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, 209 insertions, 0 deletions

diff --git a/src/javax/vecmath/Vector4f.java b/src/javax/vecmath/Vector4f.java
new file mode 100644
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+++ b/src/javax/vecmath/Vector4f.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 4-element vector represented by single-precision floating point x,y,z,w 
+ * coordinates.
+ *
+ */
+public class Vector4f extends Tuple4f implements java.io.Serializable {
+
+  // Compatible with 1.1
+  static final long serialVersionUID = 8749319902347760659L;
+
+  /**
+   * Constructs and initializes a Vector4f 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 Vector4f(float x, float y, float z, float w)
+  {
+       super(x,y,z,w);
+  }
+
+
+  /**
+   * Constructs and initializes a Vector4f from the array of length 4. 
+   * @param v the array of length 4 containing xyzw in order
+   */
+  public Vector4f(float[] v)
+  {
+     super(v);
+  }
+
+
+  /**
+   * Constructs and initializes a Vector4f from the specified Vector4f.
+   * @param v1 the Vector4f containing the initialization x y z w data
+   */
+  public Vector4f(Vector4f v1)
+  {
+      super(v1);
+  }
+
+
+  /**
+   * Constructs and initializes a Vector4f from the specified Vector4d.
+   * @param v1 the Vector4d containing the initialization x y z w data
+   */
+  public Vector4f(Vector4d v1)
+  {
+      super(v1);
+  }
+
+
+    /**
+     * Constructs and initializes a Vector4f from the specified Tuple4f.
+     * @param t1 the Tuple4f containing the initialization x y z w data
+     */  
+    public Vector4f(Tuple4f t1) 
+    {
+       super(t1);
+    }
+
+
+    /**
+     * Constructs and initializes a Vector4f from the specified Tuple4d.
+     * @param t1 the Tuple4d containing the initialization x y z w data 
+     */  
+    public Vector4f(Tuple4d t1) 
+    {
+       super(t1); 
+    }
+
+
+    /**
+     * Constructs and initializes a Vector4f from the specified Tuple3f.
+     * The x,y,z components of this vector are set to the corresponding
+     * components of tuple t1.  The w component of this vector
+     * is set to 0.
+     * @param t1 the tuple to be copied
+     *
+     * @since Java 3D 1.2
+     */
+    public Vector4f(Tuple3f t1) {
+	super(t1.x, t1.y, t1.z, 0.0f);
+    }
+
+
+  /**
+   * Constructs and initializes a Vector4f to (0,0,0,0).
+   */
+  public Vector4f()
+  {
+      super();
+  }
+
+
+    /**
+     * Sets the x,y,z components of this vector to the corresponding
+     * components of tuple t1.  The w component of this vector
+     * is set to 0.
+     * @param t1 the tuple to be copied
+     *
+     * @since Java 3D 1.2
+     */
+    public final void set(Tuple3f t1) {
+	this.x = t1.x;
+	this.y = t1.y;
+	this.z = t1.z;
+	this.w = 0.0f;
+    }
+
+
+ /**
+   * Returns the length of this vector.
+   * @return the length of this vector as a float
+   */
+  public final float length()
+  {
+    return
+      (float) Math.sqrt(this.x*this.x + this.y*this.y +
+                        this.z*this.z + this.w*this.w);
+  }
+
+  /**
+   * Returns the squared length of this vector
+   * @return the squared length of this vector as a float
+   */
+  public final float lengthSquared()
+  {
+    return (this.x*this.x + this.y*this.y +
+            this.z*this.z + this.w*this.w);
+  }
+
+  /**
+   * returns the dot product of this vector and v1
+   * @param v1 the other vector
+   * @return the dot product of this vector and v1
+   */
+  public final float dot(Vector4f v1)
+    {
+      return (this.x*v1.x + this.y*v1.y + this.z*v1.z + this.w*v1.w);
+    }
+
+
+ /**
+   * Sets the value of this vector to the normalization of vector v1.
+   * @param v1 the un-normalized vector
+   */
+  public final void normalize(Vector4f v1)
+  {
+    float norm;
+
+    norm = (float) (1.0/Math.sqrt(v1.x*v1.x + v1.y*v1.y +
+                                  v1.z*v1.z + v1.w*v1.w));
+    this.x = v1.x*norm;
+    this.y = v1.y*norm;
+    this.z = v1.z*norm;
+    this.w = v1.w*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.w*this.w));
+    this.x *= norm;
+    this.y *= norm;
+    this.z *= norm;
+    this.w *= norm;
+  }
+
+
+  /** 
+    *   Returns the (4-space) 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(Vector4f 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 )));
+   } 
+
+}