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 <[email protected]> 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:* [email protected] [mailto:softimage-bounces@
> 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 <[email protected]>
>
> *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 <[email protected]> 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 <[email protected]>
> 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 <[email protected]>:
>
> yeah - the lack of handles is frustrating
> ------------------------------
>
> *From:* [email protected] <
> [email protected]> on behalf of Olivier Jeannel <
> [email protected]>
> *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" <[email protected]> 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" <[email protected]> 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 <[email protected]>:
>
> 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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--
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