java.lang.IllegalArgumentException: Drawable already added to animator

[Anton Shterenlikht]

I advanced a step further.

I can compile this JOGL program:

import java.awt.Frame;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.media.opengl.*;
import javax.media.opengl.awt.GLCanvas;
import com.jogamp.opengl.util.*;

public class SimpleScene implements GLEventListener {

    private double theta = 0;
    private double s = 0;
    private double c = 0;

    public static void main(String[] args) {
        GLProfile glp = GLProfile.getDefault();
        GLCapabilities caps = new GLCapabilities(glp);
        GLCanvas canvas = new GLCanvas(caps);

        Frame frame = new Frame("AWT Window Test");
        frame.setSize(300, 300);
        frame.add(canvas);
        frame.setVisible(true);

        frame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });

        canvas.addGLEventListener(new SimpleScene());

        FPSAnimator animator = new FPSAnimator(canvas, 60);
        animator.add(canvas);
        animator.start();
    }

    @Override
    public void display(GLAutoDrawable drawable) {
        update();
        render(drawable);
    }

    @Override
    public void dispose(GLAutoDrawable drawable) {
    }

    @Override
    public void init(GLAutoDrawable drawable) {
    }

    @Override
    public void reshape(GLAutoDrawable drawable, int x, int y, int w, int h) {
    }

    private void update() {
        theta += 0.01;
        s = Math.sin(theta);
        c = Math.cos(theta);
    }

    private void render(GLAutoDrawable drawable) {
        GL2 gl = drawable.getGL().getGL2();

        gl.glClear(GL.GL_COLOR_BUFFER_BIT);

        // draw a triangle filling the window
        gl.glBegin(GL.GL_TRIANGLES);
        gl.glColor3f(1, 0, 0);
        gl.glVertex2d(-c, -c);
        gl.glColor3f(0, 1, 0);
        gl.glVertex2d(0, c);
        gl.glColor3f(0, 0, 1);
        gl.glVertex2d(s, -s);
        gl.glEnd();
    }
}

with

$ javac SimpleScene.java
warning: Supported source version 'RELEASE_6' from annotation processor 'com.jogamp.gluegen.structgen.CStructAnnotationProcessor' less than -source '1.8'
1 warning

but when I run it, I get this error:

$ java SimpleScene
Exception in thread "main" java.lang.IllegalArgumentException: Drawable already added to animator: com.jogamp.opengl.util.FPSAnimator[started false, animating false, paused false, drawable 1, totals[dt 0, frames 0, fps 0.0], modeBits 1, init'ed true, animThread null, exclCtxThread false(null)], AWT-GLCanvas[Realized false,
        jogamp.opengl.x11.glx.X11OnscreenGLXDrawable,
        Factory   jogamp.opengl.x11.glx.X11GLXDrawableFactory at 91161c7,
        handle    0x2600020,
        Drawable size 286x269 surface[286x269],
        AWT[pos 7/24, size 286x269,
        visible true, displayable true, showing true,
        AWTGraphicsConfiguration[AWTGraphicsScreen[AWTGraphicsDevice[type .awt, connection :0.0, unitID 0, awtDevice X11GraphicsDevice[screen=0], handle 0x0], idx 0],
        chosen    GLCaps[glx vid 0xba, fbc 0x81: rgba 8/8/8/0, opaque, accum-rgba 0/0/0/0, dp/st/ms 24/8/0, dbl, mono  , hw, GLProfile[GL2/GL2.hw], on-scr[.]],
        requested GLCaps[rgba 8/8/8/0, opaque, accum-rgba 0/0/0/0, dp/st/ms 16/0/0, dbl, mono  , hw, GLProfile[GL2/GL2.hw], on-scr[.]],
        X11GraphicsConfig[dev=X11GraphicsDevice[screen=0],vis=0xba],
        encapsulated X11GLXGraphicsConfiguration[X11GraphicsScreen[X11GraphicsDevice[type .x11, connection :0.0, unitID 0, handle 0x8d73fd800, owner true, JAWTToolkitLock[obj 0x604ed9f0, isOwner false, <6a4f787b, 685cb137>[count 0, qsz 0, owner <NULL>]]], idx 0], visualID 0xba, fbConfigID 0x81,
        requested GLCaps[rgba 8/8/8/0, opaque, accum-rgba 0/0/0/0, dp/st/ms 16/0/0, dbl, mono  , hw, GLProfile[GL2/GL2.hw], on-scr[.]],
        chosen    GLCaps[glx vid 0xba, fbc 0x81: rgba 8/8/8/0, opaque, accum-rgba 0/0/0/0, dp/st/ms 24/8/0, dbl, mono  , hw, GLProfile[GL2/GL2.hw], on-scr[.]]]]]]
        at com.jogamp.opengl.util.AnimatorBase.add(AnimatorBase.java:201)
        at SimpleScene.main(SimpleScene.java:33)

Anything obvious?

Thanks

Anton