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TGeoArb8 Class Reference

An arbitrary trapezoid with less than 8 vertices standing on two parallel planes perpendicular to Z axis.

An Arb8 is defined by two quadrilaterals sitting on parallel planes, at dZ. These are defined each by 4 vertices having the coordinates (Xi,Yi,+/-dZ),i=0,3. The lateral surface of the Arb8 is defined by the 4 pairs of edges corresponding to vertices (i,i+1) on both -dZ and +dZ. If M and M' are the middles of the segments (i,i+1) at -dZ and +dZ, a lateral surface is obtained by sweeping the edge at -dZ along MM' so that it will match the corresponding one at +dZ. Since the points defining the edges are arbitrary, the lateral surfaces are not necessary planes - but twisted planes having a twist angle linear-dependent on Z.

TGeoArb8()
Default constructor.
Definition TGeoArb8.cxx:166
• dz: half-length in Z;
• ivert = [0,7]

Vertices have to be defined clockwise in the XY pane, both at +dz and -dz. The quadrilateral at -dz is defined by indices [0,3], whereas the one at +dz by vertices [4,7]. The vertex with index=7 has to be defined last, since it triggers the computation of the bounding box of the shape. Any two or more vertices in each Z plane can have the same (X,Y) coordinates. It this case, the top and bottom quadrilaterals become triangles, segments or points. The lateral surfaces are not necessary defined by a pair of segments, but by pair segment-point (making a triangle) or point-point (making a line). Any choice is valid as long as at one of the end-caps is at least a triangle. Definition at line 17 of file TGeoArb8.h.

## Public Member Functions

TGeoArb8 ()
Default constructor.

TGeoArb8 (const char *name, Double_t dz, Double_t *vertices=nullptr)
Named constructor.

TGeoArb8 (Double_t dz, Double_t *vertices=nullptr)
Constructor.

virtual ~TGeoArb8 ()
Destructor.

virtual Double_t Capacity () const
Computes capacity of the shape in [length^3].

virtual void ComputeBBox ()
Computes bounding box for an Arb8 shape.

virtual void ComputeNormal (const Double_t *point, const Double_t *dir, Double_t *norm)
Compute normal to closest surface from POINT.

virtual void ComputeNormal_v (const Double_t *points, const Double_t *dirs, Double_t *norms, Int_t vecsize)
Compute the normal for an array o points so that norm.dot.dir is positive Input: Arrays of point coordinates and directions + vector size Output: Array of normal directions.

void ComputeTwist ()
Computes tangents of twist angles (angles between projections on XY plane of corresponding -dz +dz edges).

virtual Bool_t Contains (const Double_t *point) const
Test if point is inside this shape.

virtual void Contains_v (const Double_t *points, Bool_t *inside, Int_t vecsize) const
Check the inside status for each of the points in the array.

virtual Double_t DistFromInside (const Double_t *point, const Double_t *dir, Int_t iact=1, Double_t step=TGeoShape::Big(), Double_t *safe=nullptr) const
Compute distance from inside point to surface of the shape.

virtual void DistFromInside_v (const Double_t *points, const Double_t *dirs, Double_t *dists, Int_t vecsize, Double_t *step) const
Compute distance from array of input points having directions specified by dirs. Store output in dists.

virtual Double_t DistFromOutside (const Double_t *point, const Double_t *dir, Int_t iact=1, Double_t step=TGeoShape::Big(), Double_t *safe=nullptr) const
Computes distance from outside point to surface of the shape.

virtual void DistFromOutside_v (const Double_t *points, const Double_t *dirs, Double_t *dists, Int_t vecsize, Double_t *step) const
Compute distance from array of input points having directions specified by dirs. Store output in dists.

Double_t DistToPlane (const Double_t *point, const Double_t *dir, Int_t ipl, Bool_t in) const
Computes distance to plane ipl :

virtual TGeoVolumeDivide (TGeoVolume *voldiv, const char *divname, Int_t iaxis, Int_t ndiv, Double_t start, Double_t step)
Divide this shape along one axis.

virtual Double_t GetAxisRange (Int_t iaxis, Double_t &xlo, Double_t &xhi) const
Get shape range on a given axis.

virtual void GetBoundingCylinder (Double_t *param) const
Fill vector param with the bounding cylinder parameters.

virtual Int_t GetByteCount () const

Double_t GetClosestEdge (const Double_t *point, Double_t *vert, Int_t &isegment) const
Get index of the edge of the quadrilater represented by vert closest to point.

Double_t GetDz () const

virtual Int_t GetFittingBox (const TGeoBBox *parambox, TGeoMatrix *mat, Double_t &dx, Double_t &dy, Double_t &dz) const
Fills real parameters of a positioned box inside this arb8. Returns 0 if successful.

virtual TGeoShapeGetMakeRuntimeShape (TGeoShape *, TGeoMatrix *) const
In case shape has some negative parameters, these has to be computed in order to fit the mother.

virtual Bool_t GetPointsOnFacet (Int_t, Int_t, Double_t *) const
Fills array with n random points located on the surface of indexed facet.

Double_t GetTwist (Int_t iseg) const
Get twist for segment I in range [0,3].

Double_tGetVertices ()

virtual void InspectShape () const
Prints shape parameters.

virtual TClassIsA () const

virtual Bool_t IsCylType () const

Bool_t IsTwisted () const

virtual Double_t Safety (const Double_t *point, Bool_t in=kTRUE) const
Computes the closest distance from given point to this shape.

virtual void Safety_v (const Double_t *points, const Bool_t *inside, Double_t *safe, Int_t vecsize) const
Compute safe distance from each of the points in the input array.

Double_t SafetyToFace (const Double_t *point, Int_t iseg, Bool_t in) const
Estimate safety to lateral plane defined by segment iseg in range [0,3] Might be negative: plane seen only from inside.

virtual void SavePrimitive (std::ostream &out, Option_t *option="")
Save a primitive as a C++ statement(s) on output stream "out".

virtual void SetDimensions (Double_t *param)
Set all arb8 params in one step.

void SetDz (Double_t dz)

void SetPlaneVertices (Double_t zpl, Double_t *vertices) const
Computes intersection points between plane at zpl and non-horizontal edges.

virtual void SetPoints (Double_t *points) const
Creates arb8 mesh points.

virtual void SetPoints (Float_t *points) const
Creates arb8 mesh points.

virtual void SetVertex (Int_t vnum, Double_t x, Double_t y)
Set values for a given vertex.

virtual void Sizeof3D () const
Fill size of this 3-D object.

virtual void Streamer (TBuffer &)
Stream an object of class TGeoManager.

void StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b) Public Member Functions inherited from TGeoBBox
TGeoBBox ()
Default constructor.

TGeoBBox (const char *name, Double_t dx, Double_t dy, Double_t dz, Double_t *origin=nullptr)
Constructor with shape name.

TGeoBBox (Double_t *param)
Constructor based on the array of parameters.

TGeoBBox (Double_t dx, Double_t dy, Double_t dz, Double_t *origin=nullptr)
Constructor where half-lengths are provided.

virtual ~TGeoBBox ()
Destructor.

virtual Double_t Capacity () const
Computes capacity of the shape in [length^3].

virtual void ComputeBBox ()
Compute bounding box - nothing to do in this case.

virtual void ComputeNormal (const Double_t *point, const Double_t *dir, Double_t *norm)
Computes normal to closest surface from POINT.

virtual void ComputeNormal_v (const Double_t *points, const Double_t *dirs, Double_t *norms, Int_t vecsize)
Compute the normal for an array o points so that norm.dot.dir is positive Input: Arrays of point coordinates and directions + vector size Output: Array of normal directions.

virtual Bool_t Contains (const Double_t *point) const
Test if point is inside this shape.

virtual void Contains_v (const Double_t *points, Bool_t *inside, Int_t vecsize) const
Check the inside status for each of the points in the array.

virtual Bool_t CouldBeCrossed (const Double_t *point, const Double_t *dir) const
Decides fast if the bounding box could be crossed by a vector.

virtual Int_t DistancetoPrimitive (Int_t px, Int_t py)
Compute closest distance from point px,py to each corner.

virtual Double_t DistFromInside (const Double_t *point, const Double_t *dir, Int_t iact=1, Double_t step=TGeoShape::Big(), Double_t *safe=nullptr) const
Compute distance from inside point to surface of the box.

virtual void DistFromInside_v (const Double_t *points, const Double_t *dirs, Double_t *dists, Int_t vecsize, Double_t *step) const
Compute distance from array of input points having directions specified by dirs. Store output in dists.

virtual Double_t DistFromOutside (const Double_t *point, const Double_t *dir, Int_t iact=1, Double_t step=TGeoShape::Big(), Double_t *safe=nullptr) const
Compute distance from outside point to surface of the box.

virtual void DistFromOutside_v (const Double_t *points, const Double_t *dirs, Double_t *dists, Int_t vecsize, Double_t *step) const
Compute distance from array of input points having directions specified by dirs. Store output in dists.

virtual TGeoVolumeDivide (TGeoVolume *voldiv, const char *divname, Int_t iaxis, Int_t ndiv, Double_t start, Double_t step)
Divide this box shape belonging to volume "voldiv" into ndiv equal volumes called divname, from start position with the given step.

virtual const char * GetAxisName (Int_t iaxis) const
Returns name of axis IAXIS.

virtual Double_t GetAxisRange (Int_t iaxis, Double_t &xlo, Double_t &xhi) const
Get range of shape for a given axis.

virtual void GetBoundingCylinder (Double_t *param) const
Fill vector param with the bounding cylinder parameters.

virtual const TBuffer3DGetBuffer3D (Int_t reqSections, Bool_t localFrame) const
Fills a static 3D buffer and returns a reference.

virtual Int_t GetByteCount () const

virtual Double_t GetDX () const

virtual Double_t GetDY () const

virtual Double_t GetDZ () const

virtual Double_t GetFacetArea (Int_t index=0) const
Get area in internal units of the facet with a given index.

virtual Int_t GetFittingBox (const TGeoBBox *parambox, TGeoMatrix *mat, Double_t &dx, Double_t &dy, Double_t &dz) const
Fills real parameters of a positioned box inside this one. Returns 0 if successful.

virtual TGeoShapeGetMakeRuntimeShape (TGeoShape *mother, TGeoMatrix *mat) const
In case shape has some negative parameters, these has to be computed in order to fit the mother.

virtual void GetMeshNumbers (Int_t &nvert, Int_t &nsegs, Int_t &npols) const
Returns numbers of vertices, segments and polygons composing the shape mesh.

virtual Int_t GetNmeshVertices () const

virtual const Double_tGetOrigin () const

virtual Bool_t GetPointsOnFacet (Int_t index, Int_t npoints, Double_t *array) const
Fills array with n random points located on the surface of indexed facet.

virtual Bool_t GetPointsOnSegments (Int_t npoints, Double_t *array) const
Fills array with n random points located on the line segments of the shape mesh.

virtual void InspectShape () const
Prints shape parameters.

virtual TClassIsA () const

virtual Bool_t IsCylType () const

virtual Bool_t IsNullBox () const

virtual Bool_t IsValidBox () const

virtual TBuffer3DMakeBuffer3D () const
Creates a TBuffer3D describing this shape.

virtual Double_t Safety (const Double_t *point, Bool_t in=kTRUE) const
Computes the closest distance from given point to this shape.

virtual void Safety_v (const Double_t *points, const Bool_t *inside, Double_t *safe, Int_t vecsize) const
Compute safe distance from each of the points in the input array.

virtual void SavePrimitive (std::ostream &out, Option_t *option="")
Save a primitive as a C++ statement(s) on output stream "out".

void SetBoxDimensions (Double_t dx, Double_t dy, Double_t dz, Double_t *origin=nullptr)
Set parameters of the box.

void SetBoxPoints (Double_t *points) const
Fill box vertices to an array.

virtual void SetDimensions (Double_t *param)
Set dimensions based on the array of parameters param - half-length in x param - half-length in y param - half-length in z.

virtual void SetPoints (Double_t *points) const
Fill box points.

virtual void SetPoints (Float_t *points) const
Fill box points.

virtual void SetSegsAndPols (TBuffer3D &buffer) const
Fills TBuffer3D structure for segments and polygons.

virtual void Sizeof3D () const

virtual void Streamer (TBuffer &)
Stream an object of class TObject.

void StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b) Public Member Functions inherited from TGeoShape
TGeoShape ()
Default constructor.

TGeoShape (const char *name)
Default constructor.

virtual ~TGeoShape ()
Destructor.

virtual void AfterStreamer ()

virtual Double_t Capacity () const =0

void CheckShape (Int_t testNo, Int_t nsamples=10000, Option_t *option="")

virtual void ComputeBBox ()=0

virtual void ComputeNormal (const Double_t *point, const Double_t *dir, Double_t *norm)=0

virtual void ComputeNormal_v (const Double_t *, const Double_t *, Double_t *, Int_t)

virtual Bool_t Contains (const Double_t *point) const =0

virtual void Contains_v (const Double_t *, Bool_t *, Int_t) const

virtual Bool_t CouldBeCrossed (const Double_t *point, const Double_t *dir) const =0

virtual Int_t DistancetoPrimitive (Int_t px, Int_t py)=0
Computes distance from point (px,py) to the object.

virtual Double_t DistFromInside (const Double_t *point, const Double_t *dir, Int_t iact=1, Double_t step=TGeoShape::Big(), Double_t *safe=nullptr) const =0

virtual void DistFromInside_v (const Double_t *, const Double_t *, Double_t *, Int_t, Double_t *) const

virtual Double_t DistFromOutside (const Double_t *point, const Double_t *dir, Int_t iact=1, Double_t step=TGeoShape::Big(), Double_t *safe=nullptr) const =0

virtual void DistFromOutside_v (const Double_t *, const Double_t *, Double_t *, Int_t, Double_t *) const

virtual TGeoVolumeDivide (TGeoVolume *voldiv, const char *divname, Int_t iaxis, Int_t ndiv, Double_t start, Double_t step)=0

virtual void Draw (Option_t *option="")
Draw this shape.

virtual void ExecuteEvent (Int_t event, Int_t px, Int_t py)
Execute mouse actions on this shape.

virtual const char * GetAxisName (Int_t iaxis) const =0

virtual Double_t GetAxisRange (Int_t iaxis, Double_t &xlo, Double_t &xhi) const =0

virtual void GetBoundingCylinder (Double_t *param) const =0

virtual const TBuffer3DGetBuffer3D (Int_t reqSections, Bool_t localFrame) const
Stub implementation to avoid forcing implementation at this stage.

virtual Int_t GetByteCount () const =0

virtual Int_t GetFittingBox (const TGeoBBox *parambox, TGeoMatrix *mat, Double_t &dx, Double_t &dy, Double_t &dz) const =0

Int_t GetId () const

virtual TGeoShapeGetMakeRuntimeShape (TGeoShape *mother, TGeoMatrix *mat) const =0

virtual void GetMeshNumbers (Int_t &, Int_t &, Int_t &) const

virtual const char * GetName () const
Get the shape name.

virtual Int_t GetNmeshVertices () const

const char * GetPointerName () const
Provide a pointer name containing uid.

virtual Bool_t GetPointsOnSegments (Int_t npoints, Double_t *array) const =0

virtual void InspectShape () const =0

void InvertShapeBit (UInt_t f)

virtual TClassIsA () const

virtual Bool_t IsAssembly () const

virtual Bool_t IsComposite () const

virtual Bool_t IsCylType () const =0

virtual Bool_t IsReflected () const

Bool_t IsRunTimeShape () const

Bool_t IsValid () const

virtual Bool_t IsValidBox () const =0

virtual Bool_t IsVecGeom () const

virtual TBuffer3DMakeBuffer3D () const

virtual void Paint (Option_t *option="")
Paint this shape.

void ResetShapeBit (UInt_t f)

virtual Double_t Safety (const Double_t *point, Bool_t in=kTRUE) const =0

virtual void Safety_v (const Double_t *, const Bool_t *, Double_t *, Int_t) const

virtual void SetDimensions (Double_t *param)=0

void SetId (Int_t id)

virtual void SetPoints (Double_t *points) const =0

virtual void SetPoints (Float_t *points) const =0

void SetRuntime (Bool_t flag=kTRUE)

virtual void SetSegsAndPols (TBuffer3D &buff) const =0

void SetShapeBit (UInt_t f)

void SetShapeBit (UInt_t f, Bool_t set)
Equivalent of TObject::SetBit.

Int_t ShapeDistancetoPrimitive (Int_t numpoints, Int_t px, Int_t py) const
Returns distance to shape primitive mesh.

virtual void Sizeof3D () const =0

virtual void Streamer (TBuffer &)
Stream an object of class TObject.

void StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)

Bool_t TestShapeBit (UInt_t f) const

Int_t TestShapeBits (UInt_t f) const Public Member Functions inherited from TNamed
TNamed ()

TNamed (const char *name, const char *title)

TNamed (const TNamed &named)
TNamed copy ctor.

TNamed (const TString &name, const TString &title)

virtual ~TNamed ()
TNamed destructor.

void Clear (Option_t *option="") override
Set name and title to empty strings ("").

TObjectClone (const char *newname="") const override
Make a clone of an object using the Streamer facility.

Int_t Compare (const TObject *obj) const override
Compare two TNamed objects.

void Copy (TObject &named) const override
Copy this to obj.

virtual void FillBuffer (char *&buffer)
Encode TNamed into output buffer.

const char * GetName () const override
Returns name of object.

const char * GetTitle () const override
Returns title of object.

ULong_t Hash () const override
Return hash value for this object.

TClassIsA () const override

Bool_t IsSortable () const override

void ls (Option_t *option="") const override
List TNamed name and title.

TNamedoperator= (const TNamed &rhs)
TNamed assignment operator.

void Print (Option_t *option="") const override
Print TNamed name and title.

virtual void SetName (const char *name)
Set the name of the TNamed.

virtual void SetNameTitle (const char *name, const char *title)
Set all the TNamed parameters (name and title).

virtual void SetTitle (const char *title="")
Set the title of the TNamed.

virtual Int_t Sizeof () const
Return size of the TNamed part of the TObject.

void Streamer (TBuffer &) override
Stream an object of class TObject.

void StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b) Public Member Functions inherited from TObject
TObject ()
TObject constructor.

TObject (const TObject &object)
TObject copy ctor.

virtual ~TObject ()
TObject destructor.

void AbstractMethod (const char *method) const
Use this method to implement an "abstract" method that you don't want to leave purely abstract.

Append graphics object to current pad.

virtual void Browse (TBrowser *b)
Browse object. May be overridden for another default action.

ULong_t CheckedHash ()
Check and record whether this class has a consistent Hash/RecursiveRemove setup (*) and then return the regular Hash value for this object.

virtual const char * ClassName () const
Returns name of class to which the object belongs.

virtual void Clear (Option_t *="")

virtual TObjectClone (const char *newname="") const
Make a clone of an object using the Streamer facility.

virtual Int_t Compare (const TObject *obj) const
Compare abstract method.

virtual void Copy (TObject &object) const
Copy this to obj.

virtual void Delete (Option_t *option="")
Delete this object.

virtual Int_t DistancetoPrimitive (Int_t px, Int_t py)
Computes distance from point (px,py) to the object.

virtual void Draw (Option_t *option="")
Default Draw method for all objects.

virtual void DrawClass () const
Draw class inheritance tree of the class to which this object belongs.

virtual TObjectDrawClone (Option_t *option="") const
Draw a clone of this object in the current selected pad with: gROOT->SetSelectedPad(c1).

virtual void Dump () const
Dump contents of object on stdout.

virtual void Error (const char *method, const char *msgfmt,...) const
Issue error message.

virtual void Execute (const char *method, const char *params, Int_t *error=nullptr)
Execute method on this object with the given parameter string, e.g.

virtual void Execute (TMethod *method, TObjArray *params, Int_t *error=nullptr)
Execute method on this object with parameters stored in the TObjArray.

virtual void ExecuteEvent (Int_t event, Int_t px, Int_t py)
Execute action corresponding to an event at (px,py).

virtual void Fatal (const char *method, const char *msgfmt,...) const
Issue fatal error message.

virtual TObjectFindObject (const char *name) const
Must be redefined in derived classes.

virtual TObjectFindObject (const TObject *obj) const
Must be redefined in derived classes.

virtual Option_tGetDrawOption () const
Get option used by the graphics system to draw this object.

virtual const char * GetIconName () const
Returns mime type name of object.

virtual const char * GetName () const
Returns name of object.

virtual char * GetObjectInfo (Int_t px, Int_t py) const
Returns string containing info about the object at position (px,py).

virtual Option_tGetOption () const

virtual const char * GetTitle () const
Returns title of object.

virtual UInt_t GetUniqueID () const
Return the unique object id.

virtual Bool_t HandleTimer (TTimer *timer)
Execute action in response of a timer timing out.

virtual ULong_t Hash () const
Return hash value for this object.

Bool_t HasInconsistentHash () const
Return true is the type of this object is known to have an inconsistent setup for Hash and RecursiveRemove (i.e.

virtual void Info (const char *method, const char *msgfmt,...) const
Issue info message.

virtual Bool_t InheritsFrom (const char *classname) const
Returns kTRUE if object inherits from class "classname".

virtual Bool_t InheritsFrom (const TClass *cl) const
Returns kTRUE if object inherits from TClass cl.

virtual void Inspect () const
Dump contents of this object in a graphics canvas.

void InvertBit (UInt_t f)

virtual TClassIsA () const

Bool_t IsDestructed () const
IsDestructed.

virtual Bool_t IsEqual (const TObject *obj) const
Default equal comparison (objects are equal if they have the same address in memory).

virtual Bool_t IsFolder () const
Returns kTRUE in case object contains browsable objects (like containers or lists of other objects).

R__ALWAYS_INLINE Bool_t IsOnHeap () const

virtual Bool_t IsSortable () const

R__ALWAYS_INLINE Bool_t IsZombie () const

virtual void ls (Option_t *option="") const
The ls function lists the contents of a class on stdout.

void MayNotUse (const char *method) const
Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary).

virtual Bool_t Notify ()
This method must be overridden to handle object notification.

void Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const
Use this method to declare a method obsolete.

void operator delete (void *ptr)
Operator delete.

void operator delete[] (void *ptr)
Operator delete [].

void * operator new (size_t sz)

void * operator new (size_t sz, void *vp)

void * operator new[] (size_t sz)

void * operator new[] (size_t sz, void *vp)

TObjectoperator= (const TObject &rhs)
TObject assignment operator.

virtual void Paint (Option_t *option="")
This method must be overridden if a class wants to paint itself.

virtual void Pop ()
Pop on object drawn in a pad to the top of the display list.

virtual void Print (Option_t *option="") const
This method must be overridden when a class wants to print itself.

virtual Int_t Read (const char *name)
Read contents of object with specified name from the current directory.

virtual void RecursiveRemove (TObject *obj)
Recursively remove this object from a list.

void ResetBit (UInt_t f)

virtual void SaveAs (const char *filename="", Option_t *option="") const
Save this object in the file specified by filename.

virtual void SavePrimitive (std::ostream &out, Option_t *option="")
Save a primitive as a C++ statement(s) on output stream "out".

void SetBit (UInt_t f)

void SetBit (UInt_t f, Bool_t set)
Set or unset the user status bits as specified in f.

virtual void SetDrawOption (Option_t *option="")
Set drawing option for object.

virtual void SetUniqueID (UInt_t uid)
Set the unique object id.

virtual void Streamer (TBuffer &)
Stream an object of class TObject.

void StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)

virtual void SysError (const char *method, const char *msgfmt,...) const
Issue system error message.

R__ALWAYS_INLINE Bool_t TestBit (UInt_t f) const

Int_t TestBits (UInt_t f) const

virtual void UseCurrentStyle ()
Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked.

virtual void Warning (const char *method, const char *msgfmt,...) const
Issue warning message.

virtual Int_t Write (const char *name=nullptr, Int_t option=0, Int_t bufsize=0)
Write this object to the current directory.

virtual Int_t Write (const char *name=nullptr, Int_t option=0, Int_t bufsize=0) const
Write this object to the current directory.

## Static Public Member Functions

static TClassClass ()

static const char * Class_Name ()

static constexpr Version_t Class_Version ()

static const char * DeclFileName ()

static void GetPlaneNormal (Double_t *p1, Double_t *p2, Double_t *p3, Double_t *norm)
Computes normal to plane defined by P1, P2 and P3.

static Bool_t InsidePolygon (Double_t x, Double_t y, Double_t *pts)
Finds if a point in XY plane is inside the polygon defines by PTS.

static Bool_t IsSamePoint (const Double_t *p1, const Double_t *p2) Static Public Member Functions inherited from TGeoBBox
static Bool_t AreOverlapping (const TGeoBBox *box1, const TGeoMatrix *mat1, const TGeoBBox *box2, const TGeoMatrix *mat2)
Check if 2 positioned boxes overlap.

static TClassClass ()

static const char * Class_Name ()

static constexpr Version_t Class_Version ()

static Bool_t Contains (const Double_t *point, Double_t dx, Double_t dy, Double_t dz, const Double_t *origin)
Static method to check if point is located inside a box of having dx, dy, dz as half-lengths.

static const char * DeclFileName ()

static Double_t DistFromInside (const Double_t *point, const Double_t *dir, Double_t dx, Double_t dy, Double_t dz, const Double_t *origin, Double_t stepmax=TGeoShape::Big())
Compute distance from inside point to surface of the box.

static Double_t DistFromOutside (const Double_t *point, const Double_t *dir, Double_t dx, Double_t dy, Double_t dz, const Double_t *origin, Double_t stepmax=TGeoShape::Big())
Compute distance from outside point to surface of the box. Static Public Member Functions inherited from TGeoShape
static Double_t Big ()

static TClassClass ()

static const char * Class_Name ()

static constexpr Version_t Class_Version ()

static Double_t ComputeEpsMch ()
Compute machine round-off double precision error as the smallest number that if added to 1.0 is different than 1.0.

static const char * DeclFileName ()

static Double_t DistToPhiMin (const Double_t *point, const Double_t *dir, Double_t s1, Double_t c1, Double_t s2, Double_t c2, Double_t sm, Double_t cm, Bool_t in=kTRUE)
compute distance from point (inside phi) to both phi planes. Return minimum.

static Double_t EpsMch ()
static function returning the machine round-off error

static TGeoMatrixGetTransform ()
Returns current transformation matrix that applies to shape.

static Bool_t IsCloseToPhi (Double_t epsil, const Double_t *point, Double_t c1, Double_t s1, Double_t c2, Double_t s2)
True if point is closer than epsil to one of the phi planes defined by c1,s1 or c2,s2.

static Bool_t IsCrossingSemiplane (const Double_t *point, const Double_t *dir, Double_t cphi, Double_t sphi, Double_t &snext, Double_t &rxy)
Compute distance from POINT to semiplane defined by PHI angle along DIR.

static Bool_t IsInPhiRange (const Double_t *point, Double_t phi1, Double_t phi2)
Static method to check if a point is in the phi range (phi1, phi2) [degrees].

static Bool_t IsSameWithinTolerance (Double_t a, Double_t b)
Check if two numbers differ with less than a tolerance.

static Bool_t IsSegCrossing (Double_t x1, Double_t y1, Double_t x2, Double_t y2, Double_t x3, Double_t y3, Double_t x4, Double_t y4)
Check if segments (A,B) and (C,D) are crossing, where: A(x1,y1), B(x2,y2), C(x3,y3), D(x4,y4)

static void NormalPhi (const Double_t *point, const Double_t *dir, Double_t *norm, Double_t c1, Double_t s1, Double_t c2, Double_t s2)
Static method to compute normal to phi planes.

static Double_t SafetyPhi (const Double_t *point, Bool_t in, Double_t phi1, Double_t phi2)
Static method to compute safety w.r.t a phi corner defined by cosines/sines of the angles phi1, phi2.

static Double_t SafetySeg (Double_t r, Double_t z, Double_t r1, Double_t z1, Double_t r2, Double_t z2, Bool_t outer)
Compute distance from point of coordinates (r,z) to segment (r1,z1):(r2,z2)

static void SetTransform (TGeoMatrix *matrix)
Set current transformation matrix that applies to shape.

static Double_t Tolerance () Static Public Member Functions inherited from TNamed
static TClassClass ()

static const char * Class_Name ()

static constexpr Version_t Class_Version ()

static const char * DeclFileName () Static Public Member Functions inherited from TObject
static TClassClass ()

static const char * Class_Name ()

static constexpr Version_t Class_Version ()

static const char * DeclFileName ()

static Longptr_t GetDtorOnly ()
Return destructor only flag.

static Bool_t GetObjectStat ()
Get status of object stat flag.

static void SetDtorOnly (void *obj)
Set destructor only flag.

static void SetObjectStat (Bool_t stat)
Turn on/off tracking of objects in the TObjectTable.

## Protected Types

enum  EGeoArb8Type { kArb8Trap = (1ULL << ( 27 )) , kArb8Tra = (1ULL << ( 28 )) } Protected Types inherited from TObject
enum  { kOnlyPrepStep = (1ULL << ( 3 )) }

## Protected Member Functions

TGeoArb8 (const TGeoArb8 &)=delete

void CopyTwist (Double_t *twist=nullptr)
Copy twist values from source array.

TGeoArb8operator= (const TGeoArb8 &)=delete Protected Member Functions inherited from TGeoBBox
TGeoBBox (const TGeoBBox &)=delete

virtual void FillBuffer3D (TBuffer3D &buffer, Int_t reqSections, Bool_t localFrame) const
Fills the supplied buffer, with sections in desired frame See TBuffer3D.h for explanation of sections, frame etc.

TGeoBBoxoperator= (const TGeoBBox &)=delete Protected Member Functions inherited from TGeoShape
virtual void FillBuffer3D (TBuffer3D &buffer, Int_t reqSections, Bool_t localFrame) const
Fill the supplied buffer, with sections in desired frame See TBuffer3D.h for explanation of sections, frame etc.

Int_t GetBasicColor () const
Get the basic color (0-7).

void SetOnBoundary (Bool_t)

void TransformPoints (Double_t *points, UInt_t NbPoints) const
Tranform a set of points (LocalToMaster) Protected Member Functions inherited from TObject
virtual void DoError (int level, const char *location, const char *fmt, va_list va) const
Interface to ErrorHandler (protected).

void MakeZombie ()

## Protected Attributes

Double_t fDz {0}

Double_tfTwist {nullptr}

Double_t fXY 
 tangents of twist angles Protected Attributes inherited from TGeoBBox
Double_t fDX

Double_t fDY

Double_t fDZ

Double_t fOrigin Protected Attributes inherited from TGeoShape
UInt_t fShapeBits

Int_t fShapeId Protected Attributes inherited from TNamed
TString fName

TString fTitle Public Types inherited from TGeoShape
enum  EShapeType {
kBitMask32 = 0xffffffff , kGeoNoShape = 0 , kGeoBad = (1ULL << ( 0 )) , kGeoRSeg = (1ULL << ( 1 )) ,
kGeoPhiSeg = (1ULL << ( 2 )) , kGeoThetaSeg = (1ULL << ( 3 )) , kGeoVisX = (1ULL << ( 4 )) , kGeoVisY = (1ULL << ( 5 )) ,
kGeoVisZ = (1ULL << ( 6 )) , kGeoRunTimeShape = (1ULL << ( 7 )) , kGeoInvalidShape = (1ULL << ( 8 )) , kGeoTorus = (1ULL << ( 9 )) ,
kGeoBox = (1ULL << ( 10 )) , kGeoPara = (1ULL << ( 11 )) , kGeoSph = (1ULL << ( 12 )) , kGeoTube = (1ULL << ( 13 )) ,
kGeoTubeSeg = (1ULL << ( 14 )) , kGeoCone = (1ULL << ( 15 )) , kGeoConeSeg = (1ULL << ( 16 )) , kGeoPcon = (1ULL << ( 17 )) ,
kGeoPgon = (1ULL << ( 18 )) , kGeoArb8 = (1ULL << ( 19 )) , kGeoEltu = (1ULL << ( 20 )) , kGeoTrap = (1ULL << ( 21 )) ,
kGeoCtub = (1ULL << ( 22 )) , kGeoTrd1 = (1ULL << ( 23 )) , kGeoTrd2 = (1ULL << ( 24 )) , kGeoComb = (1ULL << ( 25 )) ,
kGeoClosedShape = (1ULL << ( 26 )) , kGeoXtru = (1ULL << ( 27 )) , kGeoParaboloid = (1ULL << ( 28 )) , kGeoHalfSpace = (1ULL << ( 29 )) ,
kGeoHype = (1ULL << ( 30 )) , kGeoSavePrimitive = (1ULL << ( 20 ))
} Public Types inherited from TObject
enum  {
kIsOnHeap = 0x01000000 , kNotDeleted = 0x02000000 , kZombie = 0x04000000 , kInconsistent = 0x08000000 ,
}

enum  { kSingleKey = (1ULL << ( 0 )) , kOverwrite = (1ULL << ( 1 )) , kWriteDelete = (1ULL << ( 2 )) }

enum  EDeprecatedStatusBits { kObjInCanvas = (1ULL << ( 3 )) }

enum  EStatusBits {
kCanDelete = (1ULL << ( 0 )) , kMustCleanup = (1ULL << ( 3 )) , kIsReferenced = (1ULL << ( 4 )) , kHasUUID = (1ULL << ( 5 )) ,
kCannotPick = (1ULL << ( 6 )) , kNoContextMenu = (1ULL << ( 8 )) , kInvalidObject = (1ULL << ( 13 ))
}

#include <TGeoArb8.h>

Inheritance diagram for TGeoArb8:
[legend]

## ◆ EGeoArb8Type

 protected
Enumerator
kArb8Trap
kArb8Tra

Definition at line 20 of file TGeoArb8.h.

## ◆ TGeoArb8() [1/4]

 TGeoArb8::TGeoArb8 ( const TGeoArb8 & )
protecteddelete

## ◆ TGeoArb8() [2/4]

 TGeoArb8::TGeoArb8 ( )

Default constructor.

Definition at line 166 of file TGeoArb8.cxx.

## ◆ TGeoArb8() [3/4]

 TGeoArb8::TGeoArb8 ( Double_t dz, Double_t * vertices = nullptr )

Constructor.

If the array of vertices is not null, this should be in the format : (x0, y0, x1, y1, ... , x7, y7)

Definition at line 180 of file TGeoArb8.cxx.

## ◆ TGeoArb8() [4/4]

 TGeoArb8::TGeoArb8 ( const char * name, Double_t dz, Double_t * vertices = nullptr )

Named constructor.

If the array of vertices is not null, this should be in the format : (x0, y0, x1, y1, ... , x7, y7)

Definition at line 204 of file TGeoArb8.cxx.

## ◆ ~TGeoArb8()

 TGeoArb8::~TGeoArb8 ( )
virtual

Destructor.

Definition at line 227 of file TGeoArb8.cxx.

## ◆ Capacity()

 Double_t TGeoArb8::Capacity ( ) const
virtual

Computes capacity of the shape in [length^3].

Reimplemented from TGeoBBox.

Definition at line 249 of file TGeoArb8.cxx.

## ◆ Class()

 static TClass * TGeoArb8::Class ( )
static
Returns
TClass describing this class

## ◆ Class_Name()

 static const char * TGeoArb8::Class_Name ( )
static
Returns
Name of this class

## ◆ Class_Version()

 static constexpr Version_t TGeoArb8::Class_Version ( )
inlinestaticconstexpr
Returns
Version of this class

Definition at line 88 of file TGeoArb8.h.

## ◆ ComputeBBox()

 void TGeoArb8::ComputeBBox ( )
virtual

Computes bounding box for an Arb8 shape.

Reimplemented from TGeoBBox.

Definition at line 266 of file TGeoArb8.cxx.

## ◆ ComputeNormal()

 void TGeoArb8::ComputeNormal ( const Double_t * point, const Double_t * dir, Double_t * norm )
virtual

Compute normal to closest surface from POINT.

Reimplemented from TGeoBBox.

Definition at line 459 of file TGeoArb8.cxx.

## ◆ ComputeNormal_v()

 void TGeoArb8::ComputeNormal_v ( const Double_t * points, const Double_t * dirs, Double_t * norms, Int_t vecsize )
virtual

Compute the normal for an array o points so that norm.dot.dir is positive Input: Arrays of point coordinates and directions + vector size Output: Array of normal directions.

Reimplemented from TGeoBBox.

Definition at line 1293 of file TGeoArb8.cxx.

## ◆ ComputeTwist()

 void TGeoArb8::ComputeTwist ( )

Computes tangents of twist angles (angles between projections on XY plane of corresponding -dz +dz edges).

Computes also if the vertices are defined clockwise or anti-clockwise.

Definition at line 292 of file TGeoArb8.cxx.

## ◆ Contains()

 Bool_t TGeoArb8::Contains ( const Double_t * point ) const
virtual

Test if point is inside this shape.

Reimplemented from TGeoBBox.

Definition at line 524 of file TGeoArb8.cxx.

## ◆ Contains_v()

 void TGeoArb8::Contains_v ( const Double_t * points, Bool_t * inside, Int_t vecsize ) const
virtual

Check the inside status for each of the points in the array.

Input: Array of point coordinates + vector size Output: Array of Booleans for the inside of each point

Reimplemented from TGeoBBox.

Definition at line 1283 of file TGeoArb8.cxx.

## ◆ CopyTwist()

 void TGeoArb8::CopyTwist ( Double_t * twist = nullptr )
protected

Copy twist values from source array.

Definition at line 235 of file TGeoArb8.cxx.

## ◆ DeclFileName()

 static const char * TGeoArb8::DeclFileName ( )
inlinestatic
Returns
Name of the file containing the class declaration

Definition at line 88 of file TGeoArb8.h.

## ◆ DistFromInside()

 Double_t TGeoArb8::DistFromInside ( const Double_t * point, const Double_t * dir, Int_t iact = 1, Double_t step = TGeoShape::Big(), Double_t * safe = nullptr ) const
virtual

Compute distance from inside point to surface of the shape.

Reimplemented from TGeoBBox.

Reimplemented in TGeoTrap, and TGeoGtra.

Definition at line 696 of file TGeoArb8.cxx.

## ◆ DistFromInside_v()

 void TGeoArb8::DistFromInside_v ( const Double_t * points, const Double_t * dirs, Double_t * dists, Int_t vecsize, Double_t * step ) const
virtual

Compute distance from array of input points having directions specified by dirs. Store output in dists.

Reimplemented from TGeoBBox.

Reimplemented in TGeoTrap, and TGeoGtra.

Definition at line 1301 of file TGeoArb8.cxx.

## ◆ DistFromOutside()

 Double_t TGeoArb8::DistFromOutside ( const Double_t * point, const Double_t * dir, Int_t iact = 1, Double_t step = TGeoShape::Big(), Double_t * safe = nullptr ) const
virtual

Computes distance from outside point to surface of the shape.

Reimplemented from TGeoBBox.

Reimplemented in TGeoTrap, and TGeoGtra.

Definition at line 668 of file TGeoArb8.cxx.

## ◆ DistFromOutside_v()

 void TGeoArb8::DistFromOutside_v ( const Double_t * points, const Double_t * dirs, Double_t * dists, Int_t vecsize, Double_t * step ) const
virtual

Compute distance from array of input points having directions specified by dirs. Store output in dists.

Reimplemented from TGeoBBox.

Reimplemented in TGeoTrap, and TGeoGtra.

Definition at line 1309 of file TGeoArb8.cxx.

## ◆ DistToPlane()

 Double_t TGeoArb8::DistToPlane ( const Double_t * point, const Double_t * dir, Int_t ipl, Bool_t in ) const

Computes distance to plane ipl :

• ipl=0 : points 0,4,1,5
• ipl=1 : points 1,5,2,6
• ipl=2 : points 2,6,3,7
• ipl=3 : points 3,7,0,4

Definition at line 548 of file TGeoArb8.cxx.

## ◆ Divide()

 TGeoVolume * TGeoArb8::Divide ( TGeoVolume * voldiv, const char * divname, Int_t iaxis, Int_t ndiv, Double_t start, Double_t step )
virtual

Divide this shape along one axis.

Reimplemented from TGeoBBox.

Reimplemented in TGeoTrap.

Definition at line 822 of file TGeoArb8.cxx.

## ◆ GetAxisRange()

 Double_t TGeoArb8::GetAxisRange ( Int_t iaxis, Double_t & xlo, Double_t & xhi ) const
virtual

Get shape range on a given axis.

Reimplemented from TGeoBBox.

Definition at line 832 of file TGeoArb8.cxx.

## ◆ GetBoundingCylinder()

 void TGeoArb8::GetBoundingCylinder ( Double_t * param ) const
virtual

Fill vector param with the bounding cylinder parameters.

The order is the following : Rmin, Rmax, Phi1, Phi2

Reimplemented from TGeoBBox.

Definition at line 850 of file TGeoArb8.cxx.

## ◆ GetByteCount()

 virtual Int_t TGeoArb8::GetByteCount ( ) const
inlinevirtual

Reimplemented from TGeoBBox.

Definition at line 62 of file TGeoArb8.h.

## ◆ GetClosestEdge()

 Double_t TGeoArb8::GetClosestEdge ( const Double_t * point, Double_t * vert, Int_t & isegment ) const

Get index of the edge of the quadrilater represented by vert closest to point.

If [P1,P2] is the closest segment and P is the point, the function returns the fraction of the projection of (P1P) over (P1P2). If projection of P is not in range [P1,P2] return -1.

Definition at line 392 of file TGeoArb8.cxx.

## ◆ GetDz()

 Double_t TGeoArb8::GetDz ( ) const
inline

Definition at line 65 of file TGeoArb8.h.

## ◆ GetFittingBox()

 Int_t TGeoArb8::GetFittingBox ( const TGeoBBox * parambox, TGeoMatrix * mat, Double_t & dx, Double_t & dy, Double_t & dz ) const
virtual

Fills real parameters of a positioned box inside this arb8. Returns 0 if successful.

Reimplemented from TGeoBBox.

Definition at line 869 of file TGeoArb8.cxx.

## ◆ GetMakeRuntimeShape()

 virtual TGeoShape * TGeoArb8::GetMakeRuntimeShape ( TGeoShape * mother, TGeoMatrix * mat ) const
inlinevirtual

In case shape has some negative parameters, these has to be computed in order to fit the mother.

Reimplemented from TGeoBBox.

Reimplemented in TGeoTrap, and TGeoGtra.

Definition at line 67 of file TGeoArb8.h.

## ◆ GetPlaneNormal()

 void TGeoArb8::GetPlaneNormal ( Double_t * p1, Double_t * p2, Double_t * p3, Double_t * norm )
static

Computes normal to plane defined by P1, P2 and P3.

Definition at line 925 of file TGeoArb8.cxx.

## ◆ GetPointsOnFacet()

 Bool_t TGeoArb8::GetPointsOnFacet ( Int_t , Int_t , Double_t * ) const
virtual

Fills array with n random points located on the surface of indexed facet.

The output array must be provided with a length of minimum 3*npoints. Returns true if operation succeeded. Possible index values:

• 0 - all facets together
• 1 to 6 - facet index from bottom to top Z

Reimplemented from TGeoBBox.

Definition at line 953 of file TGeoArb8.cxx.

## ◆ GetTwist()

 Double_t TGeoArb8::GetTwist ( Int_t iseg ) const

Get twist for segment I in range [0,3].

Definition at line 382 of file TGeoArb8.cxx.

## ◆ GetVertices()

 Double_t * TGeoArb8::GetVertices ( )
inline

Definition at line 69 of file TGeoArb8.h.

## ◆ InsidePolygon()

 Bool_t TGeoArb8::InsidePolygon ( Double_t x, Double_t y, Double_t * pts )
static

Finds if a point in XY plane is inside the polygon defines by PTS.

Definition at line 1009 of file TGeoArb8.cxx.

## ◆ InspectShape()

 void TGeoArb8::InspectShape ( ) const
virtual

Prints shape parameters.

Reimplemented from TGeoBBox.

Definition at line 1029 of file TGeoArb8.cxx.

## ◆ IsA()

 virtual TClass * TGeoArb8::IsA ( ) const
inlinevirtual
Returns
TClass describing current object

Reimplemented from TGeoBBox.

Reimplemented in TGeoTrap, and TGeoGtra.

Definition at line 88 of file TGeoArb8.h.

## ◆ IsCylType()

 virtual Bool_t TGeoArb8::IsCylType ( ) const
inlinevirtual

Reimplemented from TGeoBBox.

Definition at line 71 of file TGeoArb8.h.

## ◆ IsSamePoint()

 static Bool_t TGeoArb8::IsSamePoint ( const Double_t * p1, const Double_t * p2 )
inlinestatic

Definition at line 72 of file TGeoArb8.h.

## ◆ IsTwisted()

 Bool_t TGeoArb8::IsTwisted ( ) const
inline

Definition at line 75 of file TGeoArb8.h.

## ◆ operator=()

 TGeoArb8 & TGeoArb8::operator= ( const TGeoArb8 & )
protecteddelete

## ◆ Safety()

 Double_t TGeoArb8::Safety ( const Double_t * point, Bool_t in = kTRUE ) const
virtual

Computes the closest distance from given point to this shape.

Reimplemented from TGeoBBox.

Reimplemented in TGeoTrap, and TGeoGtra.

Definition at line 1044 of file TGeoArb8.cxx.

## ◆ Safety_v()

 void TGeoArb8::Safety_v ( const Double_t * points, const Bool_t * inside, Double_t * safe, Int_t vecsize ) const
virtual

Compute safe distance from each of the points in the input array.

Input: Array of point coordinates, array of statuses for these points, size of the arrays Output: Safety values

Reimplemented from TGeoBBox.

Reimplemented in TGeoTrap, and TGeoGtra.

Definition at line 1319 of file TGeoArb8.cxx.

## ◆ SafetyToFace()

 Double_t TGeoArb8::SafetyToFace ( const Double_t * point, Int_t iseg, Bool_t in ) const

Estimate safety to lateral plane defined by segment iseg in range [0,3] Might be negative: plane seen only from inside.

Definition at line 1122 of file TGeoArb8.cxx.

## ◆ SavePrimitive()

 void TGeoArb8::SavePrimitive ( std::ostream & out, Option_t * option = "" )
virtual

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

Reimplemented from TGeoBBox.

Reimplemented in TGeoTrap, and TGeoGtra.

Definition at line 1161 of file TGeoArb8.cxx.

## ◆ SetDimensions()

 void TGeoArb8::SetDimensions ( Double_t * param )
virtual

Set all arb8 params in one step.

param = dz param = x0 param = y0 ...

Reimplemented from TGeoBBox.

Reimplemented in TGeoTrap, and TGeoGtra.

Definition at line 1205 of file TGeoArb8.cxx.

## ◆ SetDz()

 void TGeoArb8::SetDz ( Double_t dz )
inline

Definition at line 83 of file TGeoArb8.h.

## ◆ SetPlaneVertices()

 void TGeoArb8::SetPlaneVertices ( Double_t zpl, Double_t * vertices ) const

Computes intersection points between plane at zpl and non-horizontal edges.

Definition at line 1189 of file TGeoArb8.cxx.

## ◆ SetPoints() [1/2]

 void TGeoArb8::SetPoints ( Double_t * points ) const
virtual

Creates arb8 mesh points.

Reimplemented from TGeoBBox.

Definition at line 1219 of file TGeoArb8.cxx.

## ◆ SetPoints() [2/2]

 void TGeoArb8::SetPoints ( Float_t * points ) const
virtual

Creates arb8 mesh points.

Reimplemented from TGeoBBox.

Definition at line 1231 of file TGeoArb8.cxx.

## ◆ SetVertex()

 void TGeoArb8::SetVertex ( Int_t vnum, Double_t x, Double_t y )
virtual

Set values for a given vertex.

Definition at line 1243 of file TGeoArb8.cxx.

## ◆ Sizeof3D()

 void TGeoArb8::Sizeof3D ( ) const
virtual

Fill size of this 3-D object.

Reimplemented from TGeoBBox.

Definition at line 1260 of file TGeoArb8.cxx.

## ◆ Streamer()

 void TGeoArb8::Streamer ( TBuffer & R__b )
virtual

Stream an object of class TGeoManager.

Reimplemented from TGeoBBox.

Reimplemented in TGeoTrap, and TGeoGtra.

Definition at line 1268 of file TGeoArb8.cxx.

## ◆ StreamerNVirtual()

 void TGeoArb8::StreamerNVirtual ( TBuffer & ClassDef_StreamerNVirtual_b )
inline

Definition at line 88 of file TGeoArb8.h.

## ◆ fDz

 Double_t TGeoArb8::fDz {0}
protected

Definition at line 27 of file TGeoArb8.h.

## ◆ fTwist

 Double_t* TGeoArb8::fTwist {nullptr}
protected

Definition at line 28 of file TGeoArb8.h.

## ◆ fXY

 Double_t TGeoArb8::fXY
protected

 tangents of twist angles

Definition at line 29 of file TGeoArb8.h.

Libraries for TGeoArb8: [legend]

The documentation for this class was generated from the following files: