Geant4  10.01.p03
G4Trap.icc
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27 // $Id: G4Trap.icc 66356 2012-12-18 09:02:32Z gcosmo $
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29 // --------------------------------------------------------------------
30 // GEANT 4 inline definitions file
31 //
32 // G4Trap.icc
33 //
34 // Implementation of inline methods of G4Trap
35 // --------------------------------------------------------------------
36 
37 inline
38 G4double G4Trap::GetZHalfLength() const
39 {
40  return fDz ;
41 }
42 
43 inline
44 G4ThreeVector G4Trap::GetSymAxis() const
45 {
46  G4double cosTheta = 1.0/std::sqrt(1+fTthetaCphi*fTthetaCphi +
47  fTthetaSphi*fTthetaSphi) ;
48 
49  return G4ThreeVector(fTthetaCphi*cosTheta,
50  fTthetaSphi*cosTheta,
51  cosTheta) ;
52 }
53 
54 inline
55 G4double G4Trap::GetYHalfLength1() const
56 {
57  return fDy1 ;
58 }
59 
60 inline
61 G4double G4Trap::GetXHalfLength1() const
62 {
63  return fDx1 ;
64 }
65 
66 inline
67 G4double G4Trap::GetXHalfLength2() const
68 {
69  return fDx2 ;
70 }
71 
72 inline
73 G4double G4Trap::GetTanAlpha1() const
74 {
75  return fTalpha1 ;
76 }
77 
78 inline
79 G4double G4Trap::GetYHalfLength2() const
80 {
81  return fDy2 ;
82 }
83 
84 inline
85 G4double G4Trap::GetXHalfLength3() const
86 {
87  return fDx3 ;
88 }
89 
90 inline
91 G4double G4Trap::GetXHalfLength4() const
92 {
93  return fDx4 ;
94 }
95 
96 inline
97 G4double G4Trap::GetTanAlpha2() const
98 {
99  return fTalpha2 ;
100 }
101 
102 inline
103 TrapSidePlane G4Trap::GetSidePlane( G4int n ) const
104 {
105  return fPlanes[n] ;
106 }
107 
108 inline
109 G4double G4Trap::GetFaceArea(const G4ThreeVector& p0, const G4ThreeVector& p1,
110  const G4ThreeVector& p2, const G4ThreeVector& p3)
111 {
112  G4double area = 0.5*((p1-p0).cross(p2-p1).mag()+(p3-p2).cross(p0-p3).mag());
113  return area;
114 }
115 
116 inline
117 G4double G4Trap::GetCubicVolume()
118 {
119  if(fCubicVolume != 0.) {;}
120  else { fCubicVolume = fDz*( (fDx1+fDx2+fDx3+fDx4)*(fDy1+fDy2)
121  + (fDx4+fDx3-fDx2-fDx1)*(fDy2-fDy1)/3 ); }
122  return fCubicVolume;
123 }
124 
125 inline
126 G4double G4Trap::GetSurfaceArea()
127 {
128  if(fSurfaceArea != 0.) {;}
129  else
130  {
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);
137 
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);
144 
145  G4ThreeVector cr;
146  cr = ba.cross(bc);
147  G4double babc=cr.mag();
148  cr = dc.cross(da);
149  G4double dcda=cr.mag();
150  cr = ef.cross(eh);
151  G4double efeh=cr.mag();
152  cr = gh.cross(gf);
153  G4double ghgf=cr.mag();
154 
155  fSurfaceArea = 2*fDy1*(fDx1+fDx2)+2*fDy2*(fDx3+fDx4)
156  + (fDx1+fDx3)
157  * std::sqrt(4*fDz*fDz+std::pow(fDy2-fDy1-2*fDz*fTthetaSphi,2))
158  + (fDx2+fDx4)
159  * std::sqrt(4*fDz*fDz+std::pow(fDy2-fDy1+2*fDz*fTthetaSphi,2))
160  + 0.5*(babc+dcda+efeh+ghgf);
161  }
162  return fSurfaceArea;
163 }