bprocessor-commit

[rimestad <rim...@us...>]

Update of /cvsroot/bprocessor/model/src/net/sourceforge/bprocessor/model/test
In directory sc8-pr-cvs3.sourceforge.net:/tmp/cvs-serv24444/src/net/sourceforge/bprocessor/model/test

Added Files:
	MatrixTest.java 
Log Message:
added invert on matrix and made a small but for now useless test of it

--- NEW FILE: MatrixTest.java ---
//---------------------------------------------------------------------------------
// $Id: MatrixTest.java,v 1.1 2007/11/26 18:09:08 rimestad Exp $
//
// Copyright (c) 2005      The BProcessor Team (http://bprocessor.sourceforge.net) 
// Released under the Lesser GNU Public License v2.1
//---------------------------------------------------------------------------------
package net.sourceforge.bprocessor.model.test;

import net.sourceforge.bprocessor.model.Matrix;
import junit.framework.TestCase;

/**
 * The vertex test class
 */
public class MatrixTest extends TestCase {
  /**
   * Test method for 'net.sourceforge.bprocessor.model.Matrix.inverse()'
   */
  public void testInverse() {
    Matrix m = new Matrix(new double[]{
      1, 0, 0, 0,
      0, 1, 0, 0,
      0, 0, 1, 0,
      0, 0, 0, 1});
    Matrix inv = m.invert();
    assertTrue(inv.equals(m));
    assertEquals(m.determinant(), 1, 0.00000001);

    m = new Matrix(new double[]{
      0, 1, 0, 0,
      1, 0, 0, 0,
      0, 0, 1, 0,
      6, 5, 2, 1});

    inv = m.invert();
    Matrix result = new Matrix(new double[]{
      0, 1, 0, 0,
      1, 0, 0, 0,
      0, 0, 1, 0,
      -5, -6, -2, 1});
    assertTrue(inv.equals(result));
  }
}