--- /dev/null
+//----------------------------------------------------------------------------
+// $Id$
+// Version: $Name$
+//
+// Copyright (C) 2000 - 2007 by the deal.II authors
+//
+// This file is subject to QPL and may not be distributed
+// without copyright and license information. Please refer
+// to the file deal.II/doc/license.html for the text and
+// further information on this license.
+//
+//----------------------------------------------------------------------------
+
+// Compare MGTransferPrebuilt, MGTransferBlock and MGTransferSelect
+
+#include "../tests.h"
+#include <base/logstream.h>
+#include <lac/vector.h>
+#include <lac/block_vector.h>
+#include <grid/tria.h>
+#include <grid/grid_generator.h>
+#include <dofs/dof_renumbering.h>
+#include <dofs/dof_tools.h>
+#include <fe/fe_dgp.h>
+#include <fe/fe_dgq.h>
+#include <fe/fe_q.h>
+#include <fe/fe_raviart_thomas.h>
+#include <fe/fe_system.h>
+#include <multigrid/mg_dof_handler.h>
+#include <multigrid/mg_transfer.h>
+#include <multigrid/mg_transfer_block.h>
+#include <multigrid/mg_tools.h>
+#include <multigrid/mg_level_object.h>
+
+#include <fstream>
+#include <iostream>
+#include <iomanip>
+#include <algorithm>
+
+using namespace std;
+
+template <int dim>
+void check_block(const FiniteElement<dim>& fe)
+{
+ deallog << fe.get_name() << std::endl;
+ std::vector<bool> selected(fe.n_blocks(), true);
+
+ Triangulation<dim> tr;
+ GridGenerator::hyper_cube(tr);
+ tr.refine_global(2);
+
+ MGDoFHandler<dim> mgdof(tr);
+ DoFHandler<dim>& dof=mgdof;
+ mgdof.distribute_dofs(fe);
+
+ // Make sure all orderings are the
+ // same
+ Point<dim> direction;
+ for (unsigned int d=0;d<dim;++d)
+ direction[d] = d*d*d;
+ DoFRenumbering::downstream(dof, direction);
+ DoFRenumbering::component_wise(dof);
+ for (unsigned int l=0;l<tr.n_levels();++l)
+ {
+ DoFRenumbering::downstream(mgdof, l, direction);
+ DoFRenumbering::component_wise(mgdof, l);
+ }
+
+ // Store sizes
+ vector<unsigned int> ndofs(fe.n_blocks());
+ DoFTools::count_dofs_per_block(mgdof, ndofs);
+ std::vector<std::vector<unsigned int> > mg_ndofs(mgdof.get_tria().n_levels());
+ MGTools::count_dofs_per_block(mgdof, mg_ndofs);
+
+ MGTransferPrebuilt<BlockVector<double> > transfer;
+ MGTransferBlock<double> transfer_block;
+ MGTransferBlockSelect<double> transfer_select;
+ transfer.build_matrices(mgdof);
+ transfer_block.build_matrices(dof, mgdof, selected);
+ transfer_select.build_matrices(dof, mgdof, 0);
+
+ BlockVector<double> u2(mg_ndofs[2]);
+ BlockVector<double> u1(mg_ndofs[1]);
+ BlockVector<double> u0(mg_ndofs[0]);
+ BlockVector<double> v2(mg_ndofs[2]);
+ BlockVector<double> v1(mg_ndofs[1]);
+ BlockVector<double> v0(mg_ndofs[0]);
+
+ // Prolongate a constant function
+ // twice
+ u0 = 1;
+ transfer.prolongate(1,u1,u0);
+ transfer.prolongate(2,u2,u1);
+ v0 = 1;
+ transfer_block.prolongate(1,v1,v0);
+ transfer_block.prolongate(2,v2,v1);
+ v0.add(-1., u0);
+ v1.add(-1., u1);
+ v2.add(-1., u2);
+ // These outputs are just the
+ // number of dofs on each level
+ deallog << "Prolongate " << v0.l2_norm()
+ << ' ' << v1.l2_norm()
+ << ' ' << v2.l2_norm()
+ << std::endl;
+
+ v0 = 1.;
+ transfer_select.prolongate(1,v1.block(0),v0.block(0));
+ transfer_select.prolongate(2,v2.block(0),v1.block(0));
+ v0.add(-1., u0);
+ v1.add(-1., u1);
+ v2.add(-1., u2);
+ deallog << "Select " << v0.block(0).l2_norm()
+ << ' ' << v1.block(0).l2_norm()
+ << ' ' << v2.block(0).l2_norm()
+ << std::endl;
+
+ v2 = u2;
+ u1 = 0.;
+ u0 = 0.;
+ transfer.restrict_and_add(2,u1,u2);
+ transfer.restrict_and_add(1,u0,u1);
+ v1 = 0.;
+ v0 = 0.;
+ transfer_block.restrict_and_add(2,v1,v2);
+ transfer_block.restrict_and_add(1,v0,v1);
+ v0.add(-1., u0);
+ v1.add(-1., u1);
+ deallog << "Restrict " << v0.l2_norm()
+ << ' ' << v1.l2_norm()
+ << std::endl;
+
+ v1 = 0.;
+ v0 = 0.;
+ transfer_select.restrict_and_add(2,v1.block(0),v2.block(0));
+ transfer_select.restrict_and_add(1,v0.block(0),v1.block(0));
+ v0.add(-1., u0);
+ v1.add(-1., u1);
+ deallog << "Select " << v0.block(0).l2_norm()
+ << ' ' << v1.block(0).l2_norm()
+ << std::endl;
+
+
+ // Check copy to mg and back
+ BlockVector<double> u;
+ u.reinit (ndofs);
+ for (unsigned int i=0;i<u.size();++i)
+ u(i) = i+1;
+
+ std::vector<std::vector<unsigned int> > cached_sizes;
+ MGLevelObject<BlockVector<double> > v;
+ MGLevelObject<BlockVector<double> > w;
+ v.resize(0, tr.n_levels()-1);
+ w.resize(0, tr.n_levels()-1);
+ MGTools::reinit_vector_by_blocks(mgdof, v, selected, cached_sizes);
+ MGTools::reinit_vector_by_blocks(mgdof, w, selected, cached_sizes);
+
+ deallog << "copy to mg";
+ transfer.copy_to_mg(mgdof, v, u);
+ transfer_block.copy_to_mg(mgdof, w, u);
+
+ for (unsigned int l=0; l<tr.n_levels();++l)
+ {
+ w[l].add(-1., v[l]);
+ deallog << ' ' << w[l].l2_norm();
+ }
+ deallog << std::endl << "copy from mg ";
+ // Now do the opposite: fill a
+ // multigrid vector counting the
+ // dofs and see where the numbers go
+ u = 0.;
+ for (unsigned int i=0;i<v[2].size();++i)
+ {
+ v[2](i) = i+1;
+ w[2](i) = i+1;
+ }
+
+ BlockVector<double> uu;
+ uu.reinit(u);
+ transfer.copy_from_mg_add(mgdof, u, v);
+ transfer_block.copy_from_mg_add(mgdof, uu, v);
+ u.print(std::cout, 0, false);
+ uu.print(std::cout, 0, false);
+ u.add(-1., uu);
+ deallog << u.l2_norm() << std::endl;
+
+}
+
+
+int main()
+{
+ std::ofstream logfile("transfer_compare_01/output");
+ logfile.precision(3);
+ deallog.attach(logfile);
+ deallog.depth_console(0);
+ deallog.threshold_double(1.e-10);
+
+ std::vector<double> factors;
+
+ FE_DGQ<2> q0(0);
+ FE_DGQ<2> q1(1);
+ FE_Q<2> cq1(1);
+ FE_RaviartThomasNodal<2> rt0(0);
+ FE_RaviartThomasNodal<2> rt1(1);
+
+ FESystem<2> fe0(rt1, 1, q1, 1);
+ FESystem<2> fe1(rt0, 2, q0, 2);
+
+ check_block(q0);
+ check_block(cq1);
+ check_block(rt1);
+
+ check_block(fe0);
+ check_block(fe1);
+}
--- /dev/null
+
+DEAL::All
+DEAL::FESystem<2>[FE_RaviartThomasNodal<2>(1)-FE_DGQ<2>(1)]
+DEAL::selected 0 1
+DEAL::Global dofs: 144 64
+DEAL::Level 0 dofs: 12 4
+DEAL::Level 1 dofs: 40 16
+DEAL::Level 2 dofs: 144 64
+DEAL::u0 12 4
+DEAL::u1 40 16
+DEAL::u2 144 64
+DEAL::u1 572 256
+DEAL::u0 2214 1024
+DEAL:: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208
+DEAL:: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208
+DEAL::Velocity
+DEAL::FESystem<2>[FE_RaviartThomasNodal<2>(1)-FE_DGQ<2>(1)]
+DEAL::selected 0
+DEAL::Global dofs: 144 64
+DEAL::Level 0 dofs: 12 4
+DEAL::Level 1 dofs: 40 16
+DEAL::Level 2 dofs: 144 64
+DEAL::u0 12 4
+DEAL::u1 40 0
+DEAL::u2 144 0
+DEAL::u1 572 0
+DEAL::u0 2214 0
+DEAL:: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144
+DEAL:: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
+DEAL::Pressure
+DEAL::FESystem<2>[FE_RaviartThomasNodal<2>(1)-FE_DGQ<2>(1)]
+DEAL::selected 1
+DEAL::Global dofs: 144 64
+DEAL::Level 0 dofs: 12 4
+DEAL::Level 1 dofs: 40 16
+DEAL::Level 2 dofs: 144 64
+DEAL::u0 12 4
+DEAL::u1 0 16
+DEAL::u2 0 64
+DEAL::u1 0 256
+DEAL::u0 0 1024
+DEAL:: 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208
+DEAL:: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64
+DEAL::FESystem<2>[FE_RaviartThomasNodal<2>(0)^2-FE_DGQ<2>(0)^2]
+DEAL::selected 1 3
+DEAL::Global dofs: 40 40 16 16
+DEAL::Level 0 dofs: 4 4 1 1
+DEAL::Level 1 dofs: 12 12 4 4
+DEAL::Level 2 dofs: 40 40 16 16
+DEAL::u0 4 4 1 1
+DEAL::u1 0 12 0 4
+DEAL::u2 0 40 0 16
+DEAL::u1 0 136 0 64
+DEAL::u0 0 400 0 256
+DEAL:: 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112
+DEAL:: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56