#ifndef ALIITSV11GEOMETRYSPD_H
#define ALIITSV11GEOMETRYSPD_H

/* 
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved.
 * See cxx source for full Copyright notice.
 */

/*
 * Implementation of the SPD v11 central geometry.
 * Contains also:
 *  - the materials/media used for its volumes;
 *  - settings for the related transport parameters (GEANT3 types for the moment).
 */

/*
 * $Id$
 */

#include <TGeoManager.h>
#include <TVirtualMC.h>
#include <AliITSv11Geometry.h>

class TGeoVolume;

class AliITSv11GeometrySPD : public AliITSv11Geometry
{
public:
	AliITSv11GeometrySPD() : AliITSv11Geometry() {};
	AliITSv11GeometrySPD(Int_t debug) : AliITSv11Geometry(debug) {}; // set explicitly debug level
	virtual ~AliITSv11GeometrySPD() {};
	
	/* Settings */
	
	// define/create materials
	virtual Int_t CreateSPDCenteralMaterials(Int_t &medOffset, Int_t &matOffset);
	// set SPD Centeral, GEANT3 type, tracking parameters
	virtual void InitSPDCenteral(Int_t offset,TVirtualMC *mc=gMC);
	
	/* Monitoring */
	
	// creates standard figures for the documentation of this class
	virtual void CreateFigure0(const Char_t *filepath = "", const Char_t *type = "gif", TGeoManager *mgr=gGeoManager);
	
	/* Member functions which create pieces of the geometry */
	
	// a single ladder (= 1 detector + 5 chips)
	TGeoVolume* CreateLadder(Int_t layer, Double_t &width, Double_t &height, Double_t &thickness, TGeoManager *mgr = gGeoManager);
	// the grounding foil (splitted in two components)
	TGeoVolume* CreateGroundingFoilSingle(Bool_t kapLayer, Double_t &len, Double_t &wid, Double_t &thick, TGeoManager *mgr = gGeoManager);
	TGeoVolume* CreateGroundingFoil(Double_t &thickness, TGeoManager *mgr = gGeoManager);
	// the MCM (incomplete: missing the internal chips)
	TGeoVolume* CreateMCMBase(TGeoManager *mgr = gGeoManager);
	TGeoVolume* CreateMCMCoverBorder(TGeoManager *mgr = gGeoManager);
	TGeoVolume* CreateMCMCoverTop(TGeoManager *mgr = gGeoManager);
	// the Pixel Bus & extenders
	TGeoVolumeAssembly* CreatePixelBusAndExtensions(Bool_t zpos = kTRUE, TGeoManager *mgr = gGeoManager);
	// the thin part of a stave (grounding + ladders)
	TGeoVolume *CreateStaveBase(Int_t layer, Double_t &width, Double_t &height, Double_t &thickness, TGeoManager *mgr=gGeoManager);
	// the whole stave, including the thick parts (MCM cover, pixel bus & extensions)
	TGeoVolumeAssembly* CreateStave(Int_t layer, Double_t &thickness, TGeoManager *mgr);
	// displacement of staves on the carbon fiber sector
	virtual void StavesInSector(TGeoVolume *moth, TGeoManager *mgr=gGeoManager);
	// the complete Carbon Fiber sector (support + staves)
	virtual void CarbonFiberSector(TGeoVolume *moth, Double_t &xAAtubeCenter0, Double_t &yAAtubeCenter0, TGeoManager *mgr=gGeoManager);
	// the whole SPD barrel
	virtual void SPDSector(TGeoVolume *moth, TGeoManager *mgr=gGeoManager);

private:
	
	// NOTE:
	// all of the member functions which define a component of the final SPD
	// will need to be defined as private once the design is fixed and does not
	// need any longer to be checked and debugged.
	
	// Computes shape of the SPD Sector given specific inputs (internal use only)
	void SPDsectorShape(Int_t n, const Double_t *xc, const Double_t *yc, const Double_t *r,
	                    const Double_t *ths, const Double_t *the, Int_t npr,
	                    Int_t &m, Double_t **xp, Double_t **yp);
	
	// computes a point o a line parallel to a given direction
	// and with a fixed distance from it (internal use only)
	void ParallelPosition(Double_t dist1, Double_t dist2, Double_t phi, Double_t &x, Double_t &y);
	
	ClassDef(AliITSv11GeometrySPD,1) // ITS v11 Centeral SPD geometry
};

#endif