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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" |
fa638b6a | 19 | #include "AliLog.h" |
99adacae | 20 | |
21 | ClassImp(AliCheb3DCalc) | |
22 | ||
40389866 | 23 | //__________________________________________________________________________________________ |
24 | AliCheb3DCalc::AliCheb3DCalc() : | |
25 | fNCoefs(0), | |
26 | fNRows(0), | |
27 | fNCols(0), | |
28 | fNElemBound2D(0), | |
29 | fNColsAtRow(0), | |
30 | fColAtRowBg(0), | |
31 | fCoefBound2D0(0), | |
32 | fCoefBound2D1(0), | |
33 | fCoefs(0), | |
34 | fTmpCf1(0), | |
f69ec3f4 | 35 | fTmpCf0(0), |
36 | fPrec(0) | |
5406439e | 37 | { |
38 | // default constructor | |
39 | } | |
99adacae | 40 | |
40389866 | 41 | //__________________________________________________________________________________________ |
42 | AliCheb3DCalc::AliCheb3DCalc(const AliCheb3DCalc& src) : | |
43 | TNamed(src), | |
44 | fNCoefs(src.fNCoefs), | |
45 | fNRows(src.fNRows), | |
46 | fNCols(src.fNCols), | |
47 | fNElemBound2D(src.fNElemBound2D), | |
48 | fNColsAtRow(0), | |
49 | fColAtRowBg(0), | |
50 | fCoefBound2D0(0), | |
51 | fCoefBound2D1(0), | |
52 | fCoefs(0), | |
53 | fTmpCf1(0), | |
f69ec3f4 | 54 | fTmpCf0(0), |
55 | fPrec(src.fPrec) | |
99adacae | 56 | { |
5406439e | 57 | // copy constructor |
58 | // | |
40389866 | 59 | if (src.fNColsAtRow) { |
1d18ebe0 | 60 | fNColsAtRow = new UShort_t[fNRows]; |
40389866 | 61 | for (int i=fNRows;i--;) fNColsAtRow[i] = src.fNColsAtRow[i]; |
62 | } | |
63 | if (src.fColAtRowBg) { | |
1d18ebe0 | 64 | fColAtRowBg = new UShort_t[fNRows]; |
40389866 | 65 | for (int i=fNRows;i--;) fColAtRowBg[i] = src.fColAtRowBg[i]; |
66 | } | |
67 | if (src.fCoefBound2D0) { | |
1d18ebe0 | 68 | fCoefBound2D0 = new UShort_t[fNElemBound2D]; |
40389866 | 69 | for (int i=fNElemBound2D;i--;) fCoefBound2D0[i] = src.fCoefBound2D0[i]; |
70 | } | |
71 | if (src.fCoefBound2D1) { | |
1d18ebe0 | 72 | fCoefBound2D1 = new UShort_t[fNElemBound2D]; |
40389866 | 73 | for (int i=fNElemBound2D;i--;) fCoefBound2D1[i] = src.fCoefBound2D1[i]; |
74 | } | |
75 | if (src.fCoefs) { | |
76 | fCoefs = new Float_t[fNCoefs]; | |
77 | for (int i=fNCoefs;i--;) fCoefs[i] = src.fCoefs[i]; | |
78 | } | |
79 | if (src.fTmpCf1) fTmpCf1 = new Float_t[fNCols]; | |
80 | if (src.fTmpCf0) fTmpCf0 = new Float_t[fNRows]; | |
99adacae | 81 | } |
82 | ||
40389866 | 83 | //__________________________________________________________________________________________ |
84 | AliCheb3DCalc::AliCheb3DCalc(FILE* stream) : | |
85 | fNCoefs(0), | |
86 | fNRows(0), | |
87 | fNCols(0), | |
88 | fNElemBound2D(0), | |
89 | fNColsAtRow(0), | |
90 | fColAtRowBg(0), | |
91 | fCoefBound2D0(0), | |
92 | fCoefBound2D1(0), | |
93 | fCoefs(0), | |
94 | fTmpCf1(0), | |
f69ec3f4 | 95 | fTmpCf0(0), |
96 | fPrec(0) | |
99adacae | 97 | { |
5406439e | 98 | // constructor from coeffs. streem |
40389866 | 99 | LoadData(stream); |
99adacae | 100 | } |
101 | ||
40389866 | 102 | //__________________________________________________________________________________________ |
103 | AliCheb3DCalc& AliCheb3DCalc::operator=(const AliCheb3DCalc& rhs) | |
99adacae | 104 | { |
5406439e | 105 | // assignment operator |
40389866 | 106 | if (this != &rhs) { |
107 | Clear(); | |
108 | SetName(rhs.GetName()); | |
109 | SetTitle(rhs.GetTitle()); | |
110 | fNCoefs = rhs.fNCoefs; | |
111 | fNRows = rhs.fNRows; | |
112 | fNCols = rhs.fNCols; | |
f69ec3f4 | 113 | fPrec = rhs.fPrec; |
40389866 | 114 | if (rhs.fNColsAtRow) { |
1d18ebe0 | 115 | fNColsAtRow = new UShort_t[fNRows]; |
40389866 | 116 | for (int i=fNRows;i--;) fNColsAtRow[i] = rhs.fNColsAtRow[i]; |
99adacae | 117 | } |
40389866 | 118 | if (rhs.fColAtRowBg) { |
1d18ebe0 | 119 | fColAtRowBg = new UShort_t[fNRows]; |
40389866 | 120 | for (int i=fNRows;i--;) fColAtRowBg[i] = rhs.fColAtRowBg[i]; |
99adacae | 121 | } |
40389866 | 122 | if (rhs.fCoefBound2D0) { |
1d18ebe0 | 123 | fCoefBound2D0 = new UShort_t[fNElemBound2D]; |
40389866 | 124 | for (int i=fNElemBound2D;i--;) fCoefBound2D0[i] = rhs.fCoefBound2D0[i]; |
99adacae | 125 | } |
40389866 | 126 | if (rhs.fCoefBound2D1) { |
1d18ebe0 | 127 | fCoefBound2D1 = new UShort_t[fNElemBound2D]; |
40389866 | 128 | for (int i=fNElemBound2D;i--;) fCoefBound2D1[i] = rhs.fCoefBound2D1[i]; |
99adacae | 129 | } |
40389866 | 130 | if (rhs.fCoefs) { |
131 | fCoefs = new Float_t[fNCoefs]; | |
132 | for (int i=fNCoefs;i--;) fCoefs[i] = rhs.fCoefs[i]; | |
99adacae | 133 | } |
40389866 | 134 | if (rhs.fTmpCf1) fTmpCf1 = new Float_t[fNCols]; |
135 | if (rhs.fTmpCf0) fTmpCf0 = new Float_t[fNRows]; | |
136 | } | |
137 | return *this; | |
99adacae | 138 | } |
139 | ||
140 | //__________________________________________________________________________________________ | |
5406439e | 141 | void AliCheb3DCalc::Clear(const Option_t*) |
99adacae | 142 | { |
143 | // delete all dynamycally allocated structures | |
144 | if (fTmpCf1) { delete[] fTmpCf1; fTmpCf1 = 0;} | |
145 | if (fTmpCf0) { delete[] fTmpCf0; fTmpCf0 = 0;} | |
146 | if (fCoefs) { delete[] fCoefs; fCoefs = 0;} | |
147 | if (fCoefBound2D0) { delete[] fCoefBound2D0; fCoefBound2D0 = 0; } | |
148 | if (fCoefBound2D1) { delete[] fCoefBound2D1; fCoefBound2D1 = 0; } | |
149 | if (fNColsAtRow) { delete[] fNColsAtRow; fNColsAtRow = 0; } | |
150 | if (fColAtRowBg) { delete[] fColAtRowBg; fColAtRowBg = 0; } | |
151 | // | |
152 | } | |
153 | ||
99adacae | 154 | //__________________________________________________________________________________________ |
5406439e | 155 | void AliCheb3DCalc::Print(const Option_t* ) const |
99adacae | 156 | { |
5406439e | 157 | // print info |
f69ec3f4 | 158 | printf("Chebyshev parameterization data %s for 3D->1 function. Prec:%e\n",GetName(),fPrec); |
99adacae | 159 | int nmax3d = 0; |
160 | for (int i=fNElemBound2D;i--;) if (fCoefBound2D0[i]>nmax3d) nmax3d = fCoefBound2D0[i]; | |
161 | printf("%d coefficients in %dx%dx%d matrix\n",fNCoefs,fNRows,fNCols,nmax3d); | |
162 | // | |
163 | } | |
164 | ||
40389866 | 165 | //__________________________________________________________________________________________ |
5406439e | 166 | Float_t AliCheb3DCalc::EvalDeriv(int dim, const Float_t *par) const |
40389866 | 167 | { |
168 | // evaluate Chebyshev parameterization derivative in given dimension for 3D function. | |
169 | // VERY IMPORTANT: par must contain the function arguments ALREADY MAPPED to [-1:1] interval | |
40389866 | 170 | // |
171 | int ncfRC; | |
172 | for (int id0=fNRows;id0--;) { | |
173 | int nCLoc = fNColsAtRow[id0]; // number of significant coefs on this row | |
1cf34ee8 | 174 | if (!nCLoc) {fTmpCf0[id0]=0; continue;} |
175 | // | |
5406439e | 176 | int col0 = fColAtRowBg[id0]; // beginning of local column in the 2D boundary matrix |
40389866 | 177 | for (int id1=nCLoc;id1--;) { |
5406439e | 178 | int id = id1+col0; |
1cf34ee8 | 179 | if (!(ncfRC=fCoefBound2D0[id])) { fTmpCf1[id1]=0; continue;} |
ff66b122 | 180 | if (dim==2) fTmpCf1[id1] = ChebEval1Deriv(par[2],fCoefs + fCoefBound2D1[id], ncfRC); |
181 | else fTmpCf1[id1] = ChebEval1D(par[2],fCoefs + fCoefBound2D1[id], ncfRC); | |
40389866 | 182 | } |
ff66b122 | 183 | if (dim==1) fTmpCf0[id0] = ChebEval1Deriv(par[1],fTmpCf1,nCLoc); |
184 | else fTmpCf0[id0] = ChebEval1D(par[1],fTmpCf1,nCLoc); | |
40389866 | 185 | } |
ff66b122 | 186 | return (dim==0) ? ChebEval1Deriv(par[0],fTmpCf0,fNRows) : ChebEval1D(par[0],fTmpCf0,fNRows); |
40389866 | 187 | // |
188 | } | |
189 | ||
1cf34ee8 | 190 | //__________________________________________________________________________________________ |
5406439e | 191 | Float_t AliCheb3DCalc::EvalDeriv2(int dim1,int dim2, const Float_t *par) const |
1cf34ee8 | 192 | { |
193 | // evaluate Chebyshev parameterization 2n derivative in given dimensions for 3D function. | |
194 | // VERY IMPORTANT: par must contain the function arguments ALREADY MAPPED to [-1:1] interval | |
1cf34ee8 | 195 | // |
196 | Bool_t same = dim1==dim2; | |
197 | int ncfRC; | |
198 | for (int id0=fNRows;id0--;) { | |
199 | int nCLoc = fNColsAtRow[id0]; // number of significant coefs on this row | |
200 | if (!nCLoc) {fTmpCf0[id0]=0; continue;} | |
201 | // | |
5406439e | 202 | int col0 = fColAtRowBg[id0]; // beginning of local column in the 2D boundary matrix |
1cf34ee8 | 203 | for (int id1=nCLoc;id1--;) { |
5406439e | 204 | int id = id1+col0; |
1cf34ee8 | 205 | if (!(ncfRC=fCoefBound2D0[id])) { fTmpCf1[id1]=0; continue;} |
ff66b122 | 206 | if (dim1==2||dim2==2) fTmpCf1[id1] = same ? ChebEval1Deriv2(par[2],fCoefs + fCoefBound2D1[id], ncfRC) |
207 | : ChebEval1Deriv(par[2],fCoefs + fCoefBound2D1[id], ncfRC); | |
208 | else fTmpCf1[id1] = ChebEval1D(par[2],fCoefs + fCoefBound2D1[id], ncfRC); | |
1cf34ee8 | 209 | } |
ff66b122 | 210 | if (dim1==1||dim2==1) fTmpCf0[id0] = same ? ChebEval1Deriv2(par[1],fTmpCf1,nCLoc):ChebEval1Deriv(par[1],fTmpCf1,nCLoc); |
211 | else fTmpCf0[id0] = ChebEval1D(par[1],fTmpCf1,nCLoc); | |
1cf34ee8 | 212 | } |
ff66b122 | 213 | return (dim1==0||dim2==0) ? (same ? ChebEval1Deriv2(par[0],fTmpCf0,fNRows):ChebEval1Deriv(par[0],fTmpCf0,fNRows)) : |
214 | ChebEval1D(par[0],fTmpCf0,fNRows); | |
1cf34ee8 | 215 | // |
216 | } | |
217 | ||
99adacae | 218 | //_______________________________________________ |
219 | #ifdef _INC_CREATION_ALICHEB3D_ | |
220 | void AliCheb3DCalc::SaveData(const char* outfile,Bool_t append) const | |
221 | { | |
222 | // writes coefficients data to output text file, optionallt appending on the end of existing file | |
223 | TString strf = outfile; | |
224 | gSystem->ExpandPathName(strf); | |
225 | FILE* stream = fopen(strf,append ? "a":"w"); | |
226 | SaveData(stream); | |
227 | fclose(stream); | |
228 | // | |
229 | } | |
230 | #endif | |
231 | ||
232 | //_______________________________________________ | |
233 | #ifdef _INC_CREATION_ALICHEB3D_ | |
234 | void AliCheb3DCalc::SaveData(FILE* stream) const | |
235 | { | |
236 | // writes coefficients data to existing output stream | |
237 | // Note: fNCols, fNElemBound2D and fColAtRowBg is not stored, will be computed on fly during the loading of this file | |
238 | fprintf(stream,"#\nSTART %s\n",GetName()); | |
239 | fprintf(stream,"# Number of rows\n%d\n",fNRows); | |
240 | // | |
241 | fprintf(stream,"# Number of columns per row\n"); | |
242 | for (int i=0;i<fNRows;i++) fprintf(stream,"%d\n",fNColsAtRow[i]); | |
243 | // | |
244 | fprintf(stream,"# Number of Coefs in each significant block of third dimension\n"); | |
245 | for (int i=0;i<fNElemBound2D;i++) fprintf(stream,"%d\n",fCoefBound2D0[i]); | |
246 | // | |
247 | fprintf(stream,"# Coefficients\n"); | |
248 | for (int i=0;i<fNCoefs;i++) fprintf(stream,"%+.8e\n",fCoefs[i]); | |
f69ec3f4 | 249 | // |
250 | fprintf(stream,"# Precision\n"); | |
251 | fprintf(stream,"%+.8e\n",fPrec); | |
252 | // | |
99adacae | 253 | fprintf(stream,"END %s\n",GetName()); |
254 | // | |
255 | } | |
256 | #endif | |
257 | ||
258 | //_______________________________________________ | |
259 | void AliCheb3DCalc::LoadData(FILE* stream) | |
260 | { | |
261 | // Load coefs. from the stream | |
fa638b6a | 262 | if (!stream) AliFatal("No stream provided"); |
99adacae | 263 | TString buffs; |
264 | Clear(); | |
265 | ReadLine(buffs,stream); | |
fa638b6a | 266 | if (!buffs.BeginsWith("START")) AliFatalF("Expected: \"START <fit_name>\", found \"%s\"",buffs.Data()); |
99adacae | 267 | if (buffs.First(' ')>0) SetName(buffs.Data()+buffs.First(' ')+1); |
268 | // | |
269 | ReadLine(buffs,stream); // NRows | |
270 | fNRows = buffs.Atoi(); | |
fa638b6a | 271 | if (fNRows<0 && !buffs.IsDigit()) AliFatalF("Expected: '<number_of_rows>', found \"%s\"",buffs.Data()); |
99adacae | 272 | // |
273 | fNCols = 0; | |
274 | fNElemBound2D = 0; | |
275 | InitRows(fNRows); | |
276 | // | |
277 | for (int id0=0;id0<fNRows;id0++) { | |
278 | ReadLine(buffs,stream); // n.cols at this row | |
279 | fNColsAtRow[id0] = buffs.Atoi(); | |
280 | fColAtRowBg[id0] = fNElemBound2D; // begining of this row in 2D boundary surface | |
281 | fNElemBound2D += fNColsAtRow[id0]; | |
282 | if (fNCols<fNColsAtRow[id0]) fNCols = fNColsAtRow[id0]; | |
283 | } | |
284 | InitCols(fNCols); | |
285 | // | |
286 | fNCoefs = 0; | |
287 | InitElemBound2D(fNElemBound2D); | |
288 | // | |
289 | for (int i=0;i<fNElemBound2D;i++) { | |
290 | ReadLine(buffs,stream); // n.coeffs at 3-d dimension for the given column/row | |
291 | fCoefBound2D0[i] = buffs.Atoi(); | |
292 | fCoefBound2D1[i] = fNCoefs; | |
293 | fNCoefs += fCoefBound2D0[i]; | |
294 | } | |
295 | // | |
99adacae | 296 | InitCoefs(fNCoefs); |
297 | for (int i=0;i<fNCoefs;i++) { | |
298 | ReadLine(buffs,stream); | |
299 | fCoefs[i] = buffs.Atof(); | |
300 | } | |
f69ec3f4 | 301 | // |
302 | // read precision | |
303 | ReadLine(buffs,stream); | |
304 | fPrec = buffs.Atof(); | |
305 | // | |
99adacae | 306 | // check end_of_data record |
307 | ReadLine(buffs,stream); | |
fa638b6a | 308 | if (!buffs.BeginsWith("END") || !buffs.Contains(GetName())) AliFatalF("Expected \"END %s\", found \"%s\"",GetName(),buffs.Data()); |
99adacae | 309 | // |
310 | } | |
311 | ||
312 | //_______________________________________________ | |
313 | void AliCheb3DCalc::ReadLine(TString& str,FILE* stream) | |
314 | { | |
315 | // read single line from the stream, skipping empty and commented lines. EOF is not expected | |
316 | while (str.Gets(stream)) { | |
317 | str = str.Strip(TString::kBoth,' '); | |
318 | if (str.IsNull()||str.BeginsWith("#")) continue; | |
319 | return; | |
320 | } | |
fa638b6a | 321 | AliFatalGeneral("ReadLine","Failed to read from stream"); // normally, should not reach here |
99adacae | 322 | } |
323 | ||
324 | //_______________________________________________ | |
325 | void AliCheb3DCalc::InitCols(int nc) | |
326 | { | |
327 | // Set max.number of significant columns in the coefs matrix | |
328 | fNCols = nc; | |
b39f9e02 | 329 | if (fTmpCf1) {delete[] fTmpCf1; fTmpCf1 = 0;} |
330 | if (fNCols>0) fTmpCf1 = new Float_t [fNCols]; | |
99adacae | 331 | } |
332 | ||
333 | //_______________________________________________ | |
334 | void AliCheb3DCalc::InitRows(int nr) | |
335 | { | |
336 | // Set max.number of significant rows in the coefs matrix | |
b39f9e02 | 337 | if (fNColsAtRow) {delete[] fNColsAtRow; fNColsAtRow = 0;} |
338 | if (fColAtRowBg) {delete[] fColAtRowBg; fColAtRowBg = 0;} | |
339 | if (fTmpCf0) {delete[] fTmpCf0; fTmpCf0 = 0;} | |
99adacae | 340 | fNRows = nr; |
b39f9e02 | 341 | if (fNRows>0) { |
342 | fNColsAtRow = new UShort_t[fNRows]; | |
343 | fTmpCf0 = new Float_t [fNRows]; | |
344 | fColAtRowBg = new UShort_t[fNRows]; | |
345 | for (int i=fNRows;i--;) fNColsAtRow[i] = fColAtRowBg[i] = 0; | |
346 | } | |
99adacae | 347 | } |
348 | ||
349 | //_______________________________________________ | |
350 | void AliCheb3DCalc::InitElemBound2D(int ne) | |
351 | { | |
352 | // Set max number of significant coefs for given row/column of coefs 3D matrix | |
b39f9e02 | 353 | if (fCoefBound2D0) {delete[] fCoefBound2D0; fCoefBound2D0 = 0;} |
354 | if (fCoefBound2D1) {delete[] fCoefBound2D1; fCoefBound2D1 = 0;} | |
99adacae | 355 | fNElemBound2D = ne; |
b39f9e02 | 356 | if (fNElemBound2D>0) { |
357 | fCoefBound2D0 = new UShort_t[fNElemBound2D]; | |
358 | fCoefBound2D1 = new UShort_t[fNElemBound2D]; | |
359 | for (int i=fNElemBound2D;i--;) fCoefBound2D0[i] = fCoefBound2D1[i] = 0; | |
360 | } | |
99adacae | 361 | } |
362 | ||
363 | //_______________________________________________ | |
364 | void AliCheb3DCalc::InitCoefs(int nc) | |
365 | { | |
366 | // Set total number of significant coefs | |
b39f9e02 | 367 | if (fCoefs) {delete[] fCoefs; fCoefs = 0;} |
99adacae | 368 | fNCoefs = nc; |
b39f9e02 | 369 | if (fNCoefs>0) { |
370 | fCoefs = new Float_t [fNCoefs]; | |
371 | for (int i=fNCoefs;i--;) fCoefs[i] = 0.0; | |
372 | } | |
99adacae | 373 | } |
374 | ||
40389866 | 375 | //__________________________________________________________________________________________ |
376 | Float_t AliCheb3DCalc::ChebEval1Deriv(Float_t x, const Float_t * array, int ncf ) | |
377 | { | |
378 | // evaluate 1D Chebyshev parameterization's derivative. x is the argument mapped to [-1:1] interval | |
1cf34ee8 | 379 | if (--ncf<1) return 0; |
40389866 | 380 | Float_t b0, b1, b2; |
381 | Float_t x2 = x+x; | |
382 | b1 = b2 = 0; | |
383 | float dcf0=0,dcf1,dcf2=0; | |
384 | b0 = dcf1 = 2*ncf*array[ncf]; | |
1cf34ee8 | 385 | if (!(--ncf)) return b0/2; |
40389866 | 386 | // |
387 | for (int i=ncf;i--;) { | |
388 | b2 = b1; | |
389 | b1 = b0; | |
390 | dcf0 = dcf2 + 2*(i+1)*array[i+1]; | |
391 | b0 = dcf0 + x2*b1 -b2; | |
392 | dcf2 = dcf1; | |
393 | dcf1 = dcf0; | |
394 | } | |
395 | // | |
396 | return b0 - x*b1 - dcf0/2; | |
397 | } | |
1cf34ee8 | 398 | |
399 | //__________________________________________________________________________________________ | |
400 | Float_t AliCheb3DCalc::ChebEval1Deriv2(Float_t x, const Float_t * array, int ncf ) | |
401 | { | |
402 | // evaluate 1D Chebyshev parameterization's 2nd derivative. x is the argument mapped to [-1:1] interval | |
403 | if (--ncf<2) return 0; | |
404 | Float_t b0, b1, b2; | |
405 | Float_t x2 = x+x; | |
406 | b1 = b2 = 0; | |
407 | float dcf0=0,dcf1=0,dcf2=0; | |
408 | float ddcf0=0,ddcf1,ddcf2=0; | |
409 | // | |
410 | dcf2 = 2*ncf*array[ncf]; | |
411 | --ncf; | |
412 | ||
413 | dcf1 = 2*ncf*array[ncf]; | |
414 | b0 = ddcf1 = 2*ncf*dcf2; | |
415 | // | |
416 | if (!(--ncf)) return b0/2; | |
417 | // | |
418 | for (int i=ncf;i--;) { | |
419 | b2 = b1; | |
420 | b1 = b0; | |
421 | dcf0 = dcf2 + 2*(i+1)*array[i+1]; | |
422 | ddcf0 = ddcf2 + 2*(i+1)*dcf1; | |
423 | b0 = ddcf0 + x2*b1 -b2; | |
424 | // | |
425 | ddcf2 = ddcf1; | |
426 | ddcf1 = ddcf0; | |
427 | // | |
428 | dcf2 = dcf1; | |
429 | dcf1 = dcf0; | |
430 | // | |
431 | } | |
432 | // | |
433 | return b0 - x*b1 - ddcf0/2; | |
434 | } | |
2572efdf | 435 | |
436 | //__________________________________________________________________________________________ | |
437 | Int_t AliCheb3DCalc::GetMaxColsAtRow() const | |
438 | { | |
439 | int nmax3d = 0; | |
440 | for (int i=fNElemBound2D;i--;) if (fCoefBound2D0[i]>nmax3d) nmax3d = fCoefBound2D0[i]; | |
441 | return nmax3d; | |
442 | } |