New version with the use of SetLayer for SSD. From M. Masera

[u/mrichter/AliRoot.git] / ITS / AliITSsegmentation.h

#ifndef ALIITSSEGMENTATION_H
#define ALIITSSEGMENTATION_H


#include <TObject.h>


class TF1;
class AliITSgeom;

//----------------------------------------------
//
// ITS  segmentation virtual base class
//
class AliITSsegmentation :
public TObject {
 public:

    virtual ~AliITSsegmentation() {}
    // Set Detector Segmentation Parameters
    //
    // Detector size  
    virtual void    SetDetSize(Float_t Dx, Float_t Dz, Float_t Dy) {}

    // Cell size   
    virtual void    SetPadSize(Float_t p1, Float_t p2) {}

    // Maximum number of cells along the two coordinates  
    virtual void    SetNPads(Int_t p1, Int_t p2) {}
    // Returns the maximum number of cells (digits) posible
    virtual Int_t   GetNPads(){return 0;}

    // Set angles - find a generic name fit for other detectors as well
    // might be useful for beam test setups (3 angles ?)
    virtual void    SetAngles(Float_t p1, Float_t p2) {}

    // Transform from real to cell coordinates
    virtual void    GetPadIxz(Float_t x ,Float_t z ,Int_t &ix,Int_t &iz) {}
    // Transform from cell to real coordinates
    virtual void    GetPadCxz(Int_t ix, Int_t iz, Float_t &x ,Float_t &z ) {}
    // Transform from real global to local coordinates
    virtual void    GetLocal(Int_t module,Float_t *g ,Float_t *l) {}
    // Transform from real local to global coordinates
    virtual void    GetGlobal(Int_t module,Float_t *l ,Float_t *g) {}
    // Local transformation of real local coordinates -
    virtual void    GetPadTxz(Float_t &x ,Float_t &z) {}
    // Transformation from Geant cm detector center local coordinates
    // to detector segmentation/cell coordiantes starting from (0,0).
    virtual void    LocalToDet(Float_t x,Float_t z,Int_t &ix,Int_t &iz){}
    // Transformation from detector segmentation/cell coordiantes starting
    // from (0,0) to Geant cm detector center local coordinates.
    virtual void    DetToLocal(Int_t ix,Int_t iz,Float_t &x,Float_t &z){}
    // Initialisation
    virtual void Init() {}
    //
    // Get member data
    //
    // Detector type geometry
    virtual AliITSgeom* Geometry() {return 0;}
    // Detector length
    virtual Float_t Dx() {return 0.;}
    // Detector width
    virtual Float_t Dz() {return 0.;}
    // Detector thickness
    virtual Float_t Dy() {return 0.;}
    // Cell size in x
    virtual Float_t Dpx(Int_t) {return 0.;}
    // Cell size in z 
    virtual Float_t Dpz(Int_t) {return 0.;}

    // Maximum number of Cells in x
    virtual Int_t    Npx() {return 0;}
    // Maximum number of Cells in z
    virtual Int_t    Npz() {return 0;}

    // Angles 
    virtual void Angles(Float_t &, Float_t&) {}

    // Set cell position
    virtual void     SetPad(Int_t, Int_t) {}
    // Set hit position
    virtual void     SetHit(Float_t, Float_t) {}
    
    //
    // Iterate over cells 
    // Initialiser
    virtual void  FirstPad
          (Float_t xhit, Float_t zhit, Float_t dx, Float_t dz) {}
    // Stepper
    virtual void  NextPad() {}
    // Condition
    virtual Int_t MorePads() {return 0;}
    //
    // Get next neighbours 
    virtual void Neighbours
      (Int_t iX, Int_t iZ, Int_t* Nlist, Int_t Xlist[10], Int_t Zlist[10]) {}
    //
    // Current cell cursor during disintegration
    // x-coordinate
    virtual Int_t  Ix() {return 0;}
    // z-coordinate
    virtual Int_t  Iz() {return 0;}
    //
    // Signal Generation Condition during Stepping
    virtual Int_t SigGenCond(Float_t x, Float_t y, Float_t z) {return 0;}
    // Initialise signal generation at coord (x,y,z)
    virtual void  SigGenInit(Float_t x, Float_t y, Float_t z) {}
    // Current integration limits 
    virtual void  IntegrationLimits
    (Float_t& x1, Float_t& x2, Float_t& z1, Float_t& z2) {}
    // Test points for auto calibration
    virtual void GiveTestPoints(Int_t &n, Float_t *x, Float_t *z) {}
    // Function for systematic corrections
    // Set the correction function
    virtual void SetCorrFunc(Int_t, TF1*) {}
    // Get the correction Function
    virtual TF1* CorrFunc(Int_t) {return 0;}
	    
    ClassDef(AliITSsegmentation,1) //Segmentation virtual base class 
};

#endif