| 1 | //
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| 2 | // ********************************************************************
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| 3 | // * License and Disclaimer *
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| 4 | // * *
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of *
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and *
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| 7 | // * conditions of the Geant4 Software License, included in the file *
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These *
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| 9 | // * include a list of copyright holders. *
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| 10 | // * *
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| 11 | // * Neither the authors of this software system, nor their employing *
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| 12 | // * institutes,nor the agencies providing financial support for this *
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| 13 | // * work make any representation or warranty, express or implied, *
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| 14 | // * regarding this software system or assume any liability for its *
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| 15 | // * use. Please see the license in the file LICENSE and URL above *
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| 16 | // * for the full disclaimer and the limitation of liability. *
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| 17 | // * *
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| 18 | // * This code implementation is the result of the scientific and *
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| 19 | // * technical work of the GEANT4 collaboration. *
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| 20 | // * By using, copying, modifying or distributing the software (or *
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| 21 | // * any work based on the software) you agree to acknowledge its *
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| 22 | // * use in resulting scientific publications, and indicate your *
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| 23 | // * acceptance of all terms of the Geant4 Software license. *
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| 24 | // ********************************************************************
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| 25 | //
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| 26 | //
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| 27 | // $Id: G4NeutronHPFastLegendre.hh,v 1.11 2006/06/29 20:47:39 gunter Exp $
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| 28 | // GEANT4 tag $Name: geant4-09-03-cand-01 $
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| 29 | //
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| 30 | #ifndef G4NeutronHPFastLegendre_h
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| 31 | #define G4NeutronHPFastLegendre_h 1
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| 32 |
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| 33 | #include "globals.hh"
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| 34 |
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| 35 | class G4NeutronHPFastLegendre
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| 36 | {
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| 37 | public:
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| 38 |
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| 39 | G4NeutronHPFastLegendre()
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| 40 | {
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| 41 | value = new G4double * [31];
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| 42 | value[0] = l0;
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| 43 | value[1] = l1;
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| 44 | value[2] = l2;
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| 45 | value[3] = l3;
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| 46 | value[4] = l4;
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| 47 | value[5] = l5;
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| 48 | value[6] = l6;
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| 49 | value[7] = l7;
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| 50 | value[8] = l8;
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| 51 | value[9] = l9;
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| 52 | value[10] = l10;
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| 53 | value[11] = l11;
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| 54 | value[12] = l12;
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| 55 | value[13] = l13;
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| 56 | value[14] = l14;
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| 57 | value[15] = l15;
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| 58 | value[16] = l16;
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| 59 | value[17] = l17;
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| 60 | value[18] = l18;
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| 61 | value[19] = l19;
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| 62 | value[20] = l20;
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| 63 | value[21] = l21;
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| 64 | value[22] = l22;
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| 65 | value[23] = l23;
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| 66 | value[24] = l24;
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| 67 | value[25] = l25;
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| 68 | value[26] = l26;
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| 69 | value[27] = l27;
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| 70 | value[28] = l28;
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| 71 | value[29] = l29;
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| 72 | value[30] = l30;
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| 73 | integral = new G4double * [31];
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| 74 | integral[0] = i0;
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| 75 | integral[1] = i1;
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| 76 | integral[2] = i2;
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| 77 | integral[3] = i3;
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| 78 | integral[4] = i4;
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| 79 | integral[5] = i5;
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| 80 | integral[6] = i6;
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| 81 | integral[7] = i7;
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| 82 | integral[8] = i8;
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| 83 | integral[9] = i9;
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| 84 | integral[10] = i10;
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| 85 | integral[11] = i11;
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| 86 | integral[12] = i12;
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| 87 | integral[13] = i13;
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| 88 | integral[14] = i14;
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| 89 | integral[15] = i15;
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| 90 | integral[16] = i16;
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| 91 | integral[17] = i17;
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| 92 | integral[18] = i18;
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| 93 | integral[19] = i19;
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| 94 | integral[20] = i20;
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| 95 | integral[21] = i21;
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| 96 | integral[22] = i22;
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| 97 | integral[23] = i23;
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| 98 | integral[24] = i24;
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| 99 | integral[25] = i25;
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| 100 | integral[26] = i26;
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| 101 | integral[27] = i27;
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| 102 | integral[28] = i28;
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| 103 | integral[29] = i29;
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| 104 | integral[30] = i30;
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| 105 |
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| 106 | G4int i;
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| 107 | for(i=0;i<31;i++) theNbin[i]=1+200*(i+1);
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| 108 | }
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| 109 |
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| 110 | ~G4NeutronHPFastLegendre()
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| 111 | {
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| 112 | delete [] value;
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| 113 | delete [] integral;
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| 114 | }
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| 115 |
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| 116 | G4double Integrate(G4int l, G4double costh)
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| 117 | {
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| 118 | G4int bin = GetBin(l, costh);
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| 119 | G4double y1, y2;
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| 120 | // G4cout <<"Testhpw G4NeutronHPFastLegendre::Integrate "<<l<<" "<<bin<<G4endl;
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| 121 | y1 = integral[l][bin];
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| 122 | y2 = integral[l][bin+1];
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| 123 | // G4cout <<"Testhpw G4NeutronHPFastLegendre::Integrate exit"<<G4endl;
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| 124 | return Interpolate(bin, l, y1, y2, costh);
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| 125 | }
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| 126 |
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| 127 | inline G4double Evaluate(G4int l, G4double costh)
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| 128 | {
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| 129 | G4double result;
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| 130 | G4int bin = GetBin(l, costh);
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| 131 | if(bin != theNbin[l]-1)
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| 132 | {
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| 133 | G4double y1, y2;
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| 134 | y1 = value[l][bin];
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| 135 | y2 = value[l][bin+1];
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| 136 | result = Interpolate(bin, l, y1, y2, costh);
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| 137 | }
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| 138 | else
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| 139 | {
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| 140 | result = value[l][bin];
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| 141 | }
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| 142 | return result;
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| 143 | }
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| 144 | private:
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| 145 |
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| 146 | inline G4int GetBin(G4int l, G4double costh)
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| 147 | {
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| 148 | G4int bin=0;
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| 149 | bin = G4int( (theNbin[l]-1)*(costh+1)/2. );
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| 150 | if(bin == theNbin[l]-1) bin--;
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| 151 | return bin;
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| 152 | }
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| 153 |
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| 154 | inline G4double Interpolate(G4int bin, G4int l, G4double y1, G4double y2, G4double x)
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| 155 | {
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| 156 | G4double slope = 0, off = 0, x2=0, x1mx2;
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| 157 | G4int half = (theNbin[l]-1)/2;
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| 158 | // x1 = (bin-half)/G4double(half);
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| 159 | x2 = (bin+1-half)/G4double(half);
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| 160 | x1mx2 = 1./G4double( (theNbin[l]-1)/2 );
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| 161 | // slope = (y2-y1)/(x2-x1);
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| 162 | slope = (y2-y1)/x1mx2;
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| 163 | off = y2-x2*slope;
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| 164 | return x*slope+off;
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| 165 | }
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| 166 |
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| 167 | G4double ** value;
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| 168 | G4double ** integral;
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| 169 | G4int theNbin[31];
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| 170 | static G4double l0[201];
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| 171 | static G4double i0[201];
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| 172 | static G4double l1[401];
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| 173 | static G4double i1[401];
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| 174 | static G4double l2[601];
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| 175 | static G4double i2[601];
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| 176 | static G4double l3[801];
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| 177 | static G4double i3[801];
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| 178 | static G4double l4[1001];
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| 179 | static G4double i4[1001];
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| 180 | static G4double l5[1201];
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| 181 | static G4double i5[1201];
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| 182 | static G4double l6[1401];
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| 183 | static G4double i6[1401];
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| 184 | static G4double l7[1601];
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| 185 | static G4double i7[1601];
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| 186 | static G4double l8[1801];
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| 187 | static G4double i8[1801];
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| 188 | static G4double l9[2001];
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| 189 | static G4double i9[2001];
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| 190 | static G4double l10[2201];
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| 191 | static G4double i10[2201];
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| 192 | static G4double l11[2401];
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| 193 | static G4double i11[2401];
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| 194 | static G4double l12[2601];
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| 195 | static G4double i12[2601];
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| 196 | static G4double l13[2801];
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| 197 | static G4double i13[2801];
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| 198 | static G4double l14[3001];
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| 199 | static G4double i14[3001];
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| 200 | static G4double l15[3201];
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| 201 | static G4double i15[3201];
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| 202 | static G4double l16[3401];
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| 203 | static G4double i16[3401];
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| 204 | static G4double l17[3601];
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| 205 | static G4double i17[3601];
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| 206 | static G4double l18[3801];
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| 207 | static G4double i18[3801];
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| 208 | static G4double l19[4001];
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| 209 | static G4double i19[4001];
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| 210 | static G4double l20[4201];
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| 211 | static G4double i20[4201];
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| 212 | static G4double l21[4401];
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| 213 | static G4double i21[4401];
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| 214 | static G4double l22[4601];
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| 215 | static G4double i22[4601];
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| 216 | static G4double l23[4801];
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| 217 | static G4double i23[4801];
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| 218 | static G4double l24[5001];
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| 219 | static G4double i24[5001];
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| 220 | static G4double l25[5201];
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| 221 | static G4double i25[5201];
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| 222 | static G4double l26[5401];
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| 223 | static G4double i26[5401];
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| 224 | static G4double l27[5601];
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| 225 | static G4double i27[5601];
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| 226 | static G4double l28[5801];
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| 227 | static G4double i28[5801];
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| 228 | static G4double l29[6001];
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| 229 | static G4double i29[6001];
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| 230 | static G4double l30[6201];
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| 231 | static G4double i30[6201];
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| 232 | };
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| 233 | #endif
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