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From: hairston@henry.ece.cmu.edu (David Hairston)
Newsgroups: comp.sys.mac.programmer
Subject: Re: problem with PenPat() calls in THINK C
Message-ID: <13134@pt.cs.cmu.edu>
Date: 21 May 91 04:23:14 GMT
References: <1991May20.092307.29916@beaver.cs.washington.edu> <53110@apple.Apple.COM>
Distribution: na
Organization: Gaia II
Lines: 31

[chou@cs.washington.edu (Pai Chou) writes:]
[] I have problems with PenPat() in THINK C's console window.
[] ...
[] But if I call PenPat(black) or any pattern at all,
[] then the same Line() or LineTo() will not draw anything.
[] I also tried PenPat(&black)  but it doesn't make a difference.
[] My program does not crash in either case.

[stevec@Apple.COM (Steve Christensen) writes:]
[] For C you should be using PenPat(&qd.black).  The Inside Mac documentation
[] was written primarily for Pascal which automatically handles the "&qd."
[] part...

that's MPW C ... Think C defines Pattern:

typedef unsigned char Pattern[8]

and uses:

extern Pattern black;

and so on.  so the call in Think C is PenPat(black), for example.
however, in special cases, the compiler ignores the address operator
on an array variable, thus PenPat(&black) is equivalent to
PenPat(black).

as to why this doesn't work in the console window, i dunno,  are you
setting the port to that window?

  -dave-  
hairston@henry.ece.cmu.edu