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.cpp b/Source/FieldSolver/FiniteDifferenceSolver/FiniteDifferenceSolver.cpp
index e8529ef15..a65d86b8f 100644
--- a/Source/FieldSolver/FiniteDifferenceSolver/FiniteDifferenceSolver.cpp
+++ b/Source/FieldSolver/FiniteDifferenceSolver/FiniteDifferenceSolver.cpp
@@ -30,11 +30,11 @@
 FiniteDifferenceSolver::FiniteDifferenceSolver (
     int const fdtd_algo,
     std::array<amrex::Real,3> cell_size,
-    bool do_nodal ) {
+    short grid_type) {
 
     // Register the type of finite-difference algorithm
     m_fdtd_algo = fdtd_algo;
-    m_do_nodal = do_nodal;
+    m_grid_type = grid_type;
 
     // return if not FDTD
     if (fdtd_algo == ElectromagneticSolverAlgo::None || fdtd_algo == ElectromagneticSolverAlgo::PSATD)
@@ -62,7 +62,7 @@ FiniteDifferenceSolver::FiniteDifferenceSolver (
             "FiniteDifferenceSolver: Unknown algorithm"));
     }
 #else
-    if (do_nodal) {
+    if (grid_type == GridType::Collocated) {
 
         CartesianNodalAlgorithm::InitializeStencilCoefficients( cell_size,
             m_h_stencil_coefs_x, m_h_stencil_coefs_y, m_h_stencil_coefs_z );