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#include "lattice.h"
#include "LLBM/collide.h"
#include "LLBM/initialize.h"
#include "LLBM/bounce_back.h"
#include <chrono>
#include <iostream>
#include "pattern/all.h"
using T = SWEEPLB_PRECISION;
using PATTERN = pattern::SWEEPLB_PATTERN<T>;
void simulate(Cuboid cuboid, std::size_t nStep) {
const int nThread = omp_get_max_threads();
Lattice<PATTERN> lattice(cuboid);
std::vector<simd::Pack<T>::index_t> discontinuity;
LatticeMask<T> bulk_mask(lattice.volume());
LatticeMask<T> wall_mask(lattice.volume());
cuboid.traverse([&](int iX, int iY, int iZ, std::size_t iCell) {
if (std::abs(iX - cuboid[0]/2) < cuboid[0]/16 &&
std::abs(iY - cuboid[1]/2) < cuboid[1]/16 &&
std::abs(iZ - cuboid[2]/2) < cuboid[2]/16) {
discontinuity.emplace_back(iCell);
}
if ( iX > 0 && iX < cuboid[0]-1
&& iY > 0 && iY < cuboid[1]-1
&& iZ > 0 && iZ < cuboid[2]-1) {
bulk_mask.set(iCell, true);
} else {
wall_mask.set(iCell, true);
}
});
bulk_mask.serialize();
wall_mask.serialize();
lattice.apply<InitializeO>(discontinuity, 2.0);
T tau = 0.56;
auto start = std::chrono::steady_clock::now();
for (std::size_t iStep = 0; iStep < nStep; ++iStep) {
lattice.apply(Operator(BgkCollideO(), bulk_mask, tau),
Operator(BounceBackO(), wall_mask));
lattice.stream();
}
auto duration = std::chrono::duration_cast<std::chrono::duration<double>>(
std::chrono::steady_clock::now() - start);
std::cout << cuboid[0]
<< ", " << nStep
<< ", " << nThread
<< ", " << (nStep * lattice.volume()) / (1e6 * duration.count())
<< std::endl;
lattice.write_momenta(bulk_mask, "result.vtk");
}
int main(int argc, char* argv[]) {
const std::size_t nX = atoi(argv[1]);
const std::size_t nY = atoi(argv[2]);
const std::size_t nZ = atoi(argv[3]);
const std::size_t steps = atoi(argv[4]);
simulate({ nX, nY, nZ }, steps);
}
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