1 files changed, 73 insertions, 0 deletions
diff --git a/box.cpp b/box.cpp
new file mode 100644
index 0000000..ecb3296
--- /dev/null
+++ b/box.cpp
@@ -0,0 +1,73 @@
+#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);
+}