Path: chuka.playstation.co.uk!scea!peter_alau@playstation.sony.com
From: Elliott Lee <tenchi@netmagic.net>
Newsgroups: scee.yaroze.beginners
Subject: Re: Getting a sprite to leave a trail
Date: Fri, 29 May 1998 10:31:03 -0700
Organization: Cisco Systems
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Message-ID: <356EF0D7.9D72D3F@netmagic.net>
References: <356C9B7A.C18CCEE4@easynet.co.uk> <6ki72j$lev11@chuka.playstation.co.uk> <356CAE49.AFC4F92E@netmagic.net> <356D2C25.C4E7B0B3@hinge.mistral.co.uk> <356F2542.6F7C@easynet.co.uk>
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philip gooch wrote:
	[...]
> Thanks guys
> 
> So its multiple sprites then to handle the trails. I should be able to
> handle that.
> 
> But anyone know how certain other effects are done - for instance I've
> seen Yaroze games where the whole screen melts away, starting from the
> centre. Is there a way of addressing individual pixels in the frame
> buffer to shift them around, apply different transparencies and RGB
> values to them etc to create this effect?
> 
> Phil

To move VRAM data around, use the MoveImage() command.  If you want
destructive algorithms, you can just copy the visible frame buffer
to the work frame buffer then shift things around.  If you want to
rotate, scale, or do other stuff, I'd recommend clearing some space
in VRAM and maintaining a copy of the frame buffer in there.  Then you
can treat it as a sprite and paste it back into the work frame buffer.

Ben James (SCEE), who did the Psychon game, had some cool effects...

- e!
  tenchi@netmagic.net
  http://www.netmagic.net/~tenchi/yaroze/