Hi!

I would like to have 2 scatters of 20 points each and connect the point1 of the first scatter to the point1 of the second, etc.

I have placed a simple wrangle after each scatter to keep the the info of the point number even after I merge both scatters:

i@myptnum = i@ptnum;

The problem is I don't know how to use @myptnum to connect all 20 polylines.

Any help is appreciated!

-Olivier

append Add SOP

set Polygons/By Group/Add to By Attribute
and put myptnum as Attrib Name

it will connect all points with the same attrib, so if you have unique myptnum values on the left points and the same values in any order on the right points it will draw lines connecting those pairs of points

Ah! Simple solution!

Again, thanks for all your help, tamte!

-Olivier

Oh and, once I've got a bunch of lines and I subdivide them to have a mid point on each line, how do I select only the middle point of each line? Is using a For each a good idea? Is there an easier/faster to process method?

-Olivier

Ah! Found it!

I used the neighbourcount function:



i@group_mid = 0;

i@neigh = neighbourcount(0, @ptnum);



if(@neigh == 2)
{
@group_mid = 1;
}

if you want you can simplify that into a one liner (if you don't really need i@neigh as an attribute)

Forgot about this old post!

Thanks.

-Olivier