[u/mrichter/AliRoot.git] / MUON / mapping / AliMpTransformer.h

// $Id$
// Category: basic
//
// Class AliMpTransformer
// ----------------------
// Class contains definition of transformation and
// provides functions for transforming pads.
//
// Transformation of pad characteristics according to sectors:
//
//   I.  ( posId,  Guassi ), ( i, j), ( x, y)         II. |  I.
//  II.  ( posId', Guassi'), (-i, j), (-x, y)       _____ | ____
// III.  (-posId,  Guassi),  (-i,-j), (-x,-y)             |
//  IV.  (-posId', Guassi'), ( i,-j), ( x,-y)        III. |  IV.
//   
// Where (posId', Guassi') is the location of the pad
// in the clipped sector.
//
// Authors: David Guez, Ivana Hrivnacova; IPN Orsay

#ifndef ALI_MP_TRANSFORMER_H
#define ALI_MP_TRANSFORMER_H

#include <TVector2.h>
#include <TObject.h>

#include "AliMpIntPair.h"
#include "AliMpArea.h"
#include "AliMpPad.h"

class AliMpTransformer : public TObject
{
  public:
    AliMpTransformer(const TVector2& offset, const AliMpIntPair& scale);
    AliMpTransformer();
    virtual ~AliMpTransformer();
  
    // public methods
    AliMpIntPair Scale(const AliMpIntPair& pair) const;
    TVector2     Scale(const TVector2& vector) const;
    AliMpIntPair ScaleLocation(const AliMpIntPair& orig) const;
    AliMpPad     Scale(const AliMpPad& pad) const;    
    TVector2 Transform(const TVector2& vector) const;
    TVector2 ITransform(const TVector2& vector) const; 
    AliMpPad Transform(const AliMpPad& pad) const; 
    AliMpPad ITransform(const AliMpPad& pad) const;
    AliMpArea    CutArea(const AliMpArea& area) const;
    
    // get methods
    TVector2 GetOffset() const;
    AliMpIntPair GetScale() const;
 
  private:
    // methods
    void CutInterval(Double_t x1, Double_t x2, Double_t x0, Double_t s,
                     Double_t& pos, Double_t& dx) const;
  
    // data members
    TVector2       fOffset;  // translation transformation
    AliMpIntPair   fScale;   // reflection transformation    

  ClassDef(AliMpTransformer,1)  // Transformer
};

// inline functions

inline TVector2 AliMpTransformer::GetOffset() const { return fOffset; }
inline AliMpIntPair AliMpTransformer::GetScale() const  { return fScale; }

#endif //ALI_MP_TRANSFORMER_H
Commit	Line	Data
5f91c9e8	1	// $Id$
	2	// Category: basic
	3	//
	4	// Class AliMpTransformer
	5	// ----------------------
	6	// Class contains definition of transformation and
	7	// provides functions for transforming pads.
	8	//
	9	// Transformation of pad characteristics according to sectors:
	10	//
	11	// I. ( posId, Guassi ), ( i, j), ( x, y) II. \| I.
	12	// II. ( posId', Guassi'), (-i, j), (-x, y) _____ \| ____
	13	// III. (-posId, Guassi), (-i,-j), (-x,-y) \|
	14	// IV. (-posId', Guassi'), ( i,-j), ( x,-y) III. \| IV.
	15	//
	16	// Where (posId', Guassi') is the location of the pad
	17	// in the clipped sector.
	18	//
	19	// Authors: David Guez, Ivana Hrivnacova; IPN Orsay
	20
	21	#ifndef ALI_MP_TRANSFORMER_H
	22	#define ALI_MP_TRANSFORMER_H
	23
	24	#include <TVector2.h>
	25	#include <TObject.h>
	26
	27	#include "AliMpIntPair.h"
	28	#include "AliMpArea.h"
	29	#include "AliMpPad.h"
	30
	31	class AliMpTransformer : public TObject
	32	{
	33	public:
	34	AliMpTransformer(const TVector2& offset, const AliMpIntPair& scale);
	35	AliMpTransformer();
	36	virtual ~AliMpTransformer();
	37
	38	// public methods
	39	AliMpIntPair Scale(const AliMpIntPair& pair) const;
	40	TVector2 Scale(const TVector2& vector) const;
	41	AliMpIntPair ScaleLocation(const AliMpIntPair& orig) const;
	42	AliMpPad Scale(const AliMpPad& pad) const;
	43	TVector2 Transform(const TVector2& vector) const;
	44	TVector2 ITransform(const TVector2& vector) const;
	45	AliMpPad Transform(const AliMpPad& pad) const;
	46	AliMpPad ITransform(const AliMpPad& pad) const;
	47	AliMpArea CutArea(const AliMpArea& area) const;
	48
	49	// get methods
	50	TVector2 GetOffset() const;
	51	AliMpIntPair GetScale() const;
	52
	53	private:
	54	// methods
	55	void CutInterval(Double_t x1, Double_t x2, Double_t x0, Double_t s,
	56	Double_t& pos, Double_t& dx) const;
	57
	58	// data members
	59	TVector2 fOffset; // translation transformation
	60	AliMpIntPair fScale; // reflection transformation
	61
	62	ClassDef(AliMpTransformer,1) // Transformer
	63	};
	64
65	// inline functions
66
67	inline TVector2 AliMpTransformer::GetOffset() const { return fOffset; }
68	inline AliMpIntPair AliMpTransformer::GetScale() const { return fScale; }
69
70	#endif //ALI_MP_TRANSFORMER_H
71