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geant4/source/geometry/navigation/include/G4VNavigation.hh
2025-06-26 09:17:29 +02:00

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//
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// G4VNavigation
//
// Class description:
//
// Navigation interface common between all navigator types.
// Author: Guilherme Amadio (CERN), March 2022
// --------------------------------------------------------------------
#ifndef G4VNAVIGATION_HH
#define G4VNAVIGATION_HH 1
#include "G4ThreeVector.hh"
class G4LogicalVolume;
class G4VPhysicalVolume;
class G4NavigationHistory;
/**
* @brief G4VNavigation class holds the common navigation interface
* for all geometry navigator types.
*/
class G4VNavigation
{
public:
/**
* Virtual Destructor.
*/
virtual ~G4VNavigation() = default;
/**
* Searches positioned volumes in mother at current top level of @p history
* for volume containing @p globalPoint. Do not test against @p blockedVol.
* If a containing volume is found, push it onto navigation history state.
* @param[in,out] history Navigation history.
* @param[in,out] blockedVol Blocked volume to be ignored in queries.
* @param[in,out] blockedNum Copy number for blocked replica volumes.
* @param[in,out] globalPoint Point in global coordinates system.
* @param[in,out] globalDirection Pointer to global direction or null.
* @param[in,out] localPoint Point in local coordinates system.
* @returns Whether a containing volume has been found.
*/
virtual G4bool LevelLocate(G4NavigationHistory& history,
const G4VPhysicalVolume* blockedVol,
const G4int blockedNum,
const G4ThreeVector& globalPoint,
const G4ThreeVector* globalDirection,
const G4bool pLocatedOnEdge,
G4ThreeVector& localPoint) = 0;
/**
* Computes the length of a step to the next boundary.
* Do not test against @p pBlockedPhysical. Identify the next candidate
* volume (if a daughter of current volume), and return it in:
* pBlockedPhysical, blockedReplicaNo.
* @param[in] localPoint Local point.
* @param[in] localDirection Local vector direction.
* @param[in] currentProposedStepLength Current proposed step length.
* @param[in,out] newSafety New safety.
* @param[in,out] history Navigation history.
* @param[in,out] validExitNormal Flag to indicate whether exit normal is
* valid or not.
* @param[in,out] exitNormal Exit normal.
* @param[in,out] entering Flag to indicate whether entering a volume.
* @param[in,out] exiting Flag to indicate whether exiting a volume.
* @param[in,out] pBlockedPhysical Blocked physical volume that should be
* ignored in queries.
* @param[in,out] blockedReplicaNo Copy number for blocked replica volumes.
* @returns Length from current point to next boundary surface along
* @p localDirection.
*/
virtual G4double ComputeStep(const G4ThreeVector& localPoint,
const G4ThreeVector& localDirection,
const G4double currentProposedStepLength,
G4double& newSafety,
G4NavigationHistory& history,
G4bool& validExitNormal,
G4ThreeVector& exitNormal,
G4bool& exiting,
G4bool& entering,
G4VPhysicalVolume*(*pBlockedPhysical),
G4int& blockedReplicaNo) = 0;
/**
* Computes the distance to the closest surface.
* @param[in] localPoint Local point.
* @param[in] history Navigation history.
* @param[in] pMaxLength Maximum step length beyond which volumes
* need not be checked.
* @returns Length from current point to closest surface.
*/
virtual G4double ComputeSafety(const G4ThreeVector& localpoint,
const G4NavigationHistory& history,
const G4double pMaxLength = DBL_MAX) = 0;
/**
* Updates internal navigation state to take into account that location
* has been moved, but remains within the @p motherPhysical volume.
* @param[in] motherPhysical Current physical volume.
* @param[in] localPoint Local point.
*/
virtual void RelocateWithinVolume(G4VPhysicalVolume* /* motherPhysical */,
const G4ThreeVector& /* localPoint */)
{
/* do nothing by default */
}
/**
* Gets current verbosity level.
*/
virtual G4int GetVerboseLevel() const { return fVerbose; }
/**
* Sets current verbosity level.
*/
virtual void SetVerboseLevel(G4int level) { fVerbose = level; }
/**
* Sets check mode.
* When enabled, forces navigator to run in "check mode", hence using
* additional verifications and stricter condictions for ensuring
* correctness. Effective only when G4VERBOSE is enabled.
*/
void CheckMode(G4bool mode) { fCheck = mode; }
protected:
G4int fVerbose = 0;
G4bool fCheck = false;
};
#endif