PxHitBuffer< HitType > Struct Template Reference
[Scenequery]

Returns scene query hits (intersections) to the user in a preallocated buffer. More...

#include <PxQueryReport.h>

Inheritance diagram for PxHitBuffer< HitType >:

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Collaboration diagram for PxHitBuffer< HitType >:

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List of all members.

Public Member Functions
	PxHitBuffer (HitType *aTouches=NULL, PxU32 aMaxNbTouches=0)
	Initializes the buffer with user memory.
PX_INLINE PxU32	getNbAnyHits () const
	Computes the number of any hits in this result, blocking or touching.
PX_INLINE const HitType &	getAnyHit (const PxU32 index) const
	Convenience iterator used to access any hits in this result, blocking or touching.
PX_INLINE PxU32	getNbTouches () const
PX_INLINE const HitType *	getTouches () const
PX_INLINE const HitType &	getTouch (const PxU32 index) const
PX_INLINE PxU32	getMaxNbTouches () const
virtual	~PxHitBuffer ()
Protected Member Functions
virtual PxAgain	processTouches (const HitType *buffer, PxU32 nbHits)
	virtual callback function used to communicate query results to the user.

---

Detailed Description

template<typename HitType>
struct PxHitBuffer< HitType >

Returns scene query hits (intersections) to the user in a preallocated buffer.

Will clip touch hits to maximum buffer capacity. When clipped, an arbitrary subset of touching hits will be discarded. Overflow does not trigger warnings or errors. block and hasBlock will be valid in finalizeQuery callback and after query completion. Touching hits are guaranteed to have closer or same distance ( <= condition) as the globally nearest blocking hit at the time any processTouches() callback is issued.

Note:

Pre-made typedef shorthands, such as PxRaycastBuffer can be used for raycast, overlap and sweep queries.

See also:

PxHitCallback

PxRaycastBuffer PxOverlapBuffer PxSweepBuffer PxRaycastBufferN PxOverlapBufferN PxSweepBufferN

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Constructor & Destructor Documentation

template<typename HitType>

PxHitBuffer< HitType >::PxHitBuffer	(	HitType *	aTouches = NULL,
		PxU32	aMaxNbTouches = 0
	)			[inline]

Initializes the buffer with user memory.

The buffer is initialized with 0 touch hits by default => query will only report a single closest blocking hit. Use PxQueryFlag::eANY_HIT to tell the query to abort and return any first hit encoutered as blocking.

Parameters:

[in]	aTouches	Optional buffer for recording PxQueryHitType::eTOUCH type hits.
[in]	aMaxNbTouches	Size of touch buffer.

See also:

PxHitCallback

template<typename HitType>

virtual PxHitBuffer< HitType >::~PxHitBuffer

(

)

[inline, virtual]

---

Member Function Documentation

template<typename HitType>

PX_INLINE const HitType& PxHitBuffer< HitType >::getAnyHit

(

const PxU32

index

)

const [inline]

Convenience iterator used to access any hits in this result, blocking or touching.

template<typename HitType>

PX_INLINE PxU32 PxHitBuffer< HitType >::getMaxNbTouches

(

)

const [inline]

template<typename HitType>

PX_INLINE PxU32 PxHitBuffer< HitType >::getNbAnyHits

(

)

const [inline]

Computes the number of any hits in this result, blocking or touching.

template<typename HitType>

PX_INLINE PxU32 PxHitBuffer< HitType >::getNbTouches

(

)

const [inline]

template<typename HitType>

PX_INLINE const HitType& PxHitBuffer< HitType >::getTouch

(

const PxU32

index

)

const [inline]

template<typename HitType>

PX_INLINE const HitType* PxHitBuffer< HitType >::getTouches

(

)

const [inline]

template<typename HitType>

virtual PxAgain PxHitBuffer< HitType >::processTouches	(	const HitType *	buffer,
		PxU32	nbHits
	)			[inline, protected, virtual]

virtual callback function used to communicate query results to the user.

This callback will always be invoked with touches as a buffer if touches was specified as non-NULL. All reported touch hits are guaranteed to be closer than the closest blocking hit.

Parameters:

[in]	buffer	Callback will report touch hits to the user in this buffer. This pointer will be the same as touches.
[in]	nbHits	Number of touch hits reported in buffer. This number will not exceed maxNbTouches.

Note:

There is a significant performance penalty in case multiple touch callbacks are issued (up to 2x)

to avoid the penalty use a bigger buffer so that all touching hits can be reported in a single buffer.

If true (again) is returned from the callback, nbTouches will be reset to 0,

If false is returned, nbTouched will remain unchanged.

By the time processTouches is first called, the globally closest blocking hit is already determined,

values of hasBlock and block are final and all touch hits are guaranteed to be closer than the blocking hit.

touches and maxNbTouches can be modified inside of processTouches callback.

Returns:

true to continue receiving callbacks in case there are more hits or false to stop.

See also:

PxAgain PxRaycastHit PxSweepHit PxOverlapHit

Implements PxHitCallback< HitType >.

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The documentation for this struct was generated from the following file:

• PxQueryReport.h