Tnx for the comment guys.
I'm still deciding if i want to traceline a path or define hotspot and let the Mesh decide the connected triangle that bring you there, i like the second idea more, what do you think?
I wish they were related but deturing the mapfile is to much for me actually, the mesh is related to your x,y,z nothing else. Also this is a 2d representation that only store the z coord to be able later to decide if we can walk it.
I wish i can use recastnavigation, but i'm not that level.
/bow