GRASS GIS 8 Programmer's Manual  8.5.0dev(2024)-36359e2344
InterpSpline.c
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1 /***********************************************************************
2  *
3  * MODULE: lidarlib
4  *
5  * AUTHOR(S): Roberto Antolin
6  *
7  * PURPOSE: LIDAR Spline Interpolation
8  *
9  * COPYRIGHT: (C) 2006 by Politecnico di Milano -
10  * Polo Regionale di Como
11  *
12  * This program is free software under the
13  * GNU General Public License (>=v2).
14  * Read the file COPYING that comes with GRASS
15  * for details.
16  *
17  **************************************************************************/
18 
19 #include <stdio.h>
20 #include <stdlib.h>
21 #include <float.h>
22 #include <math.h>
23 #include <string.h>
24 #include <grass/lidar.h>
25 
26 /*----------------------------------------------------------------------------*/
27 /* Abscissa node index computation */
28 
29 void node_x(double x, int *i_x, double *csi_x, double xMin, double deltaX)
30 {
31 
32  *i_x = (int)((x - xMin) / deltaX);
33  *csi_x = (double)((x - xMin) - (*i_x * deltaX));
34 
35  return;
36 }
37 
38 /*----------------------------------------------------------------------------*/
39 /* Ordinate node index computation */
40 
41 void node_y(double y, int *i_y, double *csi_y, double yMin, double deltaY)
42 {
43 
44  *i_y = (int)((y - yMin) / deltaY);
45  *csi_y = (double)((y - yMin) - (*i_y * deltaY));
46 
47  return;
48 }
49 
50 /*----------------------------------------------------------------------------*/
51 /* Node order computation */
52 
53 int order(int i_x, int i_y, int yNum)
54 {
55 
56  return (i_y + i_x * yNum);
57 }
58 
59 /*----------------------------------------------------------------------------*/
60 /* Design matrix coefficients computation */
61 
62 double phi_3(double csi)
63 {
64 
65  return ((pow(2 - csi, 3.) - pow(1 - csi, 3.) * 4) / 6.);
66 }
67 
68 double phi_4(double csi)
69 {
70 
71  return (pow(2 - csi, 3.) / 6.);
72 }
73 
74 double phi_33(double csi_x, double csi_y)
75 {
76 
77  return (phi_3(csi_x) * phi_3(csi_y));
78 }
79 
80 double phi_34(double csi_x, double csi_y)
81 {
82 
83  return (phi_3(csi_x) * phi_4(csi_y));
84 }
85 
86 double phi_43(double csi_x, double csi_y)
87 {
88 
89  return (phi_4(csi_x) * phi_3(csi_y));
90 }
91 
92 double phi_44(double csi_x, double csi_y)
93 {
94 
95  return (phi_4(csi_x) * phi_4(csi_y));
96 }
97 
98 double phi(double csi_x, double csi_y)
99 {
100 
101  return ((1 - csi_x) * (1 - csi_y));
102 }
103 
104 /*----------------------------------------------------------------------------*/
105 /* Normal system computation for bicubic spline interpolation */
106 
107 void normalDefBicubic(double **N, double *TN, double *Q, double **obsVect,
108  double deltaX, double deltaY, int xNum, int yNum,
109  double xMin, double yMin, int obsNum, int parNum, int BW)
110 {
111 
112  int i, k, h, m, n, n0; /* counters */
113  double alpha[4][4]; /* coefficients */
114 
115  int i_x; /* x = (xMin + (i_x * deltaX) + csi_x) */
116  double csi_x;
117 
118  int i_y; /* y = (yMin + (i_y * deltaY) + csi_y) */
119  double csi_y;
120 
121  /*--------------------------------------*/
122  for (k = 0; k < parNum; k++) {
123  for (h = 0; h < BW; h++)
124  N[k][h] = 0.; /* Normal matrix inizialization */
125  TN[k] = 0.; /* Normal vector inizialization */
126  }
127 
128  /*--------------------------------------*/
129 
130  for (i = 0; i < obsNum; i++) {
131 
132  node_x(obsVect[i][0], &i_x, &csi_x, xMin, deltaX);
133  node_y(obsVect[i][1], &i_y, &csi_y, yMin, deltaY);
134 
135  if ((i_x >= -2) && (i_x <= xNum) && (i_y >= -2) && (i_y <= yNum)) {
136 
137  csi_x = csi_x / deltaX;
138  csi_y = csi_y / deltaY;
139 
140  alpha[0][0] = phi_44(1 + csi_x, 1 + csi_y);
141  alpha[0][1] = phi_43(1 + csi_x, csi_y);
142  alpha[0][2] = phi_43(1 + csi_x, 1 - csi_y);
143  alpha[0][3] = phi_44(1 + csi_x, 2 - csi_y);
144 
145  alpha[1][0] = phi_34(csi_x, 1 + csi_y);
146  alpha[1][1] = phi_33(csi_x, csi_y);
147  alpha[1][2] = phi_33(csi_x, 1 - csi_y);
148  alpha[1][3] = phi_34(csi_x, 2 - csi_y);
149 
150  alpha[2][0] = phi_34(1 - csi_x, 1 + csi_y);
151  alpha[2][1] = phi_33(1 - csi_x, csi_y);
152  alpha[2][2] = phi_33(1 - csi_x, 1 - csi_y);
153  alpha[2][3] = phi_34(1 - csi_x, 2 - csi_y);
154 
155  alpha[3][0] = phi_44(2 - csi_x, 1 + csi_y);
156  alpha[3][1] = phi_43(2 - csi_x, csi_y);
157  alpha[3][2] = phi_43(2 - csi_x, 1 - csi_y);
158  alpha[3][3] = phi_44(2 - csi_x, 2 - csi_y);
159 
160  for (k = -1; k <= 2; k++) {
161  for (h = -1; h <= 2; h++) {
162 
163  if (((i_x + k) >= 0) && ((i_x + k) < xNum) &&
164  ((i_y + h) >= 0) && ((i_y + h) < yNum)) {
165  for (m = k; m <= 2; m++) {
166 
167  if (m == k)
168  n0 = h;
169  else
170  n0 = -1;
171 
172  for (n = n0; n <= 2; n++) {
173  if (((i_x + m) >= 0) && ((i_x + m) < xNum) &&
174  ((i_y + n) >= 0) && ((i_y + n) < yNum)) {
175  N[order(i_x + k, i_y + h, yNum)]
176  [order(i_x + m, i_y + n, yNum) -
177  order(i_x + k, i_y + h, yNum)] +=
178  alpha[k + 1][h + 1] * (1 / Q[i]) *
179  alpha[m + 1][n + 1];
180  /* 1/Q[i] only refers to the variances */
181  }
182  }
183  }
184  TN[order(i_x + k, i_y + h, yNum)] +=
185  obsVect[i][2] * (1 / Q[i]) * alpha[k + 1][h + 1];
186  }
187  }
188  }
189  }
190  }
191 
192  return;
193 }
194 
195 /*----------------------------------------------------------------------------*/
196 /* Normal system correction - Introduzione della correzione dovuta alle
197  pseudosservazioni (Tykonov) - LAPALCIANO - */
198 
199 void nCorrectLapl(double **N, double lambda, int xNum, int yNum, double deltaX,
200  double deltaY)
201 {
202 
203  int i_x, i_y; /* counters */
204  int k, h, m, n, n0; /* counters */
205 
206  double alpha[5][5]; /* coefficients */
207 
208  double lambdaX, lambdaY;
209 
210  /*--------------------------------------*/
211  lambdaX = lambda * (deltaY / deltaX);
212  lambdaY = lambda * (deltaX / deltaY);
213 
214  alpha[0][0] = 0;
215  alpha[0][1] =
216  lambdaX *
217  (1 / 36.); /* There is lambda because Q^(-1) contains 1/(1/lambda) */
218  alpha[0][2] = lambdaX * (1 / 9.);
219  alpha[0][3] = lambdaX * (1 / 36.);
220  alpha[0][4] = 0;
221 
222  alpha[1][0] = lambdaY * (1 / 36.);
223  alpha[1][1] = lambdaX * (1 / 18.) + lambdaY * (1 / 18.);
224  alpha[1][2] = lambdaX * (2 / 9.) - lambdaY * (1 / 6.);
225  alpha[1][3] = lambdaX * (1 / 18.) + lambdaY * (1 / 18.);
226  alpha[1][4] = lambdaY * (1 / 36.);
227 
228  alpha[2][0] = lambdaY * (1 / 9.);
229  alpha[2][1] = -lambdaX * (1 / 6.) + lambdaY * (2 / 9.);
230  alpha[2][2] = -lambdaX * (2 / 3.) - lambdaY * (2 / 3.);
231  alpha[2][3] = -lambdaX * (1 / 6.) + lambdaY * (2 / 9.);
232  alpha[2][4] = lambdaY * (1 / 9.);
233 
234  alpha[3][0] = lambdaY * (1 / 36.);
235  alpha[3][1] = lambdaX * (1 / 18.) + lambdaY * (1 / 18.);
236  alpha[3][2] = lambdaX * (2 / 9.) - lambdaY * (1 / 6.);
237  alpha[3][3] = lambdaX * (1 / 18.) + lambdaY * (1 / 18.);
238  alpha[3][4] = lambdaY * (1 / 36.);
239 
240  alpha[4][0] = 0;
241  alpha[4][1] = lambdaX * (1 / 36.);
242  alpha[4][2] = lambdaX * (1 / 9.);
243  alpha[4][3] = lambdaX * (1 / 36.);
244  alpha[4][4] = 0;
245 
246  for (i_x = 0; i_x < xNum; i_x++) {
247  for (i_y = 0; i_y < yNum; i_y++) {
248 
249  for (k = -2; k <= 2; k++) {
250  for (h = -2; h <= 2; h++) {
251 
252  if (((i_x + k) >= 0) && ((i_x + k) < xNum) &&
253  ((i_y + h) >= 0) && ((i_y + h) < yNum)) {
254 
255  for (m = k; m <= 2; m++) {
256 
257  if (m == k)
258  n0 = h;
259  else
260  n0 = -2;
261 
262  for (n = n0; n <= 2; n++) {
263  if (((i_x + m) >= 0) &&
264  ((i_x + m) <= (xNum - 1)) &&
265  ((i_y + n) >= 0) &&
266  ((i_y + n) <= (yNum - 1))) {
267 
268  if ((alpha[k + 2][h + 2] != 0) &&
269  (alpha[m + 2][n + 2] != 0)) {
270  N[order(i_x + k, i_y + h, yNum)]
271  [order(i_x + m, i_y + n, yNum) -
272  order(i_x + k, i_y + h, yNum)] +=
273  alpha[k + 2][h + 2] *
274  alpha[m + 2][n + 2];
275  }
276  }
277  }
278  }
279  }
280  }
281  }
282  }
283  }
284 
285  return;
286 }
287 
288 /*----------------------------------------------------------------------------*/
289 /* Normal system computation for bilinear spline interpolation */
290 
291 void normalDefBilin(double **N, double *TN, double *Q, double **obsVect,
292  double deltaX, double deltaY, int xNum, int yNum,
293  double xMin, double yMin, int obsNum, int parNum, int BW)
294 {
295 
296  int i, k, h, m, n, n0; /* counters */
297  double alpha[2][2]; /* coefficients */
298 
299  int i_x; /* x = (xMin + (i_x * deltaX) + csi_x) */
300  double csi_x;
301 
302  int i_y; /* y = (yMin + (i_y * deltaY) + csi_y) */
303  double csi_y;
304 
305  /*--------------------------------------*/
306  for (k = 0; k < parNum; k++) {
307  for (h = 0; h < BW; h++)
308  N[k][h] = 0.; /* Normal matrix inizialization */
309  TN[k] = 0.; /* Normal vector inizialization */
310  }
311 
312  /*--------------------------------------*/
313 
314  for (i = 0; i < obsNum; i++) {
315 
316  node_x(obsVect[i][0], &i_x, &csi_x, xMin, deltaX);
317  node_y(obsVect[i][1], &i_y, &csi_y, yMin, deltaY);
318 
319  if ((i_x >= -1) && (i_x < xNum) && (i_y >= -1) && (i_y < yNum)) {
320 
321  csi_x = csi_x / deltaX;
322  csi_y = csi_y / deltaY;
323 
324  alpha[0][0] = phi(csi_x, csi_y);
325  alpha[0][1] = phi(csi_x, 1 - csi_y);
326  alpha[1][0] = phi(1 - csi_x, csi_y);
327  alpha[1][1] = phi(1 - csi_x, 1 - csi_y);
328 
329  for (k = 0; k <= 1; k++) {
330  for (h = 0; h <= 1; h++) {
331 
332  if (((i_x + k) >= 0) && ((i_x + k) <= (xNum - 1)) &&
333  ((i_y + h) >= 0) && ((i_y + h) <= (yNum - 1))) {
334 
335  for (m = k; m <= 1; m++) {
336  if (m == k)
337  n0 = h;
338  else
339  n0 = 0;
340 
341  for (n = n0; n <= 1; n++) {
342  if (((i_x + m) >= 0) && ((i_x + m) < xNum) &&
343  ((i_y + n) >= 0) && ((i_y + n) < yNum)) {
344  N[order(i_x + k, i_y + h, yNum)]
345  [order(i_x + m, i_y + n, yNum) -
346  order(i_x + k, i_y + h, yNum)] +=
347  alpha[k][h] * (1 / Q[i]) * alpha[m][n];
348  /* 1/Q[i] only refers to the variances */
349  }
350  }
351  }
352  TN[order(i_x + k, i_y + h, yNum)] +=
353  obsVect[i][2] * (1 / Q[i]) * alpha[k][h];
354  }
355  }
356  }
357  }
358  }
359 
360  return;
361 }
362 
363 /*----------------------------------------------------------------------------*/
364 /* Normal system correction - Introduzione della correzione dovuta alle
365  pseudosservazioni (Tykonov) - GRADIENTE - */
366 #ifdef notdef
367 void nCorrectGrad(double **N, double lambda, int xNum, int yNum, double deltaX,
368  double deltaY)
369 {
370 
371  int i;
372  int parNum;
373 
374  double alpha[3];
375  double lambdaX, lambdaY;
376 
377  lambdaX = lambda * (deltaY / deltaX);
378  lambdaY = lambda * (deltaX / deltaY);
379 
380  parNum = xNum * yNum;
381 
382  alpha[0] = lambdaX / 2. + lambdaY / 2.;
383  alpha[1] = -lambdaX / 4.;
384  alpha[2] = -lambdaY / 4.;
385 
386  for (i = 0; i < parNum; i++) {
387  N[i][0] += alpha[0];
388 
389  if ((i + 2) < parNum)
390  N[i][2] += alpha[2];
391 
392  if ((i + 2 * yNum) < parNum)
393  N[i][2 * yNum] += alpha[1];
394  }
395 }
396 #endif
397 
398 /*1-DELTA discretization */
399 void nCorrectGrad(double **N, double lambda, int xNum, int yNum, double deltaX,
400  double deltaY)
401 {
402 
403  int i;
404  int parNum;
405 
406  double alpha[3];
407  double lambdaX, lambdaY;
408 
409  lambdaX = lambda * (deltaY / deltaX);
410  lambdaY = lambda * (deltaX / deltaY);
411 
412  parNum = xNum * yNum;
413 
414  alpha[0] = 2 * lambdaX + 2 * lambdaY;
415  alpha[1] = -lambdaX;
416  alpha[2] = -lambdaY;
417 
418  for (i = 0; i < parNum; i++) {
419  N[i][0] += alpha[0];
420 
421  if ((i + 1) < parNum)
422  N[i][1] += alpha[2];
423 
424  if ((i + 1 * yNum) < parNum)
425  N[i][1 * yNum] += alpha[1];
426  }
427 
428  return;
429 }
430 
431 /*----------------------------------------------------------------------------*/
432 /* Observations estimation */
433 
434 void obsEstimateBicubic(double **obsV, double *obsE, double *parV, double deltX,
435  double deltY, int xNm, int yNm, double xMi, double yMi,
436  int obsN)
437 {
438 
439  int i, k, h; /* counters */
440  double alpha[4][4]; /* coefficients */
441 
442  int i_x; /* x = (xMin + (i_x * deltaX) + csi_x) */
443  double csi_x;
444 
445  int i_y; /* y = (yMin + (i_y * deltaY) + csi_y) */
446  double csi_y;
447 
448  for (i = 0; i < obsN; i++) {
449 
450  obsE[i] = 0;
451 
452  node_x(obsV[i][0], &i_x, &csi_x, xMi, deltX);
453  node_y(obsV[i][1], &i_y, &csi_y, yMi, deltY);
454 
455  if ((i_x >= -2) && (i_x <= xNm) && (i_y >= -2) && (i_y <= yNm)) {
456 
457  csi_x = csi_x / deltX;
458  csi_y = csi_y / deltY;
459 
460  alpha[0][0] = phi_44(1 + csi_x, 1 + csi_y);
461  alpha[0][1] = phi_43(1 + csi_x, csi_y);
462  alpha[0][2] = phi_43(1 + csi_x, 1 - csi_y);
463  alpha[0][3] = phi_44(1 + csi_x, 2 - csi_y);
464 
465  alpha[1][0] = phi_34(csi_x, 1 + csi_y);
466  alpha[1][1] = phi_33(csi_x, csi_y);
467  alpha[1][2] = phi_33(csi_x, 1 - csi_y);
468  alpha[1][3] = phi_34(csi_x, 2 - csi_y);
469 
470  alpha[2][0] = phi_34(1 - csi_x, 1 + csi_y);
471  alpha[2][1] = phi_33(1 - csi_x, csi_y);
472  alpha[2][2] = phi_33(1 - csi_x, 1 - csi_y);
473  alpha[2][3] = phi_34(1 - csi_x, 2 - csi_y);
474 
475  alpha[3][0] = phi_44(2 - csi_x, 1 + csi_y);
476  alpha[3][1] = phi_43(2 - csi_x, csi_y);
477  alpha[3][2] = phi_43(2 - csi_x, 1 - csi_y);
478  alpha[3][3] = phi_44(2 - csi_x, 2 - csi_y);
479 
480  for (k = -1; k <= 2; k++) {
481  for (h = -1; h <= 2; h++) {
482  if (((i_x + k) >= 0) && ((i_x + k) < xNm) &&
483  ((i_y + h) >= 0) && ((i_y + h) < yNm))
484  obsE[i] += parV[order(i_x + k, i_y + h, yNm)] *
485  alpha[k + 1][h + 1];
486  }
487  }
488  }
489  }
490 
491  return;
492 }
493 
494 /*--------------------------------------------------------------------------------------*/
495 /* Data interpolation in a generic point */
496 
497 double dataInterpolateBicubic(double x, double y, double deltaX, double deltaY,
498  int xNum, int yNum, double xMin, double yMin,
499  double *parVect)
500 {
501 
502  double z; /* abscissa, ordinate and associated value */
503 
504  int k, h; /* counters */
505  double alpha[4][4]; /* coefficients */
506 
507  int i_x, i_y; /* x = (xMin + (i_x * deltaX) + csi_x) */
508  double csi_x, csi_y; /* y = (yMin + (i_y * deltaY) + csi_y) */
509 
510  z = 0;
511 
512  node_x(x, &i_x, &csi_x, xMin, deltaX);
513  node_y(y, &i_y, &csi_y, yMin, deltaY);
514 
515  if ((i_x >= -2) && (i_x <= xNum) && (i_y >= -2) && (i_y <= yNum)) {
516 
517  csi_x = csi_x / deltaX;
518  csi_y = csi_y / deltaY;
519 
520  alpha[0][0] = phi_44(1 + csi_x, 1 + csi_y);
521  alpha[0][1] = phi_43(1 + csi_x, csi_y);
522  alpha[0][2] = phi_43(1 + csi_x, 1 - csi_y);
523  alpha[0][3] = phi_44(1 + csi_x, 2 - csi_y);
524 
525  alpha[1][0] = phi_34(csi_x, 1 + csi_y);
526  alpha[1][1] = phi_33(csi_x, csi_y);
527  alpha[1][2] = phi_33(csi_x, 1 - csi_y);
528  alpha[1][3] = phi_34(csi_x, 2 - csi_y);
529 
530  alpha[2][0] = phi_34(1 - csi_x, 1 + csi_y);
531  alpha[2][1] = phi_33(1 - csi_x, csi_y);
532  alpha[2][2] = phi_33(1 - csi_x, 1 - csi_y);
533  alpha[2][3] = phi_34(1 - csi_x, 2 - csi_y);
534 
535  alpha[3][0] = phi_44(2 - csi_x, 1 + csi_y);
536  alpha[3][1] = phi_43(2 - csi_x, csi_y);
537  alpha[3][2] = phi_43(2 - csi_x, 1 - csi_y);
538  alpha[3][3] = phi_44(2 - csi_x, 2 - csi_y);
539 
540  for (k = -1; k <= 2; k++) {
541  for (h = -1; h <= 2; h++) {
542  if (((i_x + k) >= 0) && ((i_x + k) < xNum) &&
543  ((i_y + h) >= 0) && ((i_y + h) < yNum))
544  z += parVect[order(i_x + k, i_y + h, yNum)] *
545  alpha[k + 1][h + 1];
546  }
547  }
548  }
549 
550  return z;
551 }
552 
553 /*----------------------------------------------------------------------------*/
554 /* Observations estimation */
555 
556 void obsEstimateBilin(double **obsV, double *obsE, double *parV, double deltX,
557  double deltY, int xNm, int yNm, double xMi, double yMi,
558  int obsN)
559 {
560 
561  int i, k, h; /* counters */
562  double alpha[2][2]; /* coefficients */
563 
564  int i_x; /* x = (xMin + (i_x * deltaX) + csi_x) */
565  double csi_x;
566 
567  int i_y; /* y = (yMin + (i_y * deltaY) + csi_y) */
568  double csi_y;
569 
570  for (i = 0; i < obsN; i++) {
571 
572  obsE[i] = 0;
573 
574  node_x(obsV[i][0], &i_x, &csi_x, xMi, deltX);
575  node_y(obsV[i][1], &i_y, &csi_y, yMi, deltY);
576 
577  if ((i_x >= -1) && (i_x < xNm) && (i_y >= -1) && (i_y < yNm)) {
578 
579  csi_x = csi_x / deltX;
580  csi_y = csi_y / deltY;
581 
582  alpha[0][0] = phi(csi_x, csi_y);
583  alpha[0][1] = phi(csi_x, 1 - csi_y);
584  alpha[1][0] = phi(1 - csi_x, csi_y);
585  alpha[1][1] = phi(1 - csi_x, 1 - csi_y);
586 
587  for (k = 0; k <= 1; k++) {
588  for (h = 0; h <= 1; h++) {
589  if (((i_x + k) >= 0) && ((i_x + k) < xNm) &&
590  ((i_y + h) >= 0) && ((i_y + h) < yNm))
591  obsE[i] +=
592  parV[order(i_x + k, i_y + h, yNm)] * alpha[k][h];
593  }
594  }
595  }
596  }
597 
598  return;
599 }
600 
601 /*--------------------------------------------------------------------------------------*/
602 /* Data interpolation in a generic point */
603 
604 double dataInterpolateBilin(double x, double y, double deltaX, double deltaY,
605  int xNum, int yNum, double xMin, double yMin,
606  double *parVect)
607 {
608 
609  double z; /* abscissa, ordinate and associated value */
610 
611  int k, h; /* counters */
612  double alpha[2][2]; /* coefficients */
613 
614  int i_x, i_y; /* x = (xMin + (i_x * deltaX) + csi_x) */
615  double csi_x, csi_y; /* y = (yMin + (i_y * deltaY) + csi_y) */
616 
617  z = 0;
618 
619  node_x(x, &i_x, &csi_x, xMin, deltaX);
620  node_y(y, &i_y, &csi_y, yMin, deltaY);
621 
622  if ((i_x >= -1) && (i_x < xNum) && (i_y >= -1) && (i_y < yNum)) {
623 
624  csi_x = csi_x / deltaX;
625  csi_y = csi_y / deltaY;
626 
627  alpha[0][0] = phi(csi_x, csi_y);
628  alpha[0][1] = phi(csi_x, 1 - csi_y);
629 
630  alpha[1][0] = phi(1 - csi_x, csi_y);
631  alpha[1][1] = phi(1 - csi_x, 1 - csi_y);
632 
633  for (k = 0; k <= 1; k++) {
634  for (h = 0; h <= 1; h++) {
635  if (((i_x + k) >= 0) && ((i_x + k) < xNum) &&
636  ((i_y + h) >= 0) && ((i_y + h) < yNum))
637  z += parVect[order(i_x + k, i_y + h, yNum)] * alpha[k][h];
638  }
639  }
640  }
641 
642  return z;
643 }
phi_44
double phi_44(double csi_x, double csi_y)
Definition: InterpSpline.c:92
phi_4
double phi_4(double csi)
Definition: InterpSpline.c:68
dataInterpolateBicubic
double dataInterpolateBicubic(double x, double y, double deltaX, double deltaY, int xNum, int yNum, double xMin, double yMin, double *parVect)
Definition: InterpSpline.c:497
order
int order(int i_x, int i_y, int yNum)
Definition: InterpSpline.c:53
phi_43
double phi_43(double csi_x, double csi_y)
Definition: InterpSpline.c:86
phi_33
double phi_33(double csi_x, double csi_y)
Definition: InterpSpline.c:74
normalDefBicubic
void normalDefBicubic(double **N, double *TN, double *Q, double **obsVect, double deltaX, double deltaY, int xNum, int yNum, double xMin, double yMin, int obsNum, int parNum, int BW)
Definition: InterpSpline.c:107
normalDefBilin
void normalDefBilin(double **N, double *TN, double *Q, double **obsVect, double deltaX, double deltaY, int xNum, int yNum, double xMin, double yMin, int obsNum, int parNum, int BW)
Definition: InterpSpline.c:291
node_y
void node_y(double y, int *i_y, double *csi_y, double yMin, double deltaY)
Definition: InterpSpline.c:41
obsEstimateBilin
void obsEstimateBilin(double **obsV, double *obsE, double *parV, double deltX, double deltY, int xNm, int yNm, double xMi, double yMi, int obsN)
Definition: InterpSpline.c:556
phi_34
double phi_34(double csi_x, double csi_y)
Definition: InterpSpline.c:80
phi_3
double phi_3(double csi)
Definition: InterpSpline.c:62
dataInterpolateBilin
double dataInterpolateBilin(double x, double y, double deltaX, double deltaY, int xNum, int yNum, double xMin, double yMin, double *parVect)
Definition: InterpSpline.c:604
nCorrectGrad
void nCorrectGrad(double **N, double lambda, int xNum, int yNum, double deltaX, double deltaY)
Definition: InterpSpline.c:399
node_x
void node_x(double x, int *i_x, double *csi_x, double xMin, double deltaX)
Definition: InterpSpline.c:29
phi
double phi(double csi_x, double csi_y)
Definition: InterpSpline.c:98
obsEstimateBicubic
void obsEstimateBicubic(double **obsV, double *obsE, double *parV, double deltX, double deltY, int xNm, int yNm, double xMi, double yMi, int obsN)
Definition: InterpSpline.c:434
nCorrectLapl
void nCorrectLapl(double **N, double lambda, int xNum, int yNum, double deltaX, double deltaY)
Definition: InterpSpline.c:199
N
#define N
Definition: e_intersect.c:926
x
#define x