content: package edu.stanford.rsl.tutorial.phantoms;
  
  /**
   * Simple class to show the Grid2D functionality. We use a Grid2D to create a uniform circle.
   * We use this as a first phantom to investigate parallel beam projection and back-projection.
   * 
   * @author Recopra Summer Semester 2012
   *
   */
  public class TestObject2 extends Phantom {
  
  	/**
  	 * The constructor takes two arguments to initialize the grid. The circle will be in the center and have a radius of 45% of the x-dimension.
  	 * Thus we recommend a grid size that is uniform in both directions.
  	 * @param x
  	 * @param y
  	 */
  	public TestObject2 (int x, int y){
  		super(x,y,"TestObject2");
  		
  		
  
  		// Create circle in the grid.
  		double radius = 0.2*x;
  		int xcenter = 1*x/4;
  		int ycenter = 3*x/4;
  		float val = 1.f;
  		
  		for(int i = 0; i<x; i++) {
  			for(int j = 0; j<y; j++) {
  				if( Math.pow(i - xcenter, 2)  + Math.pow(j - ycenter, 2) <= (radius*radius) ) {
  					super.setAtIndex(i, j, val);
  				}	
  			}
  		}
  		
  		
  	}
  	
  }
  /*
   * Copyright (C) 2010-2014 Andreas Maier
   * CONRAD is developed as an Open Source project under the GNU General Public License (GPL).
  */