Group By Bounding Object Problem

[MIguel P]

Hello people.

When I want to group points by bounding objects in SOPs, the points in the zones where the objects are overlapped, leave the group. There is any way to fix it?

I attach an image.

[michael]

off the top of my head you could use a cookie with 'union'

[MIguel P]

off the top of my head you could use a cookie with 'union'

The spheres are primitives, and copied into particles... I think it doesn't work. But thank you.

[danielpferreira]

Try to generate a isooffset and then use the resultant object for grouping.

Other ways of doing it is to loop through the objects and add the grouping results (slow!), or implement something in VEX.

I wish SESI would make the possibility of using intersecting objects for grouping... There are lots of cases where I need it!

[edward]

[quote name='MIguel P

[sibarrick]

Could you attribute transfer an attribute value for the points at the center of the spheres and then put a threshold expression in the group sop to pick points with a non-zero attribute

[MIguel P]

Could you attribute transfer an attribute value for the points at the center of the spheres and then put a threshold expression in the group sop to pick points with a non-zero attribute

I know I can do that, but what I want is to select with random size, and the thresold parameter transfer attributes with uniform radius.

[MADjestic]

Why don't you use polygonal objects, piped through a cookie sop as your bounding object solution?

Edit: oh yeah, I see that you might be using lots of particles. Well - IsoOffset could do the job than, as danielpferreira suggested.

btw, What do you mean, by

select with random size

? Select random values? Select with random threshold? Well - you could equally transfer random valued attributes onto your points of interest and then select them with some, again, randomized expression, no?

rrr

[sibarrick]

If you don't mind getting your hands dirty in vex you could do it with a point cloud and an add poinmt to group combo.