Forums Technical Discussion From wrangle, get point list from a group sop?

From wrangle, get point list from a group sop?

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olivierth
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Joined: 4月 2017
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Hi!

I'm processing some photogrammetry scans with millions of polygons and I'd like to choose 3 points and create a triangle out of those with a Detail Wrangle.

Is there a way my wrangle could search for the “Base Group” information found in the node called “pick_3_points” from the detail wrangle?


-Olivier

Attachments:
Houdini_getGroupInfo_fromDetailWrangle.jpg (115.1 KB)

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tamte
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Joined: 7月 2007
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you can use expandpointgroup() [www.sidefx.com] VEX function
Tomas Slancik
CG Supervisor
Framestore, NY
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olivierth
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Joined: 4月 2017
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Amazing!

Thanks again!

-Olivier
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Hatchery
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Is this what you were thinking - see attached?

Detail wrangle 1
i[]@pointnumbers;

for(int i = 0; i < npoints(0); i++){
    if(inpointgroup(0,"pick_3_points",i)){
    append(i[]@pointnumbers,i);
    }
}

int firstindex = i[]@pointnumbers[0];
push(i[]@pointnumbers, firstindex);

Detail wrangle 2 
addprim(0,"polyline",i[]@pointnumbers);

Attachments:
vex-test.hiplc (132.1 KB)

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olivierth
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Joined: 4月 2017
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Thanks. It looks like it would work but the expandpointgroup function does all that.
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