Re: .mtl question

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Angus Dorbie (dorbie++at++sgi.com)
Mon, 12 Jul 1999 14:23:08 -0700

Where did you get these terms from? The extension suggests a file format
and that in turn suggests that this has little to do with Performer but
rather the file format in question.

Presumably they are from some lighting equation in the absence of that
equation I'll guess.

"d.pritchard++at++emedia.ca" wrote:
>
> Hi,
>
> I have a quick .mtl question. What does Ns, d, illum, Kd, Ks, Ka mean?
> How do you make a listed material (non-.rgb and .rgb's) transparent?
>
> newmtl default
> > Ns 32
Shininess exponent

> > d 1
??
> > illum 2
?? some global modifier, or maybe a list of illuminating lights???

> > Kd 0.4 0.4 0.4
diffuse rgb

> > Ks 0.7 0.7 0.7
specular rgb

> > Ka 0.3 0.3 0.3

ambient rgb

Cheers,ANgus.

-- 
For years now, whenever NT has been proven to have some debilitating
weakness we've heard from MS advocates that NT would catch up, there was
just an incredible faith in this OS and Microsoft's ability to somehow
get there. With the recent results of the Linux vs NT serving benchmark
that same attitude can be seen in the Linux community. The Linux folks
aren't too worried, "Sure the single threaded IP stack was slow but
it'll be fixed in the next release.", it's eerily familiar but I have
confidence in the Linux community's ability to remedy problems and I
don't groan in pain as I used to when Microsoft made similar claims.


For advanced 3D graphics Performer + OpenGL based examples and tutors:
http://www.dorbie.com/

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