Path: utzoo!utgpu!utstat!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!hplabs!hpfcdc!hpfelg!koren
From: koren@hpfelg.HP.COM
Newsgroups: comp.graphics
Subject: Re: QRT to GIF Image Converter
Message-ID: <1140014@hpfelg.HP.COM>
Date: 6 Mar 89 19:26:43 GMT
References: <5620@watdcsu.waterloo.edu>
Organization: HP Elec. Design Div. -FtCollins
Lines: 24


>  QRT is a great ray-tracer.  It's script language is MUCH better than

Thanks!

>  Anyway -- back to the GIF conversion utility.  The way the QRT source is
>  currently coded, the .RAW file format is machine-specific.  I changed
                                            ~~~~~~~~~~~~~~~~
It shouldn't be (if you're talking about the byte ordering problem, that
is).  That's why I explicitly write the bytes in a certain order:

     fputc(((unsigned char)(lineno&(0xff))),THEWORLD.filept);
     fputc(((unsigned char)(lineno>>8)),    THEWORLD.filept);

As long as they are explicity read back in with:

        line  = ((unsigned int)fgetc(in));
        line += ((unsigned int)(fgetc(in) << 8));

or some such, everything should be machine independent.  I have gotten
into the habit of always doing this explicit byte ordering thing; it
greatly simplifies the task of porting stuff.

          - steve