Hi Users,

I was wondering if it's possible to seed the noise generators such as f_noise?

Thanks for your help
J

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Am 19.12.2010 17:09, schrieb JSmith:
> Hi Users,
>
> I was wondering if it's possible to seed the noise generators such as f_noise?

No, not without changing the POV-Ray source code.

You can add a random offset to the function though, i.e.

#declare R = seed(4711);
#declare Rx = rand(R);
#declare Ry = rand(R);
#declare Rz = rand(R);
#declare my_f_noise3d = function( f_noise3d(x-Rx,y-Ry,z-Rz) }

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clipka <ano### [at] anonymousorg> wrote:
> Am 19.12.2010 17:09, schrieb JSmith:
> > Hi Users,
> >
> > I was wondering if it's possible to seed the noise generators such as f_noise?
>
> No, not without changing the POV-Ray source code.
>
> You can add a random offset to the function though, i.e.
>
> #declare R = seed(4711);
> #declare Rx = rand(R);
> #declare Ry = rand(R);
> #declare Rz = rand(R);
> #declare my_f_noise3d = function( f_noise3d(x-Rx,y-Ry,z-Rz) }

Thanks for the reply!

Will seeding for f_noise be implemented in source in future releases?

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On 19.12.10 18:25, JSmith wrote:
> clipka<ano### [at] anonymousorg>  wrote:
>> Am 19.12.2010 17:09, schrieb JSmith:
>>> Hi Users,
>>>
>>> I was wondering if it's possible to seed the noise generators such as f_noise?
>>
>> No, not without changing the POV-Ray source code.
>>
>> You can add a random offset to the function though, i.e.
>>
>> #declare R = seed(4711);
>> #declare Rx = rand(R);
>> #declare Ry = rand(R);
>> #declare Rz = rand(R);
>> #declare my_f_noise3d = function( f_noise3d(x-Rx,y-Ry,z-Rz) }
>
> Thanks for the reply!
>
> Will seeding for f_noise be implemented in source in future releases?

Well, note that noise isn't a simple random function you can "seed". Perlin 
noise is a bit more complicated than that. A random offset position will 
pretty much give you a good "random" seed.

	Thorsten

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Am 19.12.2010 18:25, schrieb JSmith:

> Will seeding for f_noise be implemented in source in future releases?

Not in 3.7.0, that's for sure (the version having essentially reached 
"feature freeze" at last). Nor do I see such a feature on the current 
roadmap - which doesn't say much though, as frequently individual team 
members will add a feature rather spontaneously.

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