LWJGL Forum

Hmm, I am having some weird issues. I grabbed the swt binding from fbi. Added org.lwjgl.opengl.GLCanvas to eclipse. Added org_lwjgl_opengl_GLCanvas.cpp to visual studio. Grabbed newest SWT dll & jar - compile. Success!

Then I made a test app. Failure!

The canvas is getting cleared, so something is working. I just copied from Game.java to my SWTTest. Granted I am a bit tired, but I really can't see whats wrong - anyone?

/*
* Created on Apr 5, 2004
*
* To change the template for this generated file go to Window - Preferences -
* Java - Code Generation - Code and Comments
*/
package org.lwjgl.test;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.KeyListener;
import org.eclipse.swt.events.ShellAdapter;
import org.eclipse.swt.events.ShellEvent;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.lwjgl.Sys;
import org.lwjgl.opengl.GL11;
import org.lwjgl.opengl.GLCanvas;
import org.lwjgl.opengl.GLContext;

/**
* @author Brian
*
* To change the template for this generated type comment go to Window -
* Preferences - Java - Code Generation - Code and Comments
*/
public class SWTTest {
/** Shell instance */
private Shell shell;
 
/** Canvas instance */
private GLCanvas canvas;
 
/** Whether the test is closing */
public boolean closing = false;

 /** A rotating square! */
 private static float  angle;  
 
/**
* Initializes OpenGL
*  
*/
private void initializeOpenGL() {
GL11.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
   
   GL11.glMatrixMode(GL11.GL_PROJECTION);
   GL11.glLoadIdentity();
   GL11.glOrtho(0.0, (double) 640, 0.0, (double) 480, -1.0, 1.0);
   GL11.glMatrixMode(GL11.GL_MODELVIEW);
   GL11.glLoadIdentity();
   GL11.glViewport(0, 0, 640, 480);    
}
/**
* Executes the actual test
*/
public void executeTest() {
initialize();
runTest();
destroy();
}
 
/**
*
*/
private void destroy() {
   shell.dispose();
}
 
/**
*  
*/
private void initialize() {

   shell = new Shell();
shell.setSize(640, 480);

   canvas = new GLCanvas(shell, 0, 0, 0);
canvas.setSize(640, 480);
   
   // install listener
shell.addShellListener(new ShellAdapter() {
public void shellClosed(ShellEvent e) {
closing = true;
}
});

   shell.addKeyListener(new KeyListener() {
public void keyPressed(KeyEvent e) {
}
public void keyReleased(KeyEvent e) {
if (e.keyCode == SWT.ESC) {
closing = true;
}
}
});
}
 
/**
* Runs the test
*/
private void runTest() {
   shell.open();
   Display display = shell.getDisplay();
   canvas.setCurrent();
   GLContext.useContext(canvas);
   
   while (!closing) {
     display.readAndDispatch();
     
     if(shell.isDisposed()) {
      return;
     }

     logic();
     render();
     canvas.paint();
     
     try {
      Thread.sleep(33); // 30 fps
     } catch (InterruptedException ie) {
     }
   }
}  

/**
* Does the "model logic"
*/
private void logic() {
   angle += 1f;
   if (angle > 360.0f) {
     angle = 0.0f;    
   }
}
 
/**
* Render our triangles
*/
private void render() {
   GL11.glClear(GL11.GL_COLOR_BUFFER_BIT);
   
   GL11.glPushMatrix();
     GL11.glTranslatef(canvas.getSize().x, canvas.getSize().y / 2, 0.0f);
     GL11.glRotatef(angle, 0, 0, 1.0f);
     GL11.glBegin(GL11.GL_QUADS);
       GL11.glVertex2i(-50, -50);
       GL11.glVertex2i(50, -50);
       GL11.glVertex2i(50, 50);
       GL11.glVertex2i(-50, 50);
     GL11.glEnd();
   GL11.glPopMatrix();
   
   System.out.println("Render " + Sys.getTime());
}
 
public static void main(String[] args) {
new SWTTest().executeTest();
}
}

That's not so bad as it might seem: you forgot to call your own initializeOpenGL method  :wink:
By the way...I'm sorry for having forgotten once again my code at home (this month I'm in the middle of an house transfer with my fiancé) but tomorrow I will bring it with me...anyway what do you think about the problems with the multiple versions (the thread title is SWT or something like that) ?

Quote from: "fbi"That's not so bad as it might seem: you forgot to call your own initializeOpenGL method  :wink:

DOH! yeah - works fine now - thanks