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1  Java Game APIs & Engines / Java 2D / gage2d multiple layers problem (>2) on: 2003-10-22 14:32:40
Hey,

I'm working on a project using gage2d.  When I add more than 2 layers using a parallax, no error is thrown but the display stops updating.

simplified example:

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import java.awt.Color;
import java.awt.Graphics;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Image;
import java.awt.MediaTracker;
import java.awt.Toolkit;

import javax.swing.JFrame;
import javax.swing.JPanel;

import com.dnsalias.java.gage.map.Map;
import com.dnsalias.java.gage.map.Parallax;
import com.dnsalias.java.gage.map.TileManager;

public class test {
     
      Image tiles[] = new Image[1];
     
      Map map1;
      Map map2;
      Map map3;
     
      Parallax parallax;
     
      JFrame frm;

      public test(){
           
            GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
            GraphicsDevice gd = ge.getDefaultScreenDevice();
            GraphicsConfiguration gc = gd.getDefaultConfiguration();
           
            frm = new JFrame(gc);
                       
            JPanel content = new JPanel();
            content.setLayout(null);
                       
            mPanel mPanel = new mPanel();                        
            mPanel.setBounds(0,0,500,400);            
            content.add(mPanel);      
                       
            frm.setContentPane(content);
            frm.setSize(640,480);
            frm.setTitle("Layer Test");
            frm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);            
            frm.setVisible(true);
      }
     
      public static void main(String[] args) {
            new test();
      }
                       
           
      private class mPanel extends JPanel {
           
            public mPanel(){
                  TileManager manager = new TileManager(64,64);
                 
                  map1 = new Map(manager, 20, 20, 500, 400);
                  map2 = new Map(manager, 20, 20, 500, 400);
                  map3 = new Map(manager, 20, 20, 500, 400);
                 
                 
                  try{
                        tiles[0] = Toolkit.getDefaultToolkit().getImage(test.class.getResource("images/tile1.png"));
                        MediaTracker m = new MediaTracker(frm);
                        m.addImage(tiles[0], 0);
                        m.waitForAll();
                  }catch(Exception e){
                        e.printStackTrace();
                  }
                 
                  int[] ids = new int[tiles.length];
                 
                  for(int i=0; i<tiles.length; i++) ids[i] = manager.addTile(tiles[i]);
                 
                  int mapdata[] = new int[400];
                  int mapdata2[] = new int[400];
                 
                  for (int i = 0; i < mapdata.length; i++){
                        mapdata[i] = 0;
                        mapdata2[i] = 1;
                  }
                 
                  map1.copyMap(mapdata);
                  map2.copyMap(mapdata);
                  map3.copyMap(mapdata2);
                 
            }
           
            public void paint(Graphics g){
                  g.setColor(Color.white);
                 
                  parallax = new Parallax();
                 
                  parallax.addMap(map1);
                  //parallax.addMap(map2);
                 parallax.addMap(map3);
                 
                  parallax.render(g);
                  g.dispose();
            }
      }
                 
}


The above code adds a blank layer on the bottom, and a layer filled with "tile1.png" on top.  

It works perfectly with 2 layers,  but if you remove the comment on the line that says parallax.addMap(map2), nothing is displayed.
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