Torus Example in ViewPart

[kappolo]

Hey Guys. I'm new here and I'm new to the LWJGL world.
I'm developing an Eclipse plug-in for 3D Software Visualization.
I've decided to move to LWJGL because of several reasons.

I've used a slightly different version of http://www.java2s.com/Code/Java/SWT-JFace-Eclipse/drawarotatingtorususingtheLWJGLOpenGLbinding.htm in order to test if everything works.
I'm on PPC MacOSX 10.5.2 with Eclipse 3.3

But when running it I see the following error

2008-05-01 10:46:29.151 java[4490:10b] [Java CocoaComponent compatibility mode]: Enabled
2008-05-01 10:46:29.156 java[4490:10b] [Java CocoaComponent compatibility mode]: Setting timeout for SWT to 0.100000

and I see only the blue background without the "Torus".

Can please anyone help me getting started with LWJGL?

THANKS A LOT

My code:

package org.speriamo.funziona.views;



import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.ui.part.*;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.opengl.GLCanvas;
import org.eclipse.swt.opengl.GLData;
import org.eclipse.swt.SWT;

import org.lwjgl.LWJGLException;
import org.lwjgl.opengl.GL11;
import org.lwjgl.opengl.GLContext;
import org.lwjgl.util.glu.GLU;


public class Dio extends ViewPart {
	
	public Dio() {
	}

	
	public void createPartControl(Composite parent) {
		parent.setLayout(new FillLayout());
		GLData data = new GLData();
		data.doubleBuffer = true;
		final GLCanvas canvas = new GLCanvas(parent, SWT.NONE, data);
		canvas.setCurrent();
		try {
			GLContext.useContext(canvas);
		} catch (LWJGLException e) {
			e.printStackTrace();
		}
		canvas.addListener(SWT.RESIZE, new Listener(){

			public void handleEvent(Event event) {
				Rectangle bounds = canvas.getBounds();
		        float fAspect = (float) bounds.width / (float) bounds.height;
		        canvas.setCurrent();
		        try {
		          GLContext.useContext(canvas);
		        } catch(LWJGLException e) { e.printStackTrace(); }
		        GL11.glViewport(0, 0, bounds.width, bounds.height);
		        GL11.glMatrixMode(GL11.GL_PROJECTION);
		        GL11.glLoadIdentity();
		        GLU.gluPerspective(45.0f, fAspect, 0.5f, 400.0f);
		        GL11.glMatrixMode(GL11.GL_MODELVIEW);
		        GL11.glLoadIdentity();
				
			}
			
		});
		GL11.glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
	    GL11.glColor3f(1.0f, 0.0f, 0.0f);
	    GL11.glHint(GL11.GL_PERSPECTIVE_CORRECTION_HINT, GL11.GL_NICEST);
	    GL11.glClearDepth(1.0);
	    GL11.glLineWidth(2);
	    GL11.glEnable(GL11.GL_DEPTH_TEST);
	    
	    new Runnable() {
	    	int rot = 0;
	        public void run() {
	          if (!canvas.isDisposed()) {
	            canvas.setCurrent();
	            try {
	              GLContext.useContext(canvas);
	            } catch(LWJGLException e) { e.printStackTrace(); }
	            GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);
	            GL11.glClearColor(.3f, .5f, .8f, 1.0f);
	            GL11.glLoadIdentity();
	            GL11.glTranslatef(0.0f, 0.0f, -10.0f);
	            float frot = rot;
	            GL11.glRotatef(0.15f * rot, 2.0f * frot, 10.0f * frot, 1.0f);
	            GL11.glRotatef(0.3f * rot, 3.0f * frot, 1.0f * frot, 1.0f);
	            rot++;
	            GL11.glPolygonMode(GL11.GL_FRONT_AND_BACK, GL11.GL_LINE);
	            GL11.glColor3f(0.9f, 0.9f, 0.9f);
	            drawTorus(1, 1.9f + ((float) Math.sin((0.004f * frot))), 15, 15);
	            canvas.swapBuffers();
	            canvas.getDisplay().timerExec(50, this);
	          }
	        }
		}.run();
	}


	static void drawTorus(float r, float R, int nsides, int rings) {
	    float ringDelta = 2.0f * (float) Math.PI / rings;
	    float sideDelta = 2.0f * (float) Math.PI / nsides;
	    float theta = 0.0f, cosTheta = 1.0f, sinTheta = 0.0f;
	    for (int i = rings - 1; i >= 0; i--) {
	      float theta1 = theta + ringDelta;
	      float cosTheta1 = (float) Math.cos(theta1);
	      float sinTheta1 = (float) Math.sin(theta1);
	      GL11.glBegin(GL11.GL_QUAD_STRIP);
	      float phi = 0.0f;
	      for (int j = nsides; j >= 0; j--) {
	        phi += sideDelta;
	        float cosPhi = (float) Math.cos(phi);
	        float sinPhi = (float) Math.sin(phi);
	        float dist = R + r * cosPhi;
	        GL11.glNormal3f(cosTheta1 * cosPhi, -sinTheta1 * cosPhi, sinPhi);
	        GL11.glVertex3f(cosTheta1 * dist, -sinTheta1 * dist, r * sinPhi);
	        GL11.glNormal3f(cosTheta * cosPhi, -sinTheta * cosPhi, sinPhi);
	        GL11.glVertex3f(cosTheta * dist, -sinTheta * dist, r * sinPhi);
	      }
	      GL11.glEnd();
	      theta = theta1;
	      cosTheta = cosTheta1;
	      sinTheta = sinTheta1;
	    }
	  }

	public void setFocus() {
		
	}
}