Exception using VBOs

elect · February 3, 2012, 6:36am

Hi guys,

I had my program working with VBOs, but then I had to change the general structure, create additional classes and make everything cleaner, ect…

But when I finished it was not working any more…

Here the basic:

public class Test extends javax.swing.JFrame {

private Viewer viewer=null;
ArrayList&lt;Triangle&gt; sectionPointsArray;
ArrayList&lt;LightBulb&gt; lightBulbs = new ArrayList&lt;LightBulb&gt;();
ArrayList&lt;Plane&gt; planes = new ArrayList&lt;Plane&gt;();

public Test() {
    initComponents();
    
    DataModelViewer.testclass = this;
    
    this.setSize(800, 800);
    viewer = new Viewer();
    DataModelViewer.viewer = viewer;
  
    this.getContentPane().add(viewer,BorderLayout.CENTER);
   
}

/**
 * This method is called from within the constructor to initialize the form.
 * WARNING: Do NOT modify this code. The content of this method is always
 * regenerated by the Form Editor.
 */
@SuppressWarnings("unchecked")
// &lt;editor-fold defaultstate="collapsed" desc="Generated Code"&gt;                          
private void initComponents() {

    fileChooser = new javax.swing.JFileChooser();
    jMenuBar1 = new javax.swing.JMenuBar();
    jMenu1 = new javax.swing.JMenu();
    button_load = new javax.swing.JMenuItem();
    button_calc = new javax.swing.JMenuItem();
    button_exit = new javax.swing.JMenuItem();

    fileChooser.setDialogTitle("Choose a stl file..");
    fileChooser.setFileFilter(new StlFilter());

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

    jMenu1.setText("Process");

    button_load.setText("Load Model");
    button_load.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            button_loadActionPerformed(evt);
        }
    });
    jMenu1.add(button_load);

    button_calc.setText("Calculate");
    button_calc.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            button_calcActionPerformed(evt);
        }
    });
    jMenu1.add(button_calc);

    button_exit.setText("Exit");
    button_exit.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            button_exitActionPerformed(evt);
        }
    });
    jMenu1.add(button_exit);

    jMenuBar1.add(jMenu1);

    setJMenuBar(jMenuBar1);

    pack();
}// &lt;/editor-fold&gt;

private void button_loadActionPerformed(java.awt.event.ActionEvent evt) {                                            
    int returnVal = fileChooser.showOpenDialog(this);
    if (returnVal == JFileChooser.APPROVE_OPTION) {
        File file = fileChooser.getSelectedFile();
        System.out.println(file.getAbsolutePath());
         System.out.println("Loading model.");
        LoadSTL loadSTL = new LoadSTL(file, DataModelViewer.array);
       System.out.println("Loading model finished.");
        viewer.loadModel(DataModelViewer.gl);
        
    } 
    else {
        System.out.println("File access cancelled by user.");
    }
}

}

public class Viewer extends JPanel implements GLEventListener, MouseListener,
MouseMotionListener, MouseWheelListener, KeyListener {
public Viewer () {

   // this.frame=frame;
    initDisplay();
    initFlags();
    
    //fPSAnimator = new FPSAnimator(gLCanvas, frameRate);                
    
    //JoglEventListener listener = new JoglEventListener(canvas); 
    
}

private void initDisplay() {
    
    glProfile = GLProfile.get(GLProfile.GL2);
    final GLCapabilities glCapabilities = new GLCapabilities(glProfile);
            
     // Initialize the GL component
    GLCanvas glComponent = new GLCanvas(glCapabilities);
    this.gLCanvas = glComponent;
    
    this.setLayout(new BorderLayout());
    gLCanvas.setPreferredSize(new Dimension(this.getWidth(),this.getHeight()));
    gLCanvas.setBackground(Color.RED);
    this.add(gLCanvas, BorderLayout.CENTER);
    gLCanvas.requestFocus();
       
    //glComponent.addGLEventListener(this);
    gLCanvas.addGLEventListener(this);
    gLCanvas.addMouseListener(this);
    gLCanvas.addMouseMotionListener(this);
    gLCanvas.addMouseWheelListener(this);
    gLCanvas.addKeyListener(this);	
}

@Override
public void init(GLAutoDrawable gLAutoDrawable) {
System.out.println(“Init”);

    currentRotation = identity();

    // Create and start the animator
    animator = new Animator(gLCanvas);
    //animator.setRunAsFastAsPossible(true);
    animator.start();

    // Perform the default GL initialization 
    GL2 gl = gLAutoDrawable.getGL().getGL2();
    DataModelViewer.gl = gl;
    
    loadFloorTexture(gl);
    
    
    gl.glClear(GL2.GL_COLOR_BUFFER_BIT);
    //gl.glClearColorIi(1, 10, 100, 1);  // set background color
    gl.glClearColor(0.17f, 0.65f, 0.92f, 0.0f); // light blue
// gl.glEnable(GL2.GL_DEPTH_TEST); // depth test for z-test
// gl.glEnable(GL2.GL_LIGHTING); // enable lighting
// gl.glEnable(GL2.GL_LIGHT0); // set light from viewer
//gl.glShadeModel(GL2.GL_SMOOTH); // use smooth shading
//gl.glMatrixMode(GL2.GL_MODELVIEW);

    //gl.glEnable(GL2.GL_COLOR_MATERIAL);        
    //gl.glColorMaterial(GL2.GL_FRONT, GL2.GL_DIFFUSE);
}

@Override
public void display(GLAutoDrawable gLAutoDrawable) {
//System.out.println(“Display”);
    GL2 gl = gLAutoDrawable.getGL().getGL2();
    
    if ( switchableFlags.get("lighting").getFlag() )
        gl.glEnable(GL2.GL_LIGHTING);
else
gl.glDisable(GL2.GL_LIGHTING);
    if ( switchableFlags.get("smoothing").getFlag() ) 
        gl.glShadeModel(GL2.GL_SMOOTH);
else
gl.glShadeModel(GL2.GL_FLAT);

    if ( switchableFlags.get("color").getFlag() ) 
        gl.glEnable(GL2.GL_COLOR_MATERIAL);

else
gl.glDisable(GL2.GL_COLOR_MATERIAL);

    //  set modelview Matrix
    gl.glMatrixMode(GL2.GL_MODELVIEW);
    
    // clear color and depth buffers (faster than doing separately)
    gl.glClear(GL2.GL_COLOR_BUFFER_BIT | GL2.GL_DEPTH_BUFFER_BIT);
    
    gl.glLoadIdentity();
    
    //gl.glMultMatrixf(modelviewMatrix, 0);
    gl.glMultMatrixf(currentRotation, 0);
    
  
    gl.glTranslatef((float)translationX/20.0f, (float)translationY/20.0f, 0);
    gl.glScalef(scale%10.0f, scale%10.0f, scale%10.0f);
   
    gl.glMatrixMode(GL2.GL_PROJECTION);
    
    if(isThereModel)    {
        gl.glEnableClientState(GL2.GL_VERTEX_ARRAY);
        
        //  select buffer and specify its format
        gl.glBindBuffer(GL2.GL_ARRAY_BUFFER, VBO[0]);
        gl.glVertexPointer(3, GL2.GL_FLOAT, 0, 0);
        //gl.glVertexPointer(3, GL2.GL_FLOAT, 0, vertexData);

// gl.glBindBuffer(GL2.GL_ARRAY_BUFFER, normalPointBufferID);
// gl.glNormalPointer(GL2.GL_FLOAT, 0, 0);

// gl.glEnableClientState(GL2.GL_VERTEX_ARRAY);
// gl.glEnableClientState(GL2.GL_NORMAL_ARRAY);

        gl.glColor3f(0.0f, 0.0f, 0.0f);

//

        gl.glDrawArrays(GL2.GL_TRIANGLES, 0, triangleNumber*3);

        gl.glDisableClientState(GL2.GL_VERTEX_ARRAY);
// gl.glDisable(GL2.GL_NORMAL_ARRAY);
}
gl.glBindBuffer(GL2.GL_ARRAY_BUFFER, 0);
    renderLightSource(gl);
    
    drawFloor(gl);
}

private void initVertexArray(GL2 gl) {
gl.glEnableClientState(GL2.GL_VERTEX_ARRAY);

  gl.glBindBuffer(GL2.GL_ARRAY_BUFFER, VBO[0]);
  
  gl.glBufferData(GL2.GL_ARRAY_BUFFER, triangleNumber*3*3, vertexData, GL2.GL_STATIC_DRAW);
  
  gl.glDisableClientState(GL2.GL_VERTEX_ARRAY);

}

And this is the error I get:

Exception in thread “AWT-EventQueue-0-AWTAnimator-1” javax.media.opengl.GLException: javax.media.opengl.GLException: array vertex_buffer_object must be enabled to call this method
at jogamp.opengl.awt.AWTThreadingPlugin.invokeOnOpenGLThread(AWTThreadingPlugin.java:98)
at jogamp.opengl.ThreadingImpl.invokeOnOpenGLThread(ThreadingImpl.java:197)
at javax.media.opengl.Threading.invokeOnOpenGLThread(Threading.java:164)
at javax.media.opengl.awt.GLCanvas.maybeDoSingleThreadedWorkaround(GLCanvas.java:830)
at javax.media.opengl.awt.GLCanvas.display(GLCanvas.java:419)
at com.jogamp.opengl.util.AWTAnimatorImpl.display(AWTAnimatorImpl.java:74)
at com.jogamp.opengl.util.AnimatorBase.display(AnimatorBase.java:142)
at com.jogamp.opengl.util.Animator$MainLoop.run(Animator.java:176)
at java.lang.Thread.run(Thread.java:722)
Caused by: javax.media.opengl.GLException: array vertex_buffer_object must be enabled to call this method
at jogamp.opengl.gl4.GL4bcImpl.checkBufferObject(GL4bcImpl.java:32025)
at jogamp.opengl.gl4.GL4bcImpl.checkArrayVBOEnabled(GL4bcImpl.java:32052)
at jogamp.opengl.gl4.GL4bcImpl.glVertexPointer(GL4bcImpl.java:31004)
at cuda.Viewer.display(Viewer.java:333)
at jogamp.opengl.GLDrawableHelper.displayImpl(GLDrawableHelper.java:182)
at jogamp.opengl.GLDrawableHelper.display(GLDrawableHelper.java:170)
at javax.media.opengl.awt.GLCanvas$DisplayAction.run(GLCanvas.java:939)
at jogamp.opengl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:398)
at javax.media.opengl.awt.GLCanvas$DisplayOnEventDispatchThreadAction.run(GLCanvas.java:956)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:241)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:705)
at java.awt.EventQueue.access$000(EventQueue.java:101)
at java.awt.EventQueue$3.run(EventQueue.java:666)
at java.awt.EventQueue$3.run(EventQueue.java:664)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:675)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:211)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

carsten_neumann · February 3, 2012, 8:26am

Please use [ code]/[ /code] around source snippets so that they use a fixed width font. It also helps readability if you remove commented out parts

I don’t see a call to glGenBuffers().

elect · February 5, 2012, 11:36pm

Yeah sure, sorry but I was a little in a rush

Ok, I used the code tags, removed the commented parts out and added a glGebBuffers, but I still get an error

public class Test extends javax.swing.JFrame {

    private Viewer viewer=null;
    ArrayList<Triangle> sectionPointsArray;
    ArrayList<LightBulb> lightBulbs = new ArrayList<LightBulb>();
    ArrayList<Plane> planes = new ArrayList<Plane>();
   
    public Test() {
        initComponents();
        
        DataModelViewer.testclass = this;
        
        this.setSize(800, 800);
        viewer = new Viewer();
        DataModelViewer.viewer = viewer;
      
        this.getContentPane().add(viewer,BorderLayout.CENTER);
       
    }
                    
    private void initComponents() {

        fileChooser = new javax.swing.JFileChooser();
        jMenuBar1 = new javax.swing.JMenuBar();
        jMenu1 = new javax.swing.JMenu();
        button_load = new javax.swing.JMenuItem();
        button_calc = new javax.swing.JMenuItem();
        button_exit = new javax.swing.JMenuItem();

        fileChooser.setDialogTitle("Choose a stl file..");
        fileChooser.setFileFilter(new StlFilter());

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jMenu1.setText("Process");

        button_load.setText("Load Model");
        button_load.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                button_loadActionPerformed(evt);
            }
        });
        jMenu1.add(button_load);

        button_calc.setText("Calculate");
        button_calc.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                button_calcActionPerformed(evt);
            }
        });
        jMenu1.add(button_calc);

        button_exit.setText("Exit");
        button_exit.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                button_exitActionPerformed(evt);
            }
        });
        jMenu1.add(button_exit);

        jMenuBar1.add(jMenu1);

        setJMenuBar(jMenuBar1);

        pack();
    }                    

    private void button_loadActionPerformed(java.awt.event.ActionEvent evt) {                                            
        int returnVal = fileChooser.showOpenDialog(this);
        if (returnVal == JFileChooser.APPROVE_OPTION) {
            File file = fileChooser.getSelectedFile();
            System.out.println(file.getAbsolutePath());
             System.out.println("Loading model.");
            LoadSTL loadSTL = new LoadSTL(file, DataModelViewer.array);
           System.out.println("Loading model finished.");
            viewer.loadModel(DataModelViewer.gl);
            
        } 
        else {
            System.out.println("File access cancelled by user.");
        }
    }      
}

public class Viewer extends JPanel implements GLEventListener, MouseListener, 
                            MouseMotionListener, MouseWheelListener, KeyListener {

int nbVBO = 1;
    int[] VBO = new int[nbVBO];

public Viewer ()   {
        
        initDisplay();
        initFlags();
    }
    
    private void initDisplay() {
        
        glProfile = GLProfile.get(GLProfile.GL2);
        final GLCapabilities glCapabilities = new GLCapabilities(glProfile);
                
         // Initialize the GL component
        GLCanvas glComponent = new GLCanvas(glCapabilities);
        this.gLCanvas = glComponent;
        
        this.setLayout(new BorderLayout());
        gLCanvas.setPreferredSize(new Dimension(this.getWidth(),this.getHeight()));
        gLCanvas.setBackground(Color.RED);
        this.add(gLCanvas, BorderLayout.CENTER);
        gLCanvas.requestFocus();
           
        gLCanvas.addGLEventListener(this);
        gLCanvas.addMouseListener(this);
        gLCanvas.addMouseMotionListener(this);
        gLCanvas.addMouseWheelListener(this);
        gLCanvas.addKeyListener(this);	
    }

 @Override
    public void init(GLAutoDrawable gLAutoDrawable) {
        System.out.println("Init");

        currentRotation = identity();

        // Create and start the animator
        animator = new Animator(gLCanvas);
        //animator.setRunAsFastAsPossible(true);
        animator.start();

        // Perform the default GL initialization 
        GL2 gl = gLAutoDrawable.getGL().getGL2();
        DataModelViewer.gl = gl;
        
        loadFloorTexture(gl);
        
        
        gl.glClear(GL2.GL_COLOR_BUFFER_BIT);
        
        gl.glClearColor(0.17f, 0.65f, 0.92f, 0.0f); // light blue 
    }

@Override
    public void display(GLAutoDrawable gLAutoDrawable) {
        
        GL2 gl = gLAutoDrawable.getGL().getGL2();
        
        if ( switchableFlags.get("lighting").getFlag() )
            gl.glEnable(GL2.GL_LIGHTING);
	else 
            gl.glDisable(GL2.GL_LIGHTING);
	
        if ( switchableFlags.get("smoothing").getFlag() ) 
            gl.glShadeModel(GL2.GL_SMOOTH);
	else 
            gl.glShadeModel(GL2.GL_FLAT);	

        if ( switchableFlags.get("color").getFlag() ) 
            gl.glEnable(GL2.GL_COLOR_MATERIAL);
	else 
            gl.glDisable(GL2.GL_COLOR_MATERIAL);
	
        //  set modelview Matrix
        gl.glMatrixMode(GL2.GL_MODELVIEW);
        
        // clear color and depth buffers (faster than doing separately)
        gl.glClear(GL2.GL_COLOR_BUFFER_BIT | GL2.GL_DEPTH_BUFFER_BIT);
        
        gl.glLoadIdentity();
        
        gl.glMultMatrixf(currentRotation, 0);
              
        gl.glTranslatef((float)translationX/20.0f, (float)translationY/20.0f, 0);
        gl.glScalef(scale%10.0f, scale%10.0f, scale%10.0f);
       
        gl.glMatrixMode(GL2.GL_PROJECTION);
        
        if(isThereModel)    {
            gl.glEnableClientState(GL2.GL_VERTEX_ARRAY);
            
            //  select buffer and specify its format
            gl.glBindBuffer(GL2.GL_ARRAY_BUFFER, VBO[0]);
            gl.glVertexPointer(3, GL2.GL_FLOAT, 0, 0);

            gl.glColor3f(0.0f, 0.0f, 0.0f);

            gl.glDrawArrays(GL2.GL_TRIANGLES, 0, triangleNumber*3);

            gl.glDisableClientState(GL2.GL_VERTEX_ARRAY);
        }
gl.glBindBuffer(GL2.GL_ARRAY_BUFFER, 0);
        
        renderLightSource(gl);
        
        drawFloor(gl);
}

 private void initVertexArray(GL2 gl)    {
gl.glEnableClientState(GL2.GL_VERTEX_ARRAY);
      
      gl.glGenBuffers(1, VBO, 0);

      gl.glBindBuffer(GL2.GL_ARRAY_BUFFER, VBO[0]);
      
      gl.glBufferData(GL2.GL_ARRAY_BUFFER, triangleNumber*3*3, vertexData, GL2.GL_STATIC_DRAW);
      
      gl.glDisableClientState(GL2.GL_VERTEX_ARRAY);
}

And this is still the error I get:

Exception in thread “AWT-EventQueue-0-AWTAnimator-1” javax.media.opengl.GLException: javax.media.opengl.GLException: array vertex_buffer_object must be enabled to call this method
at jogamp.opengl.awt.AWTThreadingPlugin.invokeOnOpenGLThread(AWTThreadingPlugin.java:98)
at jogamp.opengl.ThreadingImpl.invokeOnOpenGLThread(ThreadingImpl.java:197)
at javax.media.opengl.Threading.invokeOnOpenGLThread(Threading.java:164)
at javax.media.opengl.awt.GLCanvas.maybeDoSingleThreadedWorkaround(GLCanvas.java:830)
at javax.media.opengl.awt.GLCanvas.display(GLCanvas.java:419)
at com.jogamp.opengl.util.AWTAnimatorImpl.display(AWTAnimatorImpl.java:74)
at com.jogamp.opengl.util.AnimatorBase.display(AnimatorBase.java:142)
at com.jogamp.opengl.util.Animator$MainLoop.run(Animator.java:176)
at java.lang.Thread.run(Thread.java:722)
Caused by: javax.media.opengl.GLException: array vertex_buffer_object must be enabled to call this method
at jogamp.opengl.gl4.GL4bcImpl.checkBufferObject(GL4bcImpl.java:32025)
at jogamp.opengl.gl4.GL4bcImpl.checkArrayVBOEnabled(GL4bcImpl.java:32052)
at jogamp.opengl.gl4.GL4bcImpl.glVertexPointer(GL4bcImpl.java:31004)
at cuda.Viewer.display(Viewer.java:333)
at jogamp.opengl.GLDrawableHelper.displayImpl(GLDrawableHelper.java:182)
at jogamp.opengl.GLDrawableHelper.display(GLDrawableHelper.java:170)
at javax.media.opengl.awt.GLCanvas$DisplayAction.run(GLCanvas.java:939)
at jogamp.opengl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:398)
at javax.media.opengl.awt.GLCanvas$DisplayOnEventDispatchThreadAction.run(GLCanvas.java:956)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:241)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:705)
at java.awt.EventQueue.access$000(EventQueue.java:101)
at java.awt.EventQueue$3.run(EventQueue.java:666)
at java.awt.EventQueue$3.run(EventQueue.java:664)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:675)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:211)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

My specs are: Win7 64bit, 4gb, 560 Ti (285.62)
The code is JOGL in Netbeans. I am using OpenGL 2.0.

elect · February 6, 2012, 1:13am

Can I safely declare the gl as public variable instead passing it to each function that needs it?

elect · February 6, 2012, 2:36am

It is funny, look, I modified the following:

private void initVertexArray()    {
      
      vertexData = GLBuffers.newDirectFloatBuffer(9);
      vertexData.put(new float[]{0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f});
      vertexData.flip();
      
      gl.glGenBuffers(1, VBO, 0);
      
      gl.glEnableClientState(GL2.GL_VERTEX_ARRAY);
            
      gl.glBindBuffer(GL2.GL_ARRAY_BUFFER, VBO[0]);
      
      gl.glBufferData(GL2.GL_ARRAY_BUFFER, 36, vertexData, GL2.GL_STATIC_DRAW);
      
      gl.glDisableClientState(GL2.GL_VERTEX_ARRAY);
      
      gl.glBindBuffer(GL2.GL_ARRAY_BUFFER, 0);
    }

If I call the initVertexArray from the init(), no problem, the triangle get rendered.

But if I call it when the user performs some action, then I get the exception…

O_o

elect · February 6, 2012, 5:21am

I managed to make it work, I moved the initVertexArray() call into the display():

if(initialize) {
            initVertexArray();
            initialize = false;
        }

In this way the call takes place within the same class

I ended up that the error was because I was calling

public void loadModel() {
        
        System.out.println("BLA1");
        initVertexArray();
        System.out.println("BLA2");
        //initNormalArray();
        
        isThereModel = true;
    }

from another class (but I am pretty sure always within the same thread