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OptiPack_DefaultPolyLineSearchPointEvaluator.hpp
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43 
44 #ifndef OPTIPACK_DEFAULT_POLY_LINE_SEARCH_POINT_EVALUATOR_HPP
45 #define OPTIPACK_DEFAULT_POLY_LINE_SEARCH_POINT_EVALUATOR_HPP
46 
47 
48 #include "OptiPack_LineSearchPointEvaluatorBase.hpp"
49 #include "Thyra_VectorStdOps.hpp"
50 
51 
52 namespace OptiPack {
53 
54 
68 template<typename Scalar>
70 {
71 public:
72 
75 
78 
81 
83  void initialize(const ArrayView<const RCP<const Thyra::VectorBase<Scalar> > > &vecs);
84 
86 
89 
91  virtual void computePoint( const ScalarMag &alpha,
93  ) const;
94 
96 
97 private:
98 
100 
101 };
102 
103 
108 template<typename Scalar>
111 {
113 }
114 
115 
116 //
117 // Implementations
118 //
119 
120 
121 // Constructors/intializers/accessors
122 
123 
124 template<typename Scalar>
126 {}
127 
128 
129 template<typename Scalar>
131  const ArrayView<const RCP<const Thyra::VectorBase<Scalar> > > &vecs
132  )
133 {
134 #ifdef TEUCHOS_DEBUG
135  TEUCHOS_ASSERT(vecs.size());
136 #endif
137  vecs_ = vecs;
138 }
139 
140 
141 // Overridden from LineSearchPointEvaluatorBase
142 
143 
144 template<typename Scalar>
146  const Ptr<Thyra::VectorBase<Scalar> > &p
147  ) const
148 {
149  typedef ScalarTraits<Scalar> ST;
150  using Teuchos::as;
151  using Thyra::V_V;
152  using Thyra::Vp_StV;
153  V_V( p, *vecs_[0] );
154  if (alpha != ST::zero()) {
155  ScalarMag alpha_i = alpha;
156  const int n = vecs_.size();
157  for (int i = 1; i < n; ++i, alpha_i *= alpha) {
158  Vp_StV(p, alpha_i, *vecs_[i]);
159  }
160  }
161 }
162 
163 
164 } // namespace OptiPack
165 
166 
167 #endif // OPTIPACK_DEFAULT_POLY_LINE_SEARCH_POINT_EVALUATOR_HPP
Default line search point evaluator using a polynomial linear combination of vectors.
virtual void computePoint(const ScalarMag &alpha, const Ptr< Thyra::VectorBase< Scalar > > &p) const
TEUCHOS_DEPRECATED RCP< T > rcp(T *p, Dealloc_T dealloc, bool owns_mem)
void initialize(const ArrayView< const RCP< const Thyra::VectorBase< Scalar > > > &vecs)
TypeTo as(const TypeFrom &t)
Base class interface for line search point updates.
const RCP< DefaultPolyLineSearchPointEvaluator< Scalar > > defaultPolyLineSearchPointEvaluator()
Nonmember constructor.
#define TEUCHOS_ASSERT(assertion_test)