merged hierarchies interpolations results in spurious values about phare HOT 2 OPEN

Ok, plotting the data of the patch aove also gives :

I think the error is that I don't calculate the ghosts of my pressure diag.
However, there is in flat_finest_field_2d :

           # all but 1 ghost nodes are removed in order to limit
           # the overlapping, but to keep enough point to avoid
           # any extrapolation for the interpolator
           needed_points = pdata.ghosts_nbr - 1

It's possible somehow the interpolator keeps the value of the one ghost from the right patch instead of the domain value of the left one.

from phare.

we should figure out how to tell the interpolator not to learn from ghost values.

from phare.