Gabriele Cosmo
149 lines
4.6 KiB
C++
149 lines
4.6 KiB
C++
// This code implementation is the intellectual property of
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// the RD44 GEANT4 collaboration.
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//
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// By copying, distributing or modifying the Program (or any work
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// based on the Program) you indicate your acceptance of this statement,
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// and all its terms.
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//
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// $Id: G4Torus.hh,v 2.1 1998/07/12 02:56:50 urbi Exp $
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// GEANT4 tag $Name: geant4-00 $
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//
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//
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// class G4Torus
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//
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// A torus or torus segment with curved sides parallel to
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// the z-axis. The torus has a specified swept radius
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// about which it is centred, and a given
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// minimum and maximum radius. A minimum radius of 0
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// signifies a filled torus . The torus segment is
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// specified by starting and delta
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// angles for phi, with 0 being the +x axis, PI/2
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// the +y axis. A delta angle of 2PI signifies a
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// complete, unsegmented torus/cylindr.
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//
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// Member functions:
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//
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// As inherited from G4CSGSolid+
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//
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// G4Torus(const G4String &pName
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// G4double pRmin
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// G4double pRmax
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// G4double pRtor
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// G4double pSPhi
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// G4double pDPhi )
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//
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// Construct a torus with the given name and dimensions.
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// The angles are provided is radians. pRtor >= pRmax
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//
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//
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// Protected:
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//
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// G4ThreeVectorList*
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// CreateRotatedVertices(const G4AffineTransform& pTransform) const
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//
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// Create the List of transformed vertices in the format required
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// for G4VSolid:: ClipCrossSection and ClipBetweenSections.
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//
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// Member Data:
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//
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// fRmin Inside radius
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// fRmax Outside radius
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// fRtor swept radius of torus
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//
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// fSPhi The starting phi angle in radians,
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// adjusted such the fSPhi+fDPhi<=2PI,
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// fSPhi>-2PI
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//
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// fDPhi Delta angle of the segment in radians
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//
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// You could find very often in G4Torus:: functions the values like pt or
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// it . These are the distances from p or i G4ThreeVector points in the
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// plane (Z axis points p or i) to fRtor point in XY plane. This value is
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// similar to rho for G4Tubs and is used for definiton of the point
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// relative to fRmin and fRmax, i.e. for solution of inside/outside
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// problems
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//
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//
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// History:
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// 30.10.96 V.Grichine First version of G4Torus
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// 21.04.98 J.Apostolakis Added SetAllParameters function
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#ifndef G4Torus_HH
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#define G4Torus_HH
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#include "G4CSGSolid.hh"
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class G4Torus : public G4CSGSolid {
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public:
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G4Torus(const G4String &pName,
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G4double pRmin,
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G4double pRmax,
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G4double pRtor,
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G4double pSPhi,
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G4double pDPhi);
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virtual ~G4Torus();
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void SetAllParameters(G4double pRmin, G4double pRmax, G4double pRtor,
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G4double pSPhi, G4double pDPhi);
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void ComputeDimensions(G4VPVParameterisation* p,
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const G4int n,
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const G4VPhysicalVolume* pRep);
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G4int TorusRoots(G4double Ri,
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const G4ThreeVector& p,
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const G4ThreeVector& v) const ;
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G4bool CalculateExtent(const EAxis pAxis,
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const G4VoxelLimits& pVoxelLimit,
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const G4AffineTransform& pTransform,
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G4double& pmin, G4double& pmax) const;
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G4double GetRmin() const { return fRmin ; }
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G4double GetRmax() const { return fRmax ; }
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G4double GetRtor () const { return fRtor ; }
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G4double GetSPhi() const { return fSPhi ; }
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G4double GetDPhi() const { return fDPhi ; }
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EInside Inside(const G4ThreeVector& p) const;
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G4ThreeVector SurfaceNormal( const G4ThreeVector& p) const;
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G4double DistanceToIn(const G4ThreeVector& p,const G4ThreeVector& v) const;
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G4double DistanceToIn(const G4ThreeVector& p) const;
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G4double DistanceToOut(const G4ThreeVector& p,const G4ThreeVector& v,
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const G4bool calcNorm=G4bool(false),
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G4bool *validNorm=0,G4ThreeVector *n=0) const;
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G4double DistanceToOut(const G4ThreeVector& p) const;
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// Naming method (pseudo-RTTI : run-time type identification)
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virtual G4GeometryType GetEntityType() const { return G4String("G4Torus"); }
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// Visualisation functions
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void DescribeYourselfTo (G4VGraphicsScene& scene) const;
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G4VisExtent GetExtent () const;
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G4Polyhedron* CreatePolyhedron () const;
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G4NURBS* CreateNURBS () const;
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protected:
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G4int SolveBiQuadratic(double c[], double s[] ) const ;
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G4int SolveCubic(double c[], double s[] ) const ;
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G4int SolveQuadratic(double c[], double s[] ) const ;
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G4ThreeVectorList*
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CreateRotatedVertices(const G4AffineTransform& pTransform,
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G4int& noPolygonVertices) const;
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G4double fRmin,fRmax,fRtor,fSPhi,fDPhi;
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// Used by distanceToOut
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enum ESide {kNull,kRMin,kRMax,kSPhi,kEPhi};
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// used by normal
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enum ENorm {kNRMin,kNRMax,kNSPhi,kNEPhi};
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};
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#endif
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