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Ron Parker wrote:
> On Fri, 30 Oct 1998 00:16:25 -0500, Jerry Anning <cle### [at] dhol com> wrote:
> >Ron Parker wrote:
>
> >> Finally, if you're looking for someone to write a function to do what
> >> Noise does in a POV script, then you asked in the right group. It's
> >> really easy to add, but nobody's ever asked for it. Maybe it'll find
> >> its way into the superpatch before I freeze development on it.
> >
> >What about the noise3d function from the Isosurface patch?
>
> You can't use it in an expression. It only works in isosurfaces, implicits,
> parametrics, and textures: basically, everywhere you can use a #declared
> function.
>
> That's not to say it _couldn't_ work, only that it doesn't.
One patch I made to my v3.02 code was an "evaluate" function which took a
declared isosurface function and a position vector, returning the value of the
function at that position. I am not sure if I still have a copy of this, but I
remember it being quite a simple to patch to implement, mostly an extra function
in the expression parsing code.
I was going to try extending this to return values for any texture pattern,
but v3.1 betas started ariving and I got very sidetracked ... Thinking about it,
it may be easier in v3.1 - the relavent code to get a pattern value must be in
several places, so all that's needed is a wrapper function in the expression
parser? I'll try to peruse the SuperPatch source and see if I can put a
patchette together this weekend :-)
Bye for now,
Mike Andrews.
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