Newsgroups:	comp.os.msdos.djgpp
From:	"A. Jans-Beken" <jabe AT oce DOT nl>
Subject:	Allegro - shadow of sprites
Message-ID:	<33387866.3593@oce.nl>
Sender:	news AT oce DOT nl (The Daily News @ nntp01.oce.nl)
Organization:	Océ-Nederland B.V.
Mime-Version:	1.0
Date:	Wed, 26 Mar 1997 01:14:14 GMT
Lines:	14
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

In a game I am working on I want objects to cast shadow on the ground. 
With Allegro it is possible for graphic object to regard color 0 as 
transparent. What do I have to do to replace color 1 with the current 
background color minus (for example 3). 

I tried to fix it in the source-code of Allegro my self but this proved 
to be to difficult for me (I don't know too much about assembler 
programming!).

I have heard that color 1 is used as the "shadow color" in other projects 
as well so it seems the logical choice to me.

greetings,
A. Jans-Beken

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