Initial creation of vecmath sources in CVS repository

git-svn-id: https://svn.java.net/svn/vecmath~svn/trunk@5 dd45e54d-f42e-c781-df72-dca083a658b1

1 files changed, 541 insertions, 0 deletions

diff --git a/src/javax/vecmath/Tuple2f.java b/src/javax/vecmath/Tuple2f.java
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+++ b/src/javax/vecmath/Tuple2f.java
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+/*
+ * $RCSfile$
+ *
+ * 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 generic 2-element tuple that is represented by single-precision  
+ * floating point x,y coordinates.
+ *
+ */
+public abstract class Tuple2f implements java.io.Serializable, Cloneable {
+
+    static final long serialVersionUID = 9011180388985266884L;
+
+    /**
+     * The x coordinate.
+     */
+    public	float	x;
+
+    /**
+     * The y coordinate.
+     */
+    public	float	y;
+
+
+    /**
+     * Constructs and initializes a Tuple2f from the specified xy coordinates.
+     * @param x the x coordinate
+     * @param y the y coordinate
+     */
+    public Tuple2f(float x, float y)
+    {
+	this.x = x;
+	this.y = y;
+    }
+
+
+    /**
+     * Constructs and initializes a Tuple2f from the specified array.
+     * @param t the array of length 2 containing xy in order
+     */
+    public Tuple2f(float[] t)
+    {
+	this.x = t[0];
+	this.y = t[1];
+    }
+
+
+    /**
+     * Constructs and initializes a Tuple2f from the specified Tuple2f.
+     * @param t1 the Tuple2f containing the initialization x y data
+     */
+    public Tuple2f(Tuple2f t1)
+    {
+	this.x = t1.x;
+	this.y = t1.y;
+    }
+
+
+    /**
+     * Constructs and initializes a Tuple2f from the specified Tuple2d.
+     * @param t1 the Tuple2d containing the initialization x y data
+     */
+    public Tuple2f(Tuple2d t1)
+    {
+	this.x = (float) t1.x;
+	this.y = (float) t1.y;
+    }
+
+
+    /**
+     * Constructs and initializes a Tuple2f to (0,0).
+     */
+    public Tuple2f()
+    {
+	this.x = (float) 0.0;
+	this.y = (float) 0.0;
+    }
+
+
+    /**
+     * Sets the value of this tuple to the specified xy coordinates.
+     * @param x the x coordinate
+     * @param y the y coordinate
+     */
+    public final void set(float x, float y)
+    {
+	this.x = x;
+	this.y = y;
+    }
+
+
+    /**
+     * Sets the value of this tuple from the 2 values specified in 
+     * the array.
+     * @param t the array of length 2 containing xy in order
+     */
+    public final void set(float[] t)
+    {
+	this.x = t[0];
+	this.y = t[1];
+    }
+
+
+    /**
+     * Sets the value of this tuple to the value of the Tuple2f argument.
+     * @param t1 the tuple to be copied
+     */
+    public final void set(Tuple2f t1)
+    {
+	this.x = t1.x;
+	this.y = t1.y;
+    }
+ 
+
+    /**
+     * Sets the value of this tuple to the value of the Tuple2d argument.
+     * @param t1 the tuple to be copied
+     */
+    public final void set(Tuple2d t1)
+    {
+	this.x = (float) t1.x;
+	this.y = (float) t1.y;
+    }
+
+
+   /**
+    *  Copies the value of the elements of this tuple into the array t.
+    *  @param t the array that will contain the values of the vector
+    */
+   public final void get(float[] t)
+    {
+        t[0] = this.x;
+        t[1] = this.y;
+    }
+
+
+    /**
+     * Sets the value of this tuple to the vector sum of tuples t1 and t2.
+     * @param t1 the first tuple
+     * @param t2 the second tuple
+     */
+    public final void add(Tuple2f t1, Tuple2f t2)
+    {
+	this.x = t1.x + t2.x;
+	this.y = t1.y + t2.y;
+    }
+
+
+    /**
+     * Sets the value of this tuple to the vector sum of itself and tuple t1.
+     * @param t1 the other tuple
+     */  
+    public final void add(Tuple2f t1)
+    {
+        this.x += t1.x;
+        this.y += t1.y;
+    }
+
+
+    /**
+     * Sets the value of this tuple to the vector difference of 
+     * tuple t1 and t2 (this = t1 - t2).    
+     * @param t1 the first tuple
+     * @param t2 the second tuple
+     */  
+    public final void sub(Tuple2f t1, Tuple2f t2)
+    {
+        this.x = t1.x - t2.x;
+        this.y = t1.y - t2.y;
+    }  
+
+
+    /**
+     * Sets the value of this tuple to the vector difference of
+     * itself and tuple t1 (this = this - t1).
+     * @param t1 the other tuple
+     */  
+    public final void sub(Tuple2f t1)
+    {
+        this.x -= t1.x;
+        this.y -= t1.y;
+    }
+
+
+    /**
+     * Sets the value of this tuple to the negation of tuple t1.
+     * @param t1 the source tuple
+     */
+    public final void negate(Tuple2f t1)
+    {
+	this.x = -t1.x;
+	this.y = -t1.y;
+    }
+
+
+    /**
+     * Negates the value of this vector in place.
+     */
+    public final void negate()
+    {
+	this.x = -this.x;
+	this.y = -this.y;
+    }
+
+
+    /**
+     * 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, Tuple2f t1)
+    {
+	this.x = s*t1.x;
+	this.y = s*t1.y;
+    }
+
+
+    /**
+     * Sets the value of this tuple to the scalar multiplication
+     * of itself.
+     * @param s the scalar value
+     */
+    public final void scale(float s)
+    {
+	this.x *= s;
+	this.y *= s;
+    }
+
+
+    /**
+     * Sets the value of this tuple to the scalar multiplication
+     * of tuple t1 and then adds 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, Tuple2f t1, Tuple2f t2)
+    {
+        this.x = s*t1.x + t2.x; 
+        this.y = s*t1.y + t2.y; 
+    } 
+ 
+
+    /**
+     * 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, Tuple2f t1)
+    {
+        this.x = s*this.x + t1.x;
+        this.y = s*this.y + t1.y;
+    }
+
+
+
+    /**
+     * Returns a hash code value based on the data values in this
+     * object.  Two different Tuple2f objects with identical data values
+     * (i.e., Tuple2f.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)Float.floatToIntBits(x);
+	bits = 31L * bits + (long)Float.floatToIntBits(y);
+	return (int) (bits ^ (bits >> 32));
+    }
+
+
+   /**   
+     * Returns true if all of the data members of Tuple2f t1 are
+     * equal to the corresponding data members in this Tuple2f.
+     * @param t1  the vector with which the comparison is made
+     * @return  true or false
+     */  
+    public boolean equals(Tuple2f t1)
+    {
+        try {
+           return(this.x == t1.x && this.y == t1.y);
+        }
+        catch (NullPointerException e2) {return false;}
+
+    }
+
+   /**   
+     * Returns true if the Object t1 is of type Tuple2f and all of the
+     * data members of t1 are equal to the corresponding data members in
+     * this Tuple2f.
+     * @param t1  the object with which the comparison is made
+     * @return  true or false
+     */  
+    public boolean equals(Object t1)
+    {
+        try {
+           Tuple2f t2 = (Tuple2f) t1;
+           return(this.x == t2.x && this.y == t2.y);
+        }
+        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)]. 
+     * @param t1  the tuple to be compared to this tuple
+     * @param epsilon  the threshold value  
+     * @return  true or false
+     */
+    public boolean epsilonEquals(Tuple2f 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;
+
+       return true;
+    }
+
+   /**
+     * Returns a string that contains the values of this Tuple2f.
+     * The form is (x,y).
+     * @return the String representation
+     */  
+   public String toString()
+   {
+        return("(" + this.x + ", " + this.y + ")");
+   }
+
+
+  /**
+    *  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, Tuple2f 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;
+        }
+
+   }
+
+
+  /** 
+    *  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, Tuple2f t) 
+   { 
+        if( t.x < min ) { 
+          x = min;
+        } else {
+          x = t.x;
+        }
+
+        if( t.y < min ) { 
+          y = min;
+        } else {
+          y = t.y;
+        }
+
+   } 
+
+
+  /**  
+    *  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, Tuple2f t)  
+   {  
+        if( t.x > max ) { 
+          x = max;
+        } else { 
+          x = t.x;
+        }
+ 
+        if( t.y > max ) {
+          y = max;
+        } else {
+          y = t.y;
+        }
+
+   } 
+
+
+  /**  
+    *  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(Tuple2f t)
+  {
+       x = Math.abs(t.x);
+       y = Math.abs(t.y);
+  } 
+
+
+
+  /**
+    *  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;
+        }
+
+   }
+
+ 
+  /**
+    *  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;
+   } 
+ 
+ 
+  /**
+    *  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;
+   }
+
+
+  /**
+    *  Sets each component of this tuple to its absolute value.
+    */
+  public final void absolute()
+  {
+     x = Math.abs(x);
+     y = Math.abs(y);
+  }
+
+
+  /** 
+    *  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 final void interpolate(Tuple2f t1, Tuple2f t2, float alpha)
+  {
+           this.x = (1-alpha)*t1.x + alpha*t2.x;
+           this.y = (1-alpha)*t1.y + alpha*t2.y;
+ 
+  }
+
+
+  /**  
+    *  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 final void interpolate(Tuple2f t1, float alpha) 
+  { 
+
+     this.x = (1-alpha)*this.x + alpha*t1.x;
+     this.y = (1-alpha)*this.y + alpha*t1.y;
+
+  } 
+
+    /**
+     * 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();
+	}
+    }
+
+}