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/*
* Copyright (c) 2008-2015, NVIDIA CORPORATION. All rights reserved.
*
* NVIDIA CORPORATION and its licensors retain all intellectual property
* and proprietary rights in and to this software, related documentation
* and any modifications thereto. Any use, reproduction, disclosure or
* distribution of this software and related documentation without an express
* license agreement from NVIDIA CORPORATION is strictly prohibited.
*/
#ifndef EMITTER_LOD_PARAM_DESC_H
#define EMITTER_LOD_PARAM_DESC_H
#include "Apex.h"
namespace nvidia
{
namespace apex
{
PX_PUSH_PACK_DEFAULT
///LOD parameters fro emitters
class EmitterLodParamDesc : public ApexDesc
{
public:
float maxDistance; ///< Objects greater than this distance from the player will be culled more aggressively
float distanceWeight; ///< Weight given to distance parameter in LOD function
float speedWeight; ///< Weight given to velocity parameter in LOD function
float lifeWeight; ///< Weight given to life remain parameter in LOD function
float separationWeight; ///< Weight given to separation parameter in LOD function
float bias; ///< Bias given to objects spawned by this emitter, relative to other emitters in the same IOS
/**
\brief constructor sets to default.
*/
PX_INLINE EmitterLodParamDesc() : ApexDesc()
{
init();
}
/**
\brief sets members to default values.
*/
PX_INLINE void setToDefault()
{
ApexDesc::setToDefault();
init();
}
/**
\brief checks if this is a valid descriptor.
*/
PX_INLINE bool isValid() const
{
if (distanceWeight < 0.0f || speedWeight < 0.0f || lifeWeight < 0.0f)
{
return false;
}
if (separationWeight < 0.0f || maxDistance < 0.0f || bias < 0.0f)
{
return false;
}
return ApexDesc::isValid();
}
/**
\brief enum of manifest versions
*/
enum ManifestVersions
{
initial,
count,
current = count - 1
};
private:
PX_INLINE void init()
{
// These defaults give you pure distance based LOD weighting
maxDistance = 0.0f;
distanceWeight = 1.0f;
speedWeight = 0.0f;
lifeWeight = 0.0f;
separationWeight = 0.0f;
bias = 1.0f;
}
};
PX_POP_PACK
}
} // end namespace nvidia
#endif // EMITTER_LOD_PARAM_DESC_H
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