Move C++ example to boltzgen_examples repository

2 files changed, 1 insertions, 174 deletions

diff --git a/README.md b/README.md
index 9a7052b..df22b58 100644
--- a/README.md
+++ b/README.md
@@ -54,8 +54,7 @@ optional arguments:
 \                   --layout AOS
 \                   --precision double
 \                   --tau 0.52
-\                   --functions default bounce_back_boundary example
-\                   --extras omp_parallel_for moments_vtk | tee kernel.h
+\                   --functions default bounce_back_boundary | tee kernel.h
 void collide_and_stream(      double* f_next,
                         const double* f_prev,
                         std::size_t gid)
diff --git a/boltzgen/kernel/template/example.cpp.mako b/boltzgen/kernel/template/example.cpp.mako
deleted file mode 100644
index d979bfd..0000000
--- a/boltzgen/kernel/template/example.cpp.mako
+++ /dev/null
@@ -1,172 +0,0 @@
-% if 'moments_vtk' in extras:
-void collect_moments_to_vtk(const std::string& path, ${float_type}* f) {
-    std::ofstream fout;
-    fout.open(path.c_str());
-
-    fout << "# vtk DataFile Version 3.0\n";
-    fout << "lbm_output\n";
-    fout << "ASCII\n";
-    fout << "DATASET RECTILINEAR_GRID\n";
-% if descriptor.d == 2:
-    fout << "DIMENSIONS " << ${geometry.size_x-2} << " " << ${geometry.size_y-2} << " 1" << "\n";
-% else:
-    fout << "DIMENSIONS " << ${geometry.size_x-2} << " " << ${geometry.size_y-2} << " " << ${geometry.size_z-2} << "\n";
-% endif
-
-    fout << "X_COORDINATES " << ${geometry.size_x-2} << " float\n";
-    for( std::size_t x = 1; x < ${geometry.size_x-1}; ++x ) {
-        fout << x << " ";
-    }
-
-    fout << "\nY_COORDINATES " << ${geometry.size_y-2} << " float\n";
-    for( std::size_t y = 1; y < ${geometry.size_y-1}; ++y ) {
-        fout << y << " ";
-    }
-
-% if descriptor.d == 2:
-    fout << "\nZ_COORDINATES " << 1 << " float\n";
-    fout << 0 << "\n";
-    fout << "POINT_DATA " << ${(geometry.size_x-2) * (geometry.size_y-2)} << "\n";
-% else:
-    fout << "\nZ_COORDINATES " << ${geometry.size_z-2} << " float\n";
-    for( std::size_t z = 1; z < ${geometry.size_z-1}; ++z ) {
-        fout << z << " ";
-    }
-    fout << "\nPOINT_DATA " << ${(geometry.size_x-2) * (geometry.size_y-2) * (geometry.size_z-2)} << "\n";
-% endif
-
-    ${float_type} rho;
-    ${float_type} u[${descriptor.d}];
-
-    fout << "VECTORS velocity float\n";
-% if descriptor.d == 2:
-    for ( std::size_t y = 1; y < ${geometry.size_y-1}; ++y ) {
-        for ( std::size_t x = 1; x < ${geometry.size_x-1}; ++x ) {
-            collect_moments(f, x*${geometry.size_y}+y, rho, u);
-            fout << u[0] << " " << u[1] << " 0\n";
-        }
-    }
-% else:
-    for ( std::size_t z = 1; z < ${geometry.size_z-1}; ++z ) {
-        for ( std::size_t y = 1; y < ${geometry.size_y-1}; ++y ) {
-            for ( std::size_t x = 1; x < ${geometry.size_x-1}; ++x ) {
-                collect_moments(f, x*${geometry.size_y*geometry.size_z}+y*${geometry.size_z}+z, rho, u);
-                fout << u[0] << " " << u[1] << " " << u[2] << "\n";
-            }
-        }
-    }
-% endif
-
-    fout << "SCALARS density float 1\n";
-    fout << "LOOKUP_TABLE default\n";
-% if descriptor.d == 2:
-    for ( std::size_t y = 1; y < ${geometry.size_y-1}; ++y ) {
-        for ( std::size_t x = 1; x < ${geometry.size_x-1}; ++x ) {
-            collect_moments(f, x*${geometry.size_y}+y, rho, u);
-            fout << rho << "\n";
-        }
-    }
-% else:
-    for ( std::size_t z = 1; z < ${geometry.size_z-1}; ++z ) {
-        for ( std::size_t y = 1; y < ${geometry.size_y-1}; ++y ) {
-            for ( std::size_t x = 1; x < ${geometry.size_x-1}; ++x ) {
-                collect_moments(f, x*${geometry.size_y*geometry.size_z}+y*${geometry.size_z}+z, rho, u);
-                fout << rho << "\n";
-            }
-        }
-    }
-% endif
-
-    fout.close();
-}
-% endif
-
-void test_ldc(std::size_t nStep)
-{
-    auto f_a = std::make_unique<${float_type}[]>(${geometry.volume*descriptor.q});
-    auto f_b = std::make_unique<${float_type}[]>(${geometry.volume*descriptor.q});
-
-    ${float_type}* f_prev = f_a.get();
-    ${float_type}* f_next = f_b.get();
-
-    std::vector<std::size_t> bulk;
-    std::vector<std::size_t> lid_bc;
-    std::vector<std::size_t> box_bc;
-
-    for (int iX = 1; iX < ${geometry.size_x-1}; ++iX) {
-        for (int iY = 1; iY < ${geometry.size_y-1}; ++iY) {
-% if descriptor.d == 2:
-            const std::size_t iCell = iX*${geometry.size_y} + iY;
-            if (iY == ${geometry.size_y-2}) {
-                lid_bc.emplace_back(iCell);
-            } else if (iX == 1 || iX == ${geometry.size_x-2} || iY == 1) {
-                box_bc.emplace_back(iCell);
-            } else {
-                bulk.emplace_back(iCell);
-            }
-% elif descriptor.d == 3:
-            for (int iZ = 0; iZ < ${geometry.size_z}; ++iZ) {
-                const std::size_t iCell = iX*${geometry.size_y*geometry.size_z} + iY*${geometry.size_z} + iZ;
-                if (iZ == ${geometry.size_z-2}) {
-                    lid_bc.emplace_back(iCell);
-                } else if (iX == 1 || iX == ${geometry.size_x-2} || iY == 1 || iY == ${geometry.size_y-2} || iZ == 1) {
-                    box_bc.emplace_back(iCell);
-                } else {
-                    bulk.emplace_back(iCell);
-                }
-            }
-% endif
-        }
-    }
-
-    for (std::size_t iCell = 0; iCell < ${geometry.volume}; ++iCell) {
-        equilibrilize(f_prev, f_next, iCell);
-    }
-
-    const auto start = std::chrono::high_resolution_clock::now();
-
-    for (std::size_t iStep = 0; iStep < nStep; ++iStep) {
-        if (iStep % 2 == 0) {
-            f_next = f_a.get();
-            f_prev = f_b.get();
-        } else {
-            f_next = f_b.get();
-            f_prev = f_a.get();
-        }
-
-% if 'omp_parallel_for' in extras:
-#pragma omp parallel for
-% endif
-        for (std::size_t i = 0; i < bulk.size(); ++i) {
-            collide_and_stream(f_next, f_prev, bulk[i]);
-        }
-        ${float_type} u[${descriptor.d}] { 0. };
-% if 'omp_parallel_for' in extras:
-#pragma omp parallel for
-% endif
-        for (std::size_t i = 0; i < box_bc.size(); ++i) {
-            velocity_momenta_boundary(f_next, f_prev, box_bc[i], u);
-        }
-        u[0] = 0.05;
-% if 'omp_parallel_for' in extras:
-#pragma omp parallel for
-% endif
-        for (std::size_t i = 0; i < lid_bc.size(); ++i) {
-            velocity_momenta_boundary(f_next, f_prev, lid_bc[i], u);
-        }
-    }
-
-    auto duration = std::chrono::duration_cast<std::chrono::duration<double>>(
-        std::chrono::high_resolution_clock::now() - start);
-
-    std::cout << "#bulk   : " << bulk.size()   << std::endl;
-    std::cout << "#lid    : " << lid_bc.size() << std::endl;
-    std::cout << "#wall   : " << box_bc.size() << std::endl;
-    std::cout << "#steps  : " << nStep         << std::endl;
-    std::cout << std::endl;
-    std::cout << "MLUPS   : " << nStep*${geometry.volume}/(1e6*duration.count()) << std::endl;
-
-% if 'moments_vtk' in extras:
-    collect_moments_to_vtk("test.vtk", f_next);
-% endif
-}