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#ifndef PX_PARTICLESYSTEM_NXPARTICLECREATIONDATA
#define PX_PARTICLESYSTEM_NXPARTICLECREATIONDATA
/** \addtogroup particles
@{
*/

#include "PxPhysX.h"
#include "foundation/PxVec3.h"
#include "foundation/PxStrideIterator.h"

#ifndef PX_DOXYGEN
namespace physx
{
#endif

/**
\brief Descriptor-like user-side class describing buffers for particle creation.

PxParticleCreationData is used to create particles within the SDK.

@see PxParticleBase::createParticles()
*/
class PxParticleCreationData
{
public:

	/**
	\brief The number of particles stored in the buffer. 
	*/
	PxU32									numParticles;

	/**
	\brief Particle index data.

	When creating particles, providing the particle indices is mandatory.
	*/
	PxStrideIterator<const PxU32>			indexBuffer;

	/**
	\brief Particle position data.

	When creating particles, providing the particle positions is mandatory.
	*/
	PxStrideIterator<const PxVec3>			positionBuffer;

	/**
	\brief Particle velocity data.

	Providing velocity data is optional.
	*/
	PxStrideIterator<const PxVec3>			velocityBuffer;

	/**
	\brief Particle rest offset data. 

	Values need to be in the range [0.0f, restOffset].
	If PxParticleBaseFlag.ePER_PARTICLE_REST_OFFSET is set, providing per particle rest offset data is mandatory.  
	@see PxParticleBaseFlag.ePER_PARTICLE_REST_OFFSET.
	*/
	PxStrideIterator<const PxF32>			restOffsetBuffer;

	/**
	\brief Particle flags.
	
	PxParticleFlag.eVALID, PxParticleFlag.eCOLLISION_WITH_STATIC, PxParticleFlag.eCOLLISION_WITH_DYNAMIC,
	PxParticleFlag.eCOLLISION_WITH_DRAIN, PxParticleFlag.eSPATIAL_DATA_STRUCTURE_OVERFLOW are all flags that 
	can't be set on particle creation. They are written by the SDK exclusively.
	
	Providing flag data is optional.
	@see PxParticleFlag
	*/
	PxStrideIterator<const PxU32>			flagBuffer;


	PX_INLINE ~PxParticleCreationData();
	
	/**
	\brief (Re)sets the structure to the default.	
	*/
	PX_INLINE void setToDefault();
	
	/**
	\brief Returns true if the current settings are valid
	*/
	PX_INLINE bool isValid() const;

	/**
	\brief Constructor sets to default.
	*/
	PX_INLINE	PxParticleCreationData();
};

PX_INLINE PxParticleCreationData::PxParticleCreationData()
{
	indexBuffer					= PxStrideIterator<const PxU32>();
	positionBuffer				= PxStrideIterator<const PxVec3>();
	velocityBuffer				= PxStrideIterator<const PxVec3>();
	restOffsetBuffer			= PxStrideIterator<const PxF32>();
	flagBuffer					= PxStrideIterator<const PxU32>();
}

PX_INLINE PxParticleCreationData::~PxParticleCreationData()
{

}

PX_INLINE void PxParticleCreationData::setToDefault()
{
	*this = PxParticleCreationData();
}

PX_INLINE bool PxParticleCreationData::isValid() const
{
	if (numParticles > 0 && !(indexBuffer.ptr() && positionBuffer.ptr())) return false;
	return true;
}

#ifndef PX_DOXYGEN
} // namespace physx
#endif

/** @} */
#endif