I found the "spark" maker here on my computer. Holler if you want it. I
couldn't find a url to it in the readme. The name is Stomps Spark
Generator if you want to try searching for it.
Never mind, found it:

 http://www.sky.net/~keystone/trace/spark.htm

But it looks like its not what I was thinking of, more of a lightning
maker instead.
I know there is another such thing, "sparker.inc" maybe? I've seen it
make that grinding wheel type spray of sparks, so it does exist. Perhaps
someone here will know.


Bob Hughes wrote:
> 
> Should be a simple matter of CSG (constructive solid geometry, fancy
> term for shapes combined into various other shapes by means of additive,
> subtractive, and combination of the two, modeling; excuse me if you
> already knew that) and using appropriate high ambience (glowing)
> textures.
> Afraid you are probably going to at least have to start a script/render
> to show something of what you intend though to get real good help on it.
> Maybe not, you never know here.
> I did a lot of pyrotechnics as a 14 year old boy so I know a bit about
> what you mean. Phosphorous, sulfur, charcaol, and a whole lot of other
> chemicals too numerous to mention, even silicon (ground, powdered
> glass).
> Nothing of sparktesting however :(
> Colors and types of spark I can imagine based upon compositions and size
> of the particles but that's been two dozen years since I "burned"
> chemicals. Not the exact same thing I'm sure.
> Really it sounds quite simple though, give a holler about need of
> special shapes and someone will probably have an idea. Or the spark
> stream effect, there's a include file (or is it executable?) somewhere
> for doing that sort of thing, albeit probably not in the way you want.
> Hopefully the grinder will get spinning soon enough for you.
> 
> "Dennis A. Smith" wrote:
> >
> > OK, people, imagine this.....
> > My primary occupation is a sparktester.  A sparktester uses a high speed
> > hand held grinder with a 2-1/2" abrasive wheel to "sparktest" steel to
> > determine the approximate percentage of the chemical elements (carbon,
> > phosphurous, sulphur, silicon, moly, vanadium, & others) that make up the
> > steel alloy.  The various elements burst in unique shapes in the the spark
> > stream emitted from the contact....I swear!
> >
> > We have never been able to adequately photograph these tests for published
> > training manuals.  I know what they look like, and I would like to see if it
> > can be described by ray tracing (Pov-Ray 3.1)
> >
> > Can someone give me a start in the right direction? I would like to dipict
> > only the wheel and the spark stream which is emitted from the contact with a
> > particular grade of steel.  Any help in getting off the ground here would be
> > appreciated.
> >
> > Thanks,
> > Dennis A. Smith
> > dsm### [at] netnitconet
> 
> --
>  omniVERSE: beyond the universe
>   http://members.aol.com/inversez/POVring.htm
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  http://members.aol.com/inversez/POVring.htm
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