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