Noise

gistfile1.cpp

float discreteNoise( uint32 x )
{
uint32 t;
  x=(x<<13)^x;
  t = x*790169+x*x*x*15731 + 1376312588;
  return (float)( 1.0-(t%1073741824)/536870912.0 );
}

float discreteNoise(uint32 x,uint32 y )
{
uint32 t;
  x=(x<<13)^x;
  y=(y<<13)^y;
  t = x*790169+x*x*x*15731
    +  y*789221+y*y*y*16057
    + x*y*209123
    + 1376312588;
  return (float)( 1.0-(t%1073741824)/536870912.0 );
}

float discreteNoise(uint32 x,uint32 y, uint32 z )
{
uint32 t;
  x=(x<<13)^x;
  y=(y<<13)^y;
  z=(z<<13)^z;
  t = x*790169+x*x*x*15731
    +  y*789221+y*y*y*16057
    +  z*788317+z*z*z*15401
    + x*y*209123
    + y*z*209581
    + x*z*208501
    + x*y*z*15749
    + 1376312588;
  return (float)( 1.0-(t%1073741824)/536870912.0 );
}