class HDetGeomPar: public HParSet

_HADES_CLASS_DESCRIPTION

 HGeomDetPar

 Container class for the basic geometry parameters of a detector

 This container can hold the information about the sizes and positions of
 volumes forming a geometry tree with 2 levels: modules and components in
 these modules.

 The information is stored in 2 arrays.
 The array "modules" is a linear array of maxSectors*maxModules pointers to
 detector modules (type HModGeomPar) each having a name and a lab
 transformation which describes the position and orientation of the internal
 module coordinate system relative to the cave coordinate system.
 Each module has a pointer to a reference module describing the type of this
 module. These module types (objects of class HGeomCompositeVolume) are
 stored in the second array "refVolumes". (Normally the modules in the six
 sectors are identical and the information has to be stored only once. Only
 their position is different.)
 Each reference module is a volume with a detector dependent number of
 components which are volumes themselves. Each volume has a name, a shape, a
 mother, a shape dependant number of points describing the size and a
 transformation. The transformation of a module describes the detector
 coordinate system (ideal position in a sector) and the transformation of a
 component shows the position and orientation relative to  this detector
 coordinate system.

 inline functions of class HDetGeomPar:

   Int_t getNumComponents()
       returns the number of components in a module
   Int_t getMaxSectors()
       returns the maximum number of sectors
   Int_t getMaxModules()
       returns the maximum number of modules
   HGeomShapes* getShapes()
       return the pointer to the shape classes

 virtual functions of class HDetGeomPar which have to be implemented by the
 detector classes:
   virtual Bool_t init(HParIo*,Int_t*)
       initilizes the container from an input
   virtual Int_t write(HParIo*)
       writes the container to an output
   virtual Int_t getSecNum(const TString&)
       retrieves the sector number from the name of a module
   virtual Int_t getModNumInMod(const TString&) {return -1;}
       retrieves the module number from the name of a module
   virtual Int_t getModNumInComp(const TString&) {return -1;}
       retrieves the module number from the name of a component
   virtual Int_t getCompNum(const TString&) {return -1;}
       retrieves the component number from the name of a component

 inline functions of class HModGeomPar:

   void setVolume(HGeomCompositeVolume* p)
       sets the pointer to the reference volume
   HGeomCompositeVolume* getRefVolume()
       returns a pointer to the reference volume
   HGeomTransform& getLabTransform()
       returns the lab transformation of a module
   const Text_t* getRefName() const
       sets the name of the reference volume