library: libGeom
#include "TGeoXtru.h"

TGeoXtru


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

class TGeoXtru : public TGeoBBox

Inheritance Chart:
TObject
<-
TNamed
<-
TGeoShape
<-
TGeoBBox
<-
TGeoXtru

    protected:
Double_t DistToPlane(Double_t* point, Double_t* dir, Int_t iz, Int_t ivert, Double_t stepmax, Bool_t in) const void GetPlaneNormal(const Double_t* vert, Double_t* norm) const void GetPlaneVertices(Int_t iz, Int_t ivert, Double_t* vert) const Bool_t IsPointInsidePlane(Double_t* point, Double_t* vert, Double_t* norm) const Double_t SafetyToSector(Double_t* point, Int_t iz, Double_t safmin) void SetIz(Int_t iz) void SetSeg(Int_t iseg) public:
TGeoXtru() TGeoXtru(Int_t nz) TGeoXtru(Double_t* param) TGeoXtru(const TGeoXtru&) virtual ~TGeoXtru() 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 Bool_t DefinePolygon(Int_t nvert, const Double_t* xv, const Double_t* yv) virtual void DefineSection(Int_t snum, Double_t z, Double_t x0 = 0., Double_t y0 = 0., Double_t scale = 1.) virtual Int_t DistancetoPrimitive(Int_t px, Int_t py) 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 TGeoShape* GetMakeRuntimeShape(TGeoShape*, TGeoMatrix*) const virtual Int_t GetNmeshVertices() const Int_t GetNvert() const Int_t GetNz() const Double_t GetScale(Int_t i) const Double_t GetX(Int_t i) const Double_t GetXOffset(Int_t i) const Double_t GetY(Int_t i) const Double_t GetYOffset(Int_t i) const Double_t* GetZ() const Double_t GetZ(Int_t ipl) const virtual void InspectShape() const virtual TClass* IsA() const virtual TBuffer3D* MakeBuffer3D() const TGeoXtru& operator=(const TGeoXtru&) virtual void Paint(Option_t* option) virtual Double_t Safety(Double_t* point, Bool_t in = kTRUE) const void SetCurrentVertices(Double_t x0, Double_t y0, Double_t scale) void SetCurrentZ(Double_t z, Int_t iz) virtual void SetDimensions(Double_t* param) virtual void SetPoints(Double_t* buff) const virtual void SetPoints(Float_t* buff) const virtual void SetSegsAndPols(TBuffer3D* buff) const virtual void ShowMembers(TMemberInspector& insp, char* parent) virtual void Sizeof3D() const virtual void Streamer(TBuffer& b) void StreamerNVirtual(TBuffer& b) Double_t& Z(Int_t ipl)

Data Members


    protected:
Int_t fNvert number of vertices of the 2D polygon (at least 3) Int_t fNz number of z planes (at least two) Double_t fZcurrent current Z position TGeoPolygon* fPoly polygon defining section shape Double_t* fX [fNvert] X positions for polygon vertices Double_t* fY [fNvert] Y positions for polygon vertices Double_t* fXc [fNvert] current X positions for polygon vertices Double_t* fYc [fNvert] current Y positions for polygon vertices Double_t* fZ [fNz] array of Z planes positions Double_t* fScale [fNz] array of scale factors (for each Z) Double_t* fX0 [fNz] array of X offsets (for each Z) Double_t* fY0 [fNz] array of Y offsets (for each Z) Int_t fSeg !current segment [0,fNvert-1] Int_t fIz !current z plane [0,fNz-1]

Class Description


TGeoXtru()
 dummy ctor

TGeoXtru(Int_t nz) :TGeoBBox(0, 0, 0)
 Default constructor

TGeoXtru(Double_t *param) :TGeoBBox(0, 0, 0)
 Default constructor in GEANT3 style
 param[0] = nz  // number of z planes

 param[1] = z1  // Z position of first plane
 param[2] = x1  // X position of first plane
 param[3] = y1  // Y position of first plane
 param[4] = scale1  // scale factor for first plane
 ...
 param[4*(nz-1]+1] = zn
 param[4*(nz-1)+2] = xn
 param[4*(nz-1)+3] = yn
 param[4*(nz-1)+4] = scalen

~TGeoXtru()
 destructor

void ComputeBBox()
 compute bounding box of the pcon

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 shape
 Check Z range

Int_t DistancetoPrimitive(Int_t px, Int_t py)
 compute closest distance from point px,py to each corner

Double_t DistToPlane(Double_t *point, Double_t *dir, Int_t iz, Int_t ivert, Double_t stepmax, Bool_t in) const
 Compute distance to a Xtru lateral surface.

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 polycone
 locate Z segment

Double_t DistFromOutside(Double_t *point, Double_t *dir, Int_t iact, Double_t step, Double_t *safe) const
 compute distance from outside point to surface of the tube
   Warning("DistFromOutside", "not implemented");

Bool_t DefinePolygon(Int_t nvert, const Double_t *xv, const Double_t *yv)
 Creates the polygon representing the blueprint of any Xtru section.
   nvert     = number of vertices >2
   xv[nvert] = array of X vertex positions
   yv[nvert] = array of Y vertex positions
 *NOTE* should be called before DefineSection or ctor with 'param'

void DefineSection(Int_t snum, Double_t z, Double_t x0, Double_t y0, Double_t scale)
 defines z position of a section plane, rmin and rmax at this z.

Double_t GetZ(Int_t ipl) const

void GetPlaneNormal(const Double_t *vert, Double_t *norm) const
 Returns normal vector to the planar quadrilateral defined by vector VERT.
 The normal points outwards the xtru.

void GetPlaneVertices(Int_t iz, Int_t ivert, Double_t *vert) const
 Returns (x,y,z) of 3 vertices of the surface defined by Z sections (iz, iz+1)
 and polygon vertices (ivert, ivert+1). No range check.

Bool_t IsPointInsidePlane(Double_t *point, Double_t *vert, Double_t *norm) const
 Check if the quadrilateral defined by VERT contains a coplanar POINT.

void InspectShape() const
 Print actual Xtru parameters.

TBuffer3D* MakeBuffer3D() const
 Creates a TBuffer3D describing *this* shape.
 Coordinates are in local reference frame.

void Paint(Option_t *option)
 Paint this shape according to option

void SetSegsAndPols(TBuffer3D *buff) const
 Fill TBuffer3D structure for segments and polygons.

Double_t SafetyToSector(Double_t *point, Int_t iz, Double_t safmin)
 Compute safety to sector iz, returning also the closest segment index.

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.
---> localize the Z segment

void SetCurrentZ(Double_t z, Int_t iz)
 Recompute current section vertices for a given Z position within range of section iz.

void SetCurrentVertices(Double_t x0, Double_t y0, Double_t scale)
 Set current vertex coordinates according X0, Y0 and SCALE.

void SetDimensions(Double_t *param)
 param[0] = nz  // number of z planes

 param[1] = z1  // Z position of first plane
 param[2] = x1  // X position of first plane
 param[3] = y1  // Y position of first plane
 param[4] = scale1  // scale factor for first plane
 ...
 param[4*(nz-1]+1] = zn
 param[4*(nz-1)+2] = xn
 param[4*(nz-1)+3] = yn
 param[4*(nz-1)+4] = scalen

void SetPoints(Double_t *buff) const
 create polycone mesh points

void SetPoints(Float_t *buff) const
 create polycone mesh points

Int_t GetNmeshVertices() const
 Return number of vertices of the mesh representation

void Sizeof3D() const
/// fill size of this 3-D object
/   TVirtualGeoPainter *painter = gGeoManager->GetGeomPainter();
/   if (!painter) return;

/   Int_t numPoints = fNz*fNvert;
/   Int_t numSegs   = fNvert*(2*fNz-1);
/   Int_t numPolys  = fNvert*(fNz-1)+2;
/   painter->AddSize3D(numPoints, numSegs, numPolys);



Inline Functions


               void SetIz(Int_t iz)
               void SetSeg(Int_t iseg)
              Int_t GetNz() const
              Int_t GetNvert() const
           Double_t GetX(Int_t i) const
           Double_t GetY(Int_t i) const
           Double_t GetXOffset(Int_t i) const
           Double_t GetYOffset(Int_t i) const
           Double_t GetScale(Int_t i) const
           Double_t GetZ(Int_t ipl) const
         TGeoShape* GetMakeRuntimeShape(TGeoShape*, TGeoMatrix*) const
          Double_t& Z(Int_t ipl)
            TClass* Class()
            TClass* IsA() const
               void ShowMembers(TMemberInspector& insp, char* parent)
               void Streamer(TBuffer& b)
               void StreamerNVirtual(TBuffer& b)
           TGeoXtru TGeoXtru(const TGeoXtru&)
          TGeoXtru& operator=(const TGeoXtru&)


Author: Mihaela Gheata 24/01/04
Last update: root/geom:$Name: $:$Id: TGeoXtru.cxx,v 1.17 2004/12/07 14:24:57 brun Exp $
Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *


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