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// $Id: G4PolyhedraSide.hh 67011 2013-01-29 16:17:41Z gcosmo $
//
//
// --------------------------------------------------------------------
// GEANT 4 class header file
//
//
// G4PolyhedraSide
//
// Class description:
//
// Class implementing a face that represents one segmented side
// of a polyhedra:
//
// G4PolyhedraSide( const G4PolyhedraSideRZ *prevRZ,
// const G4PolyhedraSideRZ *tail,
// const G4PolyhedraSideRZ *head,
// const G4PolyhedraSideRZ *nextRZ,
// G4int numSide,
// G4double phiStart, G4double phiTotal,
// G4bool phiIsOpen, G4bool isAllBehind=false )
//
// Values for r1,z1 and r2,z2 should be specified in clockwise
// order in (r,z).
// Author:
// David C. Williams (davidw@scipp.ucsc.edu)
// --------------------------------------------------------------------
#ifndef G4PolyhedraSide_hh
#define G4PolyhedraSide_hh
#include "G4VCSGface.hh"
class G4IntersectingCone;
struct G4PolyhedraSideRZ
{
G4double r, z; // start of vector
};
class G4PolyhedraSide : public G4VCSGface
{
public: // with description
G4PolyhedraSide( const G4PolyhedraSideRZ *prevRZ,
const G4PolyhedraSideRZ *tail,
const G4PolyhedraSideRZ *head,
const G4PolyhedraSideRZ *nextRZ,
G4int numSide,
G4double phiStart, G4double phiTotal,
G4bool phiIsOpen, G4bool isAllBehind=false );
virtual ~G4PolyhedraSide();
G4PolyhedraSide( const G4PolyhedraSide &source );
G4PolyhedraSide& operator=( const G4PolyhedraSide &source );
G4bool Intersect( const G4ThreeVector &p, const G4ThreeVector &v,
G4bool outgoing, G4double surfTolerance,
G4double &distance, G4double &distFromSurface,
G4ThreeVector &normal, G4bool &allBehind );
G4double Distance( const G4ThreeVector &p, G4bool outgoing );
EInside Inside( const G4ThreeVector &p, G4double tolerance,
G4double *bestDistance );
G4ThreeVector Normal( const G4ThreeVector &p, G4double *bestDistance );
G4double Extent( const G4ThreeVector axis );
void CalculateExtent( const EAxis axis,
const G4VoxelLimits &voxelLimit,
const G4AffineTransform &tranform,
G4SolidExtentList &extentList );
G4VCSGface *Clone() { return new G4PolyhedraSide( *this ); }
public: // without description
// Methods used for GetPointOnSurface()
G4double SurfaceTriangle( G4ThreeVector p1,
G4ThreeVector p2,
G4ThreeVector p3,
G4ThreeVector *p4 );
G4ThreeVector GetPointOnPlane( G4ThreeVector p0, G4ThreeVector p1,
G4ThreeVector p2, G4ThreeVector p3,
G4double *Area );
G4double SurfaceArea();
G4ThreeVector GetPointOnFace();
public: // without description
G4PolyhedraSide(__void__&);
// Fake default constructor for usage restricted to direct object
// persistency for clients requiring preallocation of memory for
// persistifiable objects.
protected:
//
// A couple internal data structures
//
struct sG4PolyhedraSideVec; // Secret recipe for allowing
friend struct sG4PolyhedraSideVec; // protected nested structures
typedef struct sG4PolyhedraSideEdge
{
G4ThreeVector normal; // Unit normal to this edge
G4ThreeVector corner[2]; // The two corners of this phi edge
G4ThreeVector cornNorm[2]; // The normals of these corners
} G4PolyhedraSideEdge;
typedef struct sG4PolyhedraSideVec
{
G4ThreeVector normal, // Normal (point out of the shape)
center, // Point in center of side
surfPhi, // Unit vector on surface pointing along phi
surfRZ; // Unit vector on surface pointing along R/Z
G4PolyhedraSideEdge *edges[2]; // The phi boundary edges to this side
// [0]=low phi [1]=high phi
G4ThreeVector edgeNorm[2]; // RZ edge normals [i] at {r[i],z[i]}
} G4PolyhedraSideVec;
G4bool IntersectSidePlane( const G4ThreeVector &p, const G4ThreeVector &v,
const G4PolyhedraSideVec& vec,
G4double normSign,
G4double surfTolerance,
G4double &distance,
G4double &distFromSurface );
G4int LineHitsSegments( const G4ThreeVector &p,
const G4ThreeVector &v,
G4int *i1, G4int *i2 );
G4int ClosestPhiSegment( G4double phi );
G4int PhiSegment( G4double phi );
G4double GetPhi( const G4ThreeVector& p );
G4double DistanceToOneSide( const G4ThreeVector &p,
const G4PolyhedraSideVec &vec,
G4double *normDist );
G4double DistanceAway( const G4ThreeVector &p,
const G4PolyhedraSideVec &vec,
G4double *normDist );
void CopyStuff( const G4PolyhedraSide &source );
protected:
G4int numSide; // Number sides
G4double r[2], z[2]; // r, z parameters, in specified order
G4double startPhi, // Start phi (0 to 2pi), if phiIsOpen
deltaPhi, // Delta phi (0 to 2pi), if phiIsOpen
endPhi; // End phi (>startPhi), if phiIsOpen
G4bool phiIsOpen; // True if there is a phi slice
G4bool allBehind; // True if the entire solid is "behind" this face
G4IntersectingCone *cone; // Our intersecting cone
G4PolyhedraSideVec *vecs; // Vector set for each facet of our face
G4PolyhedraSideEdge *edges; // The edges belong to vecs
G4double lenRZ, // RZ length of each side
lenPhi[2]; // Phi dimensions of each side
G4double edgeNorm; // Normal in RZ/Phi space to each side
private:
std::pair<G4ThreeVector, G4double> fPhi; // Cached value for phi
G4double kCarTolerance; // Geometrical surface thickness
G4double fSurfaceArea; // Surface Area
};
#endif