Geant4  10.00.p02
G4TessellatedGeometryAlgorithms.hh
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27 // $Id:
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29 // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
30 //
31 // Class G4TessellatedGeometryAlgorithms
32 //
33 // Class description:
34 //
35 // The G4TessellatedGeometryAlgorithms class is used to contain standard
36 // routines to determine whether (and if so where) simple geometric shapes
37 // intersect.
38 //
39 // The constructor doesn't need to do anything, and neither does the
40 // destructor.
41 //
42 // IntersectLineAndTriangle2D
43 // Determines whether there is an intersection between a line defined
44 // by r = p + s.v and a triangle defined by verticies P0, P0+E0 and P0+E1.
45 // Here:
46 // p = 2D vector
47 // s = scaler on [0,infinity)
48 // v = 2D vector
49 // P0, E0 and E1 are 2D vectors
50 // Information about where the intersection occurs is returned in the
51 // variable location.
52 //
53 // IntersectLineAndLineSegment2D
54 // Determines whether there is an intersection between a line defined
55 // by r = P0 + s.D0 and a line-segment with endpoints P1 and P1+D1.
56 // Here:
57 // P0 = 2D vector
58 // s = scaler on [0,infinity)
59 // D0 = 2D vector
60 // P1 and D1 are 2D vectors
61 // Information about where the intersection occurs is returned in the
62 // variable location.
63 
64 // CHANGE HISTORY
65 // --------------
66 //
67 // 07 August 2007, P R Truscott, QinetiQ Ltd, UK - Created, with member
68 // functions based on the work of Rickard Holmberg.
69 // 12 October 2012, M Gayer, CERN, - Reviewed optimized implementation.
70 //
72 #ifndef G4TessellatedGeometryAlgorithms_hh
73 #define G4TessellatedGeometryAlgorithms_hh 1
74 
75 #include "G4TwoVector.hh"
76 
78 {
79  public:
80 
82  const G4TwoVector &v,
83  const G4TwoVector &p0,
84  const G4TwoVector &e0,
85  const G4TwoVector &e1,
86  G4TwoVector location[2]);
88  const G4TwoVector &d0,
89  const G4TwoVector &p1,
90  const G4TwoVector &d1,
91  G4TwoVector location[2]);
92  static G4double cross(const G4TwoVector &v1, const G4TwoVector &v2);
93 };
94 
95 #endif
static const G4double d1
static G4double cross(const G4TwoVector &v1, const G4TwoVector &v2)
int G4int
Definition: G4Types.hh:78
bool G4bool
Definition: G4Types.hh:79
static G4bool IntersectLineAndTriangle2D(const G4TwoVector &p, const G4TwoVector &v, const G4TwoVector &p0, const G4TwoVector &e0, const G4TwoVector &e1, G4TwoVector location[2])
static const G4double e1
CLHEP::Hep2Vector G4TwoVector
Definition: G4TwoVector.hh:42
double G4double
Definition: G4Types.hh:76
static G4int IntersectLineAndLineSegment2D(const G4TwoVector &p0, const G4TwoVector &d0, const G4TwoVector &p1, const G4TwoVector &d1, G4TwoVector location[2])