/*
 * Moonlight|3D Copyright (C) 2005 The Moonlight|3D team
 * 
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 * 
 * This library 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 Lesser General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 * 
 * Created on Jan 6, 2005
 */
package ml.test;

import junit.framework.TestCase;
import ml.core.exceptions.Exception;
import ml.math.Vector3D;

/**
 * This is the test case for ml.math.Vector3D
 * 
 * @author gregor
 */
public class Vector3DTest extends TestCase {

    public static void main(String[] args)
    {
        junit.awtui.TestRunner.run(Vector3DTest.class);
    }

    public void testVector3D()
    {
        Vector3D a=new Vector3D();
        assertTrue(a!=null);
    }
    
    public void testAbs()
    {
        Vector3D a=new Vector3D();
        a.X1=1.0; a.X2=1.0; a.X3=1.0;
        
        assertTrue(a.abs()==Math.sqrt(3));
    }
    
    public void testNorm()
    {
        Vector3D a=new Vector3D();
        a.X1=3.0; a.X2=0.0; a.X3=0.0;
        Vector3D b=new Vector3D();
        b.X1=1.0; b.X2=0.0; b.X3=0.0;
        
        assertTrue(a.norm().equals(b));        
    }
    
    public void testEquals() {
        Vector3D a=new Vector3D();
        a.X1=1.0; a.X2=1.0; a.X3=1.0;
        Vector3D b=a.clone();

        assertTrue(a.equals(b));
        assertTrue(b.equals(a));
    }

    public void testAdd()
    {
        Vector3D a=new Vector3D();
        a.X1=1.0; a.X2=1.0; a.X3=1.0;
        Vector3D b=a.clone();
        Vector3D c=new Vector3D();
        c.X1=2.0; c.X2=2.0; c.X3=2.0;
        
        assertTrue(a.add(b).equals(c));
        assertTrue(b.add(a).equals(c));
    }

    public void testSub()
    {
        Vector3D a=new Vector3D();
        a.X1=1.0; a.X2=1.0; a.X3=1.0;
        Vector3D b=a.clone();
        Vector3D c=new Vector3D();
        c.X1=0.0; c.X2=0.0; c.X3=0.0;
        
        assertTrue(a.sub(b).equals(c));
        assertTrue(b.sub(a).equals(c));
    }
    
    public void testMultiplyScalar()
    {
        Vector3D a=new Vector3D();
        a.X1=1.0; a.X2=1.0; a.X3=1.0;
        
        Vector3D c=new Vector3D();
        c.X1=2.0; c.X2=2.0; c.X3=2.0;
        
        assertTrue(a.multiply(2).equals(c));
    }
    
    public void testMultiplyVector()
    {
        Vector3D a=new Vector3D();
        a.X1=1.0; a.X2=1.0; a.X3=1.0;
        Vector3D b=a.clone();

        assertTrue(a.multiply(b)==3);
    }
    
    public void testCrossMultiply()
    {
        Vector3D a=new Vector3D();
        Vector3D b;
        Vector3D c=new Vector3D();

        a.X1=1.0; a.X2=1.0; a.X3=1.0;
        b=a.clone();
        c.X1=0.0; c.X2=0.0; c.X3=0.0;
        assertTrue(a.crossMultiply(b).equals(c));
        a.X1=1.0; a.X2=0.0; a.X3=0.0;
        b.X1=0.0; b.X2=1.0; b.X3=0.0;
        c.X1=0.0; c.X2=0.0; c.X3=1.0;
        assertTrue(a.crossMultiply(b).equals(c));        
    }
    
    public void testAngleTo()
    {
    	Vector3D a=new Vector3D();
    	Vector3D b=new Vector3D();
    	
    	a.clear();
    	a.X1=1.0;
    	b.clear();
    	b.X2=1.0;
    	try {
			assertTrue(a.angleTo(b)==Math.PI/2);
		} catch (Exception e) {
			assertTrue(false);
		}
		b.X2=0.0;
    	try {
			assertFalse(a.angleTo(b)==Math.PI/2); // this line must throw an exception
			assertTrue(false);
		} catch (Exception e) {
			// this exception is wanted, do nothing here
		}
    }
}