Dealing with polygon data structures like that is not always easy to do in ICE ;). I'm rather sure that it is possible to shuffle polygons orders (I did something similar in the past as an example to fix shapes with indices not matching their target). The problem is that very often you will need to rely on the repeat node to be able to access a 2D array at a specific index. First you will need to build a larger and complex graph (just to access an index...), and second, the performance will degrade in an exponential way (because the repeat node evaluate its sub-graph at each iteration).
Dealing with those mesh topology problems could be much easier using Fabric Splice. This is the exact kind of scenario where 'node graph programming' is more complicate than 'code based programming' :). Cheers, Guillaume Laforge On Sat, Dec 14, 2013 at 6:55 PM, pedro santos <probi...@gmail.com> wrote: > To add. > I know how I could add the -1 to the PolygonToVertices arrays and then > just make them a single array to feed Create Topo. But that gets me the > same exact polygon order, not a different one. > Moreover when I Randomize IDs the are not arrays, so when I use Select in > a Array to but them back in order in a set (which is not the case but > exaplains my problem) it's ok, because the set is made of a single value. > Not the same when the set is made of a array that can go from 3 (triangle) > to whatever (N-gon). > > So how do you guys Sort Sets and keep them intact? > > Cheers > > > On Sat, Dec 14, 2013 at 11:31 PM, pedro santos <probi...@gmail.com> wrote: > >> Thanks for the explanation! Now I understand why a bunch of tricks I was >> trying to pull didn't work. There doesn't seem to exist a list of >> read-only, but I think I can make prior educated guesses now. >> I've used to store it in a custom attribute before but that doesn't work >> here. I wanted to export the mesh to LightWave with the new polygon order. >> >> I tried to approach it in another fashion, using the create "Create Topo" >> node. The image depicts 3 polygons showing that in fact I can take a mesh's >> vertices to create the same mesh, but with different polygonIndex. >> I think I understand the very basics of Sets and Arrays but I'm not great >> manipulating them, so I did it by hand here with String to Array. >> >> So if I understand right PolygonIndex is a set: >> 1:[0] >> 2:[1] >> 3:[2] >> >> Just like PolygonToVertices is a set of arrays: >> 1:[0 2 3 1] >> 2:[2 6 4 3] >> 3:[1 3 4 5] >> >> Now, I've been able to randomize an array. But here I'm trying to >> randomize a set of arrays (PolygonsToVertices) and the usual solution seems >> to "Build Arrays from Sets" but then how do I put the values back say like >> this: >> 1:[1 3 4 5] >> 2:[0 2 3 1] >> 3:[2 6 4 3] >> Meaning, the arrays intact just in a different order in the set. There is >> not Sort Set with Key, like Sort Array with Key. Do I have to do some sort >> of "array of arrays" to make this work? >> >> Sorry if this is all confusing, but I seem to be missing or >> misunderstanding how these things are and can be manipulated. References >> for better understanding are welcome too. >> >> Cheers >> >> >> >> >> >> On Fri, Dec 13, 2013 at 3:56 PM, Alok Gandhi >> <alok.gandhi2...@gmail.com>wrote: >> >>> You cannot modify certain attributes, including inconsistent changes to >>> topology. If you want to assign some random ids to polygon for later use, >>> create a custom attribute. >>> >>> And yes you can set kine.global but not local. >>> >>> Sent from my iPhone >>> >>> On Dec 13, 2013, at 10:21 AM, pedro santos <probi...@gmail.com> wrote: >>> >>> Heya >>> Trying to randomize IDs but I can't seem to be able to Set that >>> property... Is there a list of properties that cannot be set? I encountered >>> this with kine.local too. >>> >>> I can Randomize IDs and the use them to something inside ICE, what I was >>> looking for was to burn that on the geometry and export it. >>> >>> Thanks >>> >>> >>> https://dl.dropboxusercontent.com/u/143766132/Forums/SI-MailingList/ICE_Polygon_Index.jpg >>> >>> <ICE_Polygon_Index.jpg> >>> >>> >> >> >> -- >> [img]http://i153.photobucket.com/albums/s202/animatics/avatar_1.gif[/img] >> > > > > -- > [img]http://i153.photobucket.com/albums/s202/animatics/avatar_1.gif[/img] >
