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G4TwistTrapFlatSide.hh
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27 // $Id: G4TwistTrapFlatSide.hh 67011 2013-01-29 16:17:41Z gcosmo $
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29 //
30 // --------------------------------------------------------------------
31 // GEANT 4 class header file
32 //
33 //
34 // G4FlatTrapSurface
35 //
36 // Class description:
37 //
38 // Class describing a flat boundary surface for a trapezoid.
39 
40 // Author:
41 //
42 // 27-Oct-2004 - O.Link (Oliver.Link@cern.ch)
43 //
44 // --------------------------------------------------------------------
45 #ifndef __G4TWISTTRAPFLATSIDE__
46 #define __G4TWISTTRAPFLATSIDE__
47 
48 #include "G4VTwistSurface.hh"
49 
51 {
52  public: // with description
53 
55  G4double PhiTwist,
56  G4double pDx1,
57  G4double pDx2,
58  G4double pDy,
59  G4double pDz,
60  G4double pAlpha,
61  G4double pPhi,
62  G4double pTheta,
63  G4int handedness );
64  virtual ~G4TwistTrapFlatSide();
65 
66  virtual G4ThreeVector GetNormal(const G4ThreeVector & /* xx */ ,
67  G4bool isGlobal = false);
68  virtual G4int DistanceToSurface(const G4ThreeVector &gp,
69  const G4ThreeVector &gv,
70  G4ThreeVector gxx[],
71  G4double distance[],
72  G4int areacode[],
73  G4bool isvalid[],
74  EValidate validate = kValidateWithTol);
75 
76  virtual G4int DistanceToSurface(const G4ThreeVector &gp,
77  G4ThreeVector gxx[],
78  G4double distance[],
79  G4int areacode[]);
80 
81 
83  G4bool isGlobal = false);
84  virtual G4double GetBoundaryMin(G4double u);
85  virtual G4double GetBoundaryMax(G4double u);
86  virtual G4double GetSurfaceArea();
87  virtual void GetFacets( G4int m, G4int n, G4double xyz[][3],
88  G4int faces[][4], G4int iside );
89 
90  public: // without description
91 
92  G4TwistTrapFlatSide(__void__&);
93  // Fake default constructor for usage restricted to direct object
94  // persistency for clients requiring preallocation of memory for
95  // persistifiable objects.
96 
97  protected: // with description
98 
99  virtual G4int GetAreaCode(const G4ThreeVector &xx,
100  G4bool withTol = true);
101 
102  private:
103 
104  virtual void SetCorners();
105  virtual void SetBoundaries();
106 
107  inline double xAxisMax(G4double u, G4double fTanAlpha) const;
108 
109  private:
110 
111  G4double fDx1;
112  G4double fDx2;
113  G4double fDy;
114  G4double fDz;
115  G4double fPhiTwist;
116  G4double fAlpha;
117  G4double fTAlph;
118  G4double fPhi;
119  G4double fTheta;
120  G4double fdeltaX;
121  G4double fdeltaY;
122 };
123 
124 //========================================================
125 // inline functions
126 //========================================================
127 
128 inline
129 G4double G4TwistTrapFlatSide::xAxisMax(G4double u, G4double fTanAlpha) const
130 {
131  return ( ( fDx2 + fDx1 )/2. + u*(fDx2 - fDx1)/(2.*fDy) + u *fTanAlpha ) ;
132 }
133 
134 inline G4ThreeVector
136 {
137  G4ThreeVector SurfPoint ( x,y,0);
138 
139  if (isGlobal) { return (fRot*SurfPoint + fTrans); }
140  return SurfPoint;
141 }
142 
143 inline
145 {
146  return -xAxisMax(y, -fTAlph ) ;
147 }
148 
149 inline
151 {
152  return xAxisMax(y, fTAlph ) ;
153 }
154 
155 inline
157 {
158  return 2*(fDx1 + fDx2)*fDy ;
159 }
160 
161 #endif