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// $Id: G4Para.hh,v 1.20 2010/10/19 15:42:09 gcosmo Exp $
// GEANT4 tag $Name: geant4-09-04 $
//
//
// --------------------------------------------------------------------
// GEANT 4 class header file
//
// G4Para
//
// Class description:
//
// A G4Parallepiped, essentially a box with half lengths dx,dy,dz
// `skewed' so that there are angles theta & phi of the polar line
// joining the faces at +-dz in z, and alpha formed by the y axis
// and the plane joinng the centre of the faces G4Parallel to the
// z-x plane at -dy and +dy.
//
// A G4Para is defined by:
// dx,dy,dz - Half-length in x,y,z
// alpha - Angle formed by the y axis and by the plane joining
// the centre of the faces G4Parallel to the z-x plane
// at -dy and +dy
// theta - Polar angle of the line joining the centres of the
// faces at -dz and +dz in z
// phi - Azimuthal angle of the line joining the centres of the
// faces at -dz and +dz in z
// Member data:
//
// Note that the angles parameters are not stored - precomputed trig is
// stored instead.
//
// fDx Half-length in x
// fDy Half-length in y
// fDz Half-length in z
//
// fTalpha Tan of alpha
// fTthetaCphi Tan theta * Cos phi
// fTthetaSphi Tan theta * Sin phi
// History:
// 21.3.94 P.Kent Old C++ code converted to tolerant geometry
// 31.10.96 V.Grichine Modifications according G4Box/Tubs before to commit
// 18.11.99 V.Grichine , kUndefined was added to ESide
// --------------------------------------------------------------------
#ifndef G4Para_HH
#define G4Para_HH
#include "G4CSGSolid.hh"
class G4Para : public G4CSGSolid
{
public: // with description
G4Para(const G4String& pName,
G4double pDx, G4double pDy, G4double pDz,
G4double pAlpha, G4double pTheta, G4double pPhi);
G4Para(const G4String& pName,
const G4ThreeVector pt[8]);
virtual ~G4Para();
// Accessors
inline G4double GetZHalfLength() const;
inline G4ThreeVector GetSymAxis() const;
inline G4double GetYHalfLength() const;
inline G4double GetXHalfLength() const;
inline G4double GetTanAlpha() const;
// Modifiers
inline void SetXHalfLength(G4double val);
inline void SetYHalfLength(G4double val);
inline void SetZHalfLength(G4double val);
inline void SetAlpha(G4double alpha);
inline void SetTanAlpha(G4double val);
inline void SetThetaAndPhi(double pTheta, double pPhi);
void SetAllParameters(G4double pDx, G4double pDy, G4double pDz,
G4double pAlpha, G4double pTheta, G4double pPhi);
// Other methods of solid
inline G4double GetCubicVolume();
inline G4double GetSurfaceArea();
void ComputeDimensions(G4VPVParameterisation* p,
const G4int n,
const G4VPhysicalVolume* pRep);
G4bool CalculateExtent(const EAxis pAxis,
const G4VoxelLimits& pVoxelLimit,
const G4AffineTransform& pTransform,
G4double& pMin, G4double& pMax) const;
EInside Inside(const G4ThreeVector& p) const;
G4ThreeVector SurfaceNormal( const G4ThreeVector& p) const;
G4double DistanceToIn(const G4ThreeVector& p,
const G4ThreeVector& v) const;
G4double DistanceToIn(const G4ThreeVector& p) const;
G4double DistanceToOut(const G4ThreeVector& p, const G4ThreeVector& v,
const G4bool calcNorm=G4bool(false),
G4bool *validNorm=0, G4ThreeVector *n=0) const;
G4double DistanceToOut(const G4ThreeVector& p) const;
G4GeometryType GetEntityType() const;
G4ThreeVector GetPointOnSurface() const;
G4VSolid* Clone() const;
std::ostream& StreamInfo(std::ostream& os) const;
// Visualisation functions
void DescribeYourselfTo (G4VGraphicsScene& scene) const;
G4Polyhedron* CreatePolyhedron () const;
G4NURBS* CreateNURBS () const;
public: // without description
G4Para(__void__&);
// Fake default constructor for usage restricted to direct object
// persistency for clients requiring preallocation of memory for
// persistifiable objects.
G4Para(const G4Para& rhs);
G4Para& operator=(const G4Para& rhs);
// Copy constructor and assignment operator.
protected: // without description
G4ThreeVectorList*
CreateRotatedVertices(const G4AffineTransform& pTransform) const;
private:
G4ThreeVector ApproxSurfaceNormal( const G4ThreeVector& p) const;
// Algorithm for SurfaceNormal() following the original
// specification for points not on the surface
G4ThreeVector GetPointOnPlane(G4ThreeVector p0, G4ThreeVector p1,
G4ThreeVector p2, G4ThreeVector p3,
G4double& area) const;
// Returns a random point on the surface of one of the faces.
private:
G4double fDx,fDy,fDz;
G4double fTalpha,fTthetaCphi,fTthetaSphi;
};
#include "G4Para.icc"
#endif