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/*
* $RCSfile$
*
* Copyright (c) 2005 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 double precision floating point
* x,y,z,w coordinates.
*
*/
public class Point4d extends Tuple4d implements java.io.Serializable {
// Compatible with 1.1
static final long serialVersionUID = 1733471895962736949L;
/**
* Constructs and initializes a Point4d 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 Point4d(double x, double y, double z, double w)
{
super(x,y,z,w);
}
/**
* Constructs and initializes a Point4d from the coordinates contained
* in the array.
* @param p the array of length 4 containing xyzw in order
*/
public Point4d(double[] p)
{
super(p);
}
/**
* Constructs and initializes a Point4d from the specified Point4d.
* @param p1 the Point4d containing the initialization x y z w data
*/
public Point4d(Point4d p1)
{
super(p1);
}
/**
* Constructs and initializes a Point4d from the specified Point4f.
* @param p1 the Point4f containing the initialization x y z w data
*/
public Point4d(Point4f p1)
{
super(p1);
}
/**
* Constructs and initializes a Point4d from the specified Tuple4f.
* @param t1 the Tuple4f containing the initialization x y z w data
*/
public Point4d(Tuple4f t1)
{
super(t1);
}
/**
* Constructs and initializes a Point4d from the specified Tuple4d.
* @param t1 the Tuple4d containing the initialization x y z w data
*/
public Point4d(Tuple4d t1)
{
super(t1);
}
/**
* Constructs and initializes a Point4d from the specified Tuple3d.
* The x,y,z components of this point are set to the corresponding
* components of tuple t1. The w component of this point
* is set to 1.
* @param t1 the tuple to be copied
*
* @since Java 3D 1.2
*/
public Point4d(Tuple3d t1) {
super(t1.x, t1.y, t1.z, 1.0);
}
/**
* Constructs and initializes a Point4d to (0,0,0,0).
*/
public Point4d()
{
super();
}
/**
* Sets the x,y,z components of this point to the corresponding
* components of tuple t1. The w component of this point
* is set to 1.
* @param t1 the tuple to be copied
*
* @since Java 3D 1.2
*/
public final void set(Tuple3d t1) {
this.x = t1.x;
this.y = t1.y;
this.z = t1.z;
this.w = 1.0;
}
/**
* Returns the square of the distance between this point and point p1.
* @param p1 the first point
* @return the square of distance between this point and point p1
*/
public final double distanceSquared(Point4d p1)
{
double dx, dy, dz, dw;
dx = this.x-p1.x;
dy = this.y-p1.y;
dz = this.z-p1.z;
dw = this.w-p1.w;
return (dx*dx+dy*dy+dz*dz+dw*dw);
}
/**
* Returns the distance between this point and point p1.
* @param p1 the first point
* @return the distance between these this point and point p1.
*/
public final double distance(Point4d p1)
{
double dx, dy, dz, dw;
dx = this.x-p1.x;
dy = this.y-p1.y;
dz = this.z-p1.z;
dw = this.w-p1.w;
return Math.sqrt(dx*dx+dy*dy+dz*dz+dw*dw);
}
/**
* Computes the L-1 (Manhattan) distance between this point and
* point p1. The L-1 distance is equal to:
* abs(x1-x2) + abs(y1-y2) + abs(z1-z2) + abs(w1-w2).
* @param p1 the other point
* @return the L-1 distance
*/
public final double distanceL1(Point4d p1) {
return Math.abs(this.x-p1.x) + Math.abs(this.y-p1.y) +
Math.abs(this.z-p1.z) + Math.abs(this.w-p1.w);
}
/**
* Computes the L-infinite distance between this point and
* point p1. The L-infinite distance is equal to
* MAX[abs(x1-x2), abs(y1-y2), abs(z1-z2), abs(w1-w2)].
* @param p1 the other point
* @return the L-infinite distance
*/
public final double distanceLinf(Point4d p1) {
double t1, t2;
t1 = Math.max( Math.abs(this.x-p1.x), Math.abs(this.y-p1.y));
t2 = Math.max( Math.abs(this.z-p1.z), Math.abs(this.w-p1.w));
return Math.max(t1,t2);
}
/**
* Multiplies each of the x,y,z components of the Point4d parameter
* by 1/w, places the projected values into this point, and places
* a 1 as the w parameter of this point.
* @param p1 the source Point4d, which is not modified
*/
public final void project(Point4d p1)
{
double oneOw;
oneOw = 1/p1.w;
x = p1.x*oneOw;
y = p1.y*oneOw;
z = p1.z*oneOw;
w = 1.0;
}
}
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