Group hard edges

[papsphilip]

I am trying to groups the hard edges of a model like the one you see in the attached image but it seems weirdly difficult. I am sure there is an easy way to do this

 

group_hard_edges.hip

Edited March 11, 2022 by papsphilip

[Librarian]

@papsphilip if you just somehow change your approach to model that roof... or ?

you can use this code.. to take points and promote to edge group..
its messy inside that HIp ..

string group_name = chs('group_name');
vector src_dir = chv('direction');
float treshold = chf('tresh');
int nb_pts[] = neighbours(0,@ptnum);
foreach ( int pt; nb_pts)
{
    if (@ptnum > pt) continue;
    vector pos = point(0,'P',pt);
    vector edge_dir = normalize(@P -pos);
    if(abs(dot(edge_dir, src_dir)) >=  treshold)
    {
        setedgegroup(0,group_name,@ptnum,pt,1);
     }
}

 

[papsphilip]

nice! i tried your code unfortunately this wont work, i already some wrangles for grouping based on the angle between the edges and get only vertical or horizontal edges or anything in between but i cant seem to get the highlighted edges i am showing in the attached images. Or did i not understand something correctly? maybe i have to generate the mesh some other way to get those edges.

[Librarian]

@papsphilip Your first resample its making error  in Boolean op....
and you have floating points and prim's after for-each .now after zero in resampling you get those  Groups Clean with no errors.
 

edges.hiplc

[papsphilip]

thank you!!