library: libGeom #include "TGeoEltu.h"

# TGeoEltu

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

## class TGeoEltu : public TGeoTube

| Inheritance Chart:
`TObject`
| <- | `TNamed`
| <- | `TGeoShape`
| <- | `TGeoBBox`
| <- | `TGeoTube`
| <- | `TGeoEltu` |

        public:

                                   TGeoEltu()
                                   TGeoEltu(Double_t a, Double_t b, Double_t dz)
                                   TGeoEltu(const char* name, Double_t a, Double_t b, Double_t dz)
                                   TGeoEltu(Double_t* params)
                                   TGeoEltu(const TGeoEltu&)
                           virtual ~TGeoEltu()
                    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 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
               virtual TGeoVolume* Divide(TGeoVolume* voldiv, const char* divname, Int_t iaxis, Int_t ndiv, Double_t start, Double_t step)
                  virtual Double_t GetA() const
                  virtual Double_t GetB() const
                      virtual void GetBoundingCylinder(Double_t* param) const
          virtual const TBuffer3D& GetBuffer3D(Int_t reqSections, Bool_t localFrame) const
                virtual TGeoShape* GetMakeRuntimeShape(TGeoShape* mother, TGeoMatrix* mat) const
                     virtual Int_t GetNmeshVertices() const
                      virtual void InspectShape() const
                   virtual TClass* IsA() const
                    virtual Bool_t IsCylType() const
                         TGeoEltu& operator=(const TGeoEltu&)
                  virtual Double_t Safety(Double_t* point, Bool_t in = kTRUE) const
                      virtual void SavePrimitive(ofstream& out, Option_t* option)
                      virtual void SetDimensions(Double_t* param)
                              void SetEltuDimensions(Double_t a, Double_t b, Double_t dz)
                      virtual void SetPoints(Double_t* points) const
                      virtual void SetPoints(Float_t* points) const
                      virtual void ShowMembers(TMemberInspector& insp, char* parent)
                      virtual void Streamer(TBuffer& b)
                              void StreamerNVirtual(TBuffer& b)

### Data Members

## Class Description

     TGeoEltu - elliptical tube class. It takes 3 parameters :
     semi-axis of the ellipse along x, semi-asix of the ellipse along y
     and half-length dz.

    _____________________________________________________________________________

/* */

TGeoEltu()

     Dummy constructor

TGeoEltu(Double_t a, Double_t b, Double_t dz) :TGeoTube()

     Default constructor specifying X and Y semiaxis length

TGeoEltu(const char *name, Double_t a, Double_t b, Double_t dz) :TGeoTube()

     Default constructor specifying X and Y semiaxis length

TGeoEltu(Double_t *param)

     Default constructor specifying minimum and maximum radius
     param[0] =  A
     param[1] =  B
     param[2] = dz

~TGeoEltu()

     destructor

void ComputeBBox()

     compute bounding box of the tube

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 the elliptical tube

Int_t DistancetoPrimitive(Int_t px, Int_t py)

     compute closest distance from point px,py to each vertex

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 tube

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 and safe distance

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

void GetBoundingCylinder(Double_t *param) const

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

TGeoShape* GetMakeRuntimeShape(TGeoShape *mother, TGeoMatrix * /*mat*/) const

     in case shape has some negative parameters, these has to be computed
     in order to fit the mother

void InspectShape() const

     print shape parameters

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

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

void SetEltuDimensions(Double_t a, Double_t b, Double_t dz)

void SetDimensions(Double_t *param)

void SetPoints(Double_t *points) const

     create tube mesh points

Int_t GetNmeshVertices() const

void SetPoints(Float_t *points) const

     create tube mesh points

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

### Inline Functions

               Double_t GetA() const
               Double_t GetB() const
                 Bool_t IsCylType() const
                TClass* Class()
                TClass* IsA() const
                   void ShowMembers(TMemberInspector& insp, char* parent)
                   void Streamer(TBuffer& b)
                   void StreamerNVirtual(TBuffer& b)
               TGeoEltu TGeoEltu(const TGeoEltu&)
              TGeoEltu& operator=(const TGeoEltu&)

Author: Mihaela Gheata 05/06/02
Last update: root/geom:$Name: $:$Id: TGeoEltu.cxx,v 1.25 2005/05/13 16:20:38 brun Exp $
Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *