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#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_
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