OK, great... I can see how to customize it from that snippet. Just to understand how the power users are using this. Are you using wrangle nodes with vex snippets 100% of the time or are you using the VOP sub graph for somethings?
Steven On Wed, Apr 26, 2017 at 11:38 AM, Andy Nicholas <[email protected]> wrote: > If you have a look at the docs for pcfilter, it gives you some VEX code > that’s the equivalent functionality. You can tweak to suit your needs. > > Pasted in from the docs: > > - - - - > > float pcfilter(int handle; string channel) > { > float sum, w, d; > float value, result = 0; > while (pciterate(handle)) > { > pcimport(handle, "point.distance", d); > pcimport(handle, channel, value); > w = 1 - smooth(0, radius, d); > sum += w; > result += w * value; > } > result /= sum; > return result; > } > > pcfilter takes the points that were opened by the point cloud and produces > a filtered value. The following equation shows how the individual points > are weighted. > > w_i = 1-smooth(0, maxd*1.1, d_i); > > maxd is the farthest point, and w_i is the weight for a given point at > distance (d_i). Points that are closer to the center will be weighted > higher with that formula, rather than it being an average. > > > On 26 Apr 2017, at 19:25, Steven Caron <[email protected]> wrote: > > So pcfilter has weighting built into it? > > I guess I want to customize this weighting should I not use pcfilter? and > use pcfind and loop over the particles? > > > On Wed, Apr 26, 2017 at 11:18 AM, Andy Nicholas <[email protected]> > wrote: > >> Yep, I’m afraid I’m a complete VEX convert now. I never used to be! >> >> Cris, don’t mind me posting stuff like that, I’m just doing it in case >> it’s useful to anyone who’s trying to get into VEX. Actually, when I was >> learning to do all the point cloud stuff, I found it useful to see the VEX >> when I was trying to understand how to hook up the pointcloud VOPs. I >> (still) don’t think it’s obvious how to do it, especially when you start >> thinking about if it’s necessary to use pcclose() and where that should be >> wired. >> >> It’s one of the reasons I moved to VEX, things like “loops" and “if” >> statements are much easier to understand in VEX than VOPs. >> >> >> >> On 26 Apr 2017, at 19:07, Steven Caron <[email protected]> wrote: >> >> Thanks guys! I didn't want to use VEX even though I might need to in the >> long run. >> >> On Wed, Apr 26, 2017 at 10:57 AM, Andy Nicholas <[email protected]> >> wrote: >> >>> Yep, what Cris said. Here’s some VEX you can drop in a Point Wrangle if >>> you want to try that approach: >>> >>> float radius = 1.0; >>> int maxpts = 50; >>> int handle = pcopen(0, "P", @P, radius, maxpts); >>> @P = pcfilter(handle, "P"); >>> >>> >>> On 26 Apr 2017, at 18:37, Cristobal Infante <[email protected]> wrote: >>> >>> pcopen > pcfilter (P) will give you the nearest positions. >>> >>> >>> >>> On 26 April 2017 at 18:27, Steven Caron <[email protected]> wrote: >>> >>>> i hate to do it but i gotta ask this group because of our shared ICE >>>> knowledge... >>>> >>>> what is the proper way to get closest points and average their position >>>> and update the point position? >>>> >>>> pcfind gives me an integer array, but how do i look up those indices >>>> and get their point position? >>>> >>>> pcopen, then pcimport, do work, then pcexport seems like the right >>>> thing to do, should i just ignore pcfind? >>>> >>>> thanks >>>> steven >>>> >>>> ------ >>>> 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. >>> >>> >>> >>> ------ >>> 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. >> >> >> >> ------ >> 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. > > > > ------ > Softimage Mailing List. > To unsubscribe, send a mail to [email protected] > with "unsubscribe" in the subject, and reply to confirm. >
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