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BrLine3Dclass description - source file - inheritance tree class BrLine3D : public TObject
public:
Data Members
private:
See alsoClass DescriptionBrLine3D Line class for Geometry. A line is defined by an origin and a unit vector defining its direction. BrLine3D() : TObject() Default constructor - empty BrLine3D(const BrVector3D& origin, const BrVector3D& direction) : TObject() Constructor BrVector3D ClosestPoint(const BrVector3D& vector) const Return the closest point on the line to the vector Double_t Distance(const BrVector3D& vector) const distance from a vector (i.e. point) to this line. BrLine3D GetShortestLineBetween(const BrLine3D &line) const Return the shortest line between the two lines. The length of the vector part is the shortest distance between the two lines. put in according to http://www.mhri.edu.au/~pdb/geometry/lineline3d/ 1/31/99 but not tested yet? Be careful before using in production mode. dmnop = (xm-xn)(xo-xp) + (ym-yn)(yo-yp) + (zm-zn)(zo-zp) Double_t GetShortestDistanceBetween(const BrLine3D &line) const Get shortest distance between the two lines. This should give the same answer as the modulus of GetShortestLineBetween(). Coded 1-31-99 but not tested. void Print(Option_t *option = "") const Simple output of this line Float_t RelativeOverlap(const BrLine3D& line, Float_t zl, Float_t r)
Calculate the relative overlap between "this" track and the given track
Parameters:
In: track pointer to the other track
zl length of detector (in local z direction)
r radius of cylinder around tracks
Algorithm:
A cylinder of radius r is put around each track.
The relative overlap is defined as the ratio between
the volume of the overlap region of two cylinders
and
the volume of the cylinder around "this" track is calculated.
The cylinders are distorted in order to have a circular intersection
between the cylinders and planes at arbitrary z.
Requires:
The tracks are parametrized as:
x = ax * z + bx
y = ay * z + by
void SetDirection(const BrVector3D& vector) set x, y, z void SetOrigin(const BrVector3D& vector) set x, y, z Inline Functions
BrLine3D& operator=(const BrLine3D&)
const BrVector3D& GetOrigin() const
const BrVector3D& GetDirection() const
void SetOrigin(Double_t x, Double_t y, Double_t z)
void SetDirection(Double_t x, Double_t y, Double_t z)
TClass* Class()
TClass* IsA() const
void ShowMembers(TMemberInspector& insp, char* parent)
void Streamer(TBuffer& b)
void StreamerNVirtual(TBuffer& b)
BrLine3D BrLine3D(BrLine3D&)
void ~BrLine3D()
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Copyright ; 2002 BRAHMS Collaboration
<brahmlib@rcf.rhic.bnl.gov>
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