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/*
* $RCSfile$
*
* 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.
*
* $Revision$
* $Date$
* $State$
*/
package javax.vecmath;
import java.lang.Math;
/**
* A 4 element point represented by single precision floating point x,y,z,w
* coordinates.
*
*/
public class Point4f extends Tuple4f implements java.io.Serializable {
// Compatible with 1.1
static final long serialVersionUID = 4643134103185764459L;
/**
* Constructs and initializes a Point4f 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 Point4f(float x, float y, float z, float w)
{
super(x,y,z,w);
}
/**
* Constructs and initializes a Point4f from the array of length 4.
* @param p the array of length 4 containing xyzw in order
*/
public Point4f(float[] p)
{
super(p);
}
/**
* Constructs and initializes a Point4f from the specified Point4f.
* @param p1 the Point4f containing the initialization x y z w data
*/
public Point4f(Point4f p1)
{
super(p1);
}
/**
* Constructs and initializes a Point4f from the specified Point4d.
* @param p1 the Point4d containing the initialization x y z w data
*/
public Point4f(Point4d p1)
{
super(p1);
}
/**
* Constructs and initializes a Point4f from the specified Tuple4f.
* @param t1 the Tuple4f containing the initialization x y z w data
*/
public Point4f(Tuple4f t1)
{
super(t1);
}
/**
* Constructs and initializes a Point4f from the specified Tuple4d.
* @param t1 the Tuple4d containing the initialization x y z w data
*/
public Point4f(Tuple4d t1)
{
super(t1);
}
/**
* Constructs and initializes a Point4f from the specified Tuple3f.
* 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 vecmath 1.2
*/
public Point4f(Tuple3f t1) {
super(t1.x, t1.y, t1.z, 1.0f);
}
/**
* Constructs and initializes a Point4f to (0,0,0,0).
*/
public Point4f()
{
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 vecmath 1.2
*/
public final void set(Tuple3f t1) {
this.x = t1.x;
this.y = t1.y;
this.z = t1.z;
this.w = 1.0f;
}
/**
* Computes the square of the distance between this point and point p1.
* @param p1 the other point
* @return the square of distance between these two points as a float
*/
public final float distanceSquared(Point4f p1)
{
float 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);
}
/**
* Computes the distance between this point and point p1.
* @param p1 the other point
* @return the distance between the two points
*/
public final float distance(Point4f p1)
{
float 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 (float) 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 float distanceL1(Point4f 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 float distanceLinf(Point4f p1)
{
float 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 Point4f 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 Point4f, which is not modified
*/
public final void project(Point4f p1)
{
float oneOw;
oneOw = 1/p1.w;
x = p1.x*oneOw;
y = p1.y*oneOw;
z = p1.z*oneOw;
w = 1.0f;
}
}
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