void PerlinNoiseCache::Cache(int cx, int cy)
{
ASSERT(cx >= 1 && cy >= 1);
Clear();
sz = Size(cx, cy);
InitNoise();
int xycnt = cx *cy;
cache.Alloc(xycnt);
float *q = ~cache;
for (int y = 0; y < sz.cy; y++)
for (int x = 0; x < sz.cx; x++, q++)
*q = PerlinNoise2D(x, y);
DeinitNoise();
}
void perlin(int low, int high, int type)
{
int x, y, z, i;
int level = (high + low)/2;
int scale = level - low;
for(x = 0; x <= WORLDX; x++)
{
for(z = 0; z < WORLDZ; z++)
{
/* Give it small x/z values to increase smoothness; 2 octaves is enough */
y = level + (scale * PerlinNoise2D(x/47.0, z/47.0, 2, 2, 2));
/* Have to keep the result safely inside the boundaries of the earth. */
y = bounds(y, 0, WORLDY-1);
for(i = y; world[x][i][z] == EMPTY; i--)
{
world[x][i][z] = type;
}
}
}
}
int getSandHeight(int x, int y){
float NoiseHeight = PerlinNoise2D(x / NoiseScaleX * 3 + 1222, y / NoiseScaleZ * 3 + 1222) / 4.0f - 2;
return int(NoiseHeight);
}
int getHeight(int x, int y){
float NoiseHeight = PerlinNoise2D(x / NoiseScaleX, y / NoiseScaleZ) / 4.0f;
return int(NoiseHeight);
}
real PerlinGenerator::mountainHeight( real u, real v )
{
//return PerlinNoise2D( u, v, persistence, lacunarity, octaves ) ;
return PerlinNoise2D( u, v, 2, 2, 4 ) ;
}
//======================================================================================
//======================================================================================
double PNoise::PNoise2D(double x, double y)
{
return PerlinNoise2D(x, y, _n, _alpha, _beta);
}
