diff options
Diffstat (limited to 'Source/Particles/Pusher/GetAndSetPosition.H')
| -rw-r--r-- | Source/Particles/Pusher/GetAndSetPosition.H | 143 |
1 files changed, 85 insertions, 58 deletions
diff --git a/Source/Particles/Pusher/GetAndSetPosition.H b/Source/Particles/Pusher/GetAndSetPosition.H index 7180f3c55..594260703 100644 --- a/Source/Particles/Pusher/GetAndSetPosition.H +++ b/Source/Particles/Pusher/GetAndSetPosition.H @@ -12,72 +12,99 @@ #include <WarpXParticleContainer.H> #include <AMReX_REAL.H> -#ifndef WARPX_DIM_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::ParticleReal& x, amrex::ParticleReal& y, amrex::ParticleReal& z, - const WarpXParticleContainer::ParticleType& p) +/** \brief Functor that can be used to extract the positions of the macroparticles + * inside a ParallelFor kernel + * + * \param a_pti iterator to the tile containing the macroparticles + * \param a_offset offset to apply to the particle indices +*/ +struct GetParticlePosition { -#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::ParticleReal>::quiet_NaN(); - z = p.pos(1); + using PType = WarpXParticleContainer::ParticleType; + using RType = amrex::ParticleReal; + + const PType* AMREX_RESTRICT m_structs; +#if (defined WARPX_DIM_RZ) + const RType* m_theta; +#elif (AMREX_SPACEDIM == 2) + static constexpr RType m_snan = std::numeric_limits<RType>::quiet_NaN(); #endif -} + GetParticlePosition (const WarpXParIter& a_pti, int a_offset = 0) noexcept + { + const auto& aos = a_pti.GetArrayOfStructs(); + m_structs = aos().dataPtr() + a_offset; +#if (defined WARPX_DIM_RZ) + const auto& soa = a_pti.GetStructOfArrays(); + m_theta = soa.GetRealData(PIdx::theta).dataPtr() + a_offset; +#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::ParticleReal x, const amrex::ParticleReal y, const amrex::ParticleReal z) -{ -#if (AMREX_SPACEDIM==3) - p.pos(0) = x; - p.pos(1) = y; - p.pos(2) = z; + /** \brief Extract the cartesian position coordinates of the particle + * located at index `i + a_offset` and store them in the variables + * `x`, `y`, `z` */ + AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE + void operator() (const int i, RType& x, RType& y, RType& z) const noexcept + { +#ifdef WARPX_DIM_RZ + RType r = m_structs[i].pos(0); + x = r*std::cos(m_theta[i]); + y = r*std::sin(m_theta[i]); + z = m_structs[i].pos(1); +#elif WARPX_DIM_3D + x = m_structs[i].pos(0); + y = m_structs[i].pos(1); + z = m_structs[i].pos(2); #else - p.pos(0) = x; - p.pos(1) = z; + x = m_structs[i].pos(0); + y = m_snan; + z = m_structs[i].pos(1); #endif -} - -# elif defined WARPX_DIM_RZ + } +}; -/** \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::ParticleReal& x, amrex::ParticleReal& y, amrex::ParticleReal& z, - const WarpXParticleContainer::ParticleType& p, const amrex::ParticleReal theta) +/** \brief Functor that can be used to modify the positions of the macroparticles, + * inside a ParallelFor kernel. + * + * \param a_pti iterator to the tile being modified + * \param a_offset offset to apply to the particle indices +*/ +struct SetParticlePosition { - const amrex::ParticleReal r = p.pos(0); - x = r*std::cos(theta); - y = r*std::sin(theta); - z = p.pos(1); -} + using PType = WarpXParticleContainer::ParticleType; + using RType = amrex::ParticleReal; -/** \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::ParticleReal& theta, - const amrex::ParticleReal x, const amrex::ParticleReal y, const amrex::ParticleReal z ) -{ - theta = std::atan2(y, x); - p.pos(0) = std::sqrt(x*x + y*y); - p.pos(1) = z; -} + PType* AMREX_RESTRICT m_structs; +#if (defined WARPX_DIM_RZ) + RType* AMREX_RESTRICT m_theta; +#endif + SetParticlePosition (WarpXParIter& a_pti, int a_offset = 0) noexcept + { + auto& aos = a_pti.GetArrayOfStructs(); + m_structs = aos().dataPtr() + a_offset; +#if (defined WARPX_DIM_RZ) + auto& soa = a_pti.GetStructOfArrays(); + m_theta = soa.GetRealData(PIdx::theta).dataPtr() + a_offset; +#endif + } -#endif // WARPX_DIM_RZ + /** \brief Set the position of the particle at index `i + a_offset` + * to `x`, `y`, `z` */ + AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE + void operator() (const int i, RType x, RType y, RType z) const noexcept + { +#ifdef WARPX_DIM_RZ + m_theta[i] = std::atan2(y, x); + m_structs[i].pos(0) = std::sqrt(x*x + y*y); + m_structs[i].pos(1) = z; +#elif WARPX_DIM_3D + m_structs[i].pos(0) = x; + m_structs[i].pos(1) = y; + m_structs[i].pos(2) = z; +#else + m_structs[i].pos(0) = x; + m_structs[i].pos(1) = z; +#endif + } +}; #endif // WARPX_PARTICLES_PUSHER_GETANDSETPOSITION_H_ |