New user input for grid type (collocated, staggered, hybrid) (#3683)

* Introduce `warpx.grid_type` parameter

* Replace `or` with `||`

* Update examples with new user input syntax

* Fix `if` condition

* Improve error message

* Fix `if` condition

* Fix bugs

* Fix warning

* Fix RZ

* Debugging

* Fix RZ

* Fix bug

* Clean up

* More changes:

- set default algo parameters with hybrid grid
- all hybrid input parameters under warpx name

* Set default field gathering algo for hybrid grids

* Update documentation

1 files changed, 3 insertions, 3 deletions

diff --git a/Source/FieldSolver/FiniteDifferenceSolver/FiniteDifferenceSolver.H b/Source/FieldSolver/FiniteDifferenceSolver/FiniteDifferenceSolver.H
index ed6f918b3..aecf4ed9e 100644
--- a/Source/FieldSolver/FiniteDifferenceSolver/FiniteDifferenceSolver.H
+++ b/Source/FieldSolver/FiniteDifferenceSolver/FiniteDifferenceSolver.H
@@ -39,12 +39,12 @@ class FiniteDifferenceSolver
          *
          * \param fdtd_algo Identifies the chosen algorithm, as defined in WarpXAlgorithmSelection.H
          * \param cell_size Cell size along each dimension, for the chosen refinement level
-         * \param do_nodal  Whether the solver is applied to a nodal or staggered grid
+         * \param grid_type Whether the solver is applied to a collocated or staggered grid
          */
         FiniteDifferenceSolver (
             int const fdtd_algo,
             std::array<amrex::Real,3> cell_size,
-            bool const do_nodal );
+            short const grid_type );
 
         void EvolveB ( std::array< std::unique_ptr<amrex::MultiFab>, 3 >& Bfield,
                        std::array< std::unique_ptr<amrex::MultiFab>, 3 > const& Efield,
@@ -132,7 +132,7 @@ class FiniteDifferenceSolver
     private:
 
         int m_fdtd_algo;
-        bool m_do_nodal;
+        short m_grid_type;
 
 #ifdef WARPX_DIM_RZ
         amrex::Real m_dr, m_rmin;