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kaplademo/source/kaplaDemo/TerrainRandomSamplePrecompute.h Normal file
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//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of NVIDIA CORPORATION nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Copyright (c) 2008-2018 NVIDIA Corporation. All rights reserved.
// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
#ifndef TERRAIN_RANDOM_SAMPLE_PRECOMPUTED_H
#define TERRAIN_RANDOM_SAMPLE_PRECOMPUTED_H
#include "common/PxPhysXCommonConfig.h"
#include "foundation/PxAssert.h"
using namespace physx;
class SceneVehicle;
class TerrainRandomSamplePrecompute
{
public:
TerrainRandomSamplePrecompute(SceneVehicle& app, const char* resourcePath);
~TerrainRandomSamplePrecompute();
PxF32 getRandom() const { return mPrecomputedRandomSequence[(mPrecomputedRandomSequenceCount++) % PRECOMPUTED_RANDOM_SEQUENCE_SIZE]; }
PxF32 getRandomInRange(const PxF32 a, const PxF32 b)
{
PX_ASSERT(b>a);
return a + (b - a)*getRandom();
}
private:
enum
{
PRECOMPUTED_RANDOM_SEQUENCE_SIZE = 65536
};
PxF32* mPrecomputedRandomSequence;
mutable PxU32 mPrecomputedRandomSequenceCount;
};
#endif //TERRAIN_RANDOM_SAMPLE_PRECOMPUTED_H