path: root/src/javax/vecmath/Tuple4f.java

/*
 * $RCSfile$
 *
 * Copyright (c) 2006 Sun Microsystems, Inc. All rights reserved.
 *
 * Use is subject to license terms.
 *
 * $Revision$
 * $Date$
 * $State$
 */

package javax.vecmath;

import java.lang.Math;

/**
 * A 4-element tuple represented by single-precision floating point x,y,z,w 
 * coordinates.
 *
 */
public abstract class Tuple4f implements java.io.Serializable, Cloneable {

  static final long serialVersionUID =  7068460319248845763L;

  /**
   * The x coordinate.
   */
  public	float	x;

  /**
   * The y coordinate.
   */
  public	float	y;

  /**
   * The z coordinate.
   */
  public	float	z;

  /**
   * The w coordinate.
   */
  public	float	w;


  /**
   * Constructs and initializes a Tuple4f from the specified xyzw coordinates.
   * @param x the x coordinate
   * @param y the y coordinate
   * @param z the z coordinate
   * @param w the w coordinate
   */
  public Tuple4f(float x, float y, float z, float w)
  {
    this.x = x;
    this.y = y;
    this.z = z;
    this.w = w;
  }


  /**
   * Constructs and initializes a Tuple4f from the array of length 4. 
   * @param t the array of length 4 containing xyzw in order
   */
  public Tuple4f(float[] t)
  {
    this.x = t[0];
    this.y = t[1];
    this.z = t[2];
    this.w = t[3];
  }


  /**
   * Constructs and initializes a Tuple4f from the specified Tuple4f.
   * @param t1 the Tuple4f containing the initialization x y z w data
   */
  public Tuple4f(Tuple4f t1)
  {
    this.x = t1.x;
    this.y = t1.y;
    this.z = t1.z;
    this.w = t1.w;
  }


  /**
   * Constructs and initializes a Tuple4f from the specified Tuple4d.
   * @param t1 the Tuple4d containing the initialization x y z w data
   */
  public Tuple4f(Tuple4d t1)
  {
    this.x = (float) t1.x;
    this.y = (float) t1.y;
    this.z = (float) t1.z;
    this.w = (float) t1.w;
  }


  /**
   * Constructs and initializes a Tuple4f to (0,0,0,0).
   */
  public Tuple4f()
  {
    this.x = 0.0f;
    this.y = 0.0f;
    this.z = 0.0f;
    this.w = 0.0f;
  }


    /**
     * Sets the value of this tuple to the specified xyzw coordinates.
     * @param x the x coordinate
     * @param y the y coordinate
     * @param z the z coordinate
     * @param w the w coordinate
     */
    public final void set(float x, float y, float z, float w)
    {
	this.x = x;
	this.y = y;
	this.z = z;
	this.w = w;
    }


    /**
     * Sets the value of this tuple to the specified coordinates in the
     * array of length 4.
     * @param t the array of length 4 containing xyzw in order
     */
    public final void set(float[] t)
    {
	this.x = t[0];
	this.y = t[1];
	this.z = t[2];
	this.w = t[3];
    }


    /**
     * Sets the value of this tuple to the value of tuple t1.
     * @param t1 the tuple to be copied
     */
    public final void set(Tuple4f t1)
    {
	this.x = t1.x;
	this.y = t1.y;
	this.z = t1.z;
	this.w = t1.w;
    }


    /**
     * Sets the value of this tuple to the value of tuple t1.
     * @param t1 the tuple to be copied
     */
    public final void set(Tuple4d t1)
    {
	this.x = (float) t1.x;
	this.y = (float) t1.y;
	this.z = (float) t1.z;
	this.w = (float) t1.w;
    }


    /**
     * Copies the values of this tuple into the array t.
     * @param t the array 
     */
   public final void get(float[] t)
   {
      t[0] = this.x;
      t[1] = this.y;
      t[2] = this.z;
      t[3] = this.w;
   } 

 
    /**  
     * Copies the values of this tuple into the tuple t.
     * @param t the target tuple
     */ 
   public final void get(Tuple4f t)
   {
      t.x = this.x;
      t.y = this.y;
      t.z = this.z;
      t.w = this.w;
   }


  /**
   * Sets the value of this tuple to the sum of tuples t1 and t2.
   * @param t1 the first tuple
   * @param t2 the second tuple
   */
  public final void add(Tuple4f t1, Tuple4f t2)
  {
    this.x = t1.x + t2.x;
    this.y = t1.y + t2.y;
    this.z = t1.z + t2.z;
    this.w = t1.w + t2.w;
  }


  /**
   * Sets the value of this tuple to the sum of itself and t1.
   * @param t1 the other tuple
   */
  public final void add(Tuple4f t1)
  { 
    this.x += t1.x;
    this.y += t1.y;
    this.z += t1.z;
    this.w += t1.w;
  }


  /**
   * Sets the value of this tuple to the difference
   * of tuples t1 and t2 (this = t1 - t2).
   * @param t1 the first tuple
   * @param t2 the second tuple
   */
  public final void sub(Tuple4f t1, Tuple4f t2)
  {
    this.x = t1.x - t2.x;
    this.y = t1.y - t2.y;
    this.z = t1.z - t2.z;
    this.w = t1.w - t2.w;
  }


  /**
   * Sets the value of this tuple to the difference
   * of itself and t1 (this = this - t1).
   * @param t1 the other tuple 
   */
  public final void sub(Tuple4f t1)
  { 
    this.x -= t1.x;
    this.y -= t1.y;
    this.z -= t1.z;
    this.w -= t1.w;
  }


  /**
   * Sets the value of this tuple to the negation of tuple t1.
   * @param t1 the source tuple
   */
  public final void negate(Tuple4f t1)
  {
    this.x = -t1.x;
    this.y = -t1.y;
    this.z = -t1.z;
    this.w = -t1.w;
  }


  /**
   * Negates the value of this tuple in place.
   */
  public final void negate()
  {
    this.x = -this.x;
    this.y = -this.y;
    this.z = -this.z;
    this.w = -this.w;
  }


  /**
   * Sets the value of this tuple to the scalar multiplication
   * of tuple t1.
   * @param s the scalar value
   * @param t1 the source tuple
   */
  public final void scale(float s, Tuple4f t1)
  {
    this.x = s*t1.x;
    this.y = s*t1.y;
    this.z = s*t1.z;
    this.w = s*t1.w;
  }


  /**
   * Sets the value of this tuple to the scalar multiplication
   * of the scale factor with this.
   * @param s the scalar value
   */
  public final void scale(float s)
  {
    this.x *= s;
    this.y *= s;
    this.z *= s;
    this.w *= s;
  }


  /**
   * Sets the value of this tuple to the scalar multiplication
   * of tuple t1 plus tuple t2 (this = s*t1 + t2).
   * @param s the scalar value
   * @param t1 the tuple to be multipled
   * @param t2 the tuple to be added
   */
  public final void scaleAdd(float s, Tuple4f t1, Tuple4f t2)
  {
    this.x = s*t1.x + t2.x;
    this.y = s*t1.y + t2.y;
    this.z = s*t1.z + t2.z;
    this.w = s*t1.w + t2.w;
  }


    /**
     * Sets the value of this tuple to the scalar multiplication
     * of itself and then adds tuple t1 (this = s*this + t1).
     * @param s the scalar value
     * @param t1 the tuple to be added
     */  
    public final void scaleAdd(float s, Tuple4f t1)
    {
        this.x = s*this.x + t1.x;
        this.y = s*this.y + t1.y;
        this.z = s*this.z + t1.z;
        this.w = s*this.w + t1.w;
    }



   /**
     * Returns a string that contains the values of this Tuple4f.
     * The form is (x,y,z,w).
     * @return the String representation
     */  
    public String toString() {
        return "(" + this.x + ", " + this.y + ", " + this.z + ", " + this.w + ")";
    }

   /**
     * Returns true if all of the data members of Tuple4f t1 are
     * equal to the corresponding data members in this Tuple4f.
     * @param t1  the vector with which the comparison is made
     * @return  true or false
     */  
    public boolean equals(Tuple4f t1)
    {
        try {
        return(this.x == t1.x && this.y == t1.y && this.z == t1.z
            && this.w == t1.w);
        }
        catch (NullPointerException e2) {return false;}
    }

   /**
     * Returns true if the Object t1 is of type Tuple4f and all of the
     * data members of t1 are equal to the corresponding data members in
     * this Tuple4f.
     * @param t1  the object with which the comparison is made
     * @return  true or false
     */
    public boolean equals(Object t1)
    {
        try {
           Tuple4f t2 = (Tuple4f) t1;
           return(this.x == t2.x && this.y == t2.y && 
                  this.z == t2.z && this.w == t2.w);
        }
        catch (NullPointerException e2) {return false;}
        catch (ClassCastException   e1) {return false;}
    }


   /**
     * Returns true if the L-infinite distance between this tuple
     * and tuple t1 is less than or equal to the epsilon parameter, 
     * otherwise returns false.  The L-infinite
     * distance is equal to 
     * MAX[abs(x1-x2), abs(y1-y2), abs(z1-z2), abs(w1-w2)].
     * @param t1  the tuple to be compared to this tuple
     * @param epsilon  the threshold value  
     * @return  true or false
     */
    public boolean epsilonEquals(Tuple4f t1, float epsilon)
    {
       float diff;

       diff = x - t1.x;
       if((diff<0?-diff:diff) > epsilon) return false;

       diff = y - t1.y;
       if((diff<0?-diff:diff) > epsilon) return false;

       diff = z - t1.z;
       if((diff<0?-diff:diff) > epsilon) return false;

       diff = w - t1.w;
       if((diff<0?-diff:diff) > epsilon) return false;

       return true;
    }


    /**
     * Returns a hash code value based on the data values in this
     * object.  Two different Tuple4f objects with identical data values
     * (i.e., Tuple4f.equals returns true) will return the same hash
     * code value.  Two objects with different data members may return the
     * same hash value, although this is not likely.
     * @return the integer hash code value
     */  
    public int hashCode() {
	long bits = 1L;
	bits = 31L * bits + (long)VecMathUtil.floatToIntBits(x);
	bits = 31L * bits + (long)VecMathUtil.floatToIntBits(y);
	bits = 31L * bits + (long)VecMathUtil.floatToIntBits(z);
	bits = 31L * bits + (long)VecMathUtil.floatToIntBits(w);
	return (int) (bits ^ (bits >> 32));
    }


  /**
    *  Clamps the tuple parameter to the range [low, high] and 
    *  places the values into this tuple.  
    *  @param min   the lowest value in the tuple after clamping
    *  @param max  the highest value in the tuple after clamping 
    *  @param t   the source tuple, which will not be modified
    */
   public final void clamp(float min, float max, Tuple4f t)
   {
        if( t.x > max ) {
          x = max;
        } else if( t.x < min ){
          x = min;
        } else { 
          x = t.x;
        }
 
        if( t.y > max ) {
          y = max;
        } else if( t.y < min ){
          y = min;
        } else {
          y = t.y;
        }
 
        if( t.z > max ) {
          z = max;
        } else if( t.z < min ){
          z = min;
        } else {
          z = t.z;
        }

        if( t.w > max ) {
          w = max;
        } else if( t.w < min ){
          w = min;
        } else {
          w = t.w;
        }

   }


  /** 
    *  Clamps the minimum value of the tuple parameter to the min 
    *  parameter and places the values into this tuple.
    *  @param min   the lowest value in the tuple after clamping 
    *  @param t   the source tuple, which will not be modified
    */   
   public final void clampMin(float min, Tuple4f t) 
   { 
        if( t.x < min ) {
          x = min;
        } else {
          x = t.x;
        }
 
        if( t.y < min ) {
          y = min;
        } else {
          y = t.y;
        }
 
        if( t.z < min ) {
          z = min;
        } else {
          z = t.z;
        }
 
        if( t.w < min ) {
          w = min;
        } else {
          w = t.w;
        }
 

   } 


  /**  
    *  Clamps the maximum value of the tuple parameter to the max 
    *  parameter and places the values into this tuple.
    *  @param max   the highest value in the tuple after clamping  
    *  @param t   the source tuple, which will not be modified
    */    
   public final void clampMax(float max, Tuple4f t)  
   {  
        if( t.x > max ) {
          x = max;
        } else {
          x = t.x;
        }
 
        if( t.y > max ) {
          y = max;
        } else {
          y = t.y;
        }
 
        if( t.z > max ) {
          z = max;
        } else {
          z = t.z;
        }
 
        if( t.w > max ) {
          w = max;
        } else {
          w = t.z;
        }

   } 


  /**  
    *  Sets each component of the tuple parameter to its absolute 
    *  value and places the modified values into this tuple.
    *  @param t   the source tuple, which will not be modified
    */    
  public final void absolute(Tuple4f t)
  {
       x = Math.abs(t.x);
       y = Math.abs(t.y);
       z = Math.abs(t.z);
       w = Math.abs(t.w);
  } 


  /**
    *  Clamps this tuple to the range [low, high].
    *  @param min  the lowest value in this tuple after clamping
    *  @param max  the highest value in this tuple after clamping
    */
   public final void clamp(float min, float max)
   {
       if( x > max ) {
          x = max;
        } else if( x < min ){
          x = min;
        }
 
        if( y > max ) {
          y = max;
        } else if( y < min ){
          y = min;
        }
 
        if( z > max ) {
          z = max;
        } else if( z < min ){
          z = min;
        }
 
        if( w > max ) {
          w = max;
        } else if( w < min ){
          w = min;
        }

   }

 
  /**
    *  Clamps the minimum value of this tuple to the min parameter.
    *  @param min   the lowest value in this tuple after clamping
    */
   public final void clampMin(float min)
   { 
      if( x < min ) x=min;
      if( y < min ) y=min;
      if( z < min ) z=min;
      if( w < min ) w=min;

   } 
 
 
  /**
    *  Clamps the maximum value of this tuple to the max parameter.
    *  @param max   the highest value in the tuple after clamping
    */
   public final void clampMax(float max)
   { 
      if( x > max ) x=max;
      if( y > max ) y=max;
      if( z > max ) z=max;
      if( w > max ) w=max;

   }


  /**
    *  Sets each component of this tuple to its absolute value.
    */
  public final void absolute()
  {
     x = Math.abs(x);
     y = Math.abs(y);
     z = Math.abs(z);
     w = Math.abs(w);
  }


  /**  
    *  Linearly interpolates between tuples t1 and t2 and places the 
    *  result into this tuple:  this = (1-alpha)*t1 + alpha*t2.
    *  @param t1  the first tuple
    *  @param t2  the second tuple  
    *  @param alpha  the alpha interpolation parameter  
    */   
  public void interpolate(Tuple4f t1, Tuple4f t2, float alpha) 
  { 
           this.x = (1-alpha)*t1.x + alpha*t2.x;
           this.y = (1-alpha)*t1.y + alpha*t2.y;
           this.z = (1-alpha)*t1.z + alpha*t2.z;
           this.w = (1-alpha)*t1.w + alpha*t2.w;

  } 
 
 
  /**   
    *  Linearly interpolates between this tuple and tuple t1 and 
    *  places the result into this tuple:  this = (1-alpha)*this + alpha*t1. 
    *  @param t1  the first tuple 
    *  @param alpha  the alpha interpolation parameter   
    */    
  public void interpolate(Tuple4f t1, float alpha)  
  {  
     this.x = (1-alpha)*this.x + alpha*t1.x;
     this.y = (1-alpha)*this.y + alpha*t1.y;
     this.z = (1-alpha)*this.z + alpha*t1.z;
     this.w = (1-alpha)*this.w + alpha*t1.w;

  }  
 
    /**
     * Creates a new object of the same class as this object.
     *
     * @return a clone of this instance.
     * @exception OutOfMemoryError if there is not enough memory.
     * @see java.lang.Cloneable
     * @since vecmath 1.3
     */
    public Object clone() {
	// Since there are no arrays we can just use Object.clone()
	try {
	    return super.clone();
	} catch (CloneNotSupportedException e) {
	    // this shouldn't happen, since we are Cloneable
	    throw new InternalError();
	}
    }

}