[Sidefx-houdini-list] Noise

Jerome Pastorello lordkarington0 at gmail.com
Tue Aug 30 04:47:44 EDT 2016


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 :)
>>>>>>>> _______________________________________________
>>>>>>>> Sidefx-houdini-list mailing list
>>>>>>>> Sidefx-houdini-list at sidefx.com
>>>>>>>> https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list
>>>>>>> 
>>>>>>> --
>>>>>>> Christopher Crouzet
>>>>>>> *http://christophercrouzet.com* <http://christophercrouzet.com>
>>>>>>> _______________________________________________
>>>>>>> Sidefx-houdini-list mailing list
>>>>>>> Sidefx-houdini-list at sidefx.com
>>>>>>> https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list
>>>>>>> 
>>>>>>> _______________________________________________
>>>>>> Sidefx-houdini-list mailing list
>>>>>> Sidefx-houdini-list at sidefx.com
>>>>>> https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list
>>>>> 
>>>>> _______________________________________________
>>>>> Sidefx-houdini-list mailing list
>>>>> Sidefx-houdini-list at sidefx.com
>>>>> https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list
>>>> _______________________________________________
>>>> Sidefx-houdini-list mailing list
>>>> Sidefx-houdini-list at sidefx.com
>>>> https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list
>>> _______________________________________________
>>> Sidefx-houdini-list mailing list
>>> Sidefx-houdini-list at sidefx.com
>>> https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list
>> 
>> 
>> 
>> --
>> Christopher Crouzet
>> *http://christophercrouzet.com* <http://christophercrouzet.com>
>> _______________________________________________
>> Sidefx-houdini-list mailing list
>> Sidefx-houdini-list at sidefx.com
>> https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list
> _______________________________________________
> Sidefx-houdini-list mailing list
> Sidefx-houdini-list at sidefx.com
> https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list



More information about the Sidefx-houdini-list mailing list