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00044 #ifndef __G4TWISTTRAPALPHASIDE__
00045 #define __G4TWISTTRAPALPHASIDE__
00046
00047 #include "G4VTwistSurface.hh"
00048
00049 #include <vector>
00050
00051 class G4TwistTrapAlphaSide : public G4VTwistSurface
00052 {
00053 public:
00054
00055 G4TwistTrapAlphaSide(const G4String &name,
00056 G4double PhiTwist,
00057 G4double pDz,
00058 G4double pTheta,
00059 G4double pPhi,
00060 G4double pDy1,
00061 G4double pDx1,
00062 G4double pDx2,
00063 G4double pDy2,
00064 G4double pDx3,
00065 G4double pDx4,
00066 G4double pAlph,
00067 G4double AngleSide
00068 );
00069
00070 virtual ~G4TwistTrapAlphaSide();
00071
00072 virtual G4ThreeVector GetNormal(const G4ThreeVector &xx,
00073 G4bool isGlobal = false) ;
00074
00075 virtual G4int DistanceToSurface(const G4ThreeVector &gp,
00076 const G4ThreeVector &gv,
00077 G4ThreeVector gxx[],
00078 G4double distance[],
00079 G4int areacode[],
00080 G4bool isvalid[],
00081 EValidate validate = kValidateWithTol);
00082
00083 virtual G4int DistanceToSurface(const G4ThreeVector &gp,
00084 G4ThreeVector gxx[],
00085 G4double distance[],
00086 G4int areacode[]);
00087
00088
00089 public:
00090
00091 G4TwistTrapAlphaSide(__void__&);
00092
00093
00094
00095
00096 private:
00097
00098 virtual G4int GetAreaCode(const G4ThreeVector &xx,
00099 G4bool withTol = true);
00100 virtual void SetCorners();
00101 virtual void SetBoundaries();
00102
00103 void GetPhiUAtX(G4ThreeVector p, G4double &phi, G4double &u);
00104 G4ThreeVector ProjectPoint(const G4ThreeVector &p,
00105 G4bool isglobal = false);
00106
00107 virtual G4ThreeVector SurfacePoint(G4double phi, G4double u,
00108 G4bool isGlobal = false );
00109 virtual G4double GetBoundaryMin(G4double phi);
00110 virtual G4double GetBoundaryMax(G4double phi);
00111 virtual G4double GetSurfaceArea();
00112 virtual void GetFacets( G4int m, G4int n, G4double xyz[][3],
00113 G4int faces[][4], G4int iside );
00114
00115 inline G4ThreeVector NormAng(G4double phi, G4double u);
00116 inline G4double GetValueA(G4double phi);
00117 inline G4double GetValueB(G4double phi);
00118 inline G4double GetValueD(G4double phi);
00119 inline G4double Xcoef(G4double u,G4double phi);
00120
00121
00122 private:
00123
00124 G4double fTheta;
00125 G4double fPhi ;
00126
00127 G4double fDy1;
00128 G4double fDx1;
00129 G4double fDx2;
00130
00131 G4double fDy2;
00132 G4double fDx3;
00133 G4double fDx4;
00134
00135 G4double fDz;
00136
00137 G4double fAlph;
00138 G4double fTAlph;
00139
00140 G4double fPhiTwist;
00141
00142 G4double fAngleSide;
00143
00144 G4double fDx4plus2;
00145 G4double fDx4minus2;
00146 G4double fDx3plus1;
00147 G4double fDx3minus1;
00148 G4double fDy2plus1;
00149 G4double fDy2minus1;
00150 G4double fa1md1;
00151 G4double fa2md2;
00152
00153 G4double fdeltaX;
00154 G4double fdeltaY;
00155 };
00156
00157
00158
00159
00160
00161 inline
00162 G4double G4TwistTrapAlphaSide::GetValueA(G4double phi)
00163 {
00164 return ( fDx4plus2 + fDx4minus2 * ( 2 * phi ) / fPhiTwist ) ;
00165 }
00166
00167 inline
00168 G4double G4TwistTrapAlphaSide::GetValueD(G4double phi)
00169 {
00170 return ( fDx3plus1 + fDx3minus1 * ( 2 * phi) / fPhiTwist ) ;
00171 }
00172
00173 inline
00174 G4double G4TwistTrapAlphaSide::GetValueB(G4double phi)
00175 {
00176 return ( fDy2plus1 + fDy2minus1 * ( 2 * phi ) / fPhiTwist ) ;
00177 }
00178
00179
00180 inline
00181 G4double G4TwistTrapAlphaSide::Xcoef(G4double u, G4double phi)
00182 {
00183
00184 return GetValueA(phi)/2. + (GetValueD(phi)-GetValueA(phi))/4.
00185 - u*( ( GetValueD(phi)-GetValueA(phi) )/( 2 * GetValueB(phi) ) - fTAlph );
00186
00187 }
00188
00189 inline G4ThreeVector
00190 G4TwistTrapAlphaSide::SurfacePoint(G4double phi, G4double u , G4bool isGlobal)
00191 {
00192
00193
00194 G4ThreeVector SurfPoint ( Xcoef(u,phi) * std::cos(phi)
00195 - u * std::sin(phi) + fdeltaX*phi/fPhiTwist,
00196 Xcoef(u,phi) * std::sin(phi)
00197 + u * std::cos(phi) + fdeltaY*phi/fPhiTwist,
00198 2*fDz*phi/fPhiTwist );
00199 if (isGlobal) { return (fRot * SurfPoint + fTrans); }
00200 return SurfPoint;
00201 }
00202
00203 inline
00204 G4double G4TwistTrapAlphaSide::GetBoundaryMin(G4double phi)
00205 {
00206 return -0.5*GetValueB(phi) ;
00207 }
00208
00209 inline
00210 G4double G4TwistTrapAlphaSide::GetBoundaryMax(G4double phi)
00211 {
00212 return 0.5*GetValueB(phi) ;
00213 }
00214
00215 inline
00216 G4double G4TwistTrapAlphaSide::GetSurfaceArea()
00217 {
00218 return (fDz*(std::sqrt(16*fDy1*fDy1
00219 + (fa1md1 + 4*fDy1*fTAlph)*(fa1md1 + 4*fDy1*fTAlph))
00220 + std::sqrt(16*fDy2*fDy2 + (fa2md2 + 4*fDy2*fTAlph)
00221 * (fa2md2 + 4*fDy2*fTAlph))))/2. ;
00222 }
00223
00224 inline
00225 G4ThreeVector G4TwistTrapAlphaSide::NormAng( G4double phi, G4double u )
00226 {
00227
00228
00229
00230 G4ThreeVector nvec ( fDy1* fDz*(4*fDy1*std::cos(phi)
00231 + (fa1md1 + 4*fDy1*fTAlph)*std::sin(phi)),
00232 -(fDy1* fDz*((fa1md1 + 4*fDy1*fTAlph)*std::cos(phi)
00233 - 4*fDy1*std::sin(phi))),
00234 (fDy1*(-8*(fDx3minus1 + fDx4minus2)*fDy1
00235 + fa1md1*(fDx2 + fDx3plus1 + fDx4)*fPhiTwist
00236 + 4*(fDx2 + fDx3plus1 + fDx4)*fDy1*fPhiTwist
00237 *fTAlph + 2*(fDx3minus1 + fDx4minus2)
00238 *(fa1md1 + 4*fDy1*fTAlph)*phi)
00239 + fPhiTwist*(16*fDy1*fDy1
00240 + (fa1md1 + 4*fDy1*fTAlph)
00241 *(fa1md1 + 4*fDy1*fTAlph))*u
00242 + 4*fDy1*(fa1md1*fdeltaY - 4*fdeltaX*fDy1
00243 + 4*fdeltaY*fDy1*fTAlph)* std::cos(phi)
00244 - 4*fDy1*(fa1md1*fdeltaX + 4*fDy1*(fdeltaY
00245 + fdeltaX*fTAlph))*std::sin(phi))/ 8. ) ;
00246 return nvec.unit();
00247 }
00248
00249 #endif