calculating neighbours of primitive cubes

Forums Houdini Indie and Apprentice calculating neighbours of primitive cubes

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212AA: Member; 7 posts; Joined: March 2016; Offline

Sept. 7, 2017 4:19 p.m.

Hi there,

I was wondering how i might go about storing the neighbours of primitive cubes. i've packed the geometry so i have 1 ID per cube but i wanted to get some advice on how i might store each cube's neighbours, preferably in python?

Attachments:
1.JPG (43.8 KB)


mestela: Member; 1737 posts; Joined: May 2006; Offline

Sept. 8, 2017 9:24 a.m.

nearpoints will do that for you.

Attachments:
nearpoints_example.hipnc (58.5 KB)

http://www.tokeru.com/cgwiki [www.tokeru.com]
https://www.patreon.com/mattestela [www.patreon.com]


212AA: Member; 7 posts; Joined: March 2016; Offline

Sept. 9, 2017 8:50 a.m.

hmm, i need to obtain the diagonal neighbours also, so all the primitives that share a vertex with the primitive cube in question


mestela: Member; 1737 posts; Joined: May 2006; Offline

Sept. 9, 2017 5:30 p.m.

You can increase the radius of the search to get the diagonals, the docs should give you all you need to know:

http://www.sidefx.com/docs/houdini/vex/functions/nearpoints [www.sidefx.com]

If you've connected your packed prims with edges, then you want to use the neighbours function instead:

http://www.sidefx.com/docs/houdini/vex/functions/neighbours [www.sidefx.com]

Edited by mestela - Sept. 9, 2017 17:30:39

http://www.tokeru.com/cgwiki [www.tokeru.com]
https://www.patreon.com/mattestela [www.patreon.com]


212AA: Member; 7 posts; Joined: March 2016; Offline

Sept. 10, 2017 9:08 a.m.

thanks mestela i'll give it a go

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