Gabriele Cosmo
318 lines
11 KiB
C++
318 lines
11 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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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 *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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//
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// $Id: G4Trap.hh,v 1.5.4.1 2001/06/28 19:08:59 gunter Exp $
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// GEANT4 tag $Name: $
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//
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//
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// --------------------------------------------------------------------
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// GEANT 4 class header file
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//
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// G4Trap
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//
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// Class description:
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//
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// A G4Trap is a general trapezoid: The faces perpendicular to the
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// z planes are trapezia, and their centres are not necessarily on
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// a line parallel to the z axis.
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//
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// Note that of the 11 parameters described below, only 9 are really
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// independent - a check for planarity is made in the calculation of the
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// equation for each plane. If the planes are not parallel, a call to
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// G4Exception is made.
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//
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// pDz Half-length along the z-axis
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// pTheta Polar angle of the line joining the centres of the faces
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// at -/+pDz
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// pPhi Azimuthal angle of the line joing the centre of the face at
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// -pDz to the centre of the face at +pDz
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// pDy1 Half-length along y of the face at -pDz
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// pDx1 Half-length along x of the side at y=-pDy1 of the face at -pDz
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// pDx2 Half-length along x of the side at y=+pDy1 of the face at -pDz
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// pAlp1 Angle with respect to the y axis from the centre of the side
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// at y=-pDy1 to the centre at y=+pDy1 of the face at -pDz
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//
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// pDy2 Half-length along y of the face at +pDz
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// pDx3 Half-length along x of the side at y=-pDy2 of the face at +pDz
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// pDx4 Half-length along x of the side at y=+pDy2 of the face at +pDz
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// pAlp2 Angle with respect to the y axis from the centre of the side
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// at y=-pDy2 to the centre at y=+pDy2 of the face at +pDz
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//
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//
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// Member Data:
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//
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// fDz Half-length along the z axis
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// fTthetaCphi = tan(pTheta)*cos(pPhi) These combinations are suitable for
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// fTthetaSphi = tan(pTheta)*sin(pPhi) creation of the trapezoid corners
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//
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// fDy1 Half-length along y of the face at -fDz
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// fDx1 Half-length along x of the side at y=-fDy1 of the face at -fDz
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// fDx2 Half-length along x of the side at y=+fDy1 of the face at -fDz
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// fTalpha1 Tan of Angle with respect to the y axis from the centre of
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// the side at y=-fDy1 to the centre at y=+fDy1 of the face
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// at -fDz
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//
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// fDy2 Half-length along y of the face at +fDz
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// fDx3 Half-length along x of the side at y=-fDy2 of the face at +fDz
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// fDx4 Half-length along x of the side at y=+fDy2 of the face at +fDz
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// fTalpha2 Tan of Angle with respect to the y axis from the centre of
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// the side at y=-fDy1 to the centre at y=+fDy1 of the face at -fDz
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//
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// TrapSidePlane fPlanes[4] Plane equations of the faces not at +/-fDz
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// *** order is important !!!
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//
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//
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// Member functions:
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//
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// As inherited from G4CSGSolid + Constructors
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//
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// G4Trap( const G4String& pName,
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// G4double pDz,
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// G4double pTheta, G4double pPhi,
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// G4double pDy1, G4double pDx1, G4double pDx2,
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// G4double pAlp1,
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// G4double pDy2, G4double pDx3, G4double pDx4,
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// G4double pAlp2)
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//
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// - which prepare plane equations and corner coordinates from
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// parameters
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//
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// G4Trap( const G4string& pName,
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// const G4ThreeVector pt[8])
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//
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// - which prepare plane equations and parameters from corner
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// coordinates
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//
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// G4Trap( const G4String& pName,
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// G4double pZ,
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// G4double pY,
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// G4double pX, G4double pLTX);
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//
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// - for Right Angular Wedge from STEP
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//
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// & Constructor for G4Trd
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//
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// G4Trap( const G4String& pName,
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// G4double pDx1, G4double pDx2,
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// G4double pDy1, G4double pDy2,
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// G4double pDz);
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//
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// & Constructor for G4Para
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//
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// G4Trap(const G4String& pName,
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// G4double pDx, G4double pDy, G4double pDz,
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// G4double pAlpha, G4double pTheta, G4double pPhi);
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//
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// + Access functions that return the respective parameter
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//
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// G4double GetZHalfLength() const
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// G4ThreeVector GetSymAxis() const
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// - Returns coordinates of unit vector along straight
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// line joining centers of -/+fDz planes
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// G4double GetYHalfLength1() const
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// G4double GetXHalfLength1() const
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// G4double GetXHalfLength2() const
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// G4double GetTanAlpha1() const
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//
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// G4double GetYHalfLength2() const
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// G4double GetXHalfLength3() const
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// G4double GetXHalfLength4() const
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// G4double GetTanAlpha2() const
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//
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// TrapSidePlane GetSidePlane(G4int n ) const ; n = 0,1,2,3
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//
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// Protected:
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//
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// G4bool MakePlane( G4ThreeVector& p1,
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// G4ThreeVector& p2,
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// G4ThreeVector& p3,
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// G4ThreeVector& p4,
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// TrapSidePlane& plane )
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//
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//
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// G4ThreeVectorList*
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// CreateRotatedVertices(const G4Transform& 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 G4CSGSolid:: ClipCrossSection and ClipBetweenSections.
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// History:
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//
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// 23.3.94 P.Kent: Old C++ code converted to tolerant geometry
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// 9.9.96 V.Grichine: Final modifications before to commit
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// 1.11.96 V.Grichine Costructors for Right Angular Wedge from STEP & G4Trd/Para
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// 8.12.97 J.Allison Added "nominal" contructor and method SetAllParameters.
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// --------------------------------------------------------------------
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#ifndef G4Trap_HH
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#define G4Trap_HH
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#include "G4CSGSolid.hh"
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struct TrapSidePlane
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{
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G4double a,b,c,d; // Normal unit vector (a,b,c) and offset (d)
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// => Ax+By+Cz+D=0
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};
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class G4Trap : public G4CSGSolid
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{
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public:
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// The most general constructor for G4Trap
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G4Trap( const G4String& pName,
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G4double pDz,
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G4double pTheta, G4double pPhi,
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G4double pDy1, G4double pDx1, G4double pDx2,
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G4double pAlp1,
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G4double pDy2, G4double pDx3, G4double pDx4,
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G4double pAlp2);
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G4Trap( const G4String& pName,
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const G4ThreeVector pt[8]) ;
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// Constructor for Right Angular Wedge from STEP (assumes pLTX<=pX)
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G4Trap( const G4String& pName,
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G4double pZ,
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G4double pY,
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G4double pX, G4double pLTX);
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// Constructor for G4Trd
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G4Trap( const G4String& pName,
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G4double pDx1, G4double pDx2,
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G4double pDy1, G4double pDy2,
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G4double pDz);
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// Constructor for G4Para
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G4Trap(const G4String& pName,
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G4double pDx, G4double pDy, G4double pDz,
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G4double pAlpha, G4double pTheta, G4double pPhi);
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virtual ~G4Trap() ;
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// Constructor for "nominal" G4Trap whose parameters are to be set
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// by a G4VParamaterisation later.
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G4Trap(const G4String& pName);
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// Access functions
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G4double GetZHalfLength() const { return fDz ; }
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G4ThreeVector GetSymAxis() const
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{
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G4double cosTheta = 1.0/sqrt(1+fTthetaCphi*fTthetaCphi +
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fTthetaSphi*fTthetaSphi) ;
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return G4ThreeVector(fTthetaCphi*cosTheta,
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fTthetaSphi*cosTheta,
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cosTheta) ;
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}
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G4double GetYHalfLength1() const { return fDy1 ; }
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G4double GetXHalfLength1() const { return fDx1 ; }
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G4double GetXHalfLength2() const { return fDx2 ; }
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G4double GetTanAlpha1() const { return fTalpha1 ; }
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G4double GetYHalfLength2() const { return fDy2 ; }
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G4double GetXHalfLength3() const { return fDx3 ; }
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G4double GetXHalfLength4() const { return fDx4 ; }
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G4double GetTanAlpha2() const { return fTalpha2 ; }
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TrapSidePlane GetSidePlane(G4int n ) const { return fPlanes[n] ; }
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// Set Methods
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void SetAllParameters ( G4double pDz,
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G4double pTheta,
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G4double pPhi,
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G4double pDy1,
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G4double pDx1,
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G4double pDx2,
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G4double pAlp1,
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G4double pDy2,
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G4double pDx3,
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G4double pDx4,
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G4double pAlp2);
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// Methods
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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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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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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=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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G4GeometryType GetEntityType() const { return G4String("G4Trap"); }
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// Naming method (pseudo-RTTI : run-time type identification
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// Visualisation functions
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void DescribeYourselfTo (G4VGraphicsScene& scene) const;
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G4Polyhedron* CreatePolyhedron () const;
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G4NURBS* CreateNURBS () const;
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protected:
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G4bool MakePlanes();
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G4bool MakePlane( const G4ThreeVector& p1,
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const G4ThreeVector& p2,
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const G4ThreeVector& p3,
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const G4ThreeVector& p4,
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TrapSidePlane& plane ) ;
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G4ThreeVectorList*
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CreateRotatedVertices(const G4AffineTransform& pTransform) const;
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private:
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G4double fDz,fTthetaCphi,fTthetaSphi;
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G4double fDy1,fDx1,fDx2,fTalpha1;
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G4double fDy2,fDx3,fDx4,fTalpha2;
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TrapSidePlane fPlanes[4];
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};
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#endif
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// **************************** End of G4Trap.hh *****************************************
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