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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.
#include "TerrainRandomSamplePrecompute.h"
#include "SceneVehicle.h"
#include "PxTkStream.h"
#include "MediaPath.h"
using namespace PxToolkit;
#define WRITE_SEQUENCE 0
PX_FORCE_INLINE PxF32 flip(const PxF32* v)
{
const PxU8* b = (const PxU8*)v;
PxF32 f;
PxU8* bf = (PxU8*)&f;
bf[0] = b[3];
bf[1] = b[2];
bf[2] = b[1];
bf[3] = b[0];
return f;
}
TerrainRandomSamplePrecompute::TerrainRandomSamplePrecompute(SceneVehicle& app, const char* resourcePath)
: mPrecomputedRandomSequence(NULL),
mPrecomputedRandomSequenceCount(0)
{
mPrecomputedRandomSequence = new PxF32[(sizeof(PxF32)*(PRECOMPUTED_RANDOM_SEQUENCE_SIZE + 1))];
#if WRITE_SEQUENCE
char buffer[256];
const char* filename = getSampleOutputDirManager().getFilePath("SampleBaseRandomSequence", buffer, false);
const PxF32 denom = (1.0f / float(RAND_MAX));
for (PxU32 i = 0; i<PRECOMPUTED_RANDOM_SEQUENCE_SIZE; i++)
{
mPrecomputedRandomSequence[i] = float(rand()) * denom;
}
mPrecomputedRandomSequence[PRECOMPUTED_RANDOM_SEQUENCE_SIZE] = 1.0f;
PxDefaultFileOutputStream stream(filename);
stream.write(mPrecomputedRandomSequence, sizeof(PxF32)*(PRECOMPUTED_RANDOM_SEQUENCE_SIZE + 1));
#else
const char* filename = FindMediaFile("SampleBaseRandomSequence", resourcePath);
PxDefaultFileInputData stream(filename);
if (!stream.isValid())
printf("SampleBaseRandomSequence file not found");
stream.read(mPrecomputedRandomSequence, sizeof(PxF32)*(PRECOMPUTED_RANDOM_SEQUENCE_SIZE + 1));
const bool mismatch = (1.0f != mPrecomputedRandomSequence[PRECOMPUTED_RANDOM_SEQUENCE_SIZE]);
if (mismatch)
{
for (PxU32 i = 0; i<PRECOMPUTED_RANDOM_SEQUENCE_SIZE; i++)
{
mPrecomputedRandomSequence[i] = flip(&mPrecomputedRandomSequence[i]);
}
}
#endif
}
TerrainRandomSamplePrecompute::~TerrainRandomSamplePrecompute()
{
delete[] mPrecomputedRandomSequence;
mPrecomputedRandomSequenceCount = 0;
}
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