Hi,

	I haven't POV-Rayed in a few years.

	Recently, though, I thought I'd make an animation for work.

	Problem: I need Bessel functions (and their derivatives - but you could
just get those from regular Bessel functions). Modeling a physical
system, and it needs to be (somewhat) accurate.

	Any hope of getting that? I think there was a patch or such a while
back, but it was for an older POV-Ray.

-- 
Red ship hits blue ship ... sailors marooned.


                    /\  /\               /\  /
                   /  \/  \ u e e n     /  \/  a w a z
                       >>>>>>mue### [at] nawazorg<<<<<<
                                   anl

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Mueen Nawaz <m.n### [at] ieeeorg> wrote:
>  I haven't POV-Rayed in a few years.

I don't know how long you've been away, but povray now features
runtime-evaluated functions to compute shapes in isosurface or texture
patterns.  Would it be possible to convert Bessel functions to povray
functions?

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nemesis wrote:
> Mueen Nawaz <m.n### [at] ieeeorg> wrote:
>>  I haven't POV-Rayed in a few years.
> 
> I don't know how long you've been away, but povray now features
> runtime-evaluated functions to compute shapes in isosurface or texture
> patterns.  Would it be possible to convert Bessel functions to povray
> functions?

	Perhaps too long - I'm not sure I even know what you mean by runtime
evaluated functions...

	In any case, I don't need Bessel functions to evaluate shapes, but
rather positions and motions (it'll be an animation).

	If I misunderstood, feel free to correct me.

	Worst case, I just won't do it.

	If I'm really motivated, I'll write a script in a language that does
have Bessel functions (e.g. Python) to create the scene files one by one
for each frame. It'll be a pain, and I don't really need it for work, so
I'll see what happens.

	I just thought I'd request it because it has been requested before, and
I suspect it'll take little effort to provide some support - I may be wrong.

-- 
"A man doesn't know what happiness is until he's married. By then it's
too late." - Frank Sinatra


                    /\  /\               /\  /
                   /  \/  \ u e e n     /  \/  a w a z
                       >>>>>>mue### [at] nawazorg<<<<<<
                                   anl

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Among other things, Mueen Nawaz saw fit to write:

> If I'm really motivated, I'll write a script in a language that does
> have Bessel functions (e.g. Python) to create the scene files one by one
> for each frame. It'll be a pain, and I don't really need it for work, so
> I'll see what happens.

You could create just a data file with that other script language (or
whatever) and then read the data from the pov file. But I guess it would be
a pain if the data you need to generate depends on the scene in POV's
world, i.e., on the result of functions such as trace or min_extend...

-- 
light_source{9+9*x,1}camera{orthographic look_at(1-y)/4angle 30location
9/4-z*4}light_source{-9*z,1}union{box{.9-z.1+x clipped_by{plane{2+y-4*x
0}}}box{z-y-.1.1+z}box{-.1.1+x}box{.1z-.1}pigment{rgb<.8.2,1>}}//Jellby

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