o2::cad::O2BVHAssembly Class Reference

#include <O2BVHAssembly.h>

Inherits TGeoShapeAssembly.

Public Member Functions
	O2BVHAssembly ()
	O2BVHAssembly (TGeoVolumeAssembly *volume)
	Build over the daughters volume has now; later daughters trigger a lazy rebuild.
	~O2BVHAssembly () override
	O2BVHAssembly (const O2BVHAssembly &)=delete
O2BVHAssembly &	operator= (const O2BVHAssembly &)=delete
void	BuildBVH ()
	(Re)build the acceleration structure from the volume's current daughter list.
int	GetNbuilt () const
	Number of daughter placements the current BVH covers, -1 if it was never built.
size_t	GetBVHMemory () const
	Bytes held by the BVH nodes and the primitive-index permutation.
Bool_t	Contains (const Double_t *point) const override
	Contains.
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 override
	DistFromOutside – daughters are queried with the fixed query bound, so the answer is visit-order independent.
Double_t	Safety (const Double_t *point, Bool_t in=kTRUE) const override
	Safety – from inside as ROOT; from outside a nearest-daughter descent of the BVH.
Bool_t	Contains_Loop (const Double_t *point) const
Double_t	DistFromOutside_Loop (const Double_t *point, const Double_t *dir, Double_t step=TGeoShape::Big()) const
Double_t	Safety_Loop (const Double_t *point, Bool_t in=kTRUE) const

Static Public Member Functions
static O2BVHAssembly *	MakeBVHAssembly (TGeoVolumeAssembly *volume)
	Replace volume's shape by an O2BVHAssembly and return it.

Detailed Description

A BVH-accelerated drop-in for ROOT's TGeoShapeAssembly: a BVH over the daughter boxes answers Contains, DistFromOutside and Safety. Install it with MakeBVHAssembly(volume) after TGeoManager::CloseGeometry(), or construct it on the volume and call SetShape. Each query has a _Loop twin over all daughters in index order; the lowest-indexed daughter wins ties, as in ROOT. Unlike ROOT, DistFromOutside also answers from outside the bounding box of a voxelized assembly.

Definition at line 30 of file O2BVHAssembly.h.

Constructor & Destructor Documentation

O2BVHAssembly() [1/3]

O2BVHAssembly::O2BVHAssembly

(

)

Definition at line 113 of file O2BVHAssembly.cxx.

O2BVHAssembly() [2/3]

O2BVHAssembly::O2BVHAssembly ( TGeoVolumeAssembly *  volume )

explicit

Build over the daughters volume has now; later daughters trigger a lazy rebuild.

Definition at line 115 of file O2BVHAssembly.cxx.

~O2BVHAssembly()

O2BVHAssembly::~O2BVHAssembly ( )

override

Definition at line 122 of file O2BVHAssembly.cxx.

O2BVHAssembly() [3/3]

o2::cad::O2BVHAssembly::O2BVHAssembly ( const O2BVHAssembly &  )

delete

Member Function Documentation

BuildBVH()

void O2BVHAssembly::BuildBVH

(

)

(Re)build the acceleration structure from the volume's current daughter list.

BuildBVH – one primitive per daughter: its box in the assembly frame, widened and rounded outward in float.

Definition at line 140 of file O2BVHAssembly.cxx.

Contains()

Bool_t O2BVHAssembly::Contains ( const Double_t *  point ) const

override

Contains.

Definition at line 227 of file O2BVHAssembly.cxx.

Contains_Loop()

Bool_t O2BVHAssembly::Contains_Loop

(

const Double_t *

point

)

const

Definition at line 286 of file O2BVHAssembly.cxx.

DistFromOutside()

Double_t O2BVHAssembly::DistFromOutside ( const Double_t *  point, const Double_t *  dir, Int_t  iact = 1, Double_t  step = TGeoShape::Big(), Double_t *  safe = nullptr  ) const

override

DistFromOutside – daughters are queried with the fixed query bound, so the answer is visit-order independent.

Definition at line 311 of file O2BVHAssembly.cxx.

DistFromOutside_Loop()

Double_t O2BVHAssembly::DistFromOutside_Loop	(	const Double_t *	point,
		const Double_t *	dir,
		Double_t	step = TGeoShape::Big()
	)		const

Definition at line 373 of file O2BVHAssembly.cxx.

GetBVHMemory()

size_t O2BVHAssembly::GetBVHMemory

(

)

const

Bytes held by the BVH nodes and the primitive-index permutation.

Definition at line 128 of file O2BVHAssembly.cxx.

GetNbuilt()

int o2::cad::O2BVHAssembly::GetNbuilt ( ) const

inline

Number of daughter placements the current BVH covers, -1 if it was never built.

Definition at line 44 of file O2BVHAssembly.h.

MakeBVHAssembly()

O2BVHAssembly * O2BVHAssembly::MakeBVHAssembly ( TGeoVolumeAssembly *  volume )

static

Replace volume's shape by an O2BVHAssembly and return it.

MakeBVHAssembly.

Definition at line 481 of file O2BVHAssembly.cxx.

operator=()

O2BVHAssembly & o2::cad::O2BVHAssembly::operator= ( const O2BVHAssembly &  )

delete

Safety()

Double_t O2BVHAssembly::Safety ( const Double_t *  point, Bool_t  in = kTRUE  ) const

override

Safety – from inside as ROOT; from outside a nearest-daughter descent of the BVH.

Definition at line 403 of file O2BVHAssembly.cxx.

Safety_Loop()

Double_t O2BVHAssembly::Safety_Loop	(	const Double_t *	point,
		Bool_t	in = kTRUE
	)		const

Definition at line 461 of file O2BVHAssembly.cxx.

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

• /home/runner/work/AliceO2/AliceO2/Detectors/CADSupport/include/CADSupport/O2BVHAssembly.h
• /home/runner/work/AliceO2/AliceO2/Detectors/CADSupport/src/O2BVHAssembly.cxx