[Sidefx-houdini-list] Noise

Olivier Jeannel facialdeluxe at gmail.com
Tue Aug 30 07:00:42 EDT 2016


Alright ! Thank you guys :)

On Tue, Aug 30, 2016 at 10:47 AM, Jerome Pastorello <
lordkarington0 at gmail.com> wrote:

> Just to use the min and max options of the promote.
>
>
>
> > Le 30 août 2016 à 10:11, Olivier Jeannel <facialdeluxe at gmail.com> a
> écrit :
> >
> > Hi Boris, not sure I understand your method. Why do I need to promote to
> > detail ?
> >
> > Hi Christopher, I didn't know about he fitted output of the Unified
> Noise,
> > thank you !
> >
> > One more question, here :
> > http://www.sidefx.com/docs/houdini15.0/nodes/vop/turbnoise
> > It talks about "cost" per noise. What is cost ? Computation time ?
> >
> > On Tue, Aug 30, 2016 at 9:51 AM, Christopher Crouzet <
> > christopher.crouzet at gmail.com> wrote:
> >
> >> There is the Unified Noise VOP node which fits the output of all the
> noises
> >> within the range 0 to 1 :
> >> http://www.sidefx.com/docs/houdini15.0/nodes/vop/unifiednoise
> >>
> >> In the `houdini/vex/include` folder there's a file called `pyro_noise.h`
> >> which shows its implementation—it's an interesting place to see how the
> >> min/max values are being defined.
> >>
> >>
> >> On 30 August 2016 at 14:43, Boris Cohen Tanugi <
> b.cohen.tanugi at gmail.com>
> >> wrote:
> >>
> >>> Hey Olivier,
> >>> Just store it in an attrib to check min max. You can to a 2 pass fit
> >>> (setting noise, then promote to detail min/max, then fit the result
> >>> accordingly)
> >>>
> >>> 2016-08-30 9:36 GMT+02:00 Olivier Jeannel <facialdeluxe at gmail.com>:
> >>>
> >>>> I understand. But sometimes (always) you're deep down in vop and all
> >> you
> >>>> want is add a little bit of turbulence.
> >>>> Am I wrong or is it not possible to get the max-out and min-out values
> >>>> coming out from noise node ? So that you know what to fit..
> >>>>
> >>>> Le 30 août 2016 02:41, "François Duchesneau" <sidefx at trinix.ca> a
> >> écrit
> >>> :
> >>>>
> >>>>> The anti-Alias noise ranges between -0.35 and 0.35 but as you
> >> increase
> >>>> the
> >>>>> Roughness it tends to go beyond those values.
> >>>>>
> >>>>> When I haven't played with a particular noise for a while, I like to
> >>> use
> >>>>> it on a straight line in X for example and look at the values in an
> >>>>> orthogonal view with different roughness and frequencies. It helps so
> >>>> much
> >>>>> to understand what's in there.
> >>>>>
> >>>>> Francois
> >>>>>
> >>>>>> On 08/29/2016 10:29 AM, Olivier Jeannel wrote:
> >>>>>>
> >>>>>> Ah ! Thank you Christophe !
> >>>>>>
> >>>>>> On Mon, Aug 29, 2016 at 4:03 PM, Christopher Crouzet <
> >>>>>> christopher.crouzet at gmail.com> wrote:
> >>>>>>
> >>>>>> Approximate ranges are given in the Turbulent Noise VOP node page:
> >>>>>>> http://www.sidefx.com/docs/houdini15.0/nodes/vop/turbnoise
> >>>>>>>
> >>>>>>> That's not the easiest page to remember IMO—most of the time when
> >>>> looking
> >>>>>>> for these values, I first stumble upon the Noise and Randomness
> >>>>>>> <http://www.sidefx.com/docs/houdini15.0/vex/random> page then
> >> wonder
> >>>> why
> >>>>>>> it's not listed in there.
> >>>>>>>
> >>>>>>>
> >>>>>>> On 29 August 2016 at 20:41, Olivier Jeannel <
> >> facialdeluxe at gmail.com>
> >>>>>>> wrote:
> >>>>>>>
> >>>>>>> Hello list,
> >>>>>>>>
> >>>>>>>> A manual question
> >>>>>>>>
> >>>>>>>> Each time I use a noise ( AA, Perlin, Sparse, ... ), I can't
> >>> remember
> >>>>>>> what
> >>>>>>>
> >>>>>>>> values it is spitting. I know I can read them in  the Geometry
> >>>>>>> Spreadsheet,
> >>>>>>>
> >>>>>>>> but I'm just looking for a place (in the doc ? ) where they would
> >> be
> >>>> all
> >>>>>>>> listed and never ask that question again...
> >>>>>>>>
> >>>>>>>> Thank you :)
> >>>>>>>> _______________________________________________
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> >>>>>>>
> >>>>>>> --
> >>>>>>> Christopher Crouzet
> >>>>>>> *http://christophercrouzet.com* <http://christophercrouzet.com>
> >>>>>>> _______________________________________________
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> >>>>>>>
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> >>
> >>
> >> --
> >> Christopher Crouzet
> >> *http://christophercrouzet.com* <http://christophercrouzet.com>
> >> _______________________________________________
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