Geometry checking package.

TGeoChecker class provides several geometry checking methods. There are two types of tests that can be performed. One is based on random sampling or ray-tracing and provides a visual check on how navigation methods work for a given geometry. The second actually checks the validity of the geometry definition in terms of overlapping/extruding objects. Both types of checks can be done for a given branch (starting with a given volume) as well as for the geometry as a whole.

TGeoChecker::CheckPoint(Double_t x, Double_t y, Double_t z)

This method can be called directly from the TGeoManager class and print a report on how a given point is classified by the modeller: which is the full path to the deepest node containing it, and the (under)estimation of the distance to the closest boundary (safety).

TGeoChecker::RandomPoints(Int_t npoints)

Can be called from TGeoVolume class. It first draws the volume and its content with the current visualization settings. Then randomly samples points in its bounding box, plotting in the geometry display only the points classified as belonging to visible volumes.

TGeoChecker::RandomRays(Int_t nrays, Double_t startx, starty, startz)

Can be called and acts in the same way as the previous, but instead of points, rays having random isotropic directions are generated from the given point. A raytracing algorithm propagates all rays until they exit geometry, plotting all segments crossing visible nodes in the same color as these.

TGeoChecker::Test(Int_t npoints)

Implementation of TGeoManager::Test(). Computes the time for the modeller to find out "Where am I?" for a given number of random points.

TGeoChecker::LegoPlot(ntheta, themin, themax, nphi, phimin, phimax,...)

Implementation of TGeoVolume::LegoPlot(). Draws a spherical radiation length lego plot for a given volume, in a given theta/phi range.

TGeoChecker::Weight(Double_t precision)

Implementation of TGeoVolume::Weight(). Estimates the total weight of a given volume by material sampling. Accepts as input the desired precision.

Definition at line 37 of file TGeoChecker.h.

Public Member Functions
	TGeoChecker ()
	Default constructor. More...

	TGeoChecker (TGeoManager *geom)
	Constructor for a given geometry. More...

virtual	~TGeoChecker ()
	Destructor. More...

virtual void	CheckBoundaryErrors (Int_t ntracks=1000000, Double_t radius=-1.)
	Check pushes and pulls needed to cross the next boundary with respect to the position given by FindNextBoundary. More...

virtual void	CheckBoundaryReference (Int_t icheck=-1)
	Check the boundary errors reference file created by CheckBoundaryErrors method. More...

void	CheckGeometry (Int_t nrays, Double_t startx, Double_t starty, Double_t startz) const
	Shoot nrays with random directions from starting point (startx, starty, startz) in the reference frame of this volume. More...

void	CheckGeometryFull (Bool_t checkoverlaps=kTRUE, Bool_t checkcrossings=kTRUE, Int_t nrays=10000, const Double_t *vertex=NULL)
	Geometry checking. More...

void	CheckOverlaps (const TGeoVolume vol, Double_t ovlp=0.1, Option_t option="")
	Check illegal overlaps for volume VOL within a limit OVLP. More...

void	CheckOverlapsBySampling (TGeoVolume *vol, Double_t ovlp=0.1, Int_t npoints=1000000) const
	Check illegal overlaps for volume VOL within a limit OVLP by sampling npoints inside the volume shape. More...

void	CheckPoint (Double_t x=0, Double_t y=0, Double_t z=0, Option_t *option="")
	Draw point (x,y,z) over the picture of the daughters of the volume containing this point. More...

void	CheckShape (TGeoShape shape, Int_t testNo, Int_t nsamples, Option_t option)
	Test for shape navigation methods. More...

Double_t	CheckVoxels (TGeoVolume vol, TGeoVoxelFinder voxels, Double_t *xyz, Int_t npoints)
	count voxel timing More...

TH2F *	LegoPlot (Int_t ntheta=60, Double_t themin=0., Double_t themax=180., Int_t nphi=90, Double_t phimin=0., Double_t phimax=360., Double_t rmin=0., Double_t rmax=9999999, Option_t *option="")
	Generate a lego plot fot the top volume, according to option. More...

TGeoOverlap *	MakeCheckOverlap (const char name, TGeoVolume vol1, TGeoVolume vol2, TGeoMatrix mat1, TGeoMatrix *mat2, Bool_t isovlp, Double_t ovlp)
	Check if the 2 non-assembly volume candidates overlap/extrude. Returns overlap object. More...

void	OpProgress (const char opname, Long64_t current, Long64_t size, TStopwatch watch=0, Bool_t last=kFALSE, Bool_t refresh=kFALSE, const char *msg="")
	Print current operation progress. More...

void	PrintOverlaps () const
	Print the current list of overlaps held by the manager class. More...

void	RandomPoints (TGeoVolume vol, Int_t npoints, Option_t option)
	Draw random points in the bounding box of a volume. More...

void	RandomRays (Int_t nrays, Double_t startx, Double_t starty, Double_t startz, const char *target_vol=0, Bool_t check_norm=kFALSE)
	Randomly shoot nrays from point (startx,starty,startz) and plot intersections with surfaces for current top node. More...

TGeoNode *	SamplePoints (Int_t npoints, Double_t &dist, Double_t epsil, const char *g3path)
	shoot npoints randomly in a box of 1E-5 around current point. More...

void	SetNmeshPoints (Int_t npoints=1000)
	Set number of points to be generated on the shape outline when checking for overlaps. More...

void	SetSelectedNode (TGeoNode *node)

void	ShapeDistances (TGeoShape shape, Int_t nsamples, Option_t option)
	Test TGeoShape::DistFromInside/Outside. More...

void	ShapeNormal (TGeoShape shape, Int_t nsamples, Option_t option)
	Check of validity of the normal for a given shape. More...

void	ShapeSafety (TGeoShape shape, Int_t nsamples, Option_t option)
	Check of validity of safe distance for a given shape. More...

Double_t *	ShootRay (Double_t start, Double_t dirx, Double_t diry, Double_t dirz, Double_t array, Int_t &nelem, Int_t &dim, Double_t *enpoint=0) const
	Shoot one ray from start point with direction (dirx,diry,dirz). More...

void	Test (Int_t npoints, Option_t *option)
	Check time of finding "Where am I" for n points. More...

void	TestOverlaps (const char *path)
	Geometry overlap checker based on sampling. More...

Bool_t	TestVoxels (TGeoVolume *vol, Int_t npoints=1000000)
	Returns optimal voxelization type for volume vol. More...

Double_t	Weight (Double_t precision=0.01, Option_t *option="v")
	Estimate weight of top level volume with a precision SIGMA(W)/W better than PRECISION. More...

Public Member Functions inherited from TObject
	TObject ()
	TObject constructor. More...

	TObject (const TObject &object)
	TObject copy ctor. More...

virtual	~TObject ()
	TObject destructor. More...

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

virtual void	AppendPad (Option_t *option="")
	Append graphics object to current pad. More...

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

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. More...

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

virtual void	Clear (Option_t *="")

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

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

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

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

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

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

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

virtual TObject *	DrawClone (Option_t *option="") const
	Draw a clone of this object in the current selected pad for instance with: `gROOT->SetSelectedPad(gPad)`. More...

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

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

virtual void	Execute (const char method, const char params, Int_t *error=0)
	Execute method on this object with the given parameter string, e.g. More...

virtual void	Execute (TMethod method, TObjArray params, Int_t *error=0)
	Execute method on this object with parameters stored in the TObjArray. More...

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

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

virtual TObject *	FindObject (const char *name) const
	Must be redefined in derived classes. More...

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

virtual Option_t *	GetDrawOption () const
	Get option used by the graphics system to draw this object. More...

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

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

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

virtual Option_t *	GetOption () const

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

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

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

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

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. More...

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

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

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

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

void	InvertBit (UInt_t f)

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

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

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. More...

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). More...

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

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

void	operator delete (void *ptr)
	Operator delete. More...

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

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)

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

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

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

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

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

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

void	ResetBit (UInt_t f)

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

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

void	SetBit (UInt_t f)

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

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

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

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

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. More...

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

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

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

Private Member Functions
void	CleanPoints (Double_t *points, Int_t &numPoints) const
	Number of points on mesh to be checked. More...

Int_t	NChecksPerVolume (TGeoVolume *vol)
	Compute number of overlaps combinations to check per volume. More...

Int_t	PropagateInGeom (Double_t , Double_t )
	Propagate from START along DIR from boundary to boundary until exiting geometry. More...

void	Score (TGeoVolume *, Int_t, Double_t)
	Score a hit for VOL. More...

Double_t	TimingPerVolume (TGeoVolume *)
	Compute timing per "FindNextBoundary" + "Safety" call. More...

Private Attributes
TBuffer3D *	fBuff1

TBuffer3D *	fBuff2

Bool_t *	fFlags
	Array of timing per volume. More...

Bool_t	fFullCheck

TGeoManager *	fGeoManager

Int_t	fNchecks
	Selected node for overlap checking. More...

Int_t	fNmeshPoints
	Number of checks for current volume. More...

TGeoNode *	fSelectedNode
	Timer. More...

TStopwatch *	fTimer
	Array of flags per volume. More...

Double_t *	fVal1

Double_t *	fVal2
	Array of number of crossings per volume. More...

TGeoVolume *	fVsafe

Additional Inherited Members
Public Types inherited from TObject
enum	{ kIsOnHeap = 0x01000000 , kNotDeleted = 0x02000000 , kZombie = 0x04000000 , kInconsistent = 0x08000000 , kBitMask = 0x00ffffff }

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

enum	EDeprecatedStatusBits { kObjInCanvas = BIT(3) }

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

Static Public Member Functions inherited from TObject
static Long_t	GetDtorOnly ()
	Return destructor only flag. More...

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

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

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

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). More...

void	MakeZombie ()

#include <TGeoChecker.h>

Inheritance diagram for TGeoChecker:

[legend]

Constructor & Destructor Documentation

◆ TGeoChecker() [1/2]

TGeoChecker::TGeoChecker ( )

Default constructor.

Definition at line 95 of file TGeoChecker.cxx.

◆ TGeoChecker() [2/2]

TGeoChecker::TGeoChecker ( TGeoManager * geom )

Constructor for a given geometry.

Definition at line 115 of file TGeoChecker.cxx.

◆ ~TGeoChecker()

TGeoChecker::~TGeoChecker ( )

virtual

Destructor.

Definition at line 137 of file TGeoChecker.cxx.

Member Function Documentation

◆ CheckBoundaryErrors()

void TGeoChecker::CheckBoundaryErrors	(	Int_t	ntracks = `1000000`,
		Double_t	radius = `-1.`
	)

virtual

Check pushes and pulls needed to cross the next boundary with respect to the position given by FindNextBoundary.

If radius is not mentioned the full bounding box will be sampled.

Definition at line 238 of file TGeoChecker.cxx.

◆ CheckBoundaryReference()

void TGeoChecker::CheckBoundaryReference ( Int_t icheck = -1 )

virtual

Check the boundary errors reference file created by CheckBoundaryErrors method.

The shape for which the crossing failed is drawn with the starting point in red and the extrapolated point to boundary (+/- failing push/pull) in yellow.

Definition at line 381 of file TGeoChecker.cxx.

◆ CheckGeometry()

void TGeoChecker::CheckGeometry	(	Int_t	nrays,
		Double_t	startx,
		Double_t	starty,
		Double_t	startz
	)		const

Shoot nrays with random directions from starting point (startx, starty, startz) in the reference frame of this volume.

Track each ray until exiting geometry, then shoot backwards from exiting point and compare boundary crossing points.

Definition at line 774 of file TGeoChecker.cxx.

◆ CheckGeometryFull()

void TGeoChecker::CheckGeometryFull	(	Bool_t	checkoverlaps = `kTRUE`,
		Bool_t	checkcrossings = `kTRUE`,
		Int_t	ntracks = `10000`,
		const Double_t *	vertex = `NULL`
	)

Geometry checking.

Optional overlap checkings (by sampling and by mesh). Optional boundary crossing check + timing per volume.

STAGE 1: extensive overlap checking by sampling per volume. Stdout need to be checked by user to get report, then TGeoVolume::CheckOverlaps(0.01, "s") can be called for the suspicious volumes.

STAGE 2: normal overlap checking using the shapes mesh - fills the list of overlaps.

STAGE 3: shooting NRAYS rays from VERTEX and counting the total number of crossings per volume (rays propagated from boundary to boundary until geometry exit). Timing computed and results stored in a histo.

STAGE 4: shooting 1 mil. random rays inside EACH volume and calling FindNextBoundary() + Safety() for each call. The timing is normalized by the number of crossings computed at stage 2 and presented as percentage. One can get a picture on which are the most "burned" volumes during transportation from geometry point of view. Another plot of the timing per volume vs. number of daughters is produced.

All histos are saved in the file statistics.root

Definition at line 474 of file TGeoChecker.cxx.

◆ CheckOverlaps()

void TGeoChecker::CheckOverlaps	(	const TGeoVolume *	vol,
		Double_t	ovlp = `0.1`,
		Option_t *	option = `""`
	)

Check illegal overlaps for volume VOL within a limit OVLP.

Definition at line 1351 of file TGeoChecker.cxx.

◆ CheckOverlapsBySampling()

void TGeoChecker::CheckOverlapsBySampling	(	TGeoVolume *	vol,
		Double_t	ovlp = `0.1`,
		Int_t	npoints = `1000000`
	)		const

Check illegal overlaps for volume VOL within a limit OVLP by sampling npoints inside the volume shape.

Definition at line 1138 of file TGeoChecker.cxx.

◆ CheckPoint()

void TGeoChecker::CheckPoint	(	Double_t	x = `0`,
		Double_t	y = `0`,
		Double_t	z = `0`,
		Option_t *	option = `""`
	)

Draw point (x,y,z) over the picture of the daughters of the volume containing this point.

Generates a report regarding the path to the node containing this point and the distance to the closest boundary.

Definition at line 1582 of file TGeoChecker.cxx.

◆ CheckShape()

void TGeoChecker::CheckShape	(	TGeoShape *	shape,
		Int_t	testNo,
		Int_t	nsamples,
		Option_t *	option
	)

Test for shape navigation methods.

Summary for test numbers:

1: DistFromInside/Outside. Sample points inside the shape. Generate directions randomly in cos(theta). Compute DistFromInside and move the point with bigger distance. Compute DistFromOutside back from new point. Plot d-(d1+d2)
2: Safety test. Sample points inside the bounding and compute safety. Generate directions randomly in cos(theta) and compute distance to boundary. Check if distance to boundary is bigger than safety

Definition at line 1637 of file TGeoChecker.cxx.

◆ CheckVoxels()

Double_t TGeoChecker::CheckVoxels	(	TGeoVolume *	vol,
		TGeoVoxelFinder *	voxels,
		Double_t *	xyz,
		Int_t	npoints
	)

count voxel timing

Definition at line 2776 of file TGeoChecker.cxx.

◆ CleanPoints()

void TGeoChecker::CleanPoints	(	Double_t *	points,
		Int_t &	numPoints
	)		const

private

Number of points on mesh to be checked.

Clean-up the mesh of pcon/pgon from useless points.

Definition at line 949 of file TGeoChecker.cxx.

◆ LegoPlot()

TH2F * TGeoChecker::LegoPlot	(	Int_t	ntheta = `60`,
		Double_t	themin = `0.`,
		Double_t	themax = `180.`,
		Int_t	nphi = `90`,
		Double_t	phimin = `0.`,
		Double_t	phimax = `360.`,
		Double_t	rmin = `0.`,
		Double_t	rmax = `9999999`,
		Option_t *	option = `""`
	)

Generate a lego plot fot the top volume, according to option.

Definition at line 2042 of file TGeoChecker.cxx.

◆ MakeCheckOverlap()

TGeoOverlap * TGeoChecker::MakeCheckOverlap	(	const char *	name,
		TGeoVolume *	vol1,
		TGeoVolume *	vol2,
		TGeoMatrix *	mat1,
		TGeoMatrix *	mat2,
		Bool_t	isovlp,
		Double_t	ovlp
	)

Check if the 2 non-assembly volume candidates overlap/extrude. Returns overlap object.

Definition at line 970 of file TGeoChecker.cxx.

◆ NChecksPerVolume()

Int_t TGeoChecker::NChecksPerVolume ( TGeoVolume * vol )

private

Compute number of overlaps combinations to check per volume.

Definition at line 1262 of file TGeoChecker.cxx.

◆ OpProgress()

void TGeoChecker::OpProgress	(	const char *	opname,
		Long64_t	current,
		Long64_t	size,
		TStopwatch *	watch = `0`,
		Bool_t	last = `kFALSE`,
		Bool_t	refresh = `kFALSE`,
		const char *	msg = `""`
	)

Print current operation progress.

Definition at line 147 of file TGeoChecker.cxx.

◆ PrintOverlaps()

void TGeoChecker::PrintOverlaps ( ) const

Print the current list of overlaps held by the manager class.

Definition at line 1569 of file TGeoChecker.cxx.

◆ PropagateInGeom()

Int_t TGeoChecker::PropagateInGeom	(	Double_t *	start,
		Double_t *	dir
	)

private

Propagate from START along DIR from boundary to boundary until exiting geometry.

Fill array of hits.

Definition at line 643 of file TGeoChecker.cxx.

◆ RandomPoints()

void TGeoChecker::RandomPoints	(	TGeoVolume *	vol,
		Int_t	npoints,
		Option_t *	option
	)

Draw random points in the bounding box of a volume.

Definition at line 2120 of file TGeoChecker.cxx.

◆ RandomRays()

void TGeoChecker::RandomRays	(	Int_t	nrays,
		Double_t	startx,
		Double_t	starty,
		Double_t	startz,
		const char *	target_vol = `0`,
		Bool_t	check_norm = `kFALSE`
	)

Randomly shoot nrays from point (startx,starty,startz) and plot intersections with surfaces for current top node.

Definition at line 2192 of file TGeoChecker.cxx.

◆ SamplePoints()

TGeoNode * TGeoChecker::SamplePoints	(	Int_t	npoints,
		Double_t &	dist,
		Double_t	epsil,
		const char *	g3path
	)

shoot npoints randomly in a box of 1E-5 around current point.

return minimum distance to points outside make sure that path to current node is updated get the response of tgeo

Definition at line 2332 of file TGeoChecker.cxx.

◆ Score()

void TGeoChecker::Score	(	TGeoVolume *	vol,
		Int_t	ifield,
		Double_t	value
	)

private

Score a hit for VOL.

Definition at line 680 of file TGeoChecker.cxx.

◆ SetNmeshPoints()

void TGeoChecker::SetNmeshPoints ( Int_t npoints = 1000 )

Set number of points to be generated on the shape outline when checking for overlaps.

Definition at line 695 of file TGeoChecker.cxx.

◆ SetSelectedNode()

void TGeoChecker::SetSelectedNode ( TGeoNode * node )

inline

Definition at line 88 of file TGeoChecker.h.

◆ ShapeDistances()

void TGeoChecker::ShapeDistances	(	TGeoShape *	shape,
		Int_t	nsamples,
		Option_t *	option
	)

Test TGeoShape::DistFromInside/Outside.

Sample points inside the shape. Generate directions randomly in cos(theta). Compute d1 = DistFromInside and move the point on the boundary. Compute DistFromOutside and propagate with d2 making sure that the shape is not re-entered. Swap direction and call DistFromOutside that should fall back on the same point on the boundary (at d2). Propagate back on boundary then compute DistFromInside that should be bigger than d1. Plot d-(d1+d2)

Definition at line 1663 of file TGeoChecker.cxx.

◆ ShapeNormal()

void TGeoChecker::ShapeNormal	(	TGeoShape *	shape,
		Int_t	nsamples,
		Option_t *	option
	)

Check of validity of the normal for a given shape.

Sample points inside the shape. Generate directions randomly in cos(theta) and propagate to boundary. Compute normal and safety at crossing point, plot the point and generate a random direction so that (dir) dot (norm) <0.

Definition at line 1888 of file TGeoChecker.cxx.

◆ ShapeSafety()

void TGeoChecker::ShapeSafety	(	TGeoShape *	shape,
		Int_t	nsamples,
		Option_t *	option
	)

Check of validity of safe distance for a given shape.

Sample points inside the 2x bounding box and compute safety. Generate directions randomly in cos(theta) and compute distance to boundary. Check if distance to boundary is bigger than safety.

Definition at line 1818 of file TGeoChecker.cxx.

◆ ShootRay()

Double_t * TGeoChecker::ShootRay	(	Double_t *	start,
		Double_t	dirx,
		Double_t	diry,
		Double_t	dirz,
		Double_t *	array,
		Int_t &	nelem,
		Int_t &	dim,
		Double_t *	endpoint = `0`
	)		const

Shoot one ray from start point with direction (dirx,diry,dirz).

Fills input array with points just after boundary crossings.

Definition at line 2442 of file TGeoChecker.cxx.

◆ Test()

void TGeoChecker::Test	(	Int_t	npoints,
		Option_t *	option
	)

Check time of finding "Where am I" for n points.

Definition at line 2533 of file TGeoChecker.cxx.

◆ TestOverlaps()

void TGeoChecker::TestOverlaps ( const char * path )

Geometry overlap checker based on sampling.

Definition at line 2583 of file TGeoChecker.cxx.

◆ TestVoxels()

Bool_t TGeoChecker::TestVoxels	(	TGeoVolume *	vol,
		Int_t	npoints = `1000000`
	)

Returns optimal voxelization type for volume vol.

kFALSE - cartesian
kTRUE - cylindrical

Definition at line 2813 of file TGeoChecker.cxx.

◆ TimingPerVolume()

Double_t TGeoChecker::TimingPerVolume ( TGeoVolume * vol )

private

Compute timing per "FindNextBoundary" + "Safety" call.

Volume must be in the current path.

Definition at line 707 of file TGeoChecker.cxx.

◆ Weight()

Double_t TGeoChecker::Weight	(	Double_t	precision = `0.01`,
		Option_t *	option = `"v"`
	)

Estimate weight of top level volume with a precision SIGMA(W)/W better than PRECISION.

Option can be "v" - verbose (default).

Definition at line 2701 of file TGeoChecker.cxx.

Member Data Documentation

◆ fBuff1

TBuffer3D* TGeoChecker::fBuff1

private

Definition at line 43 of file TGeoChecker.h.

◆ fBuff2

TBuffer3D* TGeoChecker::fBuff2

private

Definition at line 44 of file TGeoChecker.h.

◆ fFlags

Bool_t* TGeoChecker::fFlags

private

Array of timing per volume.

Definition at line 48 of file TGeoChecker.h.

◆ fFullCheck

Bool_t TGeoChecker::fFullCheck

private

Definition at line 45 of file TGeoChecker.h.

◆ fGeoManager

TGeoManager* TGeoChecker::fGeoManager

private

Definition at line 41 of file TGeoChecker.h.

◆ fNchecks

Int_t TGeoChecker::fNchecks

private

Selected node for overlap checking.

Definition at line 51 of file TGeoChecker.h.

◆ fNmeshPoints

Int_t TGeoChecker::fNmeshPoints

private

Number of checks for current volume.

Definition at line 52 of file TGeoChecker.h.

◆ fSelectedNode

TGeoNode* TGeoChecker::fSelectedNode

private

Timer.

Definition at line 50 of file TGeoChecker.h.

◆ fTimer

TStopwatch* TGeoChecker::fTimer

private

Array of flags per volume.

Definition at line 49 of file TGeoChecker.h.

◆ fVal1

Double_t* TGeoChecker::fVal1

private

Definition at line 46 of file TGeoChecker.h.

◆ fVal2

Double_t* TGeoChecker::fVal2

private

Array of number of crossings per volume.

Definition at line 47 of file TGeoChecker.h.

◆ fVsafe

TGeoVolume* TGeoChecker::fVsafe

private

Definition at line 42 of file TGeoChecker.h.

Libraries for TGeoChecker:

[legend]

TGeoChecker::CheckPoint(Double_t x, Double_t y, Double_t z)

TGeoChecker::RandomPoints(Int_t npoints)

TGeoChecker::RandomRays(Int_t nrays, Double_t startx, starty, startz)

TGeoChecker::Test(Int_t npoints)

TGeoChecker::LegoPlot(ntheta, themin, themax, nphi, phimin, phimax,...)

TGeoChecker::Weight(Double_t precision)

Public Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Constructor & Destructor Documentation

◆ TGeoChecker() [1/2]

◆ TGeoChecker() [2/2]

◆ ~TGeoChecker()

Member Function Documentation

◆ CheckBoundaryErrors()

◆ CheckBoundaryReference()

◆ CheckGeometry()

◆ CheckGeometryFull()

◆ CheckOverlaps()

◆ CheckOverlapsBySampling()

◆ CheckPoint()

◆ CheckShape()

◆ CheckVoxels()

◆ CleanPoints()

◆ LegoPlot()

◆ MakeCheckOverlap()

◆ NChecksPerVolume()

◆ OpProgress()

◆ PrintOverlaps()

◆ PropagateInGeom()

◆ RandomPoints()

◆ RandomRays()

◆ SamplePoints()

◆ Score()

◆ SetNmeshPoints()

◆ SetSelectedNode()

◆ ShapeDistances()

◆ ShapeNormal()

◆ ShapeSafety()

◆ ShootRay()

◆ Test()

◆ TestOverlaps()

◆ TestVoxels()

◆ TimingPerVolume()

◆ Weight()

Member Data Documentation

◆ fBuff1

◆ fBuff2

◆ fFlags

◆ fFullCheck

◆ fGeoManager

◆ fNchecks

◆ fNmeshPoints

◆ fSelectedNode

◆ fTimer

◆ fVal1

◆ fVal2

◆ fVsafe