1 files changed, 46 insertions, 0 deletions
diff --git a/Source/Particles/Gather/GetExternalFields.cpp b/Source/Particles/Gather/GetExternalFields.cpp
new file mode 100644
index 000000000..6e4eb6d1b
--- /dev/null
+++ b/Source/Particles/Gather/GetExternalFields.cpp
@@ -0,0 +1,46 @@
+#include "WarpX.H"
+#include "Particles/Gather/GetExternalFields.H"
+
+GetExternalEField::GetExternalEField (const WarpXParIter& a_pti, int a_offset) noexcept
+{
+    auto& warpx = WarpX::GetInstance();
+    auto& mypc = warpx.GetPartContainer();
+    if (mypc.m_E_ext_particle_s=="constant" || mypc.m_E_ext_particle_s=="default")
+    {
+        m_type = Constant;
+        m_field_value[0] = mypc.m_E_external_particle[0];
+        m_field_value[1] = mypc.m_E_external_particle[1];
+        m_field_value[2] = mypc.m_E_external_particle[2];
+    }
+    else if (mypc.m_E_ext_particle_s=="parse_e_ext_particle_function")
+    {
+        m_type = Parser;
+        m_time = warpx.gett_new(a_pti.GetLevel());
+        m_get_position = GetParticlePosition(a_pti, a_offset);
+        m_xfield_partparser = mypc.m_Ex_particle_parser.get();
+        m_yfield_partparser = mypc.m_Ey_particle_parser.get();
+        m_zfield_partparser = mypc.m_Ez_particle_parser.get();
+    }
+}
+
+GetExternalBField::GetExternalBField (const WarpXParIter& a_pti, int a_offset) noexcept
+{
+    auto& warpx = WarpX::GetInstance();
+    auto& mypc = warpx.GetPartContainer();
+    if (mypc.m_B_ext_particle_s=="constant" || mypc.m_B_ext_particle_s=="default")
+    {
+        m_type = Constant;
+        m_field_value[0] = mypc.m_B_external_particle[0];
+        m_field_value[1] = mypc.m_B_external_particle[1];
+        m_field_value[2] = mypc.m_B_external_particle[2];
+    }
+    else if (mypc.m_B_ext_particle_s=="parse_e_ext_particle_function")
+    {
+        m_type = Parser;
+        m_time = warpx.gett_new(a_pti.GetLevel());
+        m_get_position = GetParticlePosition(a_pti, a_offset);
+        m_xfield_partparser = mypc.m_Bx_particle_parser.get();
+        m_yfield_partparser = mypc.m_By_particle_parser.get();
+        m_zfield_partparser = mypc.m_Bz_particle_parser.get();
+    }
+}