__ATTR_PURE double billowGen( const double x
, const double y
, const double z
, const double freq
, const double lac
, const unsigned int octaveCount
, const double persistence
, const unsigned int seed
)
{
int currentOctv;
double value = 0.0;
double curPersistence = 1.0;
double sigx = x*freq;
double sigy = y*freq;
double sigz = z*freq;
for(currentOctv = 1; currentOctv <= octaveCount; currentOctv++)
{
value += gradientCoherentNoise(sigx, sigy, sigz, seed + currentOctv)
* curPersistence;
sigx = sigx * lac;
sigy = sigy * lac;
sigz = sigz * lac;
curPersistence = curPersistence * persistence;
}
value += 0.5;
return value;
}
__ATTR_PURE double perlinGen( double x
, double y
, double z
, double freq
, double lac
, int octaveCount
, double persistence, int seed)
{
int currentOctv;
double value = 0.0;
double curPersistence = 1.0;
double sigx = x*freq;
double sigy = y*freq;
double sigz = z*freq;
for(currentOctv = 1; currentOctv <= octaveCount; currentOctv++)
{
value += gradientCoherentNoise(sigx, sigy, sigz, seed + currentOctv) * curPersistence;
sigx = sigx * lac;
sigy = sigy * lac;
sigz = sigz * lac;
curPersistence = curPersistence * persistence;
}
return value;
/*
Just $ value $ V.foldr' octaveFunc (0.0, 1.0, x*freq, y*freq, z*freq) (V.generate (octaveCount-1) id)
where value (v,_,_,_,_) = v
signal sx sy sz octv = gradientCoherentNoise3D sx sy sz (seed + octv) q
octaveFunc curOctave (value, curPersistence, ox, oy, oz) =
( value + ( (signal ox oy oz (curOctave+1)) * curPersistence)
, curPersistence * p
, ox * lac
, oy * lac
, oz * lac
)
*/
}