Demo - Fullscreen bloom/glow effect at 60fps

January 5th, 2006, 20:03 Posted By: wraggster

bluescrn posted this:

"The early version was discussed here (it's based on the display capture/dual pass demos discussed there):

http://forum.gbadev.org/viewtopic.php?t=7958

But as I've just uploaded an updated demo - which looks nicer and now runs at 60fps (although it's still C, and there's a few optimizations left) - I thought it deserved a thread of its own...

The demo (with source) is here: www.bluescrn.net/dsbloom.zip (It's still based on those previous examples, and using the ship model/rendering code from them)

And my hopeless attempt to take a screenshot: www.bluescrn.net/dsbloom.jpg

Anyone else got interesting ideas for postprocessing a capture of the 3D? - already suggested was antialiasing - you could do supersampled 2xAA at 30fps by rendering a buffer twice the size of the screen in 2 passes, then resampling it down with the CPU.

I suppose the capture system could be used for very constrained render-to-texture effects (shadows/reflection maps?) But in practice it would probably be better to have a software renderer for those things, to avoid the huge VRAM/framerate costs that could be involved?"

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