library: libGeom #include "TGeoPcon.h"

# TGeoPcon

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

## class TGeoPcon : public TGeoBBox

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

        public:

                                   TGeoPcon()
                                   TGeoPcon(Double_t phi, Double_t dphi, Int_t nz)
                                   TGeoPcon(const char* name, Double_t phi, Double_t dphi, Int_t nz)
                                   TGeoPcon(Double_t* params)
                                   TGeoPcon(const TGeoPcon&)
                           virtual ~TGeoPcon()
                    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 DistFromInside(Double_t* point, Double_t* dir, Int_t iact = 1, Double_t step = TGeoShape::Big(), Double_t* safe = 0) const
                  virtual Double_t DistFromOutside(Double_t* point, Double_t* dir, Int_t iact = 1, Double_t step = TGeoShape::Big(), Double_t* safe = 0) const
                          Double_t DistToSegZ(Double_t* point, Double_t* dir, Int_t& iz, Double_t c1, Double_t s1, Double_t c2, Double_t s2, Double_t cfio, Double_t sfio, Double_t cdfi) const
               virtual TGeoVolume* Divide(TGeoVolume* voldiv, const char* divname, Int_t iaxis, Int_t ndiv, Double_t start, Double_t step)
                         Double_t& Dphi()
               virtual const char* GetAxisName(Int_t iaxis) const
                  virtual Double_t GetAxisRange(Int_t iaxis, Double_t& xlo, Double_t& xhi) const
                      virtual void GetBoundingCylinder(Double_t* param) const
          virtual const TBuffer3D& GetBuffer3D(Int_t reqSections, Bool_t localFrame) const
                     virtual Int_t GetByteCount() const
                          Double_t GetDphi() const
                virtual TGeoShape* GetMakeRuntimeShape(TGeoShape*, TGeoMatrix*) const
                     virtual Int_t GetNmeshVertices() const
                     virtual Int_t GetNsegments() const
                             Int_t GetNz() const
                          Double_t GetPhi1() const
                         Double_t* GetRmax() const
                          Double_t GetRmax(Int_t ipl) const
                         Double_t* GetRmin() const
                          Double_t GetRmin(Int_t ipl) const
                         Double_t* GetZ() const
                          Double_t GetZ(Int_t ipl) const
                      virtual void InspectShape() const
                   virtual TClass* IsA() const
                    virtual Bool_t IsCylType() const
                virtual TBuffer3D* MakeBuffer3D() const
                         TGeoPcon& operator=(const TGeoPcon&)
                         Double_t& Phi1()
                         Double_t& Rmax(Int_t ipl)
                         Double_t& Rmin(Int_t ipl)
                  virtual Double_t Safety(Double_t* point, Bool_t in = kTRUE) const
                          Double_t SafetyToSegment(Double_t* point, Int_t ipl, Bool_t in = kTRUE, Double_t safmin = TGeoShape::Big()) const
                      virtual void SavePrimitive(ofstream& out, Option_t* option)
                      virtual void SetDimensions(Double_t* param)
                      virtual void SetPoints(Double_t* points) const
                      virtual void SetPoints(Float_t* points) const
                      virtual void SetSegsAndPols(TBuffer3D& buff) const
                      virtual void ShowMembers(TMemberInspector& insp, char* parent)
                      virtual void Sizeof3D() const
                      virtual void Streamer(TBuffer& b)
                              void StreamerNVirtual(TBuffer& b)
                         Double_t& Z(Int_t ipl)

### Data Members

        protected:

              Int_t fNz    number of z planes (at least two)
           Double_t fPhi1  lower phi limit
           Double_t fDphi  phi range
          Double_t* fRmin  [fNz] pointer to array of inner radii
          Double_t* fRmax  [fNz] pointer to array of outer radii
          Double_t* fZ     [fNz] pointer to array of Z planes positions

## Class Description

     TGeoPcon - a polycone. It has at least 9 parameters :
                - the lower phi limit;
                - the range in phi;
                - 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

    _____________________________________________________________________________

/* */

TGeoPcon() :TGeoBBox(0, 0, 0)

     dummy ctor

TGeoPcon(Double_t phi, Double_t dphi, Int_t nz) :TGeoBBox(0, 0, 0)

     Default constructor

TGeoPcon(const char *name, Double_t phi, Double_t dphi, Int_t nz) :TGeoBBox(name, 0, 0, 0)

     Default constructor

TGeoPcon(Double_t *param) :TGeoBBox(0, 0, 0), fRmin(0), fRmax(0), fZ(0)

     Default constructor in GEANT3 style
     param[0] = phi1
     param[1] = dphi
     param[2] = nz

     param[3] = z1
     param[4] = Rmin1
     param[5] = Rmax1
     ...

~TGeoPcon()

     destructor

void ComputeBBox()

     compute bounding box of the pcon

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

Int_t DistancetoPrimitive(Int_t px, Int_t py)

     compute closest distance from point px,py to each corner

Double_t DistFromInside(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 polycone

Double_t DistToSegZ(Double_t *point, Double_t *dir, Int_t &iz, Double_t c1, Double_t s1, Double_t c2, Double_t s2, Double_t cfio, Double_t sfio, Double_t cdfi) const

     compute distance to a pcon Z slice. Segment iz must be valid

Double_t DistFromOutside(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 tube

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.

Int_t GetNsegments() const

TGeoVolume* Divide(TGeoVolume *voldiv, const char *divname, Int_t iaxis, Int_t ndiv, Double_t start, Double_t step)

    --- Divide this polycone 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. 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.

const char* GetAxisName(Int_t iaxis) const

     Returns name of axis IAXIS.

Double_t GetAxisRange(Int_t iaxis, Double_t &xlo, Double_t &xhi) const

     Get range of shape for a given axis.

void GetBoundingCylinder(Double_t *param) const

    --- Fill vector param[4] with the bounding cylinder parameters. The order
     is the following : Rmin, Rmax, Phi1, Phi2

Double_t GetRmin(Int_t ipl) const

Double_t GetRmax(Int_t ipl) const

Double_t GetZ(Int_t ipl) const

void InspectShape() const

     print shape parameters

TBuffer3D* MakeBuffer3D() const

     Creates a TBuffer3D describing *this* shape.
     Coordinates are in local reference frame.

void SetSegsAndPols(TBuffer3D &buff) const

     Fill TBuffer3D structure for segments and polygons.

Double_t SafetyToSegment(Double_t *point, Int_t ipl, Bool_t in, 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.
    ---> localize the Z segment

void SavePrimitive(ofstream &out, Option_t * /*option*/)

     Save a primitive as a C++ statement(s) on output stream "out".

void SetDimensions(Double_t *param)

void SetPoints(Double_t *points) const

     create polycone mesh points

void SetPoints(Float_t *points) const

     create polycone mesh points

Int_t GetNmeshVertices() const

     Return number of vertices of the mesh representation

void Sizeof3D() const

    /// fill size of this 3-D object
    /   TVirtualGeoPainter *painter = gGeoManager->GetGeomer();
    /   if (!painter) return;
    /    Int_t n;

    /    n = gGeoManager->GetNsegments()+1;

    /    Int_t numPoints = fNz*2*n;
    /    Int_t numSegs   = 4*(fNz*n-1+(fDphi == 360));
    /    Int_t numPolys  = 2*(fNz*n-1+(fDphi == 360));
    /    painter->AddSize3D(numPoints, numSegs, numPolys);

const TBuffer3D& GetBuffer3D(Int_t reqSections, Bool_t localFrame) const

### Inline Functions

                  Int_t GetByteCount() const
               Double_t GetPhi1() const
               Double_t GetDphi() const
                  Int_t GetNz() const
               Double_t GetRmin(Int_t ipl) const
               Double_t GetRmax(Int_t ipl) const
               Double_t GetZ(Int_t ipl) const
             TGeoShape* GetMakeRuntimeShape(TGeoShape*, TGeoMatrix*) const
                 Bool_t IsCylType() const
              Double_t& Phi1()
              Double_t& Dphi()
              Double_t& Rmin(Int_t ipl)
              Double_t& Rmax(Int_t ipl)
              Double_t& Z(Int_t ipl)
                TClass* Class()
                TClass* IsA() const
                   void ShowMembers(TMemberInspector& insp, char* parent)
                   void Streamer(TBuffer& b)
                   void StreamerNVirtual(TBuffer& b)
               TGeoPcon TGeoPcon(const TGeoPcon&)
              TGeoPcon& operator=(const TGeoPcon&)

Author: Andrei Gheata 24/10/01
Last update: root/geom:$Name: $:$Id: TGeoPcon.cxx,v 1.47 2005/05/30 16:55:30 brun Exp $
Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *