library: libGeom
#include "TGeoPgon.h"

TGeoPgon


class description - source file - inheritance tree (.ps)

class TGeoPgon : public TGeoPcon

Inheritance Chart:
TObject
<-
TNamed
<-
TGeoShape
<-
TGeoBBox
<-
TGeoPcon
<-
TGeoPgon

    protected:
Int_t GetPhiCrossList(Double_t* point, Double_t* dir, Int_t istart, Double_t* sphi, Int_t* iphi, Double_t stepmax = TGeoShape::Big()) const Bool_t IsCrossingSlice(Double_t* point, Double_t* dir, Int_t iphi, Double_t sstart, Int_t& ipl, Double_t& snext, Double_t stepmax) const void LocatePhi(Double_t* point, Int_t& ipsec) const Double_t Rpg(Double_t z, Int_t ipl, Bool_t inner, Double_t& a, Double_t& b) const Double_t Rproj(Double_t z, Double_t* point, Double_t* dir, Double_t cphi, Double_t sphi, Double_t& a, Double_t& b) const Bool_t SliceCrossing(Double_t* point, Double_t* dir, Int_t nphi, Int_t* iphi, Double_t* sphi, Double_t& snext, Double_t stepmax) const Bool_t SliceCrossingIn(Double_t* point, Double_t* dir, Int_t nphi, Int_t* iphi, Double_t* sphi, Double_t& snext, Double_t stepmax) const Bool_t SliceCrossingInZ(Double_t* point, Double_t* dir, Int_t nphi, Int_t* iphi, Double_t* sphi, Double_t& snext, Double_t stepmax) const Bool_t SliceCrossingZ(Double_t* point, Double_t* dir, Int_t nphi, Int_t* iphi, Double_t* sphi, Double_t& snext, Double_t stepmax) const public:
TGeoPgon() TGeoPgon(Double_t phi, Double_t dphi, Int_t nedges, Int_t nz) TGeoPgon(const char* name, Double_t phi, Double_t dphi, Int_t nedges, Int_t nz) TGeoPgon(Double_t* params) TGeoPgon(const TGeoPgon&) virtual ~TGeoPgon() static TClass* Class() virtual void ComputeBBox() virtual void ComputeNormal(Double_t* point, Double_t* dir, Double_t* norm) virtual Bool_t Contains(Double_t* point) const virtual void DefineSection(Int_t snum, Double_t z, Double_t rmin, Double_t rmax) virtual Int_t DistancetoPrimitive(Int_t px, Int_t py) virtual Double_t DistToIn(Double_t* point, Double_t* dir, Int_t iact = 1, Double_t step = TGeoShape::Big(), Double_t* safe = 0) const virtual Double_t DistToOut(Double_t* point, Double_t* dir, Int_t iact = 1, Double_t step = TGeoShape::Big(), Double_t* safe = 0) const virtual TGeoVolume* Divide(TGeoVolume* voldiv, const char* divname, Int_t iaxis, Int_t ndiv, Double_t start, Double_t step) virtual void GetBoundingCylinder(Double_t* param) const virtual Int_t GetByteCount() const virtual TGeoShape* GetMakeRuntimeShape(TGeoShape*, TGeoMatrix*) const Int_t GetNedges() const virtual Int_t GetNmeshVertices() const virtual Int_t GetNsegments() const virtual void InspectShape() const virtual TClass* IsA() const TGeoPgon& operator=(const TGeoPgon&) virtual void Paint(Option_t* option) virtual Double_t Safety(Double_t* point, Bool_t in = kTRUE) const Double_t SafetyToSegment(Double_t* point, Int_t ipl, Int_t iphi, Bool_t in, Double_t safphi, Double_t safmin = TGeoShape::Big()) const virtual void SetDimensions(Double_t* param) virtual void SetPoints(Double_t* buff) const virtual void SetPoints(Float_t* buff) const virtual void ShowMembers(TMemberInspector& insp, char* parent) virtual void Sizeof3D() const virtual void Streamer(TBuffer& b) void StreamerNVirtual(TBuffer& b)

Data Members


    protected:
Int_t fNedges number of edges (at least one)

Class Description

 TGeoPgon - a polygone. It has at least 10 parameters :
            - the lower phi limit;
            - the range in phi;
            - the number of edges on each z plane;
            - the number of z planes (at least two) where the inner/outer
              radii are changing;
            - z coordinate, inner and outer radius for each z plane

_____________________________________________________________________________
/* */


/*

*/


TGeoPgon()
 dummy ctor

TGeoPgon(Double_t phi, Double_t dphi, Int_t nedges, Int_t nz) :TGeoPcon(phi, dphi, nz)
 Default constructor

TGeoPgon(const char *name, Double_t phi, Double_t dphi, Int_t nedges, Int_t nz) :TGeoPcon(name, phi, dphi, nz)
 Default constructor

TGeoPgon(Double_t *param) :TGeoPcon()
 Default constructor in GEANT3 style
 param[0] = phi1
 param[1] = dphi
 param[2] = nedges
 param[3] = nz

 param[4] = z1
 param[5] = Rmin1
 param[6] = Rmax1
 ...

~TGeoPgon()
 destructor

void ComputeBBox()
 compute bounding box for a polygone

void ComputeNormal(Double_t *point, Double_t *dir, Double_t *norm)
 Compute normal to closest surface from POINT.

Bool_t Contains(Double_t *point) const
 test if point is inside this shape
 check total z range

void DefineSection(Int_t snum, Double_t z, Double_t rmin, Double_t rmax)
 defines z position of a section plane, rmin and rmax at this z.

Double_t DistToOut(Double_t *point, Double_t *dir, Int_t iact, Double_t step, Double_t *safe) const
 compute distance from inside point to surface of the polygone
 first find out in which Z section the point is in

void LocatePhi(Double_t *point, Int_t &ipsec) const

Int_t GetPhiCrossList(Double_t *point, Double_t *dir, Int_t istart, Double_t *sphi, Int_t *iphi, Double_t stepmax) const
printf("   PHI crossing list:\n");

Bool_t SliceCrossingInZ(Double_t *point, Double_t *dir, Int_t nphi, Int_t *iphi, Double_t *stepphi, Double_t &snext, Double_t stepmax) const

Bool_t SliceCrossingZ(Double_t *point, Double_t *dir, Int_t nphi, Int_t *iphi, Double_t *stepphi, Double_t &snext, Double_t stepmax) const

Bool_t SliceCrossingIn(Double_t *point, Double_t *dir, Int_t nphi, Int_t *iphi, Double_t *stepphi, Double_t &snext, Double_t stepmax) const
 Check boundary crossing inside phi slices. Return distance snext to first crossing
 if smaller than stepmax.
   printf("   SliceCrossingIn. stepmax = %f\n", stepmax);

Bool_t SliceCrossing(Double_t *point, Double_t *dir, Int_t nphi, Int_t *iphi, Double_t *stepphi, Double_t &snext, Double_t stepmax) const
 Check boundary crossing inside phi slices. Return distance snext to first crossing
 if smaller than stepmax.

Bool_t IsCrossingSlice(Double_t *point, Double_t *dir, Int_t iphi, Double_t sstart, Int_t &ipl, Double_t &snext, Double_t stepmax) const
 Check crossing of a given pgon slice, from a starting point inside the slice

Double_t DistToIn(Double_t *point, Double_t *dir, Int_t iact, Double_t step, Double_t *safe) const
 compute distance from outside point to surface of the polygone

Int_t DistancetoPrimitive(Int_t px, Int_t py)
 compute closest distance from point px,py to each corner

TGeoVolume* Divide(TGeoVolume *voldiv, const char *divname, Int_t iaxis, Int_t ndiv, Double_t start, Double_t step)
--- Divide this polygone shape belonging to volume "voldiv" into ndiv volumes
 called divname, from start position with the given step. Returns pointer
 to created division cell volume in case of Z divisions. Phi divisions are
 allowed only if nedges%ndiv=0 and create polygone "segments" with nedges/ndiv edges.
 Z divisions can be performed if the divided range is in between two consecutive Z planes.
 In case a wrong division axis is supplied, returns pointer to volume that was divided.

void GetBoundingCylinder(Double_t *param) const
--- Fill vector param[4] with the bounding cylinder parameters. The order
 is the following : Rmin, Rmax, Phi1, Phi2

void InspectShape() const

void Paint(Option_t *option)
 paint this shape according to option

Double_t Rpg(Double_t z, Int_t ipl, Bool_t inner, Double_t &a, Double_t &b) const
 Computes projected pgon radius (inner or outer) corresponding to a given Z
 value. Fills corresponding coefficients of:
   Rpg(z) = a + b*z
 Note: ipl must be in range [0,fNz-2]

Double_t Rproj(Double_t z, Double_t *point, Double_t *dir, Double_t cphi, Double_t sphi, Double_t &a, Double_t &b) const
 Computes projected distance at a given Z for a given ray inside a given sector
 and fills coefficients:
   Rproj = a + b*z

Double_t SafetyToSegment(Double_t *point, Int_t ipl, Int_t iphi, Bool_t in, Double_t safphi, Double_t safmin) const
 Compute safety from POINT to segment between planes ipl, ipl+1 within safmin.

Double_t Safety(Double_t *point, Bool_t in) const
 computes the closest distance from given point to this shape, according
 to option. The matching point on the shape is stored in spoint.

void SetDimensions(Double_t *param)

void SetPoints(Double_t *buff) const
 create polygone mesh points

void SetPoints(Float_t *buff) const
 create polygone mesh points

Int_t GetNmeshVertices() const
 Return number of vertices of the mesh representation

void Sizeof3D() const
 fill size of this 3-D object



Inline Functions


              Int_t GetByteCount() const
         TGeoShape* GetMakeRuntimeShape(TGeoShape*, TGeoMatrix*) const
              Int_t GetNedges() const
              Int_t GetNsegments() const
            TClass* Class()
            TClass* IsA() const
               void ShowMembers(TMemberInspector& insp, char* parent)
               void Streamer(TBuffer& b)
               void StreamerNVirtual(TBuffer& b)
           TGeoPgon TGeoPgon(const TGeoPgon&)
          TGeoPgon& operator=(const TGeoPgon&)


Author: Andrei Gheata 31/01/02
Last update: root/geom:$Name: $:$Id: TGeoPgon.cxx,v 1.37 2004/06/25 11:59:55 brun Exp $
Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *


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