The openGl calls

    private void set3DOpenGL()
    {
        GL11.glMatrixMode(GL11.GL_PROJECTION);
            GL11.glLoadIdentity();
            GLU.gluPerspective(fieldOfView, aspectRatio, nearDistance, farDistance);
            GL11.glMatrixMode(GL11.GL_MODELVIEW);
            GL11.glLoadIdentity();
            GL11.glEnable(GL11.GL_TEXTURE_2D);
            GL11.glShadeModel(GL11.GL_SMOOTH);
            GL11.glClearDepth(1.0f);
            GL11.glEnable(GL11.GL_DEPTH_TEST);
            GL11.glDepthFunc(GL11.GL_LEQUAL);
            GL11.glHint(GL11.GL_PERSPECTIVE_CORRECTION_HINT, GL11.GL_NICEST);
            GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_S, GL11.GL_CLAMP);
    }

    private void set2DOpenGL()
    {
        GL11.glDisable(GL11.GL_LIGHTING);
        GL11.glEnable(GL11.GL_BLEND);
        GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
        GL11.glMatrixMode(GL11.GL_PROJECTION);
        GL11.glLoadIdentity();
        GL11.glOrtho(0, width, height, 0, -1f, 1f);
        GL11.glMatrixMode(GL11.GL_MODELVIEW);
        GL11.glPushMatrix();
        GL11.glLoadIdentity();
    }