Chaste Commit::ca8ccdedf819b6e02855bc0e8e6f50bdecbc5208
FourthOrderTensor.hpp
1/*
2
3Copyright (c) 2005-2024, University of Oxford.
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10This file is part of Chaste.
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13modification, are permitted provided that the following conditions are met:
14 * Redistributions of source code must retain the above copyright notice,
15 this list of conditions and the following disclaimer.
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19 * Neither the name of the University of Oxford nor the names of its
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23THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
24AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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34*/
35
36#ifndef _FOURTHORDERTENSOR_HPP_
37#define _FOURTHORDERTENSOR_HPP_
38
39#include <cassert>
40#include <vector>
41
42#include "UblasIncludes.hpp"
43#include "Exception.hpp"
44
50template<unsigned DIM1, unsigned DIM2, unsigned DIM3, unsigned DIM4>
52{
53private:
54
55 std::vector<double> mData;
63 unsigned GetVectorIndex(unsigned M, unsigned N, unsigned P, unsigned Q)
64 {
65 assert(M<DIM1);
66 assert(N<DIM2);
67 assert(P<DIM3);
68 assert(Q<DIM4);
69 return M + DIM1*N + DIM1*DIM2*P + DIM1*DIM2*DIM3*Q;
70 }
71
72public:
73
78
87 template<unsigned CONTRACTED_DIM>
88 void SetAsContractionOnFirstDimension(const c_matrix<double,DIM1,CONTRACTED_DIM>& rMatrix, FourthOrderTensor<CONTRACTED_DIM,DIM2,DIM3,DIM4>& rTensor);
89
90
99 template<unsigned CONTRACTED_DIM>
100 void SetAsContractionOnSecondDimension(const c_matrix<double,DIM2,CONTRACTED_DIM>& rMatrix, FourthOrderTensor<DIM1,CONTRACTED_DIM,DIM3,DIM4>& rTensor);
101
110 template<unsigned CONTRACTED_DIM>
111 void SetAsContractionOnThirdDimension(const c_matrix<double,DIM3,CONTRACTED_DIM>& rMatrix, FourthOrderTensor<DIM1,DIM2,CONTRACTED_DIM,DIM4>& rTensor);
112
121 template<unsigned CONTRACTED_DIM>
122 void SetAsContractionOnFourthDimension(const c_matrix<double,DIM4,CONTRACTED_DIM>& rMatrix, FourthOrderTensor<DIM1,DIM2,DIM3,CONTRACTED_DIM>& rTensor);
123
132 double& operator()(unsigned M, unsigned N, unsigned P, unsigned Q);
133
137 void Zero();
138
142 std::vector<double>& rGetData()
143 {
144 return mData;
145 }
146};
147
149// Implementation (lots of possibilities for the dimensions so no point with explicit instantiation)
151
152template<unsigned DIM1, unsigned DIM2, unsigned DIM3, unsigned DIM4>
154{
155 unsigned size = DIM1*DIM2*DIM3*DIM4;
156 mData.resize(size, 0.0);
157}
158
159template<unsigned DIM1, unsigned DIM2, unsigned DIM3, unsigned DIM4>
160template<unsigned CONTRACTED_DIM>
162{
163 Zero();
164
165 std::vector<double>::iterator iter = mData.begin();
166 std::vector<double>::iterator other_tensor_iter = rTensor.rGetData().begin();
167
168 for (unsigned d=0; d<DIM4; d++)
169 {
170 for (unsigned c=0; c<DIM3; c++)
171 {
172 for (unsigned b=0; b<DIM2; b++)
173 {
174 for (unsigned a=0; a<DIM1; a++)
175 {
176 for (unsigned N=0; N<CONTRACTED_DIM; N++)
177 {
178 /*
179 * The following just does
180 *
181 * mData[GetVectorIndex(a,b,c,d)] += rMatrix(a,N) * rTensor(N,b,c,d);
182 *
183 * but more efficiently using iterators into the data vector, not
184 * using random access.
185 */
186 *iter += rMatrix(a,N) * *other_tensor_iter;
187 other_tensor_iter++;
188 }
189
190 iter++;
191
192 if (a != DIM1-1)
193 {
194 other_tensor_iter -= CONTRACTED_DIM;
195 }
196 }
197 }
198 }
199 }
200}
201
202template<unsigned DIM1, unsigned DIM2, unsigned DIM3, unsigned DIM4>
203template<unsigned CONTRACTED_DIM>
205{
206 Zero();
207
208 std::vector<double>::iterator iter = mData.begin();
209 std::vector<double>::iterator other_tensor_iter = rTensor.rGetData().begin();
210
211 for (unsigned d=0; d<DIM4; d++)
212 {
213 for (unsigned c=0; c<DIM3; c++)
214 {
215 for (unsigned b=0; b<DIM2; b++)
216 {
217 for (unsigned N=0; N<CONTRACTED_DIM; N++)
218 {
219 for (unsigned a=0; a<DIM1; a++)
220 {
221 /*
222 * The following just does
223 *
224 * mData[GetVectorIndex(a,b,c,d)] += rMatrix(b,N) * rTensor(a,N,c,d);
225 *
226 * but more efficiently using iterators into the data vector, not
227 * using random access.
228 */
229 *iter += rMatrix(b,N) * *other_tensor_iter;
230 iter++;
231 other_tensor_iter++;
232 }
233
234 if (N != CONTRACTED_DIM-1)
235 {
236 iter -= DIM1;
237 }
238 }
239 if (b != DIM2-1)
240 {
241 other_tensor_iter -= CONTRACTED_DIM*DIM1;
242 }
243 }
244 }
245 }
246}
247
248template<unsigned DIM1, unsigned DIM2, unsigned DIM3, unsigned DIM4>
249template<unsigned CONTRACTED_DIM>
251{
252 Zero();
253
254 std::vector<double>::iterator iter = mData.begin();
255 std::vector<double>::iterator other_tensor_iter = rTensor.rGetData().begin();
256
257 for (unsigned d=0; d<DIM4; d++)
258 {
259 for (unsigned c=0; c<DIM3; c++)
260 {
261 for (unsigned N=0; N<CONTRACTED_DIM; N++)
262 {
263 for (unsigned b=0; b<DIM2; b++)
264 {
265 for (unsigned a=0; a<DIM1; a++)
266 {
267 /*
268 * The following just does
269 *
270 * mData[GetVectorIndex(a,b,c,d)] += rMatrix(c,N) * rTensor(a,b,N,d);
271 *
272 * but more efficiently using iterators into the data vector, not
273 * using random access.
274 */
275 *iter += rMatrix(c,N) * *other_tensor_iter;
276 iter++;
277 other_tensor_iter++;
278 }
279 }
280
281 if (N != CONTRACTED_DIM-1)
282 {
283 iter -= DIM1*DIM2;
284 }
285 }
286
287 if (c != DIM3-1)
288 {
289 other_tensor_iter -= CONTRACTED_DIM*DIM1*DIM2;
290 }
291 }
292 }
293}
294
295template<unsigned DIM1, unsigned DIM2, unsigned DIM3, unsigned DIM4>
296template<unsigned CONTRACTED_DIM>
298{
299 Zero();
300
301 std::vector<double>::iterator iter = mData.begin();
302 std::vector<double>::iterator other_tensor_iter = rTensor.rGetData().begin();
303
304 for (unsigned d=0; d<DIM4; d++)
305 {
306 for (unsigned N=0; N<CONTRACTED_DIM; N++)
307 {
308 for (unsigned c=0; c<DIM3; c++)
309 {
310 for (unsigned b=0; b<DIM2; b++)
311 {
312 for (unsigned a=0; a<DIM1; a++)
313 {
314 /*
315 * The following just does
316 *
317 * mData[GetVectorIndex(a,b,c,d)] += rMatrix(d,N) * rTensor(a,b,c,N);
318 *
319 * but more efficiently using iterators into the data vector, not
320 * using random access.
321 */
322 *iter += rMatrix(d,N) * *other_tensor_iter;
323
324 iter++;
325 other_tensor_iter++;
326 }
327 }
328 }
329
330 if (N != CONTRACTED_DIM-1)
331 {
332 iter-= DIM1*DIM2*DIM3;
333 }
334 }
335
336 other_tensor_iter -= CONTRACTED_DIM*DIM1*DIM2*DIM3;
337 }
338}
339
340template<unsigned DIM1, unsigned DIM2, unsigned DIM3, unsigned DIM4>
341double& FourthOrderTensor<DIM1,DIM2,DIM3,DIM4>::operator()(unsigned M, unsigned N, unsigned P, unsigned Q)
342{
343 assert(M<DIM1);
344 assert(N<DIM2);
345 assert(P<DIM3);
346 assert(Q<DIM4);
347
348 return mData[GetVectorIndex(M,N,P,Q)];
349}
350
351template<unsigned DIM1, unsigned DIM2, unsigned DIM3, unsigned DIM4>
353{
354 for (unsigned i=0; i<mData.size(); i++)
355 {
356 mData[i] = 0.0;
357 }
358}
359
360#endif //_FOURTHORDERTENSOR_HPP_
double & operator()(unsigned M, unsigned N, unsigned P, unsigned Q)
std::vector< double > & rGetData()
std::vector< double > mData
unsigned GetVectorIndex(unsigned M, unsigned N, unsigned P, unsigned Q)
void SetAsContractionOnSecondDimension(const c_matrix< double, DIM2, CONTRACTED_DIM > &rMatrix, FourthOrderTensor< DIM1, CONTRACTED_DIM, DIM3, DIM4 > &rTensor)
void SetAsContractionOnFourthDimension(const c_matrix< double, DIM4, CONTRACTED_DIM > &rMatrix, FourthOrderTensor< DIM1, DIM2, DIM3, CONTRACTED_DIM > &rTensor)
void SetAsContractionOnFirstDimension(const c_matrix< double, DIM1, CONTRACTED_DIM > &rMatrix, FourthOrderTensor< CONTRACTED_DIM, DIM2, DIM3, DIM4 > &rTensor)
void SetAsContractionOnThirdDimension(const c_matrix< double, DIM3, CONTRACTED_DIM > &rMatrix, FourthOrderTensor< DIM1, DIM2, CONTRACTED_DIM, DIM4 > &rTensor)