1 files changed, 186 insertions, 0 deletions
diff --git a/src/javax/vecmath/Vector3f.java b/src/javax/vecmath/Vector3f.java
new file mode 100644
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+++ b/src/javax/vecmath/Vector3f.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 3-element vector that is represented by single-precision floating point 
+ * x,y,z coordinates.  If this value represents a normal, then it should
+ * be normalized.
+ *
+ */
+public class Vector3f extends Tuple3f implements java.io.Serializable {
+
+    // Combatible with 1.1
+    static final long serialVersionUID = -7031930069184524614L;
+
+    /**
+     * Constructs and initializes a Vector3f from the specified xyz coordinates.
+     * @param x the x coordinate
+     * @param y the y coordinate
+     * @param z the z coordinate
+     */
+    public Vector3f(float x, float y, float z)
+    {
+        super(x,y,z);
+    }
+
+
+    /**
+     * Constructs and initializes a Vector3f from the array of length 3.
+     * @param v the array of length 3 containing xyz in order
+     */
+    public Vector3f(float[] v)
+    {
+       super(v);
+    }
+
+
+    /**
+     * Constructs and initializes a Vector3f from the specified Vector3f.
+     * @param v1 the Vector3f containing the initialization x y z data
+     */
+    public Vector3f(Vector3f v1)
+    {
+       super(v1);
+    }
+
+
+    /**
+     * Constructs and initializes a Vector3f from the specified Vector3d.
+     * @param v1 the Vector3d containing the initialization x y z data
+     */
+    public Vector3f(Vector3d v1)
+    {
+       super(v1);
+    }
+
+
+    /**
+     * Constructs and initializes a Vector3f from the specified Tuple3f.
+     * @param t1 the Tuple3f containing the initialization x y z data
+     */  
+    public Vector3f(Tuple3f t1) {
+       super(t1);
+    }
+
+
+    /**
+     * Constructs and initializes a Vector3f from the specified Tuple3d.
+     * @param t1 the Tuple3d containing the initialization x y z data
+     */  
+    public Vector3f(Tuple3d t1) {
+       super(t1);
+    }
+
+
+    /**
+     * Constructs and initializes a Vector3f to (0,0,0).
+     */
+    public Vector3f()
+    {
+        super();
+    }
+
+
+   /**
+     * Returns the squared length of this vector.
+     * @return the squared length of this vector
+     */
+    public final float lengthSquared()
+    {
+        return (this.x*this.x + this.y*this.y + this.z*this.z);
+    }
+
+    /**
+     * Returns the length of this vector.
+     * @return the length of this vector
+     */
+    public final float length()
+    {
+        return (float)
+             Math.sqrt(this.x*this.x + this.y*this.y + this.z*this.z);
+    }
+
+
+  /**
+     * Sets this vector to be the vector cross product of vectors v1 and v2.
+     * @param v1 the first vector
+     * @param v2 the second vector
+     */
+    public final void cross(Vector3f v1, Vector3f v2)
+    {
+        float x,y;
+
+        x = v1.y*v2.z - v1.z*v2.y;
+        y = v2.x*v1.z - v2.z*v1.x;
+        this.z = v1.x*v2.y - v1.y*v2.x;
+        this.x = x;
+        this.y = y;
+    }
+
+ /**
+   * Computes the dot product of this vector and vector v1.
+   * @param v1 the other vector
+   * @return the dot product of this vector and v1
+   */
+  public final float dot(Vector3f v1)
+    {
+      return (this.x*v1.x + this.y*v1.y + this.z*v1.z);
+    }
+
+   /**
+     * Sets the value of this vector to the normalization of vector v1.
+     * @param v1 the un-normalized vector
+     */
+    public final void normalize(Vector3f v1)
+    {
+        float norm;
+
+        norm = (float) (1.0/Math.sqrt(v1.x*v1.x + v1.y*v1.y + v1.z*v1.z));
+        this.x = v1.x*norm;
+        this.y = v1.y*norm;
+        this.z = v1.z*norm;
+    }
+
+    /**
+     * Normalizes this vector in place.
+     */
+    public final void normalize()
+    {
+        float norm;
+
+        norm = (float)
+               (1.0/Math.sqrt(this.x*this.x + this.y*this.y + this.z*this.z));
+        this.x *= norm;
+        this.y *= norm;
+        this.z *= norm;
+    }
+
+
+  /** 
+    *   Returns the angle in radians between this vector and the vector
+    *   parameter; the return value is constrained to the range [0,PI]. 
+    *   @param v1    the other vector 
+    *   @return   the angle in radians in the range [0,PI] 
+    */   
+   public final float angle(Vector3f v1) 
+   { 
+      double vDot = this.dot(v1) / ( this.length()*v1.length() );
+      if( vDot < -1.0) vDot = -1.0;
+      if( vDot >  1.0) vDot =  1.0;
+      return((float) (Math.acos( vDot )));
+   } 
+
+}