-// Author: ruben.shahoyan@cern.ch 09/09/2006
-
-////////////////////////////////////////////////////////////////////////////////
-// //
-// AliCheb3D produces the interpolation of the user 3D->NDimOut arbitrary //
-// function supplied in "void (*fcn)(float* inp,float* out)" format //
-// either in a separate macro file or as a function pointer. //
-// Only coefficients needed to guarantee the requested precision are kept. //
-// //
-// The user-callable methods are: //
-// To create the interpolation use: //
-// AliCheb3D(const char* funName, // name of the file with user function //
-// or //
-// AliCheb3D(void (*ptr)(float*,float*),// pointer on the user function //
-// Int_t DimOut, // dimensionality of the function's output //
-// Float_t *bmin, // lower 3D bounds of interpolation domain //
-// Float_t *bmax, // upper 3D bounds of interpolation domain //
-// Int_t *npoints, // number of points in each of 3 input //
-// // dimension, defining the interpolation grid //
-// Float_t prec=1E-6); // requested max.absolute difference between //
-// // the interpolation and any point on grid //
-// //
-// To test obtained parameterization use the method //
-// TH1* TestRMS(int idim,int npoints = 1000,TH1* histo=0); //
-// it will compare the user output of the user function and interpolation //
-// for idim-th output dimension and fill the difference in the supplied //
-// histogram. If no histogram is supplied, it will be created. //
-// //
-// To save the interpolation data: //
-// SaveData(const char* filename, Bool_t append ) //
-// write text file with data. If append is kTRUE and the output file already //
-// exists, data will be added in the end of the file. //
-// Alternatively, SaveData(FILE* stream) will write the data to //
-// already existing stream. //
-// //
-// To read back already stored interpolation use either the constructor //
-// AliCheb3D(const char* inpFile); //
-// or the default constructor AliCheb3D() followed by //
-// AliCheb3D::LoadData(const char* inpFile); //
-// //
-// To compute the interpolation use Eval(float* par,float *res) method, with //
-// par being 3D vector of arguments (inside the validity region) and res is //
-// the array of DimOut elements for the output. //
-// //
-// If only one component (say, idim-th) of the output is needed, use faster //
-// Float_t Eval(Float_t *par,int idim) method. //
-// //
-// void Print(option="") will print the name, the ranges of validity and //
-// the absolute precision of the parameterization. Option "l" will also print //
-// the information about the number of coefficients for each output //
-// dimension. //
-// //
-// NOTE: during the evaluation no check is done for parameter vector being //
-// outside the interpolation region. If there is such a risk, use //
-// Bool_t IsInside(float *par) method. Chebyshev parameterization is not //
-// good for extrapolation! //
-// //
-// For the properties of Chebyshev parameterization see: //
-// H.Wind, CERN EP Internal Report, 81-12/Rev. //
-// //
-////////////////////////////////////////////////////////////////////////////////
+/**************************************************************************
+ * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
+ * *
+ * Author: The ALICE Off-line Project. *
+ * Contributors are mentioned in the code where appropriate. *
+ * *
+ * Permission to use, copy, modify and distribute this software and its *
+ * documentation strictly for non-commercial purposes is hereby granted *
+ * without fee, provided that the above copyright notice appears in all *
+ * copies and that both the copyright notice and this permission notice *
+ * appear in the supporting documentation. The authors make no claims *
+ * about the suitability of this software for any purpose. It is *
+ * provided "as is" without express or implied warranty. *
+ **************************************************************************/
#include <TString.h>
#include <TSystem.h>
#include <TROOT.h>
#include <TRandom.h>
+#include <stdio.h>
+#include <TMethodCall.h>
+#include <TMath.h>
+#include <TH1.h>
#include "AliCheb3D.h"
-
-
+#include "AliCheb3DCalc.h"
ClassImp(AliCheb3D)
fUsrFunName(""),
fUsrMacro(0)
{
- for (int i=3;i--;) fBMin[i] = fBMax[i] = fBScale[i] = fBOffset[i] = 0;
+// Default constructor
+ for (int i=3;i--;) {
+ fBMin[i] = fBMax[i] = fBScale[i] = fBOffset[i] = fArgsTmp[i] = 0;
+ fNPoints[i] = 0;
+ fGridOffs[i] = 0;
+ }
}
//__________________________________________________________________________________________
fBScale[i] = src.fBScale[i];
fBOffset[i] = src.fBOffset[i];
fNPoints[i] = src.fNPoints[i];
+ fGridOffs[i] = src.fGridOffs[i];
+ fArgsTmp[i] = 0;
}
for (int i=0;i<fDimOut;i++) {
AliCheb3DCalc* cbc = src.GetChebCalc(i);
fUsrMacro(0)
{
// read coefs from text file
- for (int i=3;i--;) fBMin[i] = fBMax[i] = fBScale[i] = fBOffset[i] = 0;
+ for (int i=3;i--;) {
+ fBMin[i] = fBMax[i] = fBScale[i] = fBOffset[i] = 0;
+ fNPoints[i] = 0;
+ fGridOffs[i] = 0;
+ fArgsTmp[i] = 0;
+ }
LoadData(inpFile);
}
fUsrMacro(0)
{
// read coefs from stream
- for (int i=3;i--;) fBMin[i] = fBMax[i] = fBScale[i] = fBOffset[i] = 0;
+ for (int i=3;i--;) {
+ fBMin[i] = fBMax[i] = fBScale[i] = fBOffset[i] = 0;
+ fNPoints[i] = 0;
+ fGridOffs[i] = 0;
+ fArgsTmp[i] = 0;
+ }
LoadData(stream);
}
//__________________________________________________________________________________________
#ifdef _INC_CREATION_ALICHEB3D_
-AliCheb3D::AliCheb3D(const char* funName, int DimOut, Float_t *bmin,Float_t *bmax, Int_t *npoints, Float_t prec) :
+AliCheb3D::AliCheb3D(const char* funName, int DimOut, const Float_t *bmin, const Float_t *bmax, Int_t *npoints, Float_t prec) :
TNamed(funName,funName),
fDimOut(0),
fPrec(TMath::Max(1.E-12f,prec)),
// prec : max allowed absolute difference between the user function and computed parameterization on the requested grid
//
if (DimOut<1) {Error("AliCheb3D","Requested output dimension is %d\nStop\n",fDimOut); exit(1);}
+ for (int i=3;i--;) {
+ fBMin[i] = fBMax[i] = fBScale[i] = fBOffset[i] = 0;
+ fNPoints[i] = 0;
+ fGridOffs[i] = 0.;
+ fArgsTmp[i] = 0;
+ }
SetDimOut(DimOut);
PrepareBoundaries(bmin,bmax);
DefineGrid(npoints);
// prec : max allowed absolute difference between the user function and computed parameterization on the requested grid
//
if (DimOut<1) {Error("AliCheb3D","Requested output dimension is %d\nStop\n",fDimOut); exit(1);}
+ if (DimOut<1) {Error("AliCheb3D","Requested output dimension is %d\nStop\n",fDimOut); exit(1);}
+ for (int i=3;i--;) {
+ fBMin[i] = fBMax[i] = fBScale[i] = fBOffset[i] = 0;
+ fNPoints[i] = 0;
+ fGridOffs[i] = 0.;
+ fArgsTmp[i] = 0;
+ }
SetDimOut(DimOut);
PrepareBoundaries(bmin,bmax);
DefineGrid(npoints);
// prec : max allowed absolute difference between the user function and computed parameterization on the requested grid
//
if (DimOut<1) {Error("AliCheb3D","Requested output dimension is %d\nStop\n",fDimOut); exit(1);}
+ if (DimOut<1) {Error("AliCheb3D","Requested output dimension is %d\nStop\n",fDimOut); exit(1);}
+ for (int i=3;i--;) {
+ fBMin[i] = fBMax[i] = fBScale[i] = fBOffset[i] = 0;
+ fNPoints[i] = 0;
+ fGridOffs[i] = 0.;
+ fArgsTmp[i] = 0;
+ }
SetDimOut(DimOut);
PrepareBoundaries(bmin,bmax);
SetUsrFunction(ptr);
//__________________________________________________________________________________________
#ifdef _INC_CREATION_ALICHEB3D_
-AliCheb3D::AliCheb3D(void (*ptr)(float*,float*), int DimOut, Float_t *bmin,Float_t *bmax, Float_t prec) :
+AliCheb3D::AliCheb3D(void (*ptr)(float*,float*), int DimOut, Float_t *bmin,Float_t *bmax, Float_t prec, Bool_t run) :
fDimOut(0),
fPrec(TMath::Max(1.E-12f,prec)),
fChebCalc(1),
// prec : max allowed absolute difference between the user function and computed parameterization on the requested grid
//
if (DimOut!=3) {Error("AliCheb3D","This constructor works only for 3D fits, %dD fit was requested\n",fDimOut); exit(1);}
+ if (DimOut<1) {Error("AliCheb3D","Requested output dimension is %d\nStop\n",fDimOut); exit(1);}
+ for (int i=3;i--;) {
+ fBMin[i] = fBMax[i] = fBScale[i] = fBOffset[i] = 0;
+ fNPoints[i] = 0;
+ fGridOffs[i] = 0.;
+ fArgsTmp[i] = 0;
+ }
SetDimOut(DimOut);
PrepareBoundaries(bmin,bmax);
SetUsrFunction(ptr);
//
- int gridNC[3][3];
- EstimateNPoints(prec,gridNC);
- DefineGrid(gridNC[0]);
- ChebFit(0);
- DefineGrid(gridNC[1]);
- ChebFit(1);
- DefineGrid(gridNC[2]);
- ChebFit(2);
+ if (run) {
+ int gridNC[3][3];
+ EstimateNPoints(prec,gridNC);
+ DefineGrid(gridNC[0]);
+ ChebFit(0);
+ DefineGrid(gridNC[1]);
+ ChebFit(1);
+ DefineGrid(gridNC[2]);
+ ChebFit(2);
+ }
//
}
#endif
//__________________________________________________________________________________________
AliCheb3D& AliCheb3D::operator=(const AliCheb3D& rhs)
{
+ // assignment operator
+ //
if (this != &rhs) {
Clear();
fDimOut = rhs.fDimOut;
}
//__________________________________________________________________________________________
-void AliCheb3D::Clear(Option_t*)
+void AliCheb3D::Clear(const Option_t*)
{
+ // clear all dynamic structures
+ //
if (fResTmp) { delete[] fResTmp; fResTmp = 0; }
if (fGrid) { delete[] fGrid; fGrid = 0; }
if (fUsrMacro) { delete fUsrMacro; fUsrMacro = 0;}
+ fChebCalc.SetOwner(kTRUE);
fChebCalc.Delete();
//
}
//__________________________________________________________________________________________
-void AliCheb3D::Print(Option_t* opt) const
+void AliCheb3D::Print(const Option_t* opt) const
{
+ // print info
+ //
printf("%s: Chebyshev parameterization for 3D->%dD function. Precision: %e\n",GetName(),fDimOut,fPrec);
printf("Region of validity: [%+.5e:%+.5e] [%+.5e:%+.5e] [%+.5e:%+.5e]\n",fBMin[0],fBMax[0],fBMin[1],fBMax[1],fBMin[2],fBMax[2]);
TString opts = opt; opts.ToLower();
}
//__________________________________________________________________________________________
-void AliCheb3D::PrepareBoundaries(Float_t *bmin,Float_t *bmax)
+void AliCheb3D::PrepareBoundaries(const Float_t *bmin, const Float_t *bmax)
{
// Set and check boundaries defined by user, prepare coefficients for their conversion to [-1:1] interval
//
#ifdef _INC_CREATION_ALICHEB3D_
void AliCheb3D::SetUsrFunction(void (*ptr)(float*,float*))
{
+ // assign user training function
+ //
if (fUsrMacro) delete fUsrMacro;
fUsrMacro = 0;
fUsrFunName = "";
//__________________________________________________________________________________________
#ifdef _INC_CREATION_ALICHEB3D_
-void AliCheb3D::EvalUsrFunction(Float_t *x, Float_t *res) {
+void AliCheb3D::EvalUsrFunction(const Float_t *x, Float_t *res)
+{
+ // evaluate user function value
+ //
for (int i=3;i--;) fArgsTmp[i] = x[i];
if (gUsrFunAliCheb3D) gUsrFunAliCheb3D(fArgsTmp,fResTmp);
else fUsrMacro->Execute();
//__________________________________________________________________________________________
#ifdef _INC_CREATION_ALICHEB3D_
-Int_t AliCheb3D::CalcChebCoefs(Float_t *funval,int np, Float_t *outCoefs, Float_t prec)
+Int_t AliCheb3D::CalcChebCoefs(const Float_t *funval,int np, Float_t *outCoefs, Float_t prec)
{
// Calculate Chebyshev coeffs using precomputed function values at np roots.
// If prec>0, estimate the highest coeff number providing the needed precision
Float_t *tmpCoef2D = new Float_t [ fNPoints[0]*fNPoints[1] ];
Float_t *tmpCoef1D = new Float_t [ maxDim ];
//
- Float_t RTiny = fPrec/Float_t(maxDim); // neglect coefficient below this threshold
+ Float_t rTiny = 0.1*fPrec/Float_t(maxDim); // neglect coefficient below this threshold
//
// 1D Cheb.fit for 0-th dimension at current steps of remaining dimensions
int ncmax = 0;
}
//
// now find 2D surface which separates significant coefficients of 3D matrix from nonsignificant ones (up to fPrec)
- int *tmpCoefSurf = new Int_t[ fNPoints[0]*fNPoints[1] ];
+ UShort_t *tmpCoefSurf = new UShort_t[ fNPoints[0]*fNPoints[1] ];
for (int id0=fNPoints[0];id0--;) for (int id1=fNPoints[1];id1--;) tmpCoefSurf[id1+id0*fNPoints[1]]=0;
Double_t resid = 0;
for (int id0=fNPoints[0];id0--;) {
for (int id2=fNPoints[2];id2--;) {
int id = id2 + fNPoints[2]*(id1+id0*fNPoints[1]);
Float_t cfa = TMath::Abs(tmpCoef3D[id]);
- if (cfa < RTiny) {tmpCoef3D[id] = 0; continue;} // neglect coefs below the threshold
+ if (cfa < rTiny) {tmpCoef3D[id] = 0; continue;} // neglect coefs below the threshold
resid += cfa;
if (resid<fPrec) continue; // this coeff is negligible
// otherwise go back 1 step
}
*/
// see if there are rows to reject, find max.significant column at each row
- int NRows = fNPoints[0];
- int *tmpCols = new int[NRows];
+ int nRows = fNPoints[0];
+ UShort_t *tmpCols = new UShort_t[nRows];
for (int id0=fNPoints[0];id0--;) {
int id1 = fNPoints[1];
while (id1>0 && tmpCoefSurf[(id1-1)+id0*fNPoints[1]]==0) id1--;
tmpCols[id0] = id1;
}
// find max significant row
- for (int id0=NRows;id0--;) {if (tmpCols[id0]>0) break; NRows--;}
+ for (int id0=nRows;id0--;) {if (tmpCols[id0]>0) break; nRows--;}
// find max significant column and fill the permanent storage for the max sigificant column of each row
- cheb->InitRows(NRows); // create needed arrays;
- int *NColsAtRow = cheb->GetNColsAtRow();
- int *ColAtRowBg = cheb->GetColAtRowBg();
- int NCols = 0;
+ cheb->InitRows(nRows); // create needed arrays;
+ UShort_t *nColsAtRow = cheb->GetNColsAtRow();
+ UShort_t *colAtRowBg = cheb->GetColAtRowBg();
+ int nCols = 0;
int NElemBound2D = 0;
- for (int id0=0;id0<NRows;id0++) {
- NColsAtRow[id0] = tmpCols[id0]; // number of columns to store for this row
- ColAtRowBg[id0] = NElemBound2D; // begining of this row in 2D boundary surface
+ for (int id0=0;id0<nRows;id0++) {
+ nColsAtRow[id0] = tmpCols[id0]; // number of columns to store for this row
+ colAtRowBg[id0] = NElemBound2D; // begining of this row in 2D boundary surface
NElemBound2D += tmpCols[id0];
- if (NCols<NColsAtRow[id0]) NCols = NColsAtRow[id0];
+ if (nCols<nColsAtRow[id0]) nCols = nColsAtRow[id0];
}
- cheb->InitCols(NCols);
+ cheb->InitCols(nCols);
delete[] tmpCols;
//
// create the 2D matrix defining the boundary of significance for 3D coeffs.matrix
// and count the number of siginifacnt coefficients
//
cheb->InitElemBound2D(NElemBound2D);
- int *CoefBound2D0 = cheb->GetCoefBound2D0();
- int *CoefBound2D1 = cheb->GetCoefBound2D1();
+ UShort_t *coefBound2D0 = cheb->GetCoefBound2D0();
+ UShort_t *coefBound2D1 = cheb->GetCoefBound2D1();
fMaxCoefs = 0; // redefine number of coeffs
- for (int id0=0;id0<NRows;id0++) {
- int nCLoc = NColsAtRow[id0];
- int Col0 = ColAtRowBg[id0];
+ for (int id0=0;id0<nRows;id0++) {
+ int nCLoc = nColsAtRow[id0];
+ int col0 = colAtRowBg[id0];
for (int id1=0;id1<nCLoc;id1++) {
- CoefBound2D0[Col0 + id1] = tmpCoefSurf[id1+id0*fNPoints[1]]; // number of coefs to store for 3-d dimension
- CoefBound2D1[Col0 + id1] = fMaxCoefs;
- fMaxCoefs += CoefBound2D0[Col0 + id1];
+ coefBound2D0[col0 + id1] = tmpCoefSurf[id1+id0*fNPoints[1]]; // number of coefs to store for 3-d dimension
+ coefBound2D1[col0 + id1] = fMaxCoefs;
+ fMaxCoefs += coefBound2D0[col0 + id1];
}
}
//
// create final compressed 3D matrix for significant coeffs
cheb->InitCoefs(fMaxCoefs);
- Float_t *Coefs = cheb->GetCoefs();
+ Float_t *coefs = cheb->GetCoefs();
int count = 0;
- for (int id0=0;id0<NRows;id0++) {
- int ncLoc = NColsAtRow[id0];
- int Col0 = ColAtRowBg[id0];
+ for (int id0=0;id0<nRows;id0++) {
+ int ncLoc = nColsAtRow[id0];
+ int col0 = colAtRowBg[id0];
for (int id1=0;id1<ncLoc;id1++) {
- int ncf2 = CoefBound2D0[Col0 + id1];
+ int ncf2 = coefBound2D0[col0 + id1];
for (int id2=0;id2<ncf2;id2++) {
- Coefs[count++] = tmpCoef3D[id2 + fNPoints[2]*(id1+id0*fNPoints[1])];
+ coefs[count++] = tmpCoef3D[id2 + fNPoints[2]*(id1+id0*fNPoints[1])];
}
}
}
}
#endif
+//__________________________________________________________________________________________
+#ifdef _INC_CREATION_ALICHEB3D_
+void AliCheb3D::InvertSign()
+{
+ // invert the sign of all parameterizations
+ for (int i=fDimOut;i--;) {
+ AliCheb3DCalc* par = GetChebCalc(i);
+ int ncf = par->GetNCoefs();
+ float *coefs = par->GetCoefs();
+ for (int j=ncf;j--;) coefs[j] = -coefs[j];
+ }
+}
+#endif
+
+
//_______________________________________________
void AliCheb3D::LoadData(const char* inpFile)
{
+ // load coefficients data from txt file
+ //
TString strf = inpFile;
gSystem->ExpandPathName(strf);
FILE* stream = fopen(strf.Data(),"r");
//_______________________________________________
void AliCheb3D::LoadData(FILE* stream)
{
+ // load coefficients data from stream
+ //
if (!stream) {Error("LoadData","No stream provided.\nStop"); exit(1);}
TString buffs;
Clear();
}
//_______________________________________________
-void AliCheb3D::SetDimOut(int d)
+void AliCheb3D::SetDimOut(const int d)
{
+ // init output dimensions
fDimOut = d;
if (fResTmp) delete fResTmp;
fResTmp = new Float_t[fDimOut];
//_______________________________________________
void AliCheb3D::ShiftBound(int id,float dif)
{
+ // modify the bounds of the grid
+ //
if (id<0||id>2) {printf("Maximum 3 dimensions are supported\n"); return;}
fBMin[id] += dif;
fBMax[id] += dif;
//_______________________________________________
#ifdef _INC_CREATION_ALICHEB3D_
+
+void AliCheb3D::EstimateNPoints(float Prec, int gridBC[3][3],Int_t npd1,Int_t npd2,Int_t npd3)
+{
+ // Estimate number of points to generate a training data
+ //
+ const int kScp = 9;
+ const float kScl[9] = {0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9};
+ //
+ const float sclDim[2] = {0.001,0.999};
+ const int compDim[3][2] = { {1,2}, {2,0}, {0,1} };
+ static float xyz[3];
+ Int_t npdTst[3] = {npd1,npd2,npd3};
+ //
+
+ for (int i=3;i--;)for (int j=3;j--;) gridBC[i][j] = -1;
+ //
+ for (int idim=0;idim<3;idim++) {
+ float dimMN = fBMin[idim] + sclDim[0]*(fBMax[idim]-fBMin[idim]);
+ float dimMX = fBMin[idim] + sclDim[1]*(fBMax[idim]-fBMin[idim]);
+ //
+ int id1 = compDim[idim][0]; // 1st fixed dim
+ int id2 = compDim[idim][1]; // 2nd fixed dim
+ for (int i1=0;i1<kScp;i1++) {
+ xyz[ id1 ] = fBMin[id1] + kScl[i1]*( fBMax[id1]-fBMin[id1] );
+ for (int i2=0;i2<kScp;i2++) {
+ xyz[ id2 ] = fBMin[id2] + kScl[i2]*( fBMax[id2]-fBMin[id2] );
+ int* npt = GetNCNeeded(xyz,idim, dimMN,dimMX, Prec, npdTst[idim]); // npoints for Bx,By,Bz
+ for (int ib=0;ib<3;ib++) if (npt[ib]>gridBC[ib][idim]) gridBC[ib][idim] = npt[ib];
+ }
+ }
+ }
+}
+
+/*
void AliCheb3D::EstimateNPoints(float Prec, int gridBC[3][3])
{
+ // Estimate number of points to generate a training data
+ //
const float sclA[9] = {0.1, 0.5, 0.9, 0.1, 0.5, 0.9, 0.1, 0.5, 0.9} ;
const float sclB[9] = {0.1, 0.1, 0.1, 0.5, 0.5, 0.5, 0.9, 0.9, 0.9} ;
const float sclDim[2] = {0.01,0.99};
xyz[ id2 ] = fBMin[id2] + sclB[it]*( fBMax[id2]-fBMin[id2] );
//
int* npt = GetNCNeeded(xyz,idim, dimMN,dimMX, Prec); // npoints for Bx,By,Bz
- for (int ib=0;ib<3;ib++) if (npt[ib]>gridBC[ib][idim]) gridBC[ib][idim] = npt[ib]+2;
+ for (int ib=0;ib<3;ib++) if (npt[ib]>gridBC[ib][idim]) gridBC[ib][idim] = npt[ib];//+2;
//
}
}
int* AliCheb3D::GetNCNeeded(float xyz[3],int DimVar, float mn,float mx, float prec)
{
- // estimate needed number of chebyshev coefs for given function desctiption in DimVar dimension
+ // estimate needed number of chebyshev coefs for given function description in DimVar dimension
// The values for two other dimensions must be set beforehand
//
static int curNC[3];
for (int i=0;i<3;i++) retNC[i] = -1;
for (int i=0;i<3;i++) fArgsTmp[i] = xyz[i];
//
- for (curNP=5; curNP<kMaxPoint; curNP+=5) {
+ for (curNP=3; curNP<kMaxPoint; curNP+=3) {
maxNCPrev = maxNC;
//
for (int i=0;i<curNP;i++) { // get function values on Cheb. nodes
return retNC;
//
}
+*/
+
+
+int* AliCheb3D::GetNCNeeded(float xyz[3],int DimVar, float mn,float mx, float prec, Int_t npCheck)
+{
+ // estimate needed number of chebyshev coefs for given function description in DimVar dimension
+ // The values for two other dimensions must be set beforehand
+ //
+ static int retNC[3];
+ static int npChLast = 0;
+ static float *gridVal=0,*coefs=0;
+ if (npCheck<3) npCheck = 3;
+ if (npChLast<npCheck) {
+ if (gridVal) delete[] gridVal;
+ if (coefs) delete[] coefs;
+ gridVal = new float[3*npCheck];
+ coefs = new float[3*npCheck];
+ npChLast = npCheck;
+ }
+ //
+ float scale = mx-mn;
+ float offs = mn + scale/2.0;
+ scale = 2./scale;
+ //
+ for (int i=0;i<3;i++) fArgsTmp[i] = xyz[i];
+ for (int i=0;i<npCheck;i++) {
+ fArgsTmp[DimVar] = TMath::Cos( TMath::Pi()*(i+0.5)/npCheck)/scale+offs; // map to requested interval
+ EvalUsrFunction();
+ for (int ib=3;ib--;) gridVal[ib*npCheck + i] = fResTmp[ib];
+ }
+ //
+ for (int ib=0;ib<3;ib++) retNC[ib] = AliCheb3D::CalcChebCoefs(&gridVal[ib*npCheck], npCheck, &coefs[ib*npCheck],prec);
+ return retNC;
+ //
+}
+
+
#endif
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff