[Gmsh] gmsh/bamg

[trophime]

Hi
I would like tu use bamg algo to get an anisotropic mesh.
I wish to use a metric as a background mesh and generate the
anistropic mesh from it :

gmsh -2 geofile  -algo bamg -bgm metrics.pos

Is this correct or shall I just past the solution as the bgm
so that bamg creates the metrics for this solution? In this case howto
pass proper parameters to bamg?

Thanks for any hints
C

PS: in the case of 3D can I also use a metric as a bgm with -algo
mmg3d?