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MueLu_RigidBodyModeFactory_def.hpp
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46 #ifndef MUELU_RIGIDBODYMODEFACTORY_DEF_HPP
47 #define MUELU_RIGIDBODYMODEFACTORY_DEF_HPP
48 
49 #include <Xpetra_Matrix.hpp>
50 #include <Xpetra_MultiVectorFactory.hpp>
51 #include <Xpetra_VectorFactory.hpp>
52 
54 #include "MueLu_Level.hpp"
55 #include "MueLu_Monitor.hpp"
56 
57 namespace MueLu {
58 
59  template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
61 
62  template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
64  if (currentLevel.IsAvailable(nspName_, NoFactory::get()) == false && currentLevel.GetLevelID() == 0) {
65  Input(currentLevel, "A");
66  //Input(currentLevel,"Coordinates");
67  }
68  if (currentLevel.GetLevelID() !=0) {
69  currentLevel.DeclareInput("Nullspace", GetFactory(nspName_).get(), this); /* ! "Nullspace" and nspName_ mismatch possible here */
70  }
71  }
72 
73  template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
75  FactoryMonitor m(*this, "Rigid body mode factory", currentLevel);
76  RCP<MultiVector> nullspace;
77  if (currentLevel.GetLevelID() == 0) {
78  if (currentLevel.IsAvailable(nspName_, NoFactory::get())) {
79  nullspace = currentLevel.Get< RCP<MultiVector> >(nspName_, NoFactory::get());
80  GetOStream(Runtime1) << "Use user-given rigid body modes " << nspName_ << ": nullspace dimension=" << nullspace->getNumVectors() << " nullspace length=" << nullspace->getGlobalLength() << std::endl;
81  }
82  else {
83  RCP<Matrix> A = Get< RCP<Matrix> >(currentLevel, "A");
84  GetOStream(Runtime1) << "Generating rigid body modes: dimension = " << numPDEs_ << std::endl;
85  RCP<const Map> xmap=A->getDomainMap();
86  if(numPDEs_==1) { nullspace = MultiVectorFactory::Build(xmap, 1); }
87  else if(numPDEs_==2) { nullspace = MultiVectorFactory::Build(xmap, 3); }
88  else if(numPDEs_==3) { nullspace = MultiVectorFactory::Build(xmap, 6); }
89  Scalar zero(0.0);
90  nullspace -> putScalar(zero);
91  RCP<MultiVector> Coords = Get< RCP<MultiVector> >(currentLevel,"Coordinates");
92  ArrayRCP<Scalar> xnodes, ynodes, znodes;
93  Scalar cx, cy, cz;
94  ArrayRCP<Scalar> nsValues0, nsValues1, nsValues2, nsValues3, nsValues4, nsValues5;
95  int nDOFs=xmap->getNodeNumElements();
96  if(numPDEs_==1) {
97  nsValues0 = nullspace->getDataNonConst(0);
98  for(int j=0; j<nDOFs; j++) {
99  // constant null space for scalar PDE
100  nsValues0[j]=1.0;
101  }
102  }
103  else if(numPDEs_==2) {
104  xnodes = Coords->getDataNonConst(0);
105  ynodes = Coords->getDataNonConst(1);
106  cx = Coords->getVector(0)->meanValue();
107  cy = Coords->getVector(1)->meanValue();
108  nsValues0 = nullspace->getDataNonConst(0);
109  nsValues1 = nullspace->getDataNonConst(1);
110  nsValues2 = nullspace->getDataNonConst(2);
111  for (int j=0; j<nDOFs; j+=numPDEs_) {
112  // translation
113  nsValues0[j+0] = 1.0;
114  nsValues1[j+1] = 1.0;
115  // rotate around z-axis (x-y plane)
116  nsValues2[j+0] = -(ynodes[j]-cy);
117  nsValues2[j+1] = (xnodes[j]-cx);
118  }
119  }
120  else if(numPDEs_==3) {
121  xnodes = Coords->getDataNonConst(0);
122  ynodes = Coords->getDataNonConst(1);
123  znodes = Coords->getDataNonConst(2);
124  cx = Coords->getVector(0)->meanValue();
125  cy = Coords->getVector(1)->meanValue();
126  cz = Coords->getVector(2)->meanValue();
127  nsValues0 = nullspace->getDataNonConst(0);
128  nsValues1 = nullspace->getDataNonConst(1);
129  nsValues2 = nullspace->getDataNonConst(2);
130  nsValues3 = nullspace->getDataNonConst(3);
131  nsValues4 = nullspace->getDataNonConst(4);
132  nsValues5 = nullspace->getDataNonConst(5);
133  for (int j=0; j<nDOFs; j+=numPDEs_) {
134  // translation
135  nsValues0[j+0] = 1.0;
136  nsValues1[j+1] = 1.0;
137  nsValues2[j+2] = 1.0;
138  // rotate around z-axis (x-y plane)
139  nsValues3[j+0] = -(ynodes[j]-cy);
140  nsValues3[j+1] = (xnodes[j]-cx);
141  // rotate around x-axis (y-z plane)
142  nsValues4[j+1] = -(znodes[j]-cz);
143  nsValues4[j+2] = (ynodes[j]-cy);
144  // rotate around y-axis (x-z plane)
145  nsValues5[j+0] = (znodes[j]-cz);
146  nsValues5[j+2] = -(xnodes[j]-cx);
147  }
148  }
149  } // end if "Nullspace" not available
150  }
151  else {
152  nullspace = currentLevel.Get< RCP<MultiVector> >("Nullspace", GetFactory(nspName_).get());
153  }
154  Set(currentLevel, "Nullspace", nullspace);
155  }
156 
157 } // namespace MueLu
158 
159 #define MUELU_RIGIDBODYMODEFACTORY_SHORT
160 #endif // MUELU_RIGIDBODYMODEFACTORY_DEF_HPP
T & Get(const std::string &ename, const FactoryBase *factory=NoFactory::get())
Get data without decrementing associated storage counter (i.e., read-only access). Usage: Level-&gt;Get&lt; RCP&lt;Matrix&gt; &gt;(&quot;A&quot;, factory) if factory == NULL =&gt; use default factory.
Timer to be used in factories. Similar to Monitor but with additional timers.
static const NoFactory * get()
MueLu::DefaultScalar Scalar
Class that holds all level-specific information.
Definition: MueLu_Level.hpp:99
void Build(Level &currentLevel) const
Build an object with this factory.
int GetLevelID() const
Return level number.
Definition: MueLu_Level.cpp:76
Description of what is happening (more verbose)
void DeclareInput(const std::string &ename, const FactoryBase *factory, const FactoryBase *requestedBy=NoFactory::get())
Callback from FactoryBase::CallDeclareInput() and FactoryBase::DeclareInput()
void DeclareInput(Level &currentLevel) const
Specifies the data that this class needs, and the factories that generate that data.
bool IsAvailable(const std::string &ename, const FactoryBase *factory=NoFactory::get()) const
Test whether a need&#39;s value has been saved.