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gsFieldCreator.h
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1 
14 #pragma once
15 
16 #include <gsCore/gsField.h>
17 
18 namespace gismo
19 {
20 
21 
31 template<class T>
32 class gsAbsError : public gsFunction<T>
33 {
34 public:
36  typedef memory::shared_ptr< gsAbsError > Ptr;
37 
39  typedef memory::unique_ptr< gsAbsError > uPtr;
40 
41  gsAbsError( gsFunction<T> const & f1,
42  gsGeometry<T> const & geo,
43  gsFunction<T> const & f2,
44  bool _f2param = false)
45  : m_geo(geo), m_f1(f1), m_f2(f2), f2param(_f2param)
46  {
47 
48  }
49 
50  GISMO_CLONE_FUNCTION(gsAbsError)
51 
52  void eval_into(const gsMatrix<T>& u, gsMatrix<T>& result) const
53  {
54  gsMatrix<T> tmp;
55  m_geo.eval_into(u, tmp);
56 
57  if(!f2param)
58  result.noalias() = ( m_f1.eval(u) - m_f2.eval(tmp) ).cwiseAbs();
59  else
60  result.noalias() = ( m_f1.eval(u) - m_f2.eval(u) ).cwiseAbs(); // f2 parametric function
61 
62  }
63 
64  short_t domainDim() const { return m_f1.domainDim(); }
65  short_t targetDim() const { return m_f1.targetDim(); }
66 
68  std::ostream &print(std::ostream &os) const
69  { os << "Absolute error.\n"; return os; };
70 private:
71  const gsGeometry<T> & m_geo;
72 
73  const gsFunction<T> & m_f1;
74  const gsFunction<T> & m_f2;
75 
76  bool f2param;
77 
78 private:
79 // gsAbsError() { }
80 };
81 
82 
90 template<class T>
91 class gsGradientField : public gsFunction<T>
92 {
93 public:
95  typedef memory::shared_ptr< gsGradientField > Ptr;
96 
98  typedef memory::unique_ptr< gsGradientField > uPtr;
99 
100  gsGradientField( gsGeometry<T> const & geo, gsFunction<T> const & f)
101  : m_geo(geo), m_f(f)
102  { }
103 
104  GISMO_CLONE_FUNCTION(gsGradientField)
105 
106  void eval_into(const gsMatrix<T>& u, gsMatrix<T>& result) const
107  {
108  gsMatrix<T> tmp;
109  m_geo.eval_into(u, tmp);
110  m_f.deriv_into(tmp, result);
111  }
112 
113  short_t domainDim() const { return m_geo.parDim(); }
114  short_t targetDim() const { return m_geo.geoDim(); }
115 
117  std::ostream &print(std::ostream &os) const
118  { os << "Gradient field of "; return os; };
119 private:
120  const gsGeometry<T> & m_geo;
121  const gsFunction<T> & m_f ;
122 };
123 
131 template<class T>
132 class gsJacDetField : public gsFunction<T>
133 {
134 public:
136  typedef memory::shared_ptr< gsJacDetField > Ptr;
137 
139  typedef memory::unique_ptr< gsJacDetField > uPtr;
140 
141  gsJacDetField( gsGeometry<T> const & geo)
142  : m_geo(geo), m_dim(m_geo.parDim())
143  {
144  GISMO_ENSURE(m_dim == m_geo.geoDim(), "Not extended to surface case yet." );
145  }
146 
147  GISMO_CLONE_FUNCTION(gsJacDetField)
148 
149  void eval_into(const gsMatrix<T>& u, gsMatrix<T>& result) const
150  {
151  result.resize(1, u.cols() );
152  gsMatrix<T> tmp;
153  for (index_t k=0; k!= u.cols(); ++k)
154  result(0,k) = m_geo.deriv(u.col(k)).reshape(m_dim,m_dim).determinant();
155  }
156 
157  short_t domainDim() const { return m_geo.parDim(); }
158  short_t targetDim() const { return 1; }
159 
161  std::ostream &print(std::ostream &os) const
162  { os << "Jacobian determinant field of "; return os; };
163 private:
164  const gsGeometry<T> & m_geo;
165  const int m_dim;
166 };
167 
175 template<class T>
176 class gsNormalField : public gsFunction<T>
177 {
178 public:
180  typedef memory::shared_ptr< gsNormalField > Ptr;
181 
183  typedef memory::unique_ptr< gsNormalField > uPtr;
184 
185  gsNormalField( gsGeometry<T> const & geo) : m_geo(geo)
186  {
187 
188  }
189 
190  GISMO_CLONE_FUNCTION(gsNormalField)
191 
192  void eval_into(const gsMatrix<T>& u, gsMatrix<T>& result) const
193  {
194  const short_t ParDim = m_geo.parDim();
195  result.resize(ParDim+1, u.cols()) ;
196 
197  gsMatrix<T> Jk;
198 
199  for( index_t j=0; j < u.cols(); ++j )
200  {
201  Jk = m_geo.jacobian( u.col(j) );
202  T alt_sgn(1.0);
203  gsMatrix<T> mm(ParDim,ParDim);
204  for (int i = 0; i <= ParDim; ++i) // for all components of the normal vector
205  {
206  Jk.rowMinor(i, mm);
207  result(i,j) = alt_sgn * mm.determinant();
208  alt_sgn = -alt_sgn;
209  }
210  }
211  }
212 
213  short_t domainDim() const { return m_geo.parDim(); }
214  short_t targetDim() const { return m_geo.geoDim();}
215 
217  std::ostream &print(std::ostream &os) const
218  { os << "NormalField"; return os; };
219 private:
220  const gsGeometry<T> & m_geo;
221 
222 private:
223 // gsNormalField() { }
224 };
225 
234 template<class T>
235 class gsParamField : public gsFunction<T>
236 {
237 public:
239  typedef memory::shared_ptr< gsParamField > Ptr;
240 
242  typedef memory::unique_ptr< gsParamField > uPtr;
243 
244  gsParamField(gsGeometry<T> const & geo)
245  : m_geo(geo)
246  {
247 
248  }
249 
250  GISMO_CLONE_FUNCTION(gsParamField)
251 
252  void eval_into(const gsMatrix<T>& u, gsMatrix<T>& result) const
253  { result = u; }
254 
255  short_t domainDim() const { return m_geo.domainDim(); }
256  short_t targetDim() const { return m_geo.domainDim(); }
257 
259  std::ostream &print(std::ostream &os) const
260  { os << "Parameter field.\n"; return os; };
261 
262 private:
263  const gsGeometry<T> & m_geo;
264 };
265 
266 
276 template<class T>
277 class gsPatchIdField : public gsFunction<T>
278 {
279 public:
281  typedef memory::shared_ptr< gsPatchIdField > Ptr;
282 
284  typedef memory::unique_ptr< gsPatchIdField > uPtr;
285 
286  explicit gsPatchIdField(gsGeometry<T> const & geo_)
287  : geo(geo_), m_supp(geo.support())
288  { }
289 
290  GISMO_CLONE_FUNCTION(gsPatchIdField)
291 
292  void eval_into(const gsMatrix<T>& u, gsMatrix<T>& result) const
293  {
294  result.setZero(2, u.cols() );
295  result.row(0).setConstant(geo.id());
296 
297  const int d = geo.parDim();
298  for (boxSide c=boxSide::getFirst(d); c<boxSide::getEnd(d); ++c)
299  {
300  const index_t dir = c.direction();
301  const T par = m_supp(dir, c.parameter() );
302 
303  for (index_t v = 0; v != u.cols(); ++v) // for all columns of u
304  {
305  if ( math::abs( u(dir,v) - par ) < 1e-2 )
306  result(1,v) = static_cast<T>(c);
307  }
308  }
309  }
310 
311  short_t domainDim() const { return geo.domainDim(); }
312  short_t targetDim() const { return 2; }
313 
315  std::ostream &print(std::ostream &os) const
316  { os << "Boundary side indicator field.\n"; return os; };
317 
318 private:
319  const gsGeometry<T> & geo;
320  gsMatrix<T> m_supp;
321 };
322 
323 
324 
331 template<class T>
333 {
334 
335  static gsField<T> absError(gsField<T> const & field, gsFunction<T> const & f, bool fparam = false)
336  {
337  const gsMultiPatch<T> & mp = field.patches();
338 
340 
341  for (size_t k=0; k< mp.nPatches(); ++k)
342  nFields->addPiecePointer( new gsAbsError<T>(field.function(k), mp.patch(k), f, fparam) );
343 
344  return gsField<T>(mp, typename gsPiecewiseFunction<T>::Ptr(nFields), true );
345  }
346 
347 
348  static gsField<T> gradient(gsMultiPatch<T> const & mp, gsFunction<T> const & f)
349  {
351 
352 
353  for (size_t k=0; k< mp.nPatches(); ++k)
354  nFields->addPiecePointer( new gsGradientField<T>(mp.patch(k), f) );
355 
356  return gsField<T>(mp, typename gsPiecewiseFunction<T>::Ptr(nFields), true );
357  }
358 
359  static gsField<T> normal(gsMultiPatch<T> const & mp)
360  {
362 
363 
364  for (size_t k=0; k< mp.nPatches(); ++k)
365  nFields->addPiecePointer( new gsNormalField<T>(mp.patch(k)) );
366 
367  return gsField<T>(mp, typename gsPiecewiseFunction<T>::Ptr(nFields), true );
368  }
369 
370 
371  static gsField<T> jacDet(gsMultiPatch<T> const & mp)
372  {
374 
375 
376  for (size_t k=0; k< mp.nPatches(); ++k)
377  nFields->addPiecePointer( new gsJacDetField<T>(mp.patch(k)) );
378 
379  return gsField<T>(mp, typename gsPiecewiseFunction<T>::Ptr(nFields), true );
380  }
381 
382  static gsField<T> parameters(gsMultiPatch<T> const & mp)
383  {
385 
386 
387  for (size_t k=0; k< mp.nPatches(); ++k)
388  nFields->addPiecePointer( new gsParamField<T>(mp.patch(k)) );
389 
390  return gsField<T>(mp, typename gsPiecewiseFunction<T>::Ptr(nFields), true );
391  }
392 
393  static gsField<T> patchIds(gsMultiPatch<T> const & mp)
394  {
396  for (size_t k=0; k< mp.nPatches(); ++k)
397  nFields->addPiecePointer( new gsPatchIdField<T>(mp.patch(k)) );
398  return gsField<T>(mp, typename gsPiecewiseFunction<T>::Ptr(nFields), true );
399  }
400 
401 }; // struct gsFieldCreator
402 
403 
404 
405 } // namespace gismo
short_t domainDim() const
Dimension of the (source) domain.
Definition: gsFieldCreator.h:157
Generates a field with value the absolute difference (error) between and isogeometric function and a ...
Definition: gsFieldCreator.h:32
short_t targetDim() const
Dimension of the target space.
Definition: gsFieldCreator.h:65
short_t targetDim() const
Dimension of the target space.
Definition: gsFieldCreator.h:256
Class that creates standard fields on a given parametric (multipatch) geometry.
Definition: gsFieldCreator.h:332
Abstract base class representing a geometry map.
Definition: gsGeometry.h:92
void rowMinor(index_t i, RowMinorMatrixType &result) const
Definition: gsMatrix.h:331
std::ostream & print(std::ostream &os) const
Prints the object as a string.
Definition: gsFieldCreator.h:161
memory::shared_ptr< gsJacDetField > Ptr
Shared pointer for gsJacDetField.
Definition: gsFieldCreator.h:136
A scalar of vector field defined on a m_parametric geometry.
Definition: gsField.h:54
const gsFunction< T > & function(int i=0) const
Returns the gsFunction of patch i.
Definition: gsField.h:231
#define short_t
Definition: gsConfig.h:35
static boxSide getFirst(short_t)
helper for iterating on sides of an n-dimensional box
Definition: gsBoundary.h:160
std::ostream & print(std::ostream &os) const
Prints the object as a string.
Definition: gsFieldCreator.h:259
memory::shared_ptr< gsPatchIdField > Ptr
Shared pointer for gsPatchIdField.
Definition: gsFieldCreator.h:281
Generates a field that attaches the parameter values on each physical point.
Definition: gsFieldCreator.h:235
short_t domainDim() const
Dimension of the (source) domain.
Definition: gsFieldCreator.h:113
short_t domainDim() const
Dimension of the (source) domain.
Definition: gsFieldCreator.h:213
std::ostream & print(std::ostream &os) const
Prints the object as a string.
Definition: gsFieldCreator.h:315
short_t domainDim() const
Dimension of the (source) domain.
Definition: gsFieldCreator.h:255
memory::unique_ptr< gsNormalField > uPtr
Unique pointer for gsNormalField.
Definition: gsFieldCreator.h:183
memory::shared_ptr< gsParamField > Ptr
Shared pointer for gsParamField.
Definition: gsFieldCreator.h:239
memory::shared_ptr< gsGradientField > Ptr
Shared pointer for gsGradientField.
Definition: gsFieldCreator.h:95
memory::unique_ptr< gsPatchIdField > uPtr
Unique pointer for gsPatchIdField.
Definition: gsFieldCreator.h:284
#define index_t
Definition: gsConfig.h:32
#define GISMO_ENSURE(cond, message)
Definition: gsDebug.h:102
std::ostream & print(std::ostream &os) const
Prints the object as a string.
Definition: gsFieldCreator.h:217
A function from a n-dimensional domain to an m-dimensional image.
Definition: gsFunction.h:59
memory::unique_ptr< gsGradientField > uPtr
Unique pointer for gsGradientField.
Definition: gsFieldCreator.h:98
A matrix with arbitrary coefficient type and fixed or dynamic size.
Definition: gsMatrix.h:38
memory::unique_ptr< gsAbsError > uPtr
Unique pointer for gsAbsError.
Definition: gsFieldCreator.h:39
void eval_into(const gsMatrix< T > &u, gsMatrix< T > &result) const
Evaluate the function at points u into result.
Definition: gsFieldCreator.h:192
memory::shared_ptr< gsNormalField > Ptr
Shared pointer for gsNormalField.
Definition: gsFieldCreator.h:180
const gsMultiPatch< T > & patches() const
Returns gsMultiPatch containing the geometric information on the domain.
Definition: gsField.h:210
std::ostream & print(std::ostream &os) const
Prints the object as a string.
Definition: gsFieldCreator.h:68
memory::unique_ptr< gsParamField > uPtr
Unique pointer for gsParamField.
Definition: gsFieldCreator.h:242
Generates a field that indicates the boundary sides on the geometry.
Definition: gsFieldCreator.h:277
static boxSide getEnd(short_t dim)
helper for iterating on sides of an n-dimensional box
Definition: gsBoundary.h:176
short_t domainDim() const
Dimension of the (source) domain.
Definition: gsFieldCreator.h:311
void eval_into(const gsMatrix< T > &u, gsMatrix< T > &result) const
Evaluate the function at points u into result.
Definition: gsFieldCreator.h:252
gsGeometry< T > & patch(size_t i) const
Return the i-th patch.
Definition: gsMultiPatch.h:226
size_t nPatches() const
Number of patches.
Definition: gsMultiPatch.h:208
short_t targetDim() const
Dimension of the target space.
Definition: gsFieldCreator.h:214
short_t domainDim() const
Dimension of the (source) domain.
Definition: gsFieldCreator.h:64
std::ostream & print(std::ostream &os) const
Prints the object as a string.
Definition: gsFieldCreator.h:117
void eval_into(const gsMatrix< T > &u, gsMatrix< T > &result) const
Evaluate the function at points u into result.
Definition: gsFieldCreator.h:106
Container class for a set of geometry patches and their topology, that is, the interface connections ...
Definition: gsMultiPatch.h:33
Struct which represents a certain side of a box.
Definition: gsBoundary.h:84
Generates a field with value the Jacobian determinant of a geometry.
Definition: gsFieldCreator.h:132
EIGEN_STRONG_INLINE reshape_expr< E > const reshape(E const &u, index_t n, index_t m)
Reshape an expression.
Definition: gsExpressions.h:1925
void eval_into(const gsMatrix< T > &u, gsMatrix< T > &result) const
Evaluate the function at points u into result.
Definition: gsFieldCreator.h:149
Generates the normal field of a geometry.
Definition: gsFieldCreator.h:176
memory::unique_ptr< gsJacDetField > uPtr
Unique pointer for gsJacDetField.
Definition: gsFieldCreator.h:139
short_t targetDim() const
Dimension of the target space.
Definition: gsFieldCreator.h:158
void eval_into(const gsMatrix< T > &u, gsMatrix< T > &result) const
Evaluate the function at points u into result.
Definition: gsFieldCreator.h:292
void eval_into(const gsMatrix< T > &u, gsMatrix< T > &result) const
Evaluate the function at points u into result.
Definition: gsFieldCreator.h:52
EIGEN_STRONG_INLINE abs_expr< E > abs(const E &u)
Absolute value.
Definition: gsExpressions.h:4486
Generates a field with value being the gradient of an isogeometric function.
Definition: gsFieldCreator.h:91
A function depending on an index i, typically referring to a patch/sub-domain. On each patch a differ...
Definition: gsPiecewiseFunction.h:28
short_t targetDim() const
Dimension of the target space.
Definition: gsFieldCreator.h:312
memory::shared_ptr< gsPiecewiseFunction > Ptr
Shared pointer for gsPiecewiseFunction.
Definition: gsPiecewiseFunction.h:37
memory::shared_ptr< gsAbsError > Ptr
Shared pointer for gsAbsError.
Definition: gsFieldCreator.h:36
short_t targetDim() const
Dimension of the target space.
Definition: gsFieldCreator.h:114
Provides declaration of the Field class.