/// <summary>
/// パーリンノイズ用のグリッドを生成する
/// </summary>
/// <returns></returns>
private int[] CreateGrid()
{
int[] p = new int[256];
for (int i = 0; i < p.Length; i++)
{
p[i] = (int)Mathf.Floor(_xorshift.Random() * 256);
}
int[] p2 = new int[512];
for (int i = 0; i < p2.Length; i++)
{
p2[i] = p[i & 255];
}
return(p2);
}
/// <summary>
/// パーリンノイズ用のグリッドを生成する
/// </summary>
/// <returns></returns>
static public int[] CreateGrid(int seed)
{
Xorshift xorshift = new Xorshift((uint)seed);
int[] p = new int[256];
for (int i = 0; i < p.Length; i++)
{
p[i] = (int)Mathf.Floor(xorshift.Random() * 256);
}
int[] p2 = new int[512];
for (int i = 0; i < p2.Length; i++)
{
p2[i] = p[i & 255];
}
return(p2);
}
public PerlinNoise(uint seed)
{
_xorshift = new Xorshift(seed);
int[] p = new int[256];
for (int i = 0; i < p.Length; i++)
{
p[i] = (int)Mathf.Floor(_xorshift.Random() * 256);
}
int[] p2 = new int[512];
for (int i = 0; i < p2.Length; i++)
{
p2[i] = p[i & 255];
}
_p = p2;
}
/// <summary>
/// Constructor
/// </summary>
public PerlinNoise(uint seed)
{
_xorshit = new Xorshift(seed);
int[] p = new int[256];
for (int i = 0; i < p.Length; i++)
{
// 0 - 255の間のランダムな値を生成する
p[i] = (int)Mathf.Floor(_xorshit.Random() * 256);
}
// pの倍の数の配列を生成する
int[] p2 = new int[p.Length * 2];
for (int i = 0; i < p2.Length; i++)
{
p2[i] = p[i & 255];
}
_p = p2;
}