Path: utzoo!utgpu!water!watmath!clyde!cbosgd!ucbvax!hplabs!well!ewhac
From: ewhac@well.UUCP (Leo 'Bols Ewhac' Schwab)
Newsgroups: comp.sys.amiga
Subject: Re: Need MORE HELP on GAME DEVELOPMENT on the Amiga
Keywords: Just one more question (or two)...
Message-ID: <5051@well.UUCP>
Date: 23 Jan 88 22:19:28 GMT
References: <1617@ssc-vax.UUCP> <5038@well.UUCP> <39432@sun.uucp>
Reply-To: ewhac@well.UUCP (Leo 'Bols Ewhac' Schwab)
Organization: Lt. Col. Oliver North, Overseas Shipping and Receiving.
Lines: 22

In article <39432@sun.uucp> cmcmanis@sun.UUCP (Chuck McManis) writes:
>Just out of curiosity, has anyone tried opening a 4 bitplane window,
>and then creating two additional rastports one of which is a 3 plane,
>and one of which is a 1 plane? Then for background images you draw
>into the 3 plane rastport, and for shadow stuff you draw into the 
>1 plane rastport.  [ ... ]

	Yup, it's perfectly valid.  In fact, I did it for a commercial
program I wrote in early '86 (Typing Tutor plus Word Invaders).  1.1 had a
bug in the ScrollRaster() call, in that it failed to observe the
RastPort.Mask field correctly.  So I set up a "bogus" RastPort that pointed
to the plane I was interested in.  Worked great.

	A neat side effect was that the programming got easier; I didn't
have to do all sorts of fiddling around with a single RastPort's mask field.

_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
Leo L. Schwab -- The Guy in The Cape	ihnp4!ptsfa -\
 \_ -_		Recumbent Bikes:	      dual ---> !{well,unicom}!ewhac
O----^o	      The Only Way To Fly.	      hplabs / (pronounced "AE-wack")
"Simplicity and clarity should be your theme in dress."
		-- A fortune cookie I got in LA's Atomic Cafe.