Projekt_Grafika/dependencies/physx-4.1/include/foundation/PxMath.h

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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) 2008-2019 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 PXFOUNDATION_PXMATH_H
#define PXFOUNDATION_PXMATH_H
/** \addtogroup foundation
@{
*/
#include "foundation/PxPreprocessor.h"
#if PX_VC
#pragma warning(push)
#pragma warning(disable : 4985) // 'symbol name': attributes not present on previous declaration
#endif
#include <math.h>
#if PX_VC
#pragma warning(pop)
#endif
#include <float.h>
#include "foundation/PxIntrinsics.h"
#include "foundation/PxSharedAssert.h"
#if !PX_DOXYGEN
namespace physx
{
#endif
// constants
static const float PxPi = float(3.141592653589793);
static const float PxHalfPi = float(1.57079632679489661923);
static const float PxTwoPi = float(6.28318530717958647692);
static const float PxInvPi = float(0.31830988618379067154);
static const float PxInvTwoPi = float(0.15915494309189533577);
static const float PxPiDivTwo = float(1.57079632679489661923);
static const float PxPiDivFour = float(0.78539816339744830962);
/**
\brief The return value is the greater of the two specified values.
*/
template <class T>
PX_CUDA_CALLABLE PX_FORCE_INLINE T PxMax(T a, T b)
{
return a < b ? b : a;
}
//! overload for float to use fsel on xbox
template <>
PX_CUDA_CALLABLE PX_FORCE_INLINE float PxMax(float a, float b)
{
return intrinsics::selectMax(a, b);
}
/**
\brief The return value is the lesser of the two specified values.
*/
template <class T>
PX_CUDA_CALLABLE PX_FORCE_INLINE T PxMin(T a, T b)
{
return a < b ? a : b;
}
template <>
//! overload for float to use fsel on xbox
PX_CUDA_CALLABLE PX_FORCE_INLINE float PxMin(float a, float b)
{
return intrinsics::selectMin(a, b);
}
/*
Many of these are just implemented as PX_CUDA_CALLABLE PX_FORCE_INLINE calls to the C lib right now,
but later we could replace some of them with some approximations or more
clever stuff.
*/
/**
\brief abs returns the absolute value of its argument.
*/
PX_CUDA_CALLABLE PX_FORCE_INLINE float PxAbs(float a)
{
return intrinsics::abs(a);
}
PX_CUDA_CALLABLE PX_FORCE_INLINE bool PxEquals(float a, float b, float eps)
{
return (PxAbs(a - b) < eps);
}
/**
\brief abs returns the absolute value of its argument.
*/
PX_CUDA_CALLABLE PX_FORCE_INLINE double PxAbs(double a)
{
return ::fabs(a);
}
/**
\brief abs returns the absolute value of its argument.
*/
PX_CUDA_CALLABLE PX_FORCE_INLINE int32_t PxAbs(int32_t a)
{
return ::abs(a);
}
/**
\brief Clamps v to the range [hi,lo]
*/
template <class T>
PX_CUDA_CALLABLE PX_FORCE_INLINE T PxClamp(T v, T lo, T hi)
{
PX_SHARED_ASSERT(lo <= hi);
return PxMin(hi, PxMax(lo, v));
}
//! \brief Square root.
PX_CUDA_CALLABLE PX_FORCE_INLINE float PxSqrt(float a)
{
return intrinsics::sqrt(a);
}
//! \brief Square root.
PX_CUDA_CALLABLE PX_FORCE_INLINE double PxSqrt(double a)
{
return ::sqrt(a);
}
//! \brief reciprocal square root.
PX_CUDA_CALLABLE PX_FORCE_INLINE float PxRecipSqrt(float a)
{
return intrinsics::recipSqrt(a);
}
//! \brief reciprocal square root.
PX_CUDA_CALLABLE PX_FORCE_INLINE double PxRecipSqrt(double a)
{
return 1 / ::sqrt(a);
}
//! trigonometry -- all angles are in radians.
//! \brief Sine of an angle ( <b>Unit:</b> Radians )
PX_CUDA_CALLABLE PX_FORCE_INLINE float PxSin(float a)
{
return intrinsics::sin(a);
}
//! \brief Sine of an angle ( <b>Unit:</b> Radians )
PX_CUDA_CALLABLE PX_FORCE_INLINE double PxSin(double a)
{
return ::sin(a);
}
//! \brief Cosine of an angle (<b>Unit:</b> Radians)
PX_CUDA_CALLABLE PX_FORCE_INLINE float PxCos(float a)
{
return intrinsics::cos(a);
}
//! \brief Cosine of an angle (<b>Unit:</b> Radians)
PX_CUDA_CALLABLE PX_FORCE_INLINE double PxCos(double a)
{
return ::cos(a);
}
/**
\brief Tangent of an angle.
<b>Unit:</b> Radians
*/
PX_CUDA_CALLABLE PX_FORCE_INLINE float PxTan(float a)
{
return ::tanf(a);
}
/**
\brief Tangent of an angle.
<b>Unit:</b> Radians
*/
PX_CUDA_CALLABLE PX_FORCE_INLINE double PxTan(double a)
{
return ::tan(a);
}
/**
\brief Arcsine.
Returns angle between -PI/2 and PI/2 in radians
<b>Unit:</b> Radians
*/
PX_CUDA_CALLABLE PX_FORCE_INLINE float PxAsin(float f)
{
return ::asinf(PxClamp(f, -1.0f, 1.0f));
}
/**
\brief Arcsine.
Returns angle between -PI/2 and PI/2 in radians
<b>Unit:</b> Radians
*/
PX_CUDA_CALLABLE PX_FORCE_INLINE double PxAsin(double f)
{
return ::asin(PxClamp(f, -1.0, 1.0));
}
/**
\brief Arccosine.
Returns angle between 0 and PI in radians
<b>Unit:</b> Radians
*/
PX_CUDA_CALLABLE PX_FORCE_INLINE float PxAcos(float f)
{
return ::acosf(PxClamp(f, -1.0f, 1.0f));
}
/**
\brief Arccosine.
Returns angle between 0 and PI in radians
<b>Unit:</b> Radians
*/
PX_CUDA_CALLABLE PX_FORCE_INLINE double PxAcos(double f)
{
return ::acos(PxClamp(f, -1.0, 1.0));
}
/**
\brief ArcTangent.
Returns angle between -PI/2 and PI/2 in radians
<b>Unit:</b> Radians
*/
PX_CUDA_CALLABLE PX_FORCE_INLINE float PxAtan(float a)
{
return ::atanf(a);
}
/**
\brief ArcTangent.
Returns angle between -PI/2 and PI/2 in radians
<b>Unit:</b> Radians
*/
PX_CUDA_CALLABLE PX_FORCE_INLINE double PxAtan(double a)
{
return ::atan(a);
}
/**
\brief Arctangent of (x/y) with correct sign.
Returns angle between -PI and PI in radians
<b>Unit:</b> Radians
*/
PX_CUDA_CALLABLE PX_FORCE_INLINE float PxAtan2(float x, float y)
{
return ::atan2f(x, y);
}
/**
\brief Arctangent of (x/y) with correct sign.
Returns angle between -PI and PI in radians
<b>Unit:</b> Radians
*/
PX_CUDA_CALLABLE PX_FORCE_INLINE double PxAtan2(double x, double y)
{
return ::atan2(x, y);
}
//! \brief returns true if the passed number is a finite floating point number as opposed to INF, NAN, etc.
PX_CUDA_CALLABLE PX_FORCE_INLINE bool PxIsFinite(float f)
{
return intrinsics::isFinite(f);
}
//! \brief returns true if the passed number is a finite floating point number as opposed to INF, NAN, etc.
PX_CUDA_CALLABLE PX_FORCE_INLINE bool PxIsFinite(double f)
{
return intrinsics::isFinite(f);
}
PX_CUDA_CALLABLE PX_FORCE_INLINE float PxFloor(float a)
{
return ::floorf(a);
}
PX_CUDA_CALLABLE PX_FORCE_INLINE float PxExp(float a)
{
return ::expf(a);
}
PX_CUDA_CALLABLE PX_FORCE_INLINE float PxCeil(float a)
{
return ::ceilf(a);
}
PX_CUDA_CALLABLE PX_FORCE_INLINE float PxSign(float a)
{
return physx::intrinsics::sign(a);
}
PX_CUDA_CALLABLE PX_FORCE_INLINE float PxPow(float x, float y)
{
return ::powf(x, y);
}
PX_CUDA_CALLABLE PX_FORCE_INLINE float PxLog(float x)
{
return ::logf(x);
}
#if !PX_DOXYGEN
} // namespace physx
#endif
/** @} */
#endif // #ifndef PXFOUNDATION_PXMATH_H