/*  This file is part of the source code for 3D-XplorMath-J, Version 1.0 (January 2008).
 *  Copyright (c) 2008 The 3D-XplorMath Consortium (http://3d-xplormath.org).
 *  This source code is released under a BSD License, which allows redistribution   
 *  in source and binary form, with or without modification, provided copyright
 *  and license information are included, and with no warranty or guarantee of
 *  any kind.  For details, see http://3d-xplormath.org/j/source/BSDLicense.txt
 */
 
 package vmm3d.surface.implicit;

import vmm3d.core.RealParamAnimateable;
import vmm3d.core3D.Vector3D;

public class Torus extends SurfaceImplicit {

	public static double sqr(double x){return x*x;}
	
	private RealParamAnimateable a = new RealParamAnimateable("vmm3d.surface.implicit.Torus.a", 1, 1, 1);
	private RealParamAnimateable b = new RealParamAnimateable("vmm3d.surface.implicit.Torus.b", 2, 2, 3);


	public double heightFunction(double x, double y, double z) {
		double height;
		double bb = b.getValue();
//		double aa = a.getValue();
		
	
		double xsqr=sqr(x); double ysqr = sqr(y); double zsqr = sqr(z);
//		double aasqr = sqr(aa);
		height =  sqr( Math.sqrt(xsqr + ysqr) - bb) + zsqr; 
		return height;
	}
	
	public Torus(){
		addParameter(b);
		addParameter(a);
		setDefaultWindow(-3.0, 3.0, -3.0, 3.0);
		setDefaultViewpoint(new Vector3D(-20,23,24));
		searchRadius.reset(3);
		randomLineCount.reset(60000);
		pointCloudCount.reset(12000);
		level.reset(1.0,1,0.05);
		setFramesForMorphing(12);
	}

}