/*
 *  File:  QuadrilateralTest.java
 *
 *  Drawing quadrilaterals
 *
 *  Copyright:  Northeast Parallel Architectures Center
 *  
 */

import java.applet.Applet;
import java.awt.Graphics;
import java.awt.Polygon;

public class QuadrilateralTest extends Applet {

   // create references to two polygons:
   private Polygon p1, p2;
   
   public void init() {

      // instantiate a Polygon object:
      p1 = new Polygon();
      
      // add points to make a rectangle (a kind of quadrilateral):
      p1.addPoint(  25,  25 );
      p1.addPoint( 125,  25 );
      p1.addPoint( 125,  75 );
      p1.addPoint(  25,  75 );

      // instantiate a Polygon object:
      p2 = new Polygon();

      // add points to make a parallelogram (another kind of quadrilateral):
      p2.addPoint( 165,  25 );
      p2.addPoint( 265,  25 );
      p2.addPoint( 250,  75 );
      p2.addPoint( 150,  75 );


//       // Here's another way to do it:
//
//       // vertices of a rectangle (a kind of quadrilateral):
//       int xValues1[] = {  25, 125, 125,  25 };
//       int yValues1[] = {  25,  25,  75,  75 };
// 
//       // vertices of a parallelogram (another kind of quadrilateral):
//       int xValues2[] = { 165, 265, 250, 150 };
//       int yValues2[] = {  25,  25,  75,  75 };
// 
//       // instantiate the rectangle:
//       p1 = new Polygon( xValues1, yValues1, 4 );
//       
//       // instantiate the parallelogram:
//       p2 = new Polygon( xValues2, yValues2, 4 );

   }
   
   public void paint( Graphics g ) {

      // draw the rectangle:
      g.drawPolygon( p1 );

      // draw the parallelogram:
      g.fillPolygon( p2 );

   }
   
}