/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011 Cyan Worlds, Inc.

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.

Additional permissions under GNU GPL version 3 section 7

If you modify this Program, or any covered work, by linking or
combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
NVIDIA PhysX SDK, Microsoft DirectX SDK, OpenSSL library, Independent
JPEG Group JPEG library, Microsoft Windows Media SDK, or Apple QuickTime SDK
(or a modified version of those libraries),
containing parts covered by the terms of the Bink SDK EULA, 3ds Max EULA,
PhysX SDK EULA, DirectX SDK EULA, OpenSSL and SSLeay licenses, IJG
JPEG Library README, Windows Media SDK EULA, or QuickTime SDK EULA, the
licensors of this Program grant you additional
permission to convey the resulting work. Corresponding Source for a
non-source form of such a combination shall include the source code for
the parts of OpenSSL and IJG JPEG Library used as well as that of the covered
work.

You can contact Cyan Worlds, Inc. by email legal@cyan.com
 or by snail mail at:
      Cyan Worlds, Inc.
      14617 N Newport Hwy
      Mead, WA   99021

*==LICENSE==*/
#ifndef hsScalarMacrosDefined
#define hsScalarMacrosDefined

#include "hsFixedTypes.h"

#ifndef HS_SCALAR_IS_FLOAT
	#define HS_SCALAR_IS_FIXED		0
	#define HS_SCALAR_IS_FLOAT		1
	#define HS_NEVER_USE_FLOAT		0
#endif

#if HS_SCALAR_IS_FLOAT && HS_NEVER_USE_FLOAT
	#error "can't define HS_SCALAR_IS_FLOAT and HS_NEVER_USE_FLOAT"
#endif

#if HS_SCALAR_IS_FLOAT
	#include <math.h>
#endif

#define hsScalarDegToRad(deg)		hsScalarMul(deg, hsScalarPI / 180)
#define hsScalarRadToDeg(rad)		hsScalarMul(rad, 180 / hsScalarPI)

#if HS_SCALAR_IS_FIXED
	typedef hsFixed		hsScalar;

	#define hsScalar1			hsFixed1
	#define hsScalarHalf			(hsFixed1 >> 1)
	#define hsScalarPI			(hsFixedPI)
	#define hsScalarMax			(0x7fffffff)

	#if HS_CAN_USE_FLOAT
		#define hsFloatToScalar(x)	hsFixed((x) * float(hsFixed1))
		#define hsScalarToFloat(x)	((x) / float(hsFixed1))
	#endif

	#define hsIntToScalar(x)		hsIntToFixed(x)
	#define hsScalarToInt(x)		hsFixedToInt(x)
	#define hsScalarRound(x)		hsFixedRound(x)

	#define hsFixedToScalar(x)	(x)
	#define hsScalarToFixed(x)	(x)

	#define hsFractToScalar(x)	hsFractToFixed(x)
	#define hsScalarToFract(x)	hsFixedToFract(x)

	#define hsScalarMul(a, b)		hsFixMul(a, b)
	#define hsScalarMul2(a)		((a) << 1)
	#define hsScalarDiv(a, b)		hsFixDiv(a, b)
	#define hsScalarDiv2(a)		((a) >> 1)
	#define hsScalarInvert(a)		hsFixDiv(hsFixed1, a)
	#define hsScalarMod(a,b)		((a) % (b))
	#define hsScalarMulDiv(n1, n2, d)	hsMulDiv32(n1, n2, d)
	#define hsScalarMulAdd(a, b, c)	(hsFixMul(a, b) + (c))

	#define hsSquareRoot(scalar) hsFixSqrt(scalar)
	#define hsSine(angle)		hsFixedSin(angle)
	#define hsCosine(angle)		hsFixedCos(angle)
	#define hsTan(angle)		(hsSine(angle)/hsCosine(angle))
	#define hsASine(value)		hsFixedASin(value)
	#define hsACosine(value)		hsFixedACos(value)

#ifdef __cplusplus
	inline hsScalar hsScalarAverage(hsScalar a, hsScalar b) { return a + b >> 1; }
	inline hsScalar hsScalarAverage(hsScalar a, hsScalar b, hsScalar t)
				{
					return a + hsFixMul(t, b - a);
				}

	#if HS_CAN_USE_FLOAT
		inline hsScalar hsPow(hsScalar base, hsScalar exponent)
					{
						return hsFloatToScalar(powf(hsScalarToFloat(base), hsScalarToFloat(exponent)));
					}
		inline hsScalar hsATan2(hsScalar y, hsScalar x)
					{
						return hsFloatToScalar(atan2f(hsScalarToFloat(y), hsScalarToFloat(x)));
					}
	#endif
	inline hsScalar hsCeil(hsScalar x) { return (x + 0xFFFF) & 0xFFFF0000; }
	inline hsScalar hsFloor(hsScalar x) { return x & 0xFFFF0000; }
#endif 
#endif
#if HS_SCALAR_IS_FLOAT
	typedef float		hsScalar;

	#define hsScalar1			float(1)
	#define hsScalarHalf			float(0.5)
	#define hsScalarPI			float(HS_PI)
	#define hsScalarMax			float(3.402823466e+38F)

	#define hsFloatToScalar(x)	float(x)
	#define hsScalarToFloat(x)	float(x)

	#define hsIntToScalar(x)		float(x)
	#define hsScalarToInt(x)		Int32(x)


	#define hsFixedToScalar(x)	((hsScalar)(x) / float(hsFixed1))
	#define hsScalarToFixed(x)	hsFixed((x) * float(hsFixed1))

	#define hsFractToScalar(x)	((x) / float(hsFract1))
	#define hsScalarToFract(x)	hsFract((x) * float(hsFract1))
#ifdef __cplusplus

	#define hsScalarMod(a,b)			fmodf(a, b)
	#define hsScalarMulAdd(a, b, c)	((a) * (b) + (c))
	#define hsScalarMul(a,b)			((a) * (b))
	#define hsScalarMul2(a)			((a) * 2)
	#define hsScalarDiv(a,b)			((a) / (b))
	#define hsScalarDiv2(a)			((a) * float(0.5))
	#define hsScalarInvert(a)			(float(1) / (a))
	#define hsScalarMulDiv(n1,n2,d)	((n1) * (n2) / (d))

#ifndef HS_DEBUGGING 	/* mf horse testing defines vs inlines for VC++5.0 performance */

	#define hsScalarRound(x)			Int32((x) + ((x) < 0 ? -hsScalarHalf : hsScalarHalf))

#else /* HS_DEBUGGING - use inlines for type-checking etc...and all */
	inline Int32 hsScalarRound(float x)
	{
		float half = hsScalarHalf;
		if (x < 0)
			half = -half;
		return Int32(x + half);
	}
#endif /* HS_DEBUGGING - use inlines for type-checking etc...and all */

	inline float hsScalarAverage(float a, float b) { return (a + b) * float(0.5); }
	inline float hsScalarAverage(float a, float b, float t) { return a + t * (b - a); }

#if (HS_BUILD_FOR_BE || (HS_BUILD_FOR_UNIX && !HS_BUILD_FOR_GCC322))
	#define acosf(x)		(float)acos(x)
	#define asinf(x)		(float)asin(x)
	#define atanf(x)		(float)atan(x)
	#define atan2f(x, y)		(float)atan2(x, y)
	#define ceilf(x)			(float)ceil(x)
	#define cosf(x)			(float)cos(x)
	#define coshf(x)		(float)cosh(x)
	#define expf(x)			(float)exp(x)
	#define fabsf(x)		(float)fabs(x)
	#define floorf(x)		(float)floor(x)
	#define fmodf(x, y)		(float)fmod(x, y)
	#define logf(x)			(float)log(x)
	#define log10f(x)		(float)log10(x)
	#define powf(x, y)		(float)pow(x, y)
	#define sinf(x)			(float)sin(x)
	#define sinhf(x)		(float)sinh(x)
	#define sqrtf(x)		(float)sqrt(x)
	#define tanf(x)			(float)tan(x)
	#define tanhf(x)		(float)tanh(x)

	inline float modff(float x, float* y)
	{
		double _Di, _Df = modf(x, &_Di);
		*y = (float)_Di;
		return ((float)_Df);
	}
#endif

	inline hsScalar hsSquareRoot(hsScalar scalar) { return sqrtf(scalar); }
	inline hsScalar hsSine(hsScalar angle) { return sinf(angle); }
	inline hsScalar hsCosine(hsScalar angle) { return cosf(angle); }
	inline hsScalar hsTan(hsScalar rads) { return tanf(rads); }
	inline hsScalar hsASine(hsScalar value) { return asinf(value); }
	inline hsScalar hsACosine(hsScalar value) { return acosf(value); }
	inline hsScalar hsPow(hsScalar base, hsScalar exponent) { return powf(base, exponent); }
	inline hsScalar hsATan2(hsScalar y, hsScalar x) { return atan2f(y, x); }
	inline hsScalar hsCeil(hsScalar x) { return ceilf(x); }
	inline hsScalar hsFloor(hsScalar x) { return floorf(x); }
#endif	/* HS_SCALAR_IS_FLOAT */
#endif	/* __CPLUSPLUS */
	
//
// Macros for enabling double precision math ops
// require #include <float.h>
//
#if HS_BUILD_FOR_WIN32
#define hsDoublePrecBegin \
	unsigned int fpc=_controlfp( 0, 0);	\
	_controlfp( _PC_64, MCW_PC ); 
#define hsDoublePrecEnd \
	_controlfp( fpc, 0xfffff ); 
#else
#define hsDoublePrecBegin
#define hsDoublePrecEnd
#endif

#endif