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Article #21283

Apology: True Colour *IS* great for games.

#21283
From: Warwick Allison
Date: Mon, 21 Dec 1992 02:44
29 lines
1665 bytes
A while back I said that bit-plane modes are better than the word-per-pixel
modes, for speed of sprite drawing, and TrueColour (word-per-pixel) would
be best used just for title screens.  bzzt - I was wrong.


I did some calculations and coding on the weekend, and it turns out that
TrueColour (word-per-pixel) is actually VERY good for games.  I expect
that a game using the Falcon 320x240 truecolor mode will be around twice
the speed of the same game written on an ST using Low resolution, simply
due to the CPU speed.  And a LOT prettier (65536 colours vs. 16).

    ie. drawing sprites in TrueColour is as fast as drawing them
        in 4 bitplane mode.  

Plus, sound processing will have a MUCH lower cpu overhead on the Falcon,
so games will gain speed there (and sound a lot better!)

The reason why TrueColour is so good for games is that no shifting is
required, plus only the area actually drawn on needs to be accessed (and
hence stored for wiping purposes).


--
Warwick
--
  _-_|\      warwick@cs.uq.oz.au            /Disclaimer:
 /     * <-- Computer Science Department,  /  
 \_.-._/     University of Queensland,    /   C references are NULL && void*
      v      Brisbane, Australia.        /  
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From: warwick@cs.uq.oz.au (Warwick Allison)
Newsgroups: comp.sys.atari.st
Subject: Apology:  True Colour *IS* great for games.
Message-ID: <11490@uqcspe.cs.uq.oz.au>
Date: 21 Dec 92 02:44:05 GMT
Sender: news@cs.uq.oz.au
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