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+/*
+ * 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.
+ *
+ */
+
+package org.jogamp.vecmath;
+
+
+/**
+ * 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;
+
+ }
+
+}