procutil.h

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#ifndef PROCUTIL_H
#define PROCUTIL_H

#include "basetype.h"
#include "bitmap.h"
#include <math.h>

#ifdef __cplusplus
extern "C" {
#endif

#ifdef PI
#undef PI
#endif
#ifdef TWO_PI
#undef TWO_PI
#endif

#define PI                                                      (3.14159265359f)
#define PI_OVER_2                                       (1.570796326795f)
#define TWO_PI                                          (6.28318530718f)
#define PI_OVER_180                                     (0.01745329251994f)
#define RAD_TO_DEG                                      (57.29577951308f)       //180_over_pi
#define ONE_OVER_360                            (0.002777777777778f)

#define ProcUtil_Deg2Rad(a)     ((a) * PI_OVER_180)
#define ProcUtil_Rad2Deg(a) ((a) * RAD_TO_DEG)

#define TABLE_SHIFT                                     (10)
#define TABLE_SIZE                                      ((1UL)<<TABLE_SHIFT)
#define TABLE_MASK                                      (TABLE_SIZE - 1)

#define TABLE_SIZE_OVER_TWO_PI          ((float)TABLE_SIZE / TWO_PI)

/****** you must call _Init before using ProcUtil functions ***/

void ProcUtil_Init(void);

/****** Stuff ***/

geBoolean ProcUtil_SetPaletteFromString(geBitmap * Bitmap,char ** pParams);

/*** fast Rand() utilities *****/

extern void             ProcUtil_Randomize( void );
extern uint32   ProcUtil_Rand( uint32 max );

#define ProcUtil_RandSigned(max)                        ( ProcUtil_Rand(max+max+1) - (max) )
#define ProcUtil_RandUnitFloat()                        ( ProcUtil_Rand(13729) * (1.0f/13729.0f))
#define ProcUtil_RandFloat(max)                         ( max * ProcUtil_RandUnitFloat())
#define ProcUtil_RandSignedUnitFloat()          ( ProcUtil_RandSigned(13729) * (1.0f/13729.0f))
#define ProcUtil_RandSignedFloat(max)           ( max * ProcUtil_RandSignedUnitFloat())

/*** fast Sin/Cos with tables *****/

extern float ProcUtil_SinTable[];
extern float ProcUtil_CosTable[];
extern int   ProcUtil_ByteSinTable[];
extern int   ProcUtil_ByteCosTable[];

#define ProcUtil_Sin(a) ( ProcUtil_SinTable[((int)((a) * TABLE_SIZE_OVER_TWO_PI) + (1UL<<20)) & TABLE_MASK] )
#define ProcUtil_Cos(a) ( ProcUtil_CosTable[((int)((a) * TABLE_SIZE_OVER_TWO_PI) + (1UL<<20)) & TABLE_MASK] )

#define ProcUtil_ByteSin(a)     ( ProcUtil_ByteSinTable[(int)((a) + (1UL<<20)) & 0xFF] )
#define ProcUtil_ByteCos(a)     ( ProcUtil_ByteCosTable[(int)((a) + (1UL<<20)) & 0xFF] )

/******* __inline functions ****************/

float __inline ProcUtil_Sqrt(float val)
{
        __asm {
                FLD val
                FSQRT
                FSTP val
        }
return val;
}

#ifdef __cplusplus
}
#endif

#endif

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