/*
* $RCSfile: Vector4d.java,v $
*
* Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
* $Revision: 1.6 $
* $Date: 2008/02/28 20:18:51 $
* $State: Exp $
*/
package javax.vecmath;
import java.lang.Math;
/**
* A 4-element vector represented by double-precision floating point x,y,z,w
* coordinates.
*
*/
public class Vector4d extends Tuple4d implements java.io.Serializable {
// Compatible with 1.1
static final long serialVersionUID = 3938123424117448700L;
/**
* Constructs and initializes a Vector4d 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 Vector4d(double x, double y, double z, double w) {
super(x, y, z, w);
}
/**
* Constructs and initializes a Vector4d from the coordinates contained in the
* array.
*
* @param v
* the array of length 4 containing xyzw in order
*/
public Vector4d(double[] v) {
super(v);
}
/**
* Constructs and initializes a Vector4d from the specified Vector4d.
*
* @param v1
* the Vector4d containing the initialization x y z w data
*/
public Vector4d(Vector4d v1) {
super(v1);
}
/**
* Constructs and initializes a Vector4d from the specified Vector4f.
*
* @param v1
* the Vector4f containing the initialization x y z w data
*/
public Vector4d(Vector4f v1) {
super(v1);
}
/**
* Constructs and initializes a Vector4d from the specified Tuple4f.
*
* @param t1
* the Tuple4f containing the initialization x y z w data
*/
public Vector4d(Tuple4f t1) {
super(t1);
}
/**
* Constructs and initializes a Vector4d from the specified Tuple4d.
*
* @param t1
* the Tuple4d containing the initialization x y z w data
*/
public Vector4d(Tuple4d t1) {
super(t1);
}
/**
* Constructs and initializes a Vector4d from the specified Tuple3d. 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 vecmath 1.2
*/
public Vector4d(Tuple3d t1) {
super(t1.x, t1.y, t1.z, 0.0);
}
/**
* Constructs and initializes a Vector4d to (0,0,0,0).
*/
public Vector4d() {
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 vecmath 1.2
*/
public final void set(Tuple3d t1) {
this.x = t1.x;
this.y = t1.y;
this.z = t1.z;
this.w = 0.0;
}
/**
* Returns the length of this vector.
*
* @return the length of this vector
*/
public final double length() {
return 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
*/
public final double 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 vector v1.
*
* @param v1
* the other vector
* @return the dot product of this vector and vector v1
*/
public final double dot(Vector4d 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(Vector4d v1) {
double norm;
norm = 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() {
double norm;
norm = 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 double angle(Vector4d 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 ((double) (Math.acos(vDot)));
}
}