Indeed, which is why I mentioned the “detail” mode which brings you back to
O(N). Not saying that one approach is better than the other though, only
that it is possible.
On 7 March 2017 at 00:12, Andy Nicholas <a...@andynicholas.com> wrote:
> Yep it is possible, but you wouldn't want to do it because each
> calculation of the maximum value would be running across N points to
> calculate that. That'd make it an O(N^2) operation, albeit spread over
> multiple threads.
>
> It might seem like a pain to have to do this in advance using an Attribute
> Promote, but by doing so, it's actually forcing you to work in a more
> efficient way. Go with it ;)
>
>
>
> On 06/03/2017 16:32, Christopher Crouzet wrote:
>
> It *is* possible to retrieve the maximum value in a VOP since nothing
> stops anyone from manually iterating through all the points of the
> geometry. This kind of operation might be more suited in “detail” mode
> though.
>
> Also, having the ramp normalized to the [0, 1] range in both the X and Y
> axis is usually “workarounded” by adding a float parameter for the
> amplitude (Y axis) that is used as a global multiplier (making later
> tweakings convenient!), and a float2 parameter for the target range (X
> axis) that is then remapped using `fit("my_ramp", 0.0, 1.0, range_min,
> range_max)` (which is also convenient for later tweakings!).
>
> Now, if you really want to have an actual FCurve, then just create a
> simple float parameter, add all the keys however you want, then query it in
> using `chf("my_param", the_time_in_seconds)` in VEX/VOP, or using the
> equivalent expression.
>
>
> On 6 March 2017 at 23:29, Jonathan Moore <jonathan.moo...@gmail.com>
> wrote:
>
>> Fabricio ,
>>
>>
>>
>> The Attribute Promote help page has approx 15 examples you can load.
>> Hopefully you might find something within the examples to inspires a
>> solution.
>>
>>
>>
>> *From:* softimage-boun...@listproc.autodesk.com [mailto:
>> softimage-boun...@listproc.autodesk.com] *On Behalf Of *Olivier Jeannel
>> *Sent:* 06 March 2017 15:56
>> *To:* Official Softimage Users Mailing List.
>> https://groups.google.com/forum/#!forum/xsi_list <
>> softimage@listproc.autodesk.com>
>>
>> *Subject:* Re: houdini question (and where to ask)
>>
>>
>>
>> You can't get the "get maximum in set" when inside a vop.
>>
>> But, you get those options with the promote attribute sop.
>>
>>
>>
>>
>> On Monday, March 6, 2017, Oscar Juarez <tridi.animei...@gmail.com> wrote:
>>
>> I would like to be proven wrong, but that would be the way, I mean in
>> your second pointvop you don't need to add another noise, your noise is
>> already saved in an attribute, when you promote just check off delete
>> original and you can access the same noise. Also noises have specific
>> output ranges, they come in the documentation, so you can always add a fit
>> node to change your range to what you need, in the geometry spreadsheet you
>> can also sort by value so you can see max and min.
>>
>>
>>
>> If you press X with your mouse over the noise output it will add a
>> visualization node, you can visualize on the viewport or in the geometry
>> spreadsheet the values. I know its not the same but as far as I know their
>> is no way to do the same as the get maximum in set node in a vopsop context.
>>
>>
>>
>>
>>
>>
>>
>> On Mon, Mar 6, 2017 at 3:57 PM, Fabricio Chamon <xsiml...@gmail.com>
>> wrote:
>>
>> thanks everyone. The ramp parameter kind of works but as you say, is not
>> that user friendly and does not show the points below 0. (that's ok, but I
>> wonder if it is possible to write a custom widget in houdini)
>>
>>
>>
>> anyway, the thing I could not get right just yet is that sort of "get
>> maximum in set" thing. Sorry for using ICE language, I'm trying to be open
>> minded here, so please tell me if that`s not the correct mindset.
>>
>>
>>
>> so on this graph:
>>
>>
>>
>> [image: Imagem inline 1]
>>
>>
>>
>> ...how could I get the maximum value of the output noise node and compare
>> to a single point output of the same node?
>>
>>
>>
>> From what I can tell, I'd have to:
>>
>>
>>
>> 1- create this pointvop node with a turbnoise, then store the output
>> noise into an attribute (via bindexport?)
>>
>> 2- up one level -> drop an attrib promote (detail), set to maximum
>>
>> 3- drop another pointvop node with another noise node inside (same
>> parameters) and compare the result noise to that found on the atrib promote
>> node??
>>
>>
>>
>> I'm 99% sure this is totally wrong...how would you go about that single
>> task specifically?
>>
>>
>>
>> and finally, thanks for the suggestions on houdini forums and discord.
>> will try both (although I pretty much like this list =) )
>>
>>
>>
>>
>>
>> 2017-03-06 15:17 GMT+01:00 gareth bell <garethb...@outlook.com>:
>>
>> yeah - the lack of handles is frustrating
>> ------------------------------
>>
>> *From:* softimage-boun...@listproc.autodesk.com <
>> softimage-boun...@listproc.autodesk.com> on behalf of Olivier Jeannel <
>> facialdel...@gmail.com>
>> *Sent:* 06 March 2017 14:05:17
>> *To:* Official Softimage Users Mailing List.
>> https://groups.google.com/forum/#!forum/xsi_list
>> *Subject:* Re: houdini question (and where to ask)
>>
>>
>>
>> yep but it has no handles
>>
>> and try to make négative values, it takes them but wont show on the curve
>> as it has a 0,1 space.
>>
>> Unless i'm wrong (which i'd love to be)
>>
>>
>>
>> Le 6 mars 2017 14:36, "Olivier Jeannel" <facialdel...@gmail.com> a
>> écrit :
>>
>> in vop, bind and bind export node will get an set datas.
>>
>> Ramp Parameters is sort of fcurve.
>>
>> It's a bit weak in terms of curve manipulation, but does the job.
>>
>> It has 2 modes rgb (ramp) and spline.
>>
>> If you use several ramps in the same vop, name them with different name
>> or they might not export.
>>
>>
>>
>> Le 6 mars 2017 14:28, "Fabricio Chamon" <xsiml...@gmail.com> a écrit :
>>
>> ..sorry, hit send too soon.
>>
>>
>>
>> Question #1: are there any equivalents to ICE "get ... in set"? or or do
>> I have to iterate and store values for later comparision? In other words:
>> what is the best or recommended workflow to compare single point data with
>> global point data?
>>
>>
>>
>> Question #2: any nodes that resemble a fCurve node, like we have in ICE?
>> if not, what is the alternative?
>>
>>
>>
>> and finally, I can see this list is becoming more and more houdini-esque
>> than ever..but, what is the best place to ask beginner questions like the
>> above? houdini foruns, houdini list, odForce...
>>
>>
>>
>> thanks!
>>
>>
>>
>> 2017-03-06 14:23 GMT+01:00 Fabricio Chamon <xsiml...@gmail.com>:
>>
>> Hi, I'm slowly getting into houdini and this is my first attempt to port
>> a really simple ridged fractal deformer made in ICE to houdini (using
>> pointvop).
>>
>>
>>
>> Question #1: are there any equivalents to ICE "get ... in set"? or or do
>> I have to iterate and store values for later comparision? In other words:
>> what is the best or recommended workflow to compare single point data with
>>
>>
>>
>>
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>
>
>
> --
> Christopher Crouzet
> *https://christophercrouzet.com* <https://christophercrouzet.com>
>
>
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