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27 // $Id: G4Trap.icc 66356 2012-12-18 09:02:32Z gcosmo $
29 // --------------------------------------------------------------------
30 // GEANT 4 inline definitions file
34 // Implementation of inline methods of G4Trap
35 // --------------------------------------------------------------------
38 G4double G4Trap::GetZHalfLength() const
44 G4ThreeVector G4Trap::GetSymAxis() const
46 G4double cosTheta = 1.0/std::sqrt(1+fTthetaCphi*fTthetaCphi +
47 fTthetaSphi*fTthetaSphi) ;
49 return G4ThreeVector(fTthetaCphi*cosTheta,
55 G4double G4Trap::GetYHalfLength1() const
61 G4double G4Trap::GetXHalfLength1() const
67 G4double G4Trap::GetXHalfLength2() const
73 G4double G4Trap::GetTanAlpha1() const
79 G4double G4Trap::GetYHalfLength2() const
85 G4double G4Trap::GetXHalfLength3() const
91 G4double G4Trap::GetXHalfLength4() const
97 G4double G4Trap::GetTanAlpha2() const
103 TrapSidePlane G4Trap::GetSidePlane( G4int n ) const
109 G4double G4Trap::GetFaceArea(const G4ThreeVector& p0, const G4ThreeVector& p1,
110 const G4ThreeVector& p2, const G4ThreeVector& p3)
112 G4double area = 0.5*((p1-p0).cross(p2-p1).mag()+(p3-p2).cross(p0-p3).mag());
117 G4double G4Trap::GetCubicVolume()
119 if(fCubicVolume != 0.) {;}
120 else { fCubicVolume = fDz*( (fDx1+fDx2+fDx3+fDx4)*(fDy1+fDy2)
121 + (fDx4+fDx3-fDx2-fDx1)*(fDy2-fDy1)/3 ); }
126 G4double G4Trap::GetSurfaceArea()
128 if(fSurfaceArea != 0.) {;}
131 G4ThreeVector ba(fDx1-fDx2+fTalpha1*2*fDy1,2*fDy1,0);
132 G4ThreeVector bc(2*fDz*fTthetaCphi-(fDx4-fDx2)+fTalpha2*fDy2-fTalpha1*fDy1,
133 2*fDz*fTthetaSphi+fDy2-fDy1, 2*fDz);
134 G4ThreeVector dc(-fDx4+fDx3+2*fTalpha2*fDy2, 2*fDy2,0);
135 G4ThreeVector da(-2*fDz*fTthetaCphi-(fDx1-fDx3)-fTalpha1*fDy1+fTalpha2*fDy2,
136 -2*fDz*fTthetaSphi-fDy1+fDy2,-2*fDz);
138 G4ThreeVector ef(fDx2-fDx1+2*fTalpha1*fDy1, 2*fDy1,0);
139 G4ThreeVector eh(2*fDz*fTthetaCphi+fDx3-fDx1+fTalpha1*fDy1-fTalpha2*fDy2,
140 2*fDz*fTthetaSphi-fDy2+fDy1,2*fDz);
141 G4ThreeVector gh(fDx3-fDx4-2*fTalpha2*fDy2, -2*fDy2,0);
142 G4ThreeVector gf(-2*fDz*fTthetaCphi+fDx2-fDx4+fTalpha1*fDy1-fTalpha2*fDy2,
143 -2*fDz*fTthetaSphi+fDy1-fDy2,-2*fDz);
147 G4double babc=cr.mag();
149 G4double dcda=cr.mag();
151 G4double efeh=cr.mag();
153 G4double ghgf=cr.mag();
155 fSurfaceArea = 2*fDy1*(fDx1+fDx2)+2*fDy2*(fDx3+fDx4)
157 * std::sqrt(4*fDz*fDz+std::pow(fDy2-fDy1-2*fDz*fTthetaSphi,2))
159 * std::sqrt(4*fDz*fDz+std::pow(fDy2-fDy1+2*fDz*fTthetaSphi,2))
160 + 0.5*(babc+dcda+efeh+ghgf);