/*---------------------------------------------------------------------------*
  Project:  TwlSDK - FX - 
  File:     fx_trig.h

  Copyright 2003-2008 Nintendo.  All rights reserved.

  These coded instructions, statements, and computer programs contain
  proprietary information of Nintendo of America Inc. and/or Nintendo
  Company Ltd., and are protected by Federal copyright law.  They may
  not be disclosed to third parties or copied or duplicated in any form,
  in whole or in part, without the prior written consent of Nintendo.

  $Date:: 2008-09-18#$
  $Rev: 8573 $
  $Author: okubata_ryoma $
 *---------------------------------------------------------------------------*/


#ifndef NITRO_FXTRIG_H_
#define NITRO_FXTRIG_H_

#include <nitro/fx/fx.h>

#ifdef __cplusplus
extern "C" {
#endif

//----------------------------------------------------------------------------
// Type definition
//----------------------------------------------------------------------------
#ifdef SDK_FX_DYNAMIC_TABLE
extern fx16 FX_SinCosTable_[];
#else
extern const fx16 FX_SinCosTable_[];
#endif

//----------------------------------------------------------------------------
// Declaration of function
//----------------------------------------------------------------------------

// deg must be in fx32/fx16 format
#define FX_DEG_TO_RAD(deg)            ((fx32)((FX64C_TWOPI_360 * (deg) + 0x80000000LL) >> 32))
#define FX_DEG_TO_IDX(deg)            ((u16) ((FX64C_65536_360 * (deg) + 0x80000000000LL) >> 44))

// rad must be in fx32/fx16 format
#define FX_RAD_TO_DEG(rad)            ((fx32)((FX64C_360_TWOPI * (rad) + 0x80000000LL) >> 32))
#define FX_RAD_TO_IDX(rad)            ((u16)((FX64C_65536_TWOPI * (rad) + 0x80000000000LL) >> 44))

#define FX_IDX_TO_RAD(idx)            ((fx32)((FX64C_TWOPI_65536 * (idx) + 0x80000LL) >> 20))
#define FX_IDX_TO_DEG(idx)            ((fx32)((FX64C_360_65536 * (idx) + 0x80000LL) >> 20))

SDK_DECL_INLINE fx16 FX_SinIdx(int idx);
SDK_DECL_INLINE fx16 FX_CosIdx(int idx);

u16     FX_AtanIdx(fx32 x);
u16     FX_Atan2Idx(fx32 y, fx32 x);

fx16    FX_Atan(fx32 x);
fx16    FX_Atan2(fx32 y, fx32 x);

u16     FX_AsinIdx(fx32 x);
u16     FX_AcosIdx(fx32 x);

fx64c   FX_SinFx64c(fx32 rad);
fx64c   FX_CosFx64c(fx32 rad);

//----------------------------------------------------------------------------
// Implementation of inline function
//----------------------------------------------------------------------------

/*---------------------------------------------------------------------------*
  Name:         FX_SinIdx

  Description:  Obtain approximation of sine by table reference

  Arguments:    idx        treat (2 * pi / 65536) as 1

  Returns:      approximated sine value in fx16 format
 *---------------------------------------------------------------------------*/
SDK_INLINE fx16 FX_SinIdx(int idx)
{
    SDK_MINMAX_ASSERT(idx, 0, 65535);

    return FX_SinCosTable_[((idx >> 4) << 1)];
}

/*---------------------------------------------------------------------------*
  Name:         FX_CosIdx

  Description:  Obtain approximation of cosine by table reference

  Arguments:    idx        treat (2 * pi / 65536) as 1

  Returns:      approximated cosine value in fx16 format
 *---------------------------------------------------------------------------*/
SDK_INLINE fx16 FX_CosIdx(int idx)
{
    SDK_MINMAX_ASSERT(idx, 0, 65535);

    return FX_SinCosTable_[((idx >> 4) << 1) + 1];
}

#ifdef __cplusplus
}/* extern "C" */
#endif

#endif