library: libGeom #include "TGeoPara.h"

# TGeoPara

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

## class TGeoPara : public TGeoBBox

| Inheritance Chart:
`TObject`
| <- | `TNamed`
| <- | `TGeoShape`
| <- | `TGeoBBox`
| <- | `TGeoPara` |

        public:

                              TGeoPara()
                              TGeoPara(Double_t dx, Double_t dy, Double_t dz, Double_t alpha, Double_t theta, Double_t phi)
                              TGeoPara(const char* name, Double_t dx, Double_t dy, Double_t dz, Double_t alpha, Double_t theta, Double_t phi)
                              TGeoPara(Double_t* param)
                              TGeoPara(const TGeoPara&)
                      virtual ~TGeoPara()
               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 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)
                     Double_t GetAlpha() const
             virtual Double_t GetAxisRange(Int_t iaxis, Double_t& xlo, Double_t& xhi) const
                 virtual void GetBoundingCylinder(Double_t* param) const
                virtual Int_t GetByteCount() const
                virtual Int_t GetFittingBox(const TGeoBBox* parambox, TGeoMatrix* mat, Double_t& dx, Double_t& dy, Double_t& dz) const
           virtual TGeoShape* GetMakeRuntimeShape(TGeoShape* mother, TGeoMatrix* mat) const
                virtual Int_t GetNmeshVertices() const
                     Double_t GetPhi() const
                     Double_t GetTheta() const
                     Double_t GetTxy() const
                     Double_t GetTxz() const
                     Double_t GetTyz() const
                     Double_t GetX() const
                     Double_t GetY() const
                     Double_t GetZ() const
                 virtual void InspectShape() const
              virtual TClass* IsA() const
               virtual Bool_t IsCylType() const
                    TGeoPara& operator=(const TGeoPara&)
             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)
                 virtual void SetPoints(Double_t* points) const
                 virtual void SetPoints(Float_t* points) const
                 virtual void ShowMembers(TMemberInspector& insp, char* parent)
                 virtual void Sizeof3D() const
                 virtual void Streamer(TBuffer& b)
                         void StreamerNVirtual(TBuffer& b)

### Data Members

        protected:

          Double_t fX      X half-length
          Double_t fY      Y half-length
          Double_t fZ      Z half-length
          Double_t fAlpha  angle w.r.t Y from the center of low Y to the hihg Y
          Double_t fTheta  polar angle of segment between low and hi Z surfaces
          Double_t fPhi    azimuthal angle of segment between low and hi Z surfaces
          Double_t fTxy    tangent of XY section angle
          Double_t fTxz    tangent of XZ section angle
          Double_t fTyz    tangent of XZ section angle

## Class Description

     TGeoPara - parallelipeped class. It has 6 parameters :
             dx, dy, dz - half lengths in X, Y, Z
             alpha - angle w.r.t the Y axis from center of low Y edge to
                     center of high Y edge [deg]
             theta, phi - polar and azimuthal angles of the segment between
                     low and high Z surfaces [deg]

    _____________________________________________________________________________

/* */

/* */

/* */

/* */

TGeoPara()

     Default constructor

TGeoPara(Double_t dx, Double_t dy, Double_t dz, Double_t alpha, Double_t theta, Double_t phi) :TGeoBBox(0, 0, 0)

     Default constructor specifying minimum and maximum radius

TGeoPara(const char *name, Double_t dx, Double_t dy, Double_t dz, Double_t alpha, Double_t theta, Double_t phi) :TGeoBBox(name, 0, 0, 0)

     Default constructor specifying minimum and maximum radius

TGeoPara(Double_t *param) :TGeoBBox(0, 0, 0)

     Default constructor
     param[0] = dx
     param[1] = dy
     param[2] = dz
     param[3] = alpha
     param[4] = theta
     param[5] = phi

~TGeoPara()

     destructor

void ComputeBBox()

     compute bounding box

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 sphere
     test Z range

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 para
     Boundary safe algorithm.

Double_t DistFromOutside(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 para

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

    --- Divide this paralelipiped shape belonging to volume "voldiv" into ndiv equal volumes
     called divname, from start position with the given step. Returns pointer
     to created division cell volume. In case a wrong division axis is supplied,
     returns pointer to volume to be divided.

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

Int_t GetFittingBox(const TGeoBBox *parambox, TGeoMatrix *mat, Double_t &dx, Double_t &dy, Double_t &dz) const

     Fills real parameters of a positioned box inside this. Returns 0 if successfull.

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 SetDimensions(Double_t *param)

void SetPoints(Double_t *points) const

     create sphere mesh points

void SetPoints(Float_t *points) const

     create sphere mesh points

void Sizeof3D() const

     fill size of this 3-D object

### Inline Functions

                  Int_t GetByteCount() const
                  Int_t GetNmeshVertices() const
               Double_t GetX() const
               Double_t GetY() const
               Double_t GetZ() const
               Double_t GetAlpha() const
               Double_t GetTheta() const
               Double_t GetPhi() const
               Double_t GetTxy() const
               Double_t GetTxz() const
               Double_t GetTyz() const
                 Bool_t IsCylType() const
                TClass* Class()
                TClass* IsA() const
                   void ShowMembers(TMemberInspector& insp, char* parent)
                   void Streamer(TBuffer& b)
                   void StreamerNVirtual(TBuffer& b)
               TGeoPara TGeoPara(const TGeoPara&)
              TGeoPara& operator=(const TGeoPara&)

Author: Andrei Gheata 31/01/02
Last update: root/geom:$Name: $:$Id: TGeoPara.cxx,v 1.26 2005/05/13 16:20:38 brun Exp $
Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *