okay i have uploaded a source file update and
a demonstration of what im busy with at this moment
this demo shows how i take models from wed and merge
them into one mesh then builds a navmesh from that mesh.
recast will add/subtract them automatic so here i show
that i can merge 2 planes to form a navmesh and add to that mesh
a bunch of other meshes witch forms static obsticles as they cut
theire shape from the other meshes when build into a navmesh.
oh yeah theres no height taken into account on the navmesh because i made
it flat(planes)

at this moment scale and position is taken into account but no rotation yet
also instead of creating a navmesh by pieces it could simply be created
from your modelling software and added to wed and then build in sed
this eliminates the issue of being restricted to the geometry i could
pass into recast because i had to acces blocks/hmp but couldnt get
it rite yet ,this also improves speed because recast doesnt need
to go through a whole level mdl model and add triangles/vertices
thats anyway going to get removed again ...