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Scrolling

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Hi, I hope you saw some old 2D game, or a Worms Armageddon. These games uses scrolling thecnologies. How they do this? How to scrolling so fast? Anybody has got an idea? Im using DirectX8 (Direct3D, ISprites), and used DirectDraw7 too. I know the worms game uses DirectDraw6, so this idea is implementable on an slow system.

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The scrolling in Worms is pretty straight-forward. All they do is to store the entire level in a huge bitmap and blit parts of it to screen every frame, that's all there is to it really (except for the paralax layers).
It's resonably fast because Worms Armageddon runs in 640x480 and 8-bit color so a single screen is only about 256 kB large. Using the same technique in 1024x768 and with 32-bit color may be a problem even on modern (low-end) hardware.

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