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/* Copyright 2021 Andrew Myers
*
* This file is part of WarpX.
*
* License: BSD-3-Clause-LBNL
*/
#include "EmbeddedBoundary/DistanceToEB.H"
#include "Particles/ParticleBoundaryBuffer.H"
#include "Particles/MultiParticleContainer.H"
#include "Particles/Gather/ScalarFieldGather.H"
#include <AMReX_Geometry.H>
#include <AMReX_ParmParse.H>
struct IsOutsideDomainBoundary {
amrex::GpuArray<amrex::Real, AMREX_SPACEDIM> m_plo;
amrex::GpuArray<amrex::Real, AMREX_SPACEDIM> m_phi;
int m_idim;
int m_iside;
template <typename SrcData>
AMREX_GPU_DEVICE AMREX_FORCE_INLINE
int operator() (const SrcData& src,
int ip, const amrex::RandomEngine& /*engine*/) const noexcept
{
const auto& p = src.getSuperParticle(ip);
if (m_iside == 0) {
if (p.pos(m_idim) < m_plo[m_idim]) { return 1; }
} else {
if (p.pos(m_idim) >= m_phi[m_idim]) { return 1; }
}
return 0;
}
};
struct CopyAndTimestamp {
int m_index;
int m_step;
template <typename DstData, typename SrcData>
AMREX_GPU_HOST_DEVICE
void operator() (const DstData& dst, const SrcData& src,
int src_i, int dst_i) const noexcept
{
dst.m_aos[dst_i] = src.m_aos[src_i];
for (int j = 0; j < SrcData::NAR; ++j)
dst.m_rdata[j][dst_i] = src.m_rdata[j][src_i];
for (int j = 0; j < src.m_num_runtime_real; ++j)
dst.m_runtime_rdata[j][dst_i] = src.m_runtime_rdata[j][src_i];
for (int j = 0; j < src.m_num_runtime_int; ++j)
dst.m_runtime_idata[j][dst_i] = src.m_runtime_idata[j][src_i];
dst.m_runtime_idata[m_index][dst_i] = m_step;
}
};
ParticleBoundaryBuffer::ParticleBoundaryBuffer ()
{
m_particle_containers.resize(numBoundaries());
m_do_boundary_buffer.resize(numBoundaries());
for (int i = 0; i < numBoundaries(); ++i)
{
m_particle_containers[i].resize(numSpecies());
m_do_boundary_buffer[i].resize(numSpecies(), 0);
}
for (int ispecies = 0; ispecies < numSpecies(); ++ispecies)
{
amrex::ParmParse pp_species(getSpeciesNames()[ispecies]);
pp_species.query("save_particles_at_xlo", m_do_boundary_buffer[0][ispecies]);
pp_species.query("save_particles_at_xhi", m_do_boundary_buffer[1][ispecies]);
#if AMREX_SPACEDIM == 2
pp_species.query("save_particles_at_zlo", m_do_boundary_buffer[2][ispecies]);
pp_species.query("save_particles_at_zhi", m_do_boundary_buffer[3][ispecies]);
#else
pp_species.query("save_particles_at_ylo", m_do_boundary_buffer[2][ispecies]);
pp_species.query("save_particles_at_yhi", m_do_boundary_buffer[3][ispecies]);
pp_species.query("save_particles_at_zlo", m_do_boundary_buffer[4][ispecies]);
pp_species.query("save_particles_at_zhi", m_do_boundary_buffer[5][ispecies]);
#endif
#ifdef AMREX_USE_EB
pp_species.query("save_particles_at_eb", m_do_boundary_buffer[AMREX_SPACEDIM*2][ispecies]);
#endif
}
}
void ParticleBoundaryBuffer::printNumParticles () const {
for (int idim = 0; idim < AMREX_SPACEDIM; ++idim)
{
for (int iside = 0; iside < 2; ++iside)
{
auto& buffer = m_particle_containers[2*idim+iside];
for (int i = 0; i < numSpecies(); ++i)
{
int np = buffer[i].isDefined() ? buffer[i].TotalNumberOfParticles(false) : 0;
amrex::Print() << "Species " << getSpeciesNames()[i] << " has "
<< np << " particles in the boundary buffer "
<< " for side " << iside << " of dim " << idim << "\n";
}
}
}
#ifdef AMREX_USE_EB
auto& buffer = m_particle_containers[2*AMREX_SPACEDIM];
for (int i = 0; i < numSpecies(); ++i)
{
int np = buffer[i].isDefined() ? buffer[i].TotalNumberOfParticles(false) : 0;
amrex::Print() << "Species " << getSpeciesNames()[i] << " has "
<< np << " particles in the EB boundary buffer \n";
}
#endif
}
void ParticleBoundaryBuffer::clearParticles () {
for (int i = 0; i < numBoundaries(); ++i)
{
auto& buffer = m_particle_containers[i];
for (int ispecies = 0; ispecies < numSpecies(); ++ispecies)
{
auto& species_buffer = buffer[ispecies];
if (species_buffer.isDefined()) species_buffer.clearParticles();
}
}
}
void ParticleBoundaryBuffer::gatherParticles (MultiParticleContainer& mypc,
const amrex::Vector<const amrex::MultiFab*>& distance_to_eb)
{
using PIter = amrex::ParConstIter<0,0,PIdx::nattribs>;
const auto& warpx_instance = WarpX::GetInstance();
const amrex::Geometry& geom = warpx_instance.Geom(0);
auto plo = geom.ProbLoArray();
auto phi = geom.ProbHiArray();
auto dxi = geom.InvCellSizeArray();
for (int idim = 0; idim < AMREX_SPACEDIM; ++idim)
{
if (geom.isPeriodic(idim)) continue;
for (int iside = 0; iside < 2; ++iside)
{
auto& buffer = m_particle_containers[2*idim+iside];
for (int i = 0; i < numSpecies(); ++i)
{
if (!m_do_boundary_buffer[2*idim+iside][i]) continue;
const auto& pc = mypc.GetParticleContainer(i);
if (!buffer[i].isDefined())
{
buffer[i] = ParticleBuffer::getTmpPC<amrex::PinnedArenaAllocator>(&pc);
buffer[i].AddIntComp(false); // for timestamp
}
auto& species_buffer = buffer[i];
for (int lev = 0; lev < pc.numLevels(); ++lev)
{
const auto& plevel = pc.GetParticles(lev);
for(PIter pti(pc, lev); pti.isValid(); ++pti)
{
auto index = std::make_pair(pti.index(), pti.LocalTileIndex());
if(plevel.find(index) == plevel.end()) continue;
auto& ptile_buffer = species_buffer.DefineAndReturnParticleTile(
lev, pti.index(), pti.LocalTileIndex());
const auto& ptile = plevel.at(index);
auto np = ptile.numParticles();
if (np == 0) continue;
auto dst_index = ptile_buffer.numParticles();
ptile_buffer.resize(dst_index + np);
int timestamp_index = ptile_buffer.NumRuntimeIntComps()-1;
int timestep = warpx_instance.getistep(0);
auto count = amrex::filterAndTransformParticles(ptile_buffer, ptile,
IsOutsideDomainBoundary{plo, phi, idim, iside},
CopyAndTimestamp{timestamp_index, timestep},
0, dst_index);
ptile_buffer.resize(dst_index + count);
}
}
}
}
}
#ifdef AMREX_USE_EB
auto& buffer = m_particle_containers[m_particle_containers.size()-1];
for (int i = 0; i < numSpecies(); ++i)
{
const auto& pc = mypc.GetParticleContainer(i);
if (!buffer[i].isDefined())
{
buffer[i] = ParticleBuffer::getTmpPC<amrex::PinnedArenaAllocator>(&pc);
buffer[i].AddIntComp(false); // for timestamp
}
auto& species_buffer = buffer[i];
for (int lev = 0; lev < pc.numLevels(); ++lev)
{
const auto& plevel = pc.GetParticles(lev);
for(PIter pti(pc, lev); pti.isValid(); ++pti)
{
auto phiarr = (*distance_to_eb[lev])[pti].array(); // signed distance function
auto index = std::make_pair(pti.index(), pti.LocalTileIndex());
if(plevel.find(index) == plevel.end()) continue;
const auto getPosition = GetParticlePosition(pti);
auto& ptile_buffer = species_buffer.DefineAndReturnParticleTile(lev, pti.index(),
pti.LocalTileIndex());
const auto& ptile = plevel.at(index);
auto np = ptile.numParticles();
if (np == 0) continue;
auto dst_index = ptile_buffer.numParticles();
ptile_buffer.resize(dst_index + np);
int timestamp_index = ptile_buffer.NumRuntimeIntComps()-1;
int timestep = warpx_instance.getistep(0);
using SrcData = WarpXParticleContainer::ParticleTileType::ConstParticleTileDataType;
auto count = amrex::filterAndTransformParticles(ptile_buffer, ptile,
[=] AMREX_GPU_HOST_DEVICE (const SrcData& /*src*/, const int ip) noexcept
{
amrex::ParticleReal xp, yp, zp;
getPosition(ip, xp, yp, zp);
amrex::Real phi_value = doGatherScalarFieldNodal(
xp, yp, zp, phiarr, dxi, plo
);
return phi_value < 0.0 ? 1 : 0;
},
CopyAndTimestamp{timestamp_index, timestep}, 0, dst_index);
ptile_buffer.resize(dst_index + count);
}
}
}
#else
amrex::ignore_unused(distance_to_eb, dxi);
#endif
}
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