Basically, arrays are a convenient structure to pass data around (and to potentially make your code more readable, which won't apply to VOP). If all you need is to perform a computation in place and directly use the result in your VOP graph, then iterating over your points is all it takes—no array needed.
I don't know what what you're planning to do with that array of point positions but I've attached a screenshot with a simple example. It iterates over all the points, retrieve their position, and outputs the centre of mass. Note that it's better to run this specific example in “detail” mode to perform the computation only once, instead of once per point. On 2 March 2016 at 21:32, Olivier Jeannel <[email protected]> wrote: > Yes I saw it, sorry, I thought there was another additionnal method with > For Loop : > "Instead, you should be able to just loop over each point with a `For > Loop VOP` and do your computation directly in there" > Have I misunderstood ? You're doing a for-loop without building an array > in the end. > > On Wed, Mar 2, 2016 at 3:26 PM, Christopher Crouzet < > [email protected]> wrote: > >> I did attach a screenshot in my previous email, are you not seeing >> anything? Or are you asking for the H13 for loop? >> >> >> On 2 March 2016 at 21:20, Olivier Jeannel <[email protected]> wrote: >> >>> Aaaaah THANK YOU ! >>> >>> I'm "aware" of the PCOpen+PcFilter to gather infos based on distance. >>> I also use the PrimUV a bit and XYZ+PrimUV for location things. >>> >>> I'd be curious on the For Loop Vop, if you have any pictures :/ Sorry to >>> ask. >>> >>> It's a shame there's no tutorial or phylosophycal explanations of these >>> basic loops ... It's like if everybody was a natural born coder... >>> >>> >>> >>> On Wed, Mar 2, 2016 at 3:13 PM, Christopher Crouzet < >>> [email protected]> wrote: >>> >>>> It seems like they've extended the support for arrays in H14, which >>>> makes it now possible to use them as geometry attributes. In the previous >>>> versions I guess that there was no real point (but convenience) in creating >>>> arrays in VOP since you couldn't pass them downstream with the geometry >>>> data. >>>> >>>> So if you're on H14+, it seems like you were on the right path? I've >>>> attached a working screenshot that stores every point position in a >>>> “output” vector array attribute. >>>> >>>> If like me you're stuck with H13, you probably don't need to store your >>>> point positions in an array at all. Instead, you should be able to just >>>> loop over each point with a `For Loop VOP` and do your computation directly >>>> in there. Now I've never used VOPs since I prefer writing directly in VEX >>>> so I might be wrong :) >>>> >>>> Also don't forget to use point clouds if you're after distance-related >>>> queries. >>>> >>>> >>>> On 2 March 2016 at 19:29, Olivier Jeannel <[email protected]> >>>> wrote: >>>> >>>>> Hello serious list :) >>>>> >>>>> I'm a bit confused with houdini vop array. >>>>> While I managed to do it in vex, I would like to make a build array >>>>> (like build array from set) of the pointposition (P) in VOP. >>>>> >>>>> I understand you need to for-loop on each Ptnum and probably append >>>>> the P values and this will buid an array of P. >>>>> But you know what ? Well I can't manage to make it work. >>>>> >>>>> I found no example on the net (sideFX, odforce). >>>>> The doc is just words, no schemes, no graphics. >>>>> The examples hips are bizarre, not so simple, and use the old loop >>>>> node. >>>>> >>>>> So I'm wondering if someone from here could provide a screen shot of >>>>> how that should be connected ? >>>>> >>>>> Thank you :) >>>>> >>>>> >>>>> ------ >>>>> Softimage Mailing List. >>>>> To unsubscribe, send a mail to [email protected] >>>>> with "unsubscribe" in the subject, and reply to confirm. >>>>> >>>> >>>> >>>> >>>> -- >>>> Christopher Crouzet >>>> *http://christophercrouzet.com* <http://christophercrouzet.com> >>>> >>>> >>>> ------ >>>> Softimage Mailing List. >>>> To unsubscribe, send a mail to [email protected] >>>> with "unsubscribe" in the subject, and reply to confirm. >>>> >>> >>> >>> ------ >>> Softimage Mailing List. >>> To unsubscribe, send a mail to [email protected] >>> with "unsubscribe" in the subject, and reply to confirm. >>> >> >> >> >> -- >> Christopher Crouzet >> *http://christophercrouzet.com* <http://christophercrouzet.com> >> >> >> ------ >> Softimage Mailing List. >> To unsubscribe, send a mail to [email protected] >> with "unsubscribe" in the subject, and reply to confirm. >> > > > ------ > Softimage Mailing List. > To unsubscribe, send a mail to [email protected] > with "unsubscribe" in the subject, and reply to confirm. > -- Christopher Crouzet *http://christophercrouzet.com* <http://christophercrouzet.com>
------ Softimage Mailing List. To unsubscribe, send a mail to [email protected] with "unsubscribe" in the subject, and reply to confirm.
