| Geant4 Cross Reference |
1 //
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25 //
26 // G4EnclosingCylinder
27 //
28 // Class description:
29 //
30 // Definition of a utility class for quickly deciding if a point
31 // is clearly outside a polyhedra or polycone or deciding if
32 // a trajectory is clearly going to miss those shapes.
33
34 // Author: David C. Williams (davidw@scipp.ucsc.edu)
35 // --------------------------------------------------------------------
36 #ifndef G4ENCLOSINGCYLINDER_HH
37 #define G4ENCLOSINGCYLINDER_HH
38
39 #include "G4Types.hh"
40 #include "geomdefs.hh"
41 #include "G4ThreeVector.hh"
42
43 class G4ReduciblePolygon;
44
45 class G4EnclosingCylinder
46 {
47 public:
48
49 G4EnclosingCylinder( const G4ReduciblePolygon* rz,
50 G4bool phiIsOpen,
51 G4double startPhi, G4double totalPhi );
52 ~G4EnclosingCylinder() = default;
53
54 G4bool MustBeOutside( const G4ThreeVector& p ) const;
55 // Decide very rapidly if the point is outside the cylinder.
56 // If one is not certain, return false.
57
58 G4bool ShouldMiss( const G4ThreeVector& p, const G4ThreeVector& v ) const;
59 // Decide very rapidly if the trajectory is going to miss the cylinder.
60 // If one is not sure, return false.
61
62 G4EnclosingCylinder(__void__&);
63 // Fake default constructor for usage restricted to direct object
64 // persistency for clients requiring preallocation of memory for
65 // persistifiable objects.
66
67 protected:
68
69 G4double radius; // radius of our cylinder
70 G4double zLo, zHi; // z extent
71
72 G4bool phiIsOpen; // true if there is a phi segment
73 G4double startPhi, // for isPhiOpen==true, starting of phi segment
74 totalPhi; // for isPhiOpen==true, size of phi segment
75
76 G4double rx1=0.0, ry1=0.0,
77 dx1=0.0, dy1=0.0;
78 G4double rx2=0.0, ry2=0.0,
79 dx2=0.0, dy2=0.0;
80
81 G4bool concave; // true, if x/y cross section is concave
82 };
83
84 #endif
85