/*
 * $RCSfile$
 *
 * Copyright (c) 2004 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 double precision floating point 
 * x,y,z,w coordinates.
 *
 */
public abstract class Tuple4d implements java.io.Serializable, Cloneable {

    static final long serialVersionUID = -4748953690425311052L;

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

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

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

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


    /**
     * Constructs and initializes a Tuple4d 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 Tuple4d(double x, double y, double z, double w)
    {
	this.x = x;
	this.y = y;
	this.z = z;
	this.w = w;
    }


    /**
     * Constructs and initializes a Tuple4d from the coordinates contained
     * in the array.
     * @param t the array of length 4 containing xyzw in order
     */
    public Tuple4d(double[] t)
    {
	this.x = t[0];
	this.y = t[1];
	this.z = t[2];
	this.w = t[3];
    }


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


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


    /**
     * Constructs and initializes a Tuple4d to (0,0,0,0).
     */
    public Tuple4d()
    {
	this.x = 0.0;
	this.y = 0.0;
	this.z = 0.0;
	this.w = 0.0;
    }


    /**
     * 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(double x, double y, double z, double w)
    {
	this.x = x;
	this.y = y;
	this.z = z;
	this.w = w;
    }


    /**
     * Sets the value of this tuple to the specified xyzw coordinates.
     * @param t the array of length 4 containing xyzw in order
     */
    public final void set(double[] 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(Tuple4d 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(Tuple4f t1)
    {
	this.x = t1.x;
	this.y = t1.y;
	this.z = t1.z;
	this.w = t1.w;
    }


    /**
     * Gets the value of this tuple and places it into the array t of
     * length four in x,y,z,w order.
     * @param t  the array of length four
     */
    public final void get(double[] t)
    {
        t[0] = this.x;
        t[1] = this.y;
        t[2] = this.z;
        t[3] = this.w;
    }


    /**
     * Gets the value of this tuple and places it into the Tuple4d
     * argument of
     * length four in x,y,z,w order.
     * @param t  the Tuple into which the values will be copied
     */
    public final void get(Tuple4d 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 tuple sum of tuples t1 and t2.
     * @param t1 the first tuple
     * @param t2 the second tuple
     */
    public final void add(Tuple4d t1, Tuple4d 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 tuple t1.
     * @param t1 the other tuple
     */
    public final void add(Tuple4d 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(Tuple4d t1, Tuple4d 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 tuple t1 (this = this - t1).
     * @param t1 the other tuple
     */
   public final void sub(Tuple4d 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(Tuple4d 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 the scale factor with the tuple t1.
     * @param s the scalar value
     * @param t1 the source tuple
     */
    public final void scale(double s, Tuple4d 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(double s)
    {
	this.x *= s;
	this.y *= s;
	this.z *= s;
	this.w *= s;
    }


    /**
     * Sets the value of this tuple to the scalar multiplication by s
     * 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(double s, Tuple4d t1, Tuple4d 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;
    }


 
    /**
     * @deprecated Use scaleAdd(double,Tuple4d) instead
     */  
    public final void scaleAdd(float s, Tuple4d t1) {
	scaleAdd((double)s, t1);
    }


    /** 
     * 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(double s, Tuple4d 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 Tuple4d.
     * 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 Tuple4d t1 are
     * equal to the corresponding data members in this Tuple4d.
     * @param t1  the tuple with which the comparison is made
     * @return  true or false
     */  
    public boolean equals(Tuple4d 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 Tuple4d and all of the
     * data members of t1 are equal to the corresponding data members in
     * this Tuple4d.
     * @param t1  the object with which the comparison is made
     * @return  true or false
     */
    public boolean equals(Object t1)
    {
        try {

           Tuple4d t2 = (Tuple4d) 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(Tuple4d t1, double epsilon)
    {
       double 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 Tuple4d objects with identical data values
     * (i.e., Tuple4d.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 + VecMathUtil.doubleToLongBits(x);
	bits = 31L * bits + VecMathUtil.doubleToLongBits(y);
	bits = 31L * bits + VecMathUtil.doubleToLongBits(z);
	bits = 31L * bits + VecMathUtil.doubleToLongBits(w);
	return (int) (bits ^ (bits >> 32));
    }


    /**
     * @deprecated Use clamp(double,double,Tuple4d) instead
     */
    public final void clamp(float min, float max, Tuple4d t) {
	clamp((double)min, (double)max, t);
    }


    /**
     *  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(double min, double max, Tuple4d 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;
        }

   }


    /**
     * @deprecated Use clampMin(double,Tuple4d) instead
     */
    public final void clampMin(float min, Tuple4d t) {
	clampMin((double)min, t);
    }


    /** 
     *  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(double min, Tuple4d 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;
        }

   } 


    /**
     * @deprecated Use clampMax(double,Tuple4d) instead
     */
    public final void clampMax(float max, Tuple4d t) {
	clampMax((double)max, t);
    }


    /**  
     *  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(double max, Tuple4d 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(Tuple4d t)
  {
       x = Math.abs(t.x);
       y = Math.abs(t.y);
       z = Math.abs(t.z);
       w = Math.abs(t.w);

  } 



    /**
     * @deprecated Use clamp(double,double) instead
     */
    public final void clamp(float min, float max) {
	clamp((double)min, (double)max);
    }


    /**
     *  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(double min, double 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;
        }

   }

 
    /**
     * @deprecated Use clampMin(double) instead
     */
    public final void clampMin(float min) {
	clampMin((double)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(double min) { 
      if( x < min ) x=min;
      if( y < min ) y=min;
      if( z < min ) z=min;
      if( w < min ) w=min;
   } 
 
 
    /**
     * @deprecated Use clampMax(double) instead
     */
    public final void clampMax(float max) {
	clampMax((double)max);
    }


    /**
     *  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(double 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);

  }


    /**
     * @deprecated Use interpolate(Tuple4d,Tuple4d,double) instead
     */
    public void interpolate(Tuple4d t1, Tuple4d t2, float alpha) {
	interpolate(t1, t2, (double)alpha);
    }


    /**
     *  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(Tuple4d t1, Tuple4d t2, double 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;
    } 
 
 
    /**
     * @deprecated Use interpolate(Tuple4d,double) instead
     */
    public void interpolate(Tuple4d t1, float alpha) {
	interpolate(t1, (double)alpha);
    }


    /**
     *  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(Tuple4d t1, double 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 Java 3D 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();
	}
    }

}