VEX points edge selection issue.

[Vexster]

Hi guys, I have a simple problem that i can't find robust solution for.

 

Using VEX and pcopen, I can select the corner points on a box no problem.

int cornerPointCloud = pcopen(0,"P",@P,1.1,100);
if(pcnumfound(cornerPointCloud)>4)
{    
    setpointgroup(0, "bottomCornerPoints", @ptnum,1, "set");
}

 

 

What I actually want is to be able to select the entire edge, like this. Any idea guys?

[ftaswin]

if(relpointbbox(0,@P)[0]%1==0 && relpointbbox(0,@P)[2]%1==0) @group_edges = 1;