
  void	loadTranslate(float x, float y) Sets current values to be a translation matrix of given dimensions
  void	multiply(Matrix3f rhs) Post-multiplies the current matrix by a given parameter
  void	rotate(float rot) Modifies the upper 2x2 of the current matrix by post-multiplying it with a rotation matrix of given angle
  void	rotate(float rot, float x, float y, float z) Modifies the current matrix by post-multiplying it with a rotation matrix of certain angle about a given axis
  void	scale(float x, float y) Modifies the upper 2x2 of the current matrix by post-multiplying it with a scale matrix of given dimensions
  void	scale(float x, float y, float z) Modifies the current matrix by post-multiplying it with a scale matrix of given dimensions
  void	set(int x, int y, float v) Sets the value for a given row and column
  void	translate(float x, float y) Modifies the current matrix by post-multiplying it with a translation matrix of given dimensions
  void	transpose() Sets the current matrix to its transpose

  • Methods inherited from class java.lang.Object

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

• Constructor Detail

  • Matrix3f

    public Matrix3f()

    Creates a new identity 3x3 matrix

  • Matrix3f

    public Matrix3f(float[] dataArray)

    Creates a new matrix and sets its values from the given parameter

    Parameters:

    dataArray - values to set the matrix to, must be 9 floats long

• Method Detail

  • getArray

    public float[] getArray()

    Return a reference to the internal array representing matrix values. Modifying this array will also change the matrix

    Returns:

    internal array representing the matrix

  • get

    public float get(int x,
            int y)

    Returns the value for a given row and column

    Parameters:

    x - column of the value to return

    y - row of the value to return

    Returns:

    value in the yth row and xth column

  • set

    public void set(int x,
           int y,
           float v)

    Sets the value for a given row and column

    Parameters:

    x - column of the value to set

    y - row of the value to set

  • loadIdentity

    public void loadIdentity()

    Sets the matrix values to identity

  • load

    public void load(Matrix3f src)

    Sets the values of the matrix to those of the parameter

    Parameters:

    src - matrix to load the values from

  • loadRotate

    public void loadRotate(float rot,
                  float x,
                  float y,
                  float z)

    Sets current values to be a rotation matrix of certain angle about a given axis

    Parameters:

    rot - angle of rotation

    x - rotation axis x

    y - rotation axis y

    z - rotation axis z

  • loadRotate

    public void loadRotate(float rot)

    Makes the upper 2x2 a rotation matrix of the given angle

    Parameters:

    rot - rotation angle

  • loadScale

    public void loadScale(float x,
                 float y)

    Makes the upper 2x2 a scale matrix of given dimensions

    Parameters:

    x - scale component x

    y - scale component y

  • loadScale

    public void loadScale(float x,
                 float y,
                 float z)

    Sets current values to be a scale matrix of given dimensions

    Parameters:

    x - scale component x

    y - scale component y

    z - scale component z

  • loadTranslate

    public void loadTranslate(float x,
                     float y)

    Sets current values to be a translation matrix of given dimensions

    Parameters:

    x - translation component x

    y - translation component y

  • loadMultiply

    public void loadMultiply(Matrix3f lhs,
                    Matrix3f rhs)

    Sets current values to be the result of multiplying two given matrices

    Parameters:

    lhs - left hand side matrix

    rhs - right hand side matrix

  • multiply

    public void multiply(Matrix3f rhs)

    Post-multiplies the current matrix by a given parameter

    Parameters:

    rhs - right hand side to multiply by

  • rotate

    public void rotate(float rot,
              float x,
              float y,
              float z)

    Modifies the current matrix by post-multiplying it with a rotation matrix of certain angle about a given axis

    Parameters:

    rot - angle of rotation

    x - rotation axis x

    y - rotation axis y

    z - rotation axis z

  • rotate

    public void rotate(float rot)

    Modifies the upper 2x2 of the current matrix by post-multiplying it with a rotation matrix of given angle

    Parameters:

    rot - angle of rotation

  • scale

    public void scale(float x,
             float y)

    Modifies the upper 2x2 of the current matrix by post-multiplying it with a scale matrix of given dimensions

    Parameters:

    x - scale component x

    y - scale component y

  • scale

    public void scale(float x,
             float y,
             float z)

    Modifies the current matrix by post-multiplying it with a scale matrix of given dimensions

    Parameters:

    x - scale component x

    y - scale component y

    z - scale component z

  • translate

    public void translate(float x,
                 float y)

    Modifies the current matrix by post-multiplying it with a translation matrix of given dimensions

    Parameters:

    x - translation component x

    y - translation component y

  • transpose

    public void transpose()

    Sets the current matrix to its transpose