1 files changed, 76 insertions, 0 deletions
diff --git a/Source/Particles/Pusher/GetAndSetPosition.H b/Source/Particles/Pusher/GetAndSetPosition.H
new file mode 100644
index 000000000..42c61343e
--- /dev/null
+++ b/Source/Particles/Pusher/GetAndSetPosition.H
@@ -0,0 +1,76 @@
+#ifndef WARPX_PARTICLES_PUSHER_GETANDSETPOSITION_H_
+#define WARPX_PARTICLES_PUSHER_GETANDSETPOSITION_H_
+
+#include <limits>
+#include <WarpXParticleContainer.H>
+#include <AMReX_REAL.H>
+
+#ifndef WARPX_RZ
+
+/* \brief Extract the particle's coordinates from the ParticleType struct `p`,
+ *        and stores them in the variables `x`, `y`, `z`. */
+AMREX_GPU_HOST_DEVICE AMREX_INLINE
+void GetPosition(
+    amrex::Real& x, amrex::Real& y, amrex::Real& z,
+    const WarpXParticleContainer::ParticleType& p)
+{
+#if (AMREX_SPACEDIM==3)
+    x = p.pos(0);
+    y = p.pos(1);
+    z = p.pos(2);
+#else
+    x = p.pos(0);
+    y = std::numeric_limits<amrex::Real>::quiet_NaN();
+    z = p.pos(1);
+#endif
+}
+
+/* \brief Set the particle's coordinates in the ParticleType struct `p`,
+ *        from their values in the variables `x`, `y`, `z`. */
+AMREX_GPU_HOST_DEVICE AMREX_INLINE
+void SetPosition(
+    WarpXParticleContainer::ParticleType& p,
+    const amrex::Real x, const amrex::Real y, const amrex::Real z)
+{
+#if (AMREX_SPACEDIM==3)
+    p.pos(0) = x;
+    p.pos(1) = y;
+    p.pos(2) = z;
+#else
+    p.pos(0) = x;
+    p.pos(1) = z;
+#endif
+}
+
+# else // if WARPX_RZ is True
+
+/* \brief Extract the particle's coordinates from `theta` and the attributes
+ *         of the ParticleType struct `p` (which contains the radius),
+ *         and store them in the variables `x`, `y`, `z` */
+AMREX_GPU_HOST_DEVICE AMREX_INLINE
+void GetCartesianPositionFromCylindrical(
+    amrex::Real& x, amrex::Real& y, amrex::Real& z,
+    const WarpXParticleContainer::ParticleType& p, const amrex::Real theta)
+{
+    const amrex::Real r = p.pos(0);
+    x = r*std::cos(theta);
+    y = r*std::sin(theta);
+    z = p.pos(1);
+}
+
+/* \brief Set the particle's cylindrical coordinates by setting `theta`
+ *        and the attributes of the ParticleType struct `p` (which stores the radius),
+ *        from the values of `x`, `y`, `z` */
+AMREX_GPU_HOST_DEVICE AMREX_INLINE
+void SetCylindricalPositionFromCartesian(
+    WarpXParticleContainer::ParticleType& p, amrex::Real& theta,
+    const amrex::Real x, const amrex::Real y, const amrex::Real z )
+{
+    theta = std::atan2(y, x);
+    p.pos(0) = std::sqrt(x*x + y*y);
+    p.pos(1) = z;
+}
+
+#endif // WARPX_RZ
+
+#endif // WARPX_PARTICLES_PUSHER_GETANDSETPOSITION_H_