Posted by HamudHaa on Jan 20, 2024; 1:09pm
URL: https://forum.jogamp.org/Rendering-outside-EventListener-and-program-fell-into-dead-loop-tp4043262.html

As a beginner , I'm trying to understand why we have to use EventListener instead of writing codes outside of it
I wrote some codes in attempt to render a triangle without using EvenListener, as I understanding that EventListener provides functions for Drawable to call, but the core rendering process is independent from it , having things only to do with the Drawable .
After I clicked run button , my screen turned white and the program lost response . I had to terminate it to end this eternal loop .
May I ask is there problem with my codes ? Why I shouldn't write them in this way ? What's the reason for my program to be dead ? Thanks for all your replies .
Additional information : 0 error 1 warning (GL_TRIANGLES should be accessed in a static way)



JFrame frame = new JFrame("title");
frame.setSize(new Dimension(1200,1200));
frame.getContentPane().add(canvas);
frame.setVisible(true);
GLContext temp = canvas.createContext(null);
temp.setGLDrawable(canvas.getDelegatedDrawable(), false);
GLContext ctx =  canvas.getContext();
canvas.setRealized(true);
System.out.print(canvas.isRealized()); //true
ctx.makeCurrent();
MyOpenGL myglobj = new MyOpenGL();
OpenGL.part1 test = myglobj.new part1(ctx.getGL().getGL3());
test.test();//It's just a bunch of glGenBuffers glBindBuffer glEnableVertexAttribArray to set up my rendering environment
canvas.getGL().getGL3().glDrawArrays(canvas.getGL().GL_TRIANGLES, 0, 12);