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Jmol: an open-source Java viewer for chemical structures in 3D

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/*
   Copyright (C) 1997,1998,1999
   Kenji Hiranabe, Eiwa System Management, Inc.

   This program is free software.
   Implemented by Kenji Hiranabe([email protected]),
   conforming to the Java(TM) 3D API specification by Sun Microsystems.

   Permission to use, copy, modify, distribute and sell this software
   and its documentation for any purpose is hereby granted without fee,
   provided that the above copyright notice appear in all copies and
   that both that copyright notice and this permission notice appear
   in supporting documentation. Kenji Hiranabe and Eiwa System Management,Inc.
   makes no representations about the suitability of this software for any
   purpose.  It is provided "AS IS" with NO WARRANTY.
*/
package javajs.util;



/**
 * A 4 element point that is represented by single precision floating point
 * x,y,z,w coordinates.
 * 
 * @version specification 1.1, implementation $Revision: 1.9 $, $Date:
 *          2006/07/28 17:01:32 $
 * @author Kenji hiranabe
 * 
 * additions by Bob Hanson [email protected] 9/30/2012
 * for unique constructor and method names
 * for the optimization of compiled JavaScript using Java2Script
 */
public class P4 extends T4 {

  /**
   * 
   * @j2sIgnore   * 
   */
  public P4() {
    // skip T4() constructor
  }
  
  public static P4 new4(float x, float y, float z, float w) {
    P4 pt = new P4();
    pt.set4(x, y, z, w);
    return pt;
  }

  public static P4 newPt(P4 value) {
    P4 pt = new P4();
    pt.set4(value.x, value.y, value.z, value.w);    
    return pt;
  }

  /**
   * Returns the distance between this point and point p1.
   * 
   * @param p1
   *        the other point
   * @return the distance between these two points
   */
  public final float distance4(P4 p1) {
    double dx = x - p1.x;
    double dy = y - p1.y;
    double dz = z - p1.z;
    double dw = w - p1.w;
    return (float) Math.sqrt(dx * dx + dy * dy + dz * dz + dw * dw);
  }

}