public PerlinNoise2D(uint m, uint n, byte count = 4, float maxAmpl = 1)
{
Debug.Assert(m >= count);
uint newM = _DownTo2Based(m);
uint newN = _DownTo2Based(n);
_scaleX = (float)newM / (float)m;
_scaleY = (float)newN / (float)n;
_octaves = new CoherentNoise2D[count];
uint freqX = newM / count;
uint freqY = newN / count;
for (uint i = 0; i < count; i++)
{
m = freqX * (i + 1);
n = freqY * (i + 1);
_octaves[i] = new CoherentNoise2D(m, n);
}
_amplitude = maxAmpl;
}
/// <summary>
/// 长宽最好为2^n+1
/// <param name="minFreq">x方向最小倍频</param>
/// </summary>
public PerlinNoise2D(uint m, uint n, uint minFreq, float maxAmpl = 1)
{
// 缩放到标准2^n
minFreq = _DownTo2Based(minFreq);
uint newM = _DownTo2Based(m);
uint newN = _DownTo2Based(n);
_scaleX = (float)newM / (float)m;
_scaleY = (float)newN / (float)n;
_octaves = new CoherentNoise2D[newM / minFreq];
uint freqX = minFreq;
uint freqY = minFreq * newN / newM;
// 不同频率的相关噪声
for (uint i = 0; i < newM / minFreq; i++)
{
m = freqX * (i + 1);
n = freqY * (i + 1);
_octaves[i] = new CoherentNoise2D(m, n);
}
_amplitude = maxAmpl;
}
public PerlinNoise2D(uint m, uint n, byte count = 4, float maxAmpl = 1)
{
Debug.Assert(m >= count);
uint newM = _DownTo2Based(m);
uint newN = _DownTo2Based(n);
_scaleX = (float)newM / (float)m;
_scaleY = (float)newN / (float)n;
_octaves = new CoherentNoise2D[count];
uint freqX = newM / count;
uint freqY = newN / count;
for (uint i = 0; i < count; i++)
{
m = freqX * (i + 1);
n = freqY * (i + 1);
_octaves[i] = new CoherentNoise2D(m, n);
}
_amplitude = maxAmpl;
}
/// <summary>
/// �������Ϊ2^n+1
/// <param name="minFreq">x������С��Ƶ</param>
/// </summary>
public PerlinNoise2D(uint m, uint n, uint minFreq, float maxAmpl = 1)
{
// ���ŵ���2^n
minFreq = _DownTo2Based(minFreq);
uint newM = _DownTo2Based(m);
uint newN = _DownTo2Based(n);
_scaleX = (float)newM / (float)m;
_scaleY = (float)newN / (float)n;
_octaves = new CoherentNoise2D[newM / minFreq];
uint freqX = minFreq;
uint freqY = minFreq * newN / newM;
// ��ͬƵ�ʵ��������
for (uint i = 0; i < newM / minFreq; i++)
{
m = freqX * (i + 1);
n = freqY * (i + 1);
_octaves[i] = new CoherentNoise2D(m, n);
}
_amplitude = maxAmpl;
}
