1 // Copyright (C) 2007-2012 CEA/DEN, EDF R&D
3 // This library is free software; you can redistribute it and/or
4 // modify it under the terms of the GNU Lesser General Public
5 // License as published by the Free Software Foundation; either
6 // version 2.1 of the License.
8 // This library is distributed in the hope that it will be useful,
9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 // Lesser General Public License for more details.
13 // You should have received a copy of the GNU Lesser General Public
14 // License along with this library; if not, write to the Free Software
15 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
20 #include "MEDPARTITIONER_MetisGraph.hxx"
21 #include "MEDPARTITIONER_ParaDomainSelector.hxx"
22 #include "MEDPARTITIONER_Utils.hxx"
24 #include "InterpKernelException.hxx"
28 #ifdef MED_ENABLE_METIS
35 using namespace MEDPARTITIONER;
37 METISGraph::METISGraph():Graph()
41 METISGraph::METISGraph(MEDPARTITIONER::SkyLineArray* graph, int* edgeweight)
42 :Graph(graph,edgeweight)
46 METISGraph::~METISGraph()
50 void METISGraph::partGraph(int ndomain,
51 const std::string& options_string,
52 ParaDomainSelector *parallelizer)
55 if (MyGlobals::_Verbose>10)
56 std::cout << "proc " << MyGlobals::_Rank << " : METISGraph::partGraph" << std::endl;
58 //number of graph vertices
59 int n=_graph->getNumberOf();
61 int * xadj=const_cast<int*>(_graph->getIndex());
62 int * adjncy=const_cast<int*>(_graph->getValue());
64 int * vwgt=_cell_weight;
65 int * adjwgt=_edge_weight;
66 int wgtflag=(_edge_weight!=0)?1:0+(_cell_weight!=0)?2:0;
73 (0=default_option,option,random_seed) see defs.h
74 #define PMV3_OPTION_DBGLVL 1
75 #define PMV3_OPTION_SEED 2
76 #define PMV3_OPTION_IPART 3
77 #define PMV3_OPTION_PSR 3
78 seems no changes int options[4]={1,0,33,0}; //test for a random seed of 33
80 int options[4]={0,0,0,0};
81 #if !defined(MED_ENABLE_METIS)
82 throw INTERP_KERNEL::Exception("METISGraph::partGraph : METIS is not available. Check your products, please.");
86 int* partition=new int[n];
90 if (MyGlobals::_Verbose>10)
91 std::cout << "METISGraph::partGraph METIS_PartGraph METIS_PartGraph(RecursiveOrKway)" << std::endl;
92 if (options_string != "k")
93 METIS_PartGraphRecursive(&n, xadj, adjncy, vwgt, adjwgt, &wgtflag,
94 &base, &nparts, options, &edgecut, partition);
96 METIS_PartGraphKway(&n, xadj, adjncy, vwgt, adjwgt, &wgtflag,
97 &base, &nparts, options, &edgecut, partition);
99 else //force this case because METIS send all 1 in value
101 for (int i=0; i<n; i++)
104 vector<int> index(n+1);
105 vector<int> value(n);
107 for (int i=0; i<n; i++)
109 index[i+1]=index[i]+1;
110 value[i]=partition[i];
114 //creating a skylinearray with no copy of the index and partition array
115 //the fifth argument true specifies that only the pointers are passed
117 _partition = new MEDPARTITIONER::SkyLineArray(index,value);