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Panzer_CrossProduct_impl.hpp
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42 
43 #ifndef PANZER_EVALUATOR_CrossProduct_IMPL_HPP
44 #define PANZER_EVALUATOR_CrossProduct_IMPL_HPP
45 
46 #include <string>
47 
48 #include "Panzer_PointRule.hpp"
50 
51 #include "Teuchos_RCP.hpp"
52 
53 namespace panzer {
54 
55 //**********************************************************************
56 template<typename EvalT, typename Traits>
59  const Teuchos::ParameterList& p)
60 {
61  std::string result_name = p.get<std::string>("Result Name");
62  std::string vec_a_name = p.get<std::string>("Vector A Name");
63  std::string vec_b_name = p.get<std::string>("Vector B Name");
64 
66  p.get< Teuchos::RCP<const panzer::PointRule> >("Point Rule");
67 
68  // use a scalar field only if dimension is 2D
69  useScalarField = (pr->spatial_dimension==2);
70 
71  if(!useScalarField)
72  vec_a_cross_vec_b = PHX::MDField<ScalarT>(result_name, pr->dl_vector);
73  else
74  vec_a_cross_vec_b = PHX::MDField<ScalarT>(result_name, pr->dl_scalar);
75 
76  vec_a = PHX::MDField<const ScalarT>(vec_a_name, pr->dl_vector);
77  vec_b = PHX::MDField<const ScalarT>(vec_b_name, pr->dl_vector);
78 
79  this->addEvaluatedField(vec_a_cross_vec_b);
80  this->addDependentField(vec_a);
81  this->addDependentField(vec_b);
82 
83  std::string n = "CrossProduct: " + result_name + " = " + vec_a_name + " . " + vec_b_name;
84  this->setName(n);
85 }
86 
87 //**********************************************************************
88 template<typename EvalT, typename Traits>
89 void
92  typename Traits::SetupData /* sd */,
93  PHX::FieldManager<Traits>& /* fm */)
94 {
95  num_pts = vec_a.extent(1);
96  num_dim = vec_a.extent(2);
97 
98  TEUCHOS_ASSERT(vec_a.extent(1) == vec_b.extent(1));
99  TEUCHOS_ASSERT(vec_a.extent(2) == vec_b.extent(2));
100 }
101 
102 //**********************************************************************
103 template<typename EvalT, typename Traits>
104 void
107  typename Traits::EvalData workset)
108 {
109  if(useScalarField) {
110  for (index_t cell = 0; cell < workset.num_cells; ++cell) {
111  for (int p = 0; p < num_pts; ++p) {
112  vec_a_cross_vec_b(cell,p) = vec_a(cell,p,0)*vec_b(cell,p,1)-vec_a(cell,p,1)*vec_b(cell,p,0);
113  }
114  }
115  }
116  else {
117  for (index_t cell = 0; cell < workset.num_cells; ++cell) {
118  for (int p = 0; p < num_pts; ++p) {
119  vec_a_cross_vec_b(cell,p,0) = vec_a(cell,p,1)*vec_b(cell,p,2)-vec_a(cell,p,2)*vec_b(cell,p,1);
120  vec_a_cross_vec_b(cell,p,1) = -(vec_a(cell,p,0)*vec_b(cell,p,2)-vec_a(cell,p,2)*vec_b(cell,p,0));
121  vec_a_cross_vec_b(cell,p,2) = vec_a(cell,p,0)*vec_b(cell,p,1)-vec_a(cell,p,1)*vec_b(cell,p,0);
122  }
123  }
124  }
125 }
126 
127 //**********************************************************************
128 
129 }
130 
131 #endif
void postRegistrationSetup(typename Traits::SetupData d, PHX::FieldManager< Traits > &fm)
T & get(const std::string &name, T def_value)
void evaluateFields(typename Traits::EvalData d)
#define TEUCHOS_ASSERT(assertion_test)
CrossProduct(const Teuchos::ParameterList &p)