Hi.

You should not draw the full scene graph into a buffer that will be copied
to your OGL stuff in every step/loop. This is slow. You should make use of
the default world redraw optimization with dirty rectangles. Maybe like
this:

1. Modify WorldState>>displayWorldSafely: to draw into a buffer form and NOT
into the DisplayScreen.
2. Add a postprocessing step to WorldState>>doOneCycleFor: or use #step in a
Morph (with stepTime == 0) to copy this buffer to your OGL stuff.

I don't know how specific the form DisplayScreen is. Maybe you can directly
copy its contents into your OGL world.

Marcel

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