But where is "Edges"? If I have an edge group, how to run some vex code for each edge in the group?
I know I can use
expandedgegroup()in Detail mode, but it will be single-threaded, without the usual benefit of using a Wrangler, right?
Attribute Wrangler: how to loop over edge group?
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- raincole
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- animatrix_
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Hi,
Edge support in VEX is a long standing RFE #58641 (11 years old). It goes hand in hand with having edge attributes which would also open up a lot of interesting workflows IMO.
Right now there are a few ways you can do this. One of them is making your own Edge Wrangle but it's quite involved:
Another approach is to utilize half edges in your code rather than edges.
Edge support in VEX is a long standing RFE #58641 (11 years old). It goes hand in hand with having edge attributes which would also open up a lot of interesting workflows IMO.
Right now there are a few ways you can do this. One of them is making your own Edge Wrangle but it's quite involved:
Another approach is to utilize half edges in your code rather than edges.
Senior FX TD @ Industrial Light & Magic
Get to the NEXT level in Houdini & VEX with Pragmatic VEX! [www.pragmatic-vfx.com] https://lnk.bio/animatrix [lnk.bio]
Get to the NEXT level in Houdini & VEX with Pragmatic VEX! [www.pragmatic-vfx.com] https://lnk.bio/animatrix [lnk.bio]
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- raincole
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- raincole
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As for the hedge solution, this is the best I can come up with:
It's rather hacky but at least it does run over the edges.
string egroup = chs("group"); int he = vertexhedge(0, @vtxnum); int spt = hedge_srcpoint(0, he); int dpt = hedge_dstpoint(0, he); int ingroup = inedgegroup(0, egroup, spt, dpt) & (spt < dpt); if(ingroup) { // Actually process the edge here }
It's rather hacky but at least it does run over the edges.
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- animatrix_
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raincoleanimatrix_
Edge Wrangle
Thank you for the answer. Is this custom node available anywhere?
Oh yes it's on my patreon. It's a really old node so I have see if it still works in the latest version of Houdini.
Senior FX TD @ Industrial Light & Magic
Get to the NEXT level in Houdini & VEX with Pragmatic VEX! [www.pragmatic-vfx.com] https://lnk.bio/animatrix [lnk.bio]
Get to the NEXT level in Houdini & VEX with Pragmatic VEX! [www.pragmatic-vfx.com] https://lnk.bio/animatrix [lnk.bio]
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