double perlinNoise(double x,double y)
{
double floorx=(double)((int)x);//This is kinda a cheap way to floor a double integer.
double floory=(double)((int)y);
double s,t,u,v;//Integer declaration
s=findnoise(floorx,floory);
t=findnoise(floorx+1,floory);
u=findnoise(floorx,floory+1);//Get the surrounding pixels to calculate the transition.
v=findnoise(floorx+1,floory+1);
double int1=interpolate(s,t,x-floorx);//Interpolate between the values.
double int2=interpolate(u,v,x-floorx);//Here we use x-floorx, to get 1st dimension. Don't mind the x-floorx thingie, it's part of the cosine formula.
return interpolate(int1,int2,y-floory);//Here we use y-floory, to get the 2nd dimension.
}
double PerlinNoise::noise(const double x, const double y, const int z)
{
double floorx=(double)((int)x);
double floory=(double)((int)y);
double s,t,u,v;
s=findnoise(floorx, floory, z);
t=findnoise(floorx+1, floory, z);
u=findnoise(floorx, floory+1, z);
v=findnoise(floorx+1, floory+1, z);
double int1=interpolate(s, t, x-floorx);
double int2=interpolate(u, v, x-floorx);
return interpolate(int1, int2, y-floory);
}
