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From: fritzz@net1.UCSD.EDU (Friedrich Knauss)
Newsgroups: net.graphics
Subject: Re: question about the tracer
Message-ID: <230@net1.UCSD.EDU>
Date: Fri, 15-Aug-86 15:43:22 EDT
Article-I.D.: net1.230
Posted: Fri Aug 15 15:43:22 1986
Date-Received: Sun, 17-Aug-86 10:33:22 EDT
References: <235@joevax.UUCP>
Reply-To: fritzz@net1.UUCP (Friedrich Knauss)
Distribution: net
Organization: U.C. San Diego
Lines: 34

In article <235@joevax.UUCP> sdh@joevax.UUCP (The Doctor) writes:
>
>Like the program.  One problem: Everything comes out very dim. I tried changing
>the default for "sam" (contrast) but that didn't help.
>To make things brighter, would I change the ambient lighting, or what?
>
all sam will do is make the bottom plane less contrasty and more white.
to make things brighter try (in main()) raising the lightsource.
you do that by changing MV(0.0,900.0,0.0,ls) to something like
MV(0.0,3000,0.0,ls). I think you'd also want to enlarge the radius if
you did this.

>Also Susie doesn't come out at all.  Very indistinct.  Too bad.

changing the light source should help.

>To the best of my knowledge, the -S option (for contrast) doesn't work.
>I've tried the following:
>tracer -S0.9
>tracer -S 0.9
>
>That generates errors.  What gives?

once again a problem in main().
under case ('S'), there is an
if statement reading as follows:
if(argv[i][2] < '0' || argv[i][2] > 9)
and it should be
if(argv[i][2] < '0' || argv[i][2] > '9')

the option should then be given as -S0.9


f