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99adacae | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
10 | * copies and that both the copyright notice and this permission notice * | |
11 | * appear in the supporting documentation. The authors make no claims * | |
12 | * about the suitability of this software for any purpose. It is * | |
13 | * provided "as is" without express or implied warranty. * | |
14 | **************************************************************************/ | |
15 | ||
b09247a2 | 16 | #include <cstdlib> |
5406439e | 17 | #include <TSystem.h> |
ff66b122 | 18 | #include "AliCheb3DCalc.h" |
99adacae | 19 | |
20 | ClassImp(AliCheb3DCalc) | |
21 | ||
40389866 | 22 | //__________________________________________________________________________________________ |
23 | AliCheb3DCalc::AliCheb3DCalc() : | |
24 | fNCoefs(0), | |
25 | fNRows(0), | |
26 | fNCols(0), | |
27 | fNElemBound2D(0), | |
28 | fNColsAtRow(0), | |
29 | fColAtRowBg(0), | |
30 | fCoefBound2D0(0), | |
31 | fCoefBound2D1(0), | |
32 | fCoefs(0), | |
33 | fTmpCf1(0), | |
f69ec3f4 | 34 | fTmpCf0(0), |
35 | fPrec(0) | |
5406439e | 36 | { |
37 | // default constructor | |
38 | } | |
99adacae | 39 | |
40389866 | 40 | //__________________________________________________________________________________________ |
41 | AliCheb3DCalc::AliCheb3DCalc(const AliCheb3DCalc& src) : | |
42 | TNamed(src), | |
43 | fNCoefs(src.fNCoefs), | |
44 | fNRows(src.fNRows), | |
45 | fNCols(src.fNCols), | |
46 | fNElemBound2D(src.fNElemBound2D), | |
47 | fNColsAtRow(0), | |
48 | fColAtRowBg(0), | |
49 | fCoefBound2D0(0), | |
50 | fCoefBound2D1(0), | |
51 | fCoefs(0), | |
52 | fTmpCf1(0), | |
f69ec3f4 | 53 | fTmpCf0(0), |
54 | fPrec(src.fPrec) | |
99adacae | 55 | { |
5406439e | 56 | // copy constructor |
57 | // | |
40389866 | 58 | if (src.fNColsAtRow) { |
1d18ebe0 | 59 | fNColsAtRow = new UShort_t[fNRows]; |
40389866 | 60 | for (int i=fNRows;i--;) fNColsAtRow[i] = src.fNColsAtRow[i]; |
61 | } | |
62 | if (src.fColAtRowBg) { | |
1d18ebe0 | 63 | fColAtRowBg = new UShort_t[fNRows]; |
40389866 | 64 | for (int i=fNRows;i--;) fColAtRowBg[i] = src.fColAtRowBg[i]; |
65 | } | |
66 | if (src.fCoefBound2D0) { | |
1d18ebe0 | 67 | fCoefBound2D0 = new UShort_t[fNElemBound2D]; |
40389866 | 68 | for (int i=fNElemBound2D;i--;) fCoefBound2D0[i] = src.fCoefBound2D0[i]; |
69 | } | |
70 | if (src.fCoefBound2D1) { | |
1d18ebe0 | 71 | fCoefBound2D1 = new UShort_t[fNElemBound2D]; |
40389866 | 72 | for (int i=fNElemBound2D;i--;) fCoefBound2D1[i] = src.fCoefBound2D1[i]; |
73 | } | |
74 | if (src.fCoefs) { | |
75 | fCoefs = new Float_t[fNCoefs]; | |
76 | for (int i=fNCoefs;i--;) fCoefs[i] = src.fCoefs[i]; | |
77 | } | |
78 | if (src.fTmpCf1) fTmpCf1 = new Float_t[fNCols]; | |
79 | if (src.fTmpCf0) fTmpCf0 = new Float_t[fNRows]; | |
99adacae | 80 | } |
81 | ||
40389866 | 82 | //__________________________________________________________________________________________ |
83 | AliCheb3DCalc::AliCheb3DCalc(FILE* stream) : | |
84 | fNCoefs(0), | |
85 | fNRows(0), | |
86 | fNCols(0), | |
87 | fNElemBound2D(0), | |
88 | fNColsAtRow(0), | |
89 | fColAtRowBg(0), | |
90 | fCoefBound2D0(0), | |
91 | fCoefBound2D1(0), | |
92 | fCoefs(0), | |
93 | fTmpCf1(0), | |
f69ec3f4 | 94 | fTmpCf0(0), |
95 | fPrec(0) | |
99adacae | 96 | { |
5406439e | 97 | // constructor from coeffs. streem |
40389866 | 98 | LoadData(stream); |
99adacae | 99 | } |
100 | ||
40389866 | 101 | //__________________________________________________________________________________________ |
102 | AliCheb3DCalc& AliCheb3DCalc::operator=(const AliCheb3DCalc& rhs) | |
99adacae | 103 | { |
5406439e | 104 | // assignment operator |
40389866 | 105 | if (this != &rhs) { |
106 | Clear(); | |
107 | SetName(rhs.GetName()); | |
108 | SetTitle(rhs.GetTitle()); | |
109 | fNCoefs = rhs.fNCoefs; | |
110 | fNRows = rhs.fNRows; | |
111 | fNCols = rhs.fNCols; | |
f69ec3f4 | 112 | fPrec = rhs.fPrec; |
40389866 | 113 | if (rhs.fNColsAtRow) { |
1d18ebe0 | 114 | fNColsAtRow = new UShort_t[fNRows]; |
40389866 | 115 | for (int i=fNRows;i--;) fNColsAtRow[i] = rhs.fNColsAtRow[i]; |
99adacae | 116 | } |
40389866 | 117 | if (rhs.fColAtRowBg) { |
1d18ebe0 | 118 | fColAtRowBg = new UShort_t[fNRows]; |
40389866 | 119 | for (int i=fNRows;i--;) fColAtRowBg[i] = rhs.fColAtRowBg[i]; |
99adacae | 120 | } |
40389866 | 121 | if (rhs.fCoefBound2D0) { |
1d18ebe0 | 122 | fCoefBound2D0 = new UShort_t[fNElemBound2D]; |
40389866 | 123 | for (int i=fNElemBound2D;i--;) fCoefBound2D0[i] = rhs.fCoefBound2D0[i]; |
99adacae | 124 | } |
40389866 | 125 | if (rhs.fCoefBound2D1) { |
1d18ebe0 | 126 | fCoefBound2D1 = new UShort_t[fNElemBound2D]; |
40389866 | 127 | for (int i=fNElemBound2D;i--;) fCoefBound2D1[i] = rhs.fCoefBound2D1[i]; |
99adacae | 128 | } |
40389866 | 129 | if (rhs.fCoefs) { |
130 | fCoefs = new Float_t[fNCoefs]; | |
131 | for (int i=fNCoefs;i--;) fCoefs[i] = rhs.fCoefs[i]; | |
99adacae | 132 | } |
40389866 | 133 | if (rhs.fTmpCf1) fTmpCf1 = new Float_t[fNCols]; |
134 | if (rhs.fTmpCf0) fTmpCf0 = new Float_t[fNRows]; | |
135 | } | |
136 | return *this; | |
99adacae | 137 | } |
138 | ||
139 | //__________________________________________________________________________________________ | |
5406439e | 140 | void AliCheb3DCalc::Clear(const Option_t*) |
99adacae | 141 | { |
142 | // delete all dynamycally allocated structures | |
143 | if (fTmpCf1) { delete[] fTmpCf1; fTmpCf1 = 0;} | |
144 | if (fTmpCf0) { delete[] fTmpCf0; fTmpCf0 = 0;} | |
145 | if (fCoefs) { delete[] fCoefs; fCoefs = 0;} | |
146 | if (fCoefBound2D0) { delete[] fCoefBound2D0; fCoefBound2D0 = 0; } | |
147 | if (fCoefBound2D1) { delete[] fCoefBound2D1; fCoefBound2D1 = 0; } | |
148 | if (fNColsAtRow) { delete[] fNColsAtRow; fNColsAtRow = 0; } | |
149 | if (fColAtRowBg) { delete[] fColAtRowBg; fColAtRowBg = 0; } | |
150 | // | |
151 | } | |
152 | ||
99adacae | 153 | //__________________________________________________________________________________________ |
5406439e | 154 | void AliCheb3DCalc::Print(const Option_t* ) const |
99adacae | 155 | { |
5406439e | 156 | // print info |
f69ec3f4 | 157 | printf("Chebyshev parameterization data %s for 3D->1 function. Prec:%e\n",GetName(),fPrec); |
99adacae | 158 | int nmax3d = 0; |
159 | for (int i=fNElemBound2D;i--;) if (fCoefBound2D0[i]>nmax3d) nmax3d = fCoefBound2D0[i]; | |
160 | printf("%d coefficients in %dx%dx%d matrix\n",fNCoefs,fNRows,fNCols,nmax3d); | |
161 | // | |
162 | } | |
163 | ||
40389866 | 164 | //__________________________________________________________________________________________ |
5406439e | 165 | Float_t AliCheb3DCalc::EvalDeriv(int dim, const Float_t *par) const |
40389866 | 166 | { |
167 | // evaluate Chebyshev parameterization derivative in given dimension for 3D function. | |
168 | // VERY IMPORTANT: par must contain the function arguments ALREADY MAPPED to [-1:1] interval | |
40389866 | 169 | // |
170 | int ncfRC; | |
171 | for (int id0=fNRows;id0--;) { | |
172 | int nCLoc = fNColsAtRow[id0]; // number of significant coefs on this row | |
1cf34ee8 | 173 | if (!nCLoc) {fTmpCf0[id0]=0; continue;} |
174 | // | |
5406439e | 175 | int col0 = fColAtRowBg[id0]; // beginning of local column in the 2D boundary matrix |
40389866 | 176 | for (int id1=nCLoc;id1--;) { |
5406439e | 177 | int id = id1+col0; |
1cf34ee8 | 178 | if (!(ncfRC=fCoefBound2D0[id])) { fTmpCf1[id1]=0; continue;} |
ff66b122 | 179 | if (dim==2) fTmpCf1[id1] = ChebEval1Deriv(par[2],fCoefs + fCoefBound2D1[id], ncfRC); |
180 | else fTmpCf1[id1] = ChebEval1D(par[2],fCoefs + fCoefBound2D1[id], ncfRC); | |
40389866 | 181 | } |
ff66b122 | 182 | if (dim==1) fTmpCf0[id0] = ChebEval1Deriv(par[1],fTmpCf1,nCLoc); |
183 | else fTmpCf0[id0] = ChebEval1D(par[1],fTmpCf1,nCLoc); | |
40389866 | 184 | } |
ff66b122 | 185 | return (dim==0) ? ChebEval1Deriv(par[0],fTmpCf0,fNRows) : ChebEval1D(par[0],fTmpCf0,fNRows); |
40389866 | 186 | // |
187 | } | |
188 | ||
1cf34ee8 | 189 | //__________________________________________________________________________________________ |
5406439e | 190 | Float_t AliCheb3DCalc::EvalDeriv2(int dim1,int dim2, const Float_t *par) const |
1cf34ee8 | 191 | { |
192 | // evaluate Chebyshev parameterization 2n derivative in given dimensions for 3D function. | |
193 | // VERY IMPORTANT: par must contain the function arguments ALREADY MAPPED to [-1:1] interval | |
1cf34ee8 | 194 | // |
195 | Bool_t same = dim1==dim2; | |
196 | int ncfRC; | |
197 | for (int id0=fNRows;id0--;) { | |
198 | int nCLoc = fNColsAtRow[id0]; // number of significant coefs on this row | |
199 | if (!nCLoc) {fTmpCf0[id0]=0; continue;} | |
200 | // | |
5406439e | 201 | int col0 = fColAtRowBg[id0]; // beginning of local column in the 2D boundary matrix |
1cf34ee8 | 202 | for (int id1=nCLoc;id1--;) { |
5406439e | 203 | int id = id1+col0; |
1cf34ee8 | 204 | if (!(ncfRC=fCoefBound2D0[id])) { fTmpCf1[id1]=0; continue;} |
ff66b122 | 205 | if (dim1==2||dim2==2) fTmpCf1[id1] = same ? ChebEval1Deriv2(par[2],fCoefs + fCoefBound2D1[id], ncfRC) |
206 | : ChebEval1Deriv(par[2],fCoefs + fCoefBound2D1[id], ncfRC); | |
207 | else fTmpCf1[id1] = ChebEval1D(par[2],fCoefs + fCoefBound2D1[id], ncfRC); | |
1cf34ee8 | 208 | } |
ff66b122 | 209 | if (dim1==1||dim2==1) fTmpCf0[id0] = same ? ChebEval1Deriv2(par[1],fTmpCf1,nCLoc):ChebEval1Deriv(par[1],fTmpCf1,nCLoc); |
210 | else fTmpCf0[id0] = ChebEval1D(par[1],fTmpCf1,nCLoc); | |
1cf34ee8 | 211 | } |
ff66b122 | 212 | return (dim1==0||dim2==0) ? (same ? ChebEval1Deriv2(par[0],fTmpCf0,fNRows):ChebEval1Deriv(par[0],fTmpCf0,fNRows)) : |
213 | ChebEval1D(par[0],fTmpCf0,fNRows); | |
1cf34ee8 | 214 | // |
215 | } | |
216 | ||
99adacae | 217 | //_______________________________________________ |
218 | #ifdef _INC_CREATION_ALICHEB3D_ | |
219 | void AliCheb3DCalc::SaveData(const char* outfile,Bool_t append) const | |
220 | { | |
221 | // writes coefficients data to output text file, optionallt appending on the end of existing file | |
222 | TString strf = outfile; | |
223 | gSystem->ExpandPathName(strf); | |
224 | FILE* stream = fopen(strf,append ? "a":"w"); | |
225 | SaveData(stream); | |
226 | fclose(stream); | |
227 | // | |
228 | } | |
229 | #endif | |
230 | ||
231 | //_______________________________________________ | |
232 | #ifdef _INC_CREATION_ALICHEB3D_ | |
233 | void AliCheb3DCalc::SaveData(FILE* stream) const | |
234 | { | |
235 | // writes coefficients data to existing output stream | |
236 | // Note: fNCols, fNElemBound2D and fColAtRowBg is not stored, will be computed on fly during the loading of this file | |
237 | fprintf(stream,"#\nSTART %s\n",GetName()); | |
238 | fprintf(stream,"# Number of rows\n%d\n",fNRows); | |
239 | // | |
240 | fprintf(stream,"# Number of columns per row\n"); | |
241 | for (int i=0;i<fNRows;i++) fprintf(stream,"%d\n",fNColsAtRow[i]); | |
242 | // | |
243 | fprintf(stream,"# Number of Coefs in each significant block of third dimension\n"); | |
244 | for (int i=0;i<fNElemBound2D;i++) fprintf(stream,"%d\n",fCoefBound2D0[i]); | |
245 | // | |
246 | fprintf(stream,"# Coefficients\n"); | |
247 | for (int i=0;i<fNCoefs;i++) fprintf(stream,"%+.8e\n",fCoefs[i]); | |
f69ec3f4 | 248 | // |
249 | fprintf(stream,"# Precision\n"); | |
250 | fprintf(stream,"%+.8e\n",fPrec); | |
251 | // | |
99adacae | 252 | fprintf(stream,"END %s\n",GetName()); |
253 | // | |
254 | } | |
255 | #endif | |
256 | ||
257 | //_______________________________________________ | |
258 | void AliCheb3DCalc::LoadData(FILE* stream) | |
259 | { | |
260 | // Load coefs. from the stream | |
261 | if (!stream) {Error("LoadData","No stream provided.\nStop"); exit(1);} | |
262 | TString buffs; | |
263 | Clear(); | |
264 | ReadLine(buffs,stream); | |
265 | if (!buffs.BeginsWith("START")) {Error("LoadData","Expected: \"START <fit_name>\", found \"%s\"\nStop\n",buffs.Data());exit(1);} | |
266 | if (buffs.First(' ')>0) SetName(buffs.Data()+buffs.First(' ')+1); | |
267 | // | |
268 | ReadLine(buffs,stream); // NRows | |
269 | fNRows = buffs.Atoi(); | |
b39f9e02 | 270 | if (fNRows<0 && !buffs.IsDigit()) {Error("LoadData","Expected: '<number_of_rows>', found \"%s\"\nStop\n",buffs.Data());exit(1);} |
99adacae | 271 | // |
272 | fNCols = 0; | |
273 | fNElemBound2D = 0; | |
274 | InitRows(fNRows); | |
275 | // | |
276 | for (int id0=0;id0<fNRows;id0++) { | |
277 | ReadLine(buffs,stream); // n.cols at this row | |
278 | fNColsAtRow[id0] = buffs.Atoi(); | |
279 | fColAtRowBg[id0] = fNElemBound2D; // begining of this row in 2D boundary surface | |
280 | fNElemBound2D += fNColsAtRow[id0]; | |
281 | if (fNCols<fNColsAtRow[id0]) fNCols = fNColsAtRow[id0]; | |
282 | } | |
283 | InitCols(fNCols); | |
284 | // | |
285 | fNCoefs = 0; | |
286 | InitElemBound2D(fNElemBound2D); | |
287 | // | |
288 | for (int i=0;i<fNElemBound2D;i++) { | |
289 | ReadLine(buffs,stream); // n.coeffs at 3-d dimension for the given column/row | |
290 | fCoefBound2D0[i] = buffs.Atoi(); | |
291 | fCoefBound2D1[i] = fNCoefs; | |
292 | fNCoefs += fCoefBound2D0[i]; | |
293 | } | |
294 | // | |
b39f9e02 | 295 | // if (fNCoefs<=0) {Error("LoadData","Negtive (%d) number of Chebychef coeffs. is obtained.\nStop\n",fNCoefs);exit(1);} |
99adacae | 296 | // |
297 | InitCoefs(fNCoefs); | |
298 | for (int i=0;i<fNCoefs;i++) { | |
299 | ReadLine(buffs,stream); | |
300 | fCoefs[i] = buffs.Atof(); | |
301 | } | |
f69ec3f4 | 302 | // |
303 | // read precision | |
304 | ReadLine(buffs,stream); | |
305 | fPrec = buffs.Atof(); | |
306 | // | |
99adacae | 307 | // check end_of_data record |
308 | ReadLine(buffs,stream); | |
309 | if (!buffs.BeginsWith("END") || !buffs.Contains(GetName())) { | |
310 | Error("LoadData","Expected \"END %s\", found \"%s\".\nStop\n",GetName(),buffs.Data()); | |
311 | exit(1); | |
312 | } | |
313 | // | |
314 | } | |
315 | ||
316 | //_______________________________________________ | |
317 | void AliCheb3DCalc::ReadLine(TString& str,FILE* stream) | |
318 | { | |
319 | // read single line from the stream, skipping empty and commented lines. EOF is not expected | |
320 | while (str.Gets(stream)) { | |
321 | str = str.Strip(TString::kBoth,' '); | |
322 | if (str.IsNull()||str.BeginsWith("#")) continue; | |
323 | return; | |
324 | } | |
325 | fprintf(stderr,"AliCheb3D::ReadLine: Failed to read from stream.\nStop");exit(1); // normally, should not reach here | |
326 | } | |
327 | ||
328 | //_______________________________________________ | |
329 | void AliCheb3DCalc::InitCols(int nc) | |
330 | { | |
331 | // Set max.number of significant columns in the coefs matrix | |
332 | fNCols = nc; | |
b39f9e02 | 333 | if (fTmpCf1) {delete[] fTmpCf1; fTmpCf1 = 0;} |
334 | if (fNCols>0) fTmpCf1 = new Float_t [fNCols]; | |
99adacae | 335 | } |
336 | ||
337 | //_______________________________________________ | |
338 | void AliCheb3DCalc::InitRows(int nr) | |
339 | { | |
340 | // Set max.number of significant rows in the coefs matrix | |
b39f9e02 | 341 | if (fNColsAtRow) {delete[] fNColsAtRow; fNColsAtRow = 0;} |
342 | if (fColAtRowBg) {delete[] fColAtRowBg; fColAtRowBg = 0;} | |
343 | if (fTmpCf0) {delete[] fTmpCf0; fTmpCf0 = 0;} | |
99adacae | 344 | fNRows = nr; |
b39f9e02 | 345 | if (fNRows>0) { |
346 | fNColsAtRow = new UShort_t[fNRows]; | |
347 | fTmpCf0 = new Float_t [fNRows]; | |
348 | fColAtRowBg = new UShort_t[fNRows]; | |
349 | for (int i=fNRows;i--;) fNColsAtRow[i] = fColAtRowBg[i] = 0; | |
350 | } | |
99adacae | 351 | } |
352 | ||
353 | //_______________________________________________ | |
354 | void AliCheb3DCalc::InitElemBound2D(int ne) | |
355 | { | |
356 | // Set max number of significant coefs for given row/column of coefs 3D matrix | |
b39f9e02 | 357 | if (fCoefBound2D0) {delete[] fCoefBound2D0; fCoefBound2D0 = 0;} |
358 | if (fCoefBound2D1) {delete[] fCoefBound2D1; fCoefBound2D1 = 0;} | |
99adacae | 359 | fNElemBound2D = ne; |
b39f9e02 | 360 | if (fNElemBound2D>0) { |
361 | fCoefBound2D0 = new UShort_t[fNElemBound2D]; | |
362 | fCoefBound2D1 = new UShort_t[fNElemBound2D]; | |
363 | for (int i=fNElemBound2D;i--;) fCoefBound2D0[i] = fCoefBound2D1[i] = 0; | |
364 | } | |
99adacae | 365 | } |
366 | ||
367 | //_______________________________________________ | |
368 | void AliCheb3DCalc::InitCoefs(int nc) | |
369 | { | |
370 | // Set total number of significant coefs | |
b39f9e02 | 371 | if (fCoefs) {delete[] fCoefs; fCoefs = 0;} |
99adacae | 372 | fNCoefs = nc; |
b39f9e02 | 373 | if (fNCoefs>0) { |
374 | fCoefs = new Float_t [fNCoefs]; | |
375 | for (int i=fNCoefs;i--;) fCoefs[i] = 0.0; | |
376 | } | |
99adacae | 377 | } |
378 | ||
40389866 | 379 | //__________________________________________________________________________________________ |
380 | Float_t AliCheb3DCalc::ChebEval1Deriv(Float_t x, const Float_t * array, int ncf ) | |
381 | { | |
382 | // evaluate 1D Chebyshev parameterization's derivative. x is the argument mapped to [-1:1] interval | |
1cf34ee8 | 383 | if (--ncf<1) return 0; |
40389866 | 384 | Float_t b0, b1, b2; |
385 | Float_t x2 = x+x; | |
386 | b1 = b2 = 0; | |
387 | float dcf0=0,dcf1,dcf2=0; | |
388 | b0 = dcf1 = 2*ncf*array[ncf]; | |
1cf34ee8 | 389 | if (!(--ncf)) return b0/2; |
40389866 | 390 | // |
391 | for (int i=ncf;i--;) { | |
392 | b2 = b1; | |
393 | b1 = b0; | |
394 | dcf0 = dcf2 + 2*(i+1)*array[i+1]; | |
395 | b0 = dcf0 + x2*b1 -b2; | |
396 | dcf2 = dcf1; | |
397 | dcf1 = dcf0; | |
398 | } | |
399 | // | |
400 | return b0 - x*b1 - dcf0/2; | |
401 | } | |
1cf34ee8 | 402 | |
403 | //__________________________________________________________________________________________ | |
404 | Float_t AliCheb3DCalc::ChebEval1Deriv2(Float_t x, const Float_t * array, int ncf ) | |
405 | { | |
406 | // evaluate 1D Chebyshev parameterization's 2nd derivative. x is the argument mapped to [-1:1] interval | |
407 | if (--ncf<2) return 0; | |
408 | Float_t b0, b1, b2; | |
409 | Float_t x2 = x+x; | |
410 | b1 = b2 = 0; | |
411 | float dcf0=0,dcf1=0,dcf2=0; | |
412 | float ddcf0=0,ddcf1,ddcf2=0; | |
413 | // | |
414 | dcf2 = 2*ncf*array[ncf]; | |
415 | --ncf; | |
416 | ||
417 | dcf1 = 2*ncf*array[ncf]; | |
418 | b0 = ddcf1 = 2*ncf*dcf2; | |
419 | // | |
420 | if (!(--ncf)) return b0/2; | |
421 | // | |
422 | for (int i=ncf;i--;) { | |
423 | b2 = b1; | |
424 | b1 = b0; | |
425 | dcf0 = dcf2 + 2*(i+1)*array[i+1]; | |
426 | ddcf0 = ddcf2 + 2*(i+1)*dcf1; | |
427 | b0 = ddcf0 + x2*b1 -b2; | |
428 | // | |
429 | ddcf2 = ddcf1; | |
430 | ddcf1 = ddcf0; | |
431 | // | |
432 | dcf2 = dcf1; | |
433 | dcf1 = dcf0; | |
434 | // | |
435 | } | |
436 | // | |
437 | return b0 - x*b1 - ddcf0/2; | |
438 | } | |
2572efdf | 439 | |
440 | //__________________________________________________________________________________________ | |
441 | Int_t AliCheb3DCalc::GetMaxColsAtRow() const | |
442 | { | |
443 | int nmax3d = 0; | |
444 | for (int i=fNElemBound2D;i--;) if (fCoefBound2D0[i]>nmax3d) nmax3d = fCoefBound2D0[i]; | |
445 | return nmax3d; | |
446 | } |