simple points iteration

[mutlu]

Hi guys,

I am a newbie, and I have a problem (duh  )

I got 2 connections to my attribute wrangler, both have id attribute, and I am trying to match the id attributes and then if yes, I will transfer the @P

I am writing something like this but I just can't iterate between all the points.

 

foreach(all the points in @OpInput1)
{
    foreach(all the points in @OpInput2)
    {
        if (@id == point(@OpInput2,"id",@ptnum))
        {
            @P = point(@OpInput2,"P",@ptnum);
        }
    }
}

I am sure it is so simple but like I said, I am learning

Thanks so much!

[holycause]

int match = findattribval(1, "point", "id", @id);

if(match!=-1) @P = point(1, "P", match);

use the findattribval function it does exactly that

it returns the first point number with the corresponding value and -1 if it doesn't find it

Edited September 15, 2016 by holycause

[mutlu]

Worked like a charm my friend. Thank you.

Still, I also like to learn an easy way to iterate between all the points... something like foreach(all the points in @OpInput1)

Also, can i ask one more thing?
How can I sort ptnum according to id attribute? (you know ptnums change but attribute stays the same, I used blast on a geo and parted to multiple pieces, and now getting all back together, and I want them to have the old exact ptnum, which id attribute holds)

Thanks!

[MrScienceOfficer]

8 hours ago, mutlu said:

Still, I also like to learn an easy way to iterate between all the points... something like foreach(all the points in @OpInput1)

If you set the wrangle node to "point", it will of course do this implicitly otherwise I think  " for(int pt_num = 0; pt_num < npoints(0); ++pt_num) " is the only way.

 

8 hours ago, mutlu said:

How can I sort ptnum according to id attribute?

You can use a sort sop set to attribute to do this, however it will only order the points, if you remove any points you won't be able to restore the point numbers as you can't have missing point numbers.  

[mutlu]

Thank you Tom, sort sop works like a charm! I have seen that in another topic and already used it: sort sop, point sort: by attribute, attribute: id

regards

[MrScienceOfficer]

No problem