ship::G4RayScanner Class Reference

Straight-line material scanner over a Geant4 geometry. More...

#include <G4RayScanner.h>

Public Member Functions
	G4RayScanner (G4LogicalVolume *top)
	Wraps top in a private world placement and closes (voxelises) that tree via G4GeometryManager.
	~G4RayScanner ()
	Re-opens the scanned tree and removes the private placement (skipped if another Geant4 user already cleaned the volume stores).
	G4RayScanner (const G4RayScanner &)=delete
G4RayScanner &	operator= (const G4RayScanner &)=delete
	G4RayScanner (G4RayScanner &&)=delete
G4RayScanner &	operator= (G4RayScanner &&)=delete
RayScan	scan (const G4ThreeVector &origin, const G4ThreeVector &direction) const
	Ordered material segments from origin (mm) along direction (normalised internally) up to the world boundary.

Detailed Description

Straight-line material scanner over a Geant4 geometry.

Uses a private G4Navigator; no G4RunManager is required. The constructor wraps top in its own world placement at the origin, so scan() coordinates are expressed in top's local frame — pass the world logical volume to scan in global coordinates, or any daughter logical volume to scan its subtree in that volume's frame.

NOT thread-safe: with a multithreaded Geant4 build, logical/physical volumes carry thread-local state, so construct and use the scanner on the thread that built the Geant4 volumes.

G4GeometryManager's closed state is a single process-wide flag, so at most one scanner may be alive while the geometry is closed: constructing a scanner while another one (or a run manager) holds the geometry closed throws instead of silently scanning without voxelisation.

Constructor & Destructor Documentation

G4RayScanner() [1/3]

ship::G4RayScanner::G4RayScanner ( G4LogicalVolume *  top )

explicit

Wraps top in a private world placement and closes (voxelises) that tree via G4GeometryManager.

Throws std::invalid_argument on null and std::logic_error if the Geant4 geometry is already closed.

~G4RayScanner()

ship::G4RayScanner::~G4RayScanner

(

)

Re-opens the scanned tree and removes the private placement (skipped if another Geant4 user already cleaned the volume stores).

G4RayScanner() [2/3]

ship::G4RayScanner::G4RayScanner ( const G4RayScanner &  )

delete

G4RayScanner() [3/3]

ship::G4RayScanner::G4RayScanner ( G4RayScanner &&  )

delete

Member Function Documentation

operator=() [1/2]

G4RayScanner & ship::G4RayScanner::operator= ( const G4RayScanner &  )

delete

operator=() [2/2]

G4RayScanner & ship::G4RayScanner::operator= ( G4RayScanner &&  )

delete

scan()

RayScan ship::G4RayScanner::scan	(	const G4ThreeVector &	origin,
		const G4ThreeVector &	direction
	)		const

Ordered material segments from origin (mm) along direction (normalised internally) up to the world boundary.

A ray starting outside the world is first advanced to its entry point (recorded as entry); a ray that misses the world returns no segments. Adjacent segments in the same material are merged. Throws std::runtime_error if navigation fails to terminate (step-limit safeguard).

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

• include/GeometryService/G4RayScanner.h
• src/G4RayScanner.cpp