VEX - delete by attribute

[Juzwa]

Hi, 

 

I've created primitive attributes on most of the pieces of my model. So when it comes to fracturing I can split the geo very fast by attribute.

 

I think it needs to be done in delete SOP, primitives entity, expression or pattern, maybe a foreach. But I'm not sure what is the expression that I need to do that. I tried to set each attribute some value and then use this:

@myAttribute > 0

But It does not work and I know why. I think I need sth like:

if (currentAttribute == @myAttribute)

Edited February 16, 2015 by Juzwa

[Mumble]

If you use a blast node:

@myAttribute > 0 without the spaces "@myAttribute>0" should work.

 

Or if your attribute has also been declared as a variable "$MYATTRIBUTE>0.5" should work in a delete node in the filter expression parameter.

In my experience, using the blast node has much faster results.

[Juzwa]

Thanks! Indeed no spaces in blast sop works well!  This is a bit confusing to me... 

Edited February 16, 2015 by Juzwa

[pbarua]

Reply to original topic (VEX - delete by attribute)

 

VEX solution:

drop down an attribwrangle then enter this code:

if(@myAttribute > 0)
removeprim(geoself(), @primnum, 1); // if you want to delete points owned by primitive itself

or

if(@myAttribute > 0)
removeprim(geoself(), @primnum, 0);

[pbarua]

where

geoself() is first input (geometry itself). You can use input number as well like 0, 1, 2 and3.

Edited February 16, 2015 by Pradeep Barua