3d_fastmath.cpp File Reference

#include "3d_fastmath.h"

Go to the source code of this file.

Functions
float	Fast_RandFloat ()
int	Fast_rand (void)
void	Fast_srand (unsigned int seed)

Variables
static int	s_randSeed = 1
static unsigned long int	s_nextRandSeed = 1

Function Documentation

Fast_rand()

int Fast_rand

(

void

)

Definition at line 58 of file 3d_fastmath.cpp.

{
 s_nextRandSeed = s_nextRandSeed * 1103515245 + 12345;
 
 return (unsigned int)(s_nextRandSeed >> 16) & 0x7FFF;
}

References s_nextRandSeed.

Referenced by POST_SHADER_SSAO::Shade().

Fast_RandFloat()

float Fast_RandFloat

(

)

Definition at line 45 of file 3d_fastmath.cpp.

{
 s_randSeed *= 16807;
 
 return (float)s_randSeed * 4.6566129e-010f;
}

References s_randSeed.

Referenced by RAYPACKET::RAYPACKET(), RAYPACKET_InitRays_with2DDisplacement(), and UniformRandomHemisphereDirection().

Fast_srand()

void Fast_srand

(

unsigned int

seed

)

Definition at line 65 of file 3d_fastmath.cpp.

{
 s_nextRandSeed = seed;
}

References s_nextRandSeed.

Variable Documentation

s_nextRandSeed

unsigned long int s_nextRandSeed = 1

static

Definition at line 56 of file 3d_fastmath.cpp.

Referenced by Fast_rand(), and Fast_srand().

s_randSeed

int s_randSeed = 1

static

Definition at line 41 of file 3d_fastmath.cpp.

Referenced by Fast_RandFloat().