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- Path: mycroft.ECE.ORST.EDU!brindley
- From: brindley@mycroft.ECE.ORST.EDU (Mike Brindley)
- Newsgroups: comp.sys.amiga.programmer
- Subject: Re: Scrolling only selected bitplanes
- Date: 19 Mar 1996 06:20:38 GMT
- Organization: Electrical and Computer Engineering, Corvallis
- Message-ID: <4iljnm$lhq@engr.orst.edu>
- References: <314e1835@beachyhd.demon.co.uk>
- NNTP-Posting-Host: mycroft.ece.orst.edu
-
- In article <314e1835@beachyhd.demon.co.uk>, <Adam@beachyhd.demon.co.uk> wrote:
- >
- >However, I don't quite know how I can achieve this effect. Both WritePixel()
- >and ScrollRaster() both operate on *all* bitplanes in the Rastport. Is there
- >any way I can get these functions to leave the final plane completely alone?
-
- Sure, RKM Libraries 3, pg. 583 "RastPort Write Mask". The macro
- SetWrMsk() should do the trick.
-
- Can you achieve your parallax scrolling with dual playfields?
-
- --
- --> Mike Brindley
- brindley@ece.orst.edu
-