[petsc-users] An question about DMPlexReconstructGradientsFVM

[leejearl]

Hi all，

    I have an problem of using the routine PetscErrorCode 
DMPlexReconstructGradientsFVM(DM dm, Vec locX, Vec grad).

I do not understant the parameters in the function. Can anyone help me 
with the examples of this routine? I have test many times, and I

still can not understand how to get the parameters dm, locX, and grad.

    Thanks.

leejearl