TGeoXtru

Class Description

 dummy ctor

TGeoXtru(Int_t nz)

 Default constructor

TGeoXtru(Double_t *param)

 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(const TGeoXtru& xt)

copy constructor

TGeoXtru& operator=(const TGeoXtru& xt)

assignment operator

~TGeoXtru()

 destructor

Double_t Capacity()

 Compute capacity [length^3] of this shape.

void ComputeBBox()

 compute bounding box of the pcon

Bool_t Contains(Double_t *point)

 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)

 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)

 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)

 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)

 Return the Z coordinate for segment ipl.

void GetPlaneNormal(const Double_t *vert, Double_t *norm)

 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)

 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)

 Check if the quadrilateral defined by VERT contains a coplanar POINT.

void InspectShape()

 Print actual Xtru parameters.

TBuffer3D * MakeBuffer3D()

 Creates a TBuffer3D describing *this* shape.
 Coordinates are in local reference frame.

void SetSegsAndPols(TBuffer3D &buff)

 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)

 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 SavePrimitive(ostream &out, Option_t * /*option*/ /*= ""*/)

 Save a primitive as a C++ statement(s) on output stream "out".

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 *points)

 create polycone mesh points

void SetPoints(Float_t *points)

 create polycone mesh points

Int_t GetNmeshVertices()

 Return number of vertices of the mesh representation

void Sizeof3D()

/// 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);

void Streamer(TBuffer &R__b)

 Stream an object of class TGeoVolume.

const TBuffer3D & GetBuffer3D(Int_t reqSections, Bool_t localFrame)

 Fills a static 3D buffer and returns a reference.

void SetIz(Int_t iz)

void SetSeg(Int_t iseg)

void ComputeNormal(Double_t *point, Double_t *dir, Double_t *norm)

Int_t GetNz()

   virtual Int_t         GetByteCount() const {return 60+12*fNz;}

Int_t GetNvert()

Double_t GetX(Int_t i)

Double_t GetY(Int_t i)

Double_t GetXOffset(Int_t i)

Double_t GetYOffset(Int_t i)

Double_t GetScale(Int_t i)

Double_t GetZ(Int_t ipl)

Author: Mihaela Gheata 24/01/04
Last update: root/geom:$Name: $:$Id: TGeoXtru.cxx,v 1.35 2006/07/09 05:27:54 brun Exp $
Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *

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TGeoXtru

class TGeoXtru : public TGeoBBox

Data Members

Class Description