vex question - haspointattrib - isolating objects

[MadMax50]

Hello

I am not sure if this is the place for vex questions, I couldn't find any designated forum for it. 

I am trying to isolate some objects that intersect with a curve. I have attempted to use the "haspointattrib" function for this, but it seems as if I may not understand how to use it properly regardless of my research. I was expecting the function to return 1 or 0 depending on if it had the "touch" attribute, and then I would isolate the pig heads based on that value to isolate what I need. ....  Would someone be able to help me with this, or perhaps let me know what the best possible solution would be to just isolate the pig heads that touch the curve ?

 

I know I can do an attrib transfer with some grouping but that may select pig heads that are also not interesecting. with the curve exactly

Please and thank you

detect_attrib_and_isolate.hip

[konstantin magnus]

Hi @MadMax50,

after the intersect node, fuse and attribute promote can create an array for grouping the intersecting geometry with VEX:

int index[] = detail(1, 'index', 0);

foreach(int i; index){
    setpointgroup(0, 'in', i, 1, 'set');
}

The best place for VEX related questions on odforce is probably the scripting section: https://forums.odforce.net/forum/28-scripting/ 

group_intersect.hipnc

[vicvvsh]

Hi,

here a couple more variants

 

detect_attrib_and_isolate_01.hipnc

[MadMax50]

@vicvvsh @konstantin magnus Thank you both, I am studying all of your solutions

[eirik2377]

I would just pack each pighead.
Do a group based on the distance function, and transfer that group over when unpacking.
Then it just has to calculate over a few points instead of all that geometry.