Multiple GLJPanels in one JFrame

Hi. I'm currently developing one application, which should be able to run in stereomode. Due to my stereo setup - I need to draw same scene into two GLJPanels & apply some manipulation, which makes the stereoscopy work.

But I have a problem with placing two GLJPanels into one JFrame. They both share the same OpenGlListener. I also know, that when I put just one of these (either left or right) GLJPanel into that JFrame - everything works as I want to. But when I add two GLJPanels into JFrame (using FlowLayout), I instantly recieve javax.media.opengl.GLException: element vertex_buffer_object must be enabled to call this method.

I just want to ask - where could be the problem if I add two GLJPanels to one JFrame & get the VBO must be enabled exeption & when I put just one of these panels into JFrame - everyhing works as I want it to. I'm really lost in this...

Hi

Use 2 instances of GLEventListener but use shared OpenGL contexts to make it work.

Yeah,
I tried this too, but the result was the same. So I thought this is not the problem...Even when I used two GlEventListenrs - I had the same VBO problem...

but you don't use shared contexts, do you?

Nope. Should I? Never heard abouth them to be honest...

Actually you would need to use shared contexts to share the data between 2 panels but you don't need 2 panels to use the stereo mode, this is not the right way of implementing it. You can use a single panel (you can put a plain GLCanvas into a JPanel instead of using GLJPanel) and draw you scene twice with different buffers (see glDrawBuffer, GL_BACK_RIGHT and GL_BACK_LEFT) and different model-view matrices. You can use the famous method called "parallel axis asymmetric frustum perspective projection". Good luck.