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Path: utzoo!watmath!watnot!watcgl!fdfishman
From: fdfishman@watcgl.UUCP (Flynn D. Fishman)
Newsgroups: net.micro.amiga
Subject: I need more help with Graphics and Manx
Message-ID: <699@watcgl.UUCP>
Date: Fri, 16-May-86 13:49:39 EDT
Article-I.D.: watcgl.699
Posted: Fri May 16 13:49:39 1986
Date-Received: Sat, 17-May-86 04:00:00 EDT
Distribution: net
Organization: U of Waterloo, Ontario
Lines: 37

Hi remember me,  I am back with another (manx) C problem and since I got
such a great response last time I am calling out again.

The situation:  I am trying to draw lines in the Hires Interlace mode of the
Amiga.  Being new to C I decided to cheat and modify someone elses program.
I chose to alter moire.c by Scott Ballantyne (I hope you do not mind Scott)
what I did is added #include <graphics/display> and changed 
MAXY to 400 instead of 200.  and in the NewScreen Struct I changed HIRES
to HIRES|INTERLACE.  

The program compiles and runs fine using Manx 3.20a except that instead of
drawing to the bottom of the screen any point that would normally be below
a certain level (perhaps 256) is shifted upwords or (mod n) this causes
some of my lines to go to the wrong place.  

Did I forget anything is setting up the screen?  If anybody has any ideas
I would appreciate them.

I am using a 512k amiga with dual drives.

p.s.  I sent out a long list of thank-you's for the help I got on my last 
request but yesterday I got most of them back in my User Unknown file.
I will be trying to send them out again with my supervisors help, however,
I would like everyone to know that I did appreciate the help I got.

p.p.s. To Thomas Miles, have no fear I am using a 100% legal copy.  Also try
  to compile your code using the +l option this will change the compilers
  default to 32 bit integers as opposed to the old default of 16 bits which
  do not work with garphics. 
 
-- 

      FDFISHMAN (Flynn D. Fishman)

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