private float ManualOctave(float _u, float _v, bool useUnityImp, bool expDis, float expBase)
{
float noiseVal = 0f;
foreach (var octaveData in Octaves)
{
float u = _u * octaveData.Frequency;
float v = _v * octaveData.Frequency;
noiseVal += (useUnityImp ? Mathf.PerlinNoise(u, v) : (float)PerlinNoise.Gen(u, v, 0, 0, expDis, expBase)) * octaveData.Amplitude;
}
return(noiseVal);
}
public float FBM(float _u, float _v, bool useUnityImp, bool expDis, float expBase)
{
float noiseVal = 0f;
float frequency = 1f, amplitude = 1f;
for (int i = 0; i < OctaveN; i++)
{
float u = _u * frequency;
float v = _v * frequency;
noiseVal += (useUnityImp ? Mathf.PerlinNoise(u, v) : (float)PerlinNoise.Gen(u, v, 0, 0, expDis, expBase)) * amplitude;
frequency *= FrequencyBase;
amplitude *= AmplitudeBase;
}
return(noiseVal);
}
public static float Gen2DNoiseByPerlin(Bounds b, Vector2 samplePoint, int octavesN, float frequencyBase, float amplitudeBase, bool useUnityImp = false, int randomOffsetSeed = 0, bool expDis = false, float expBase = 1f)
{
float noiseVal = 0f;
float frequency = 1f, amplitude = 1f;
float offsetX = b.size.x * samplePoint.x;
float offsetY = b.size.y * samplePoint.y;
for (int n = 0; n < octavesN; n++)
{
float u = (b.min.x + offsetX) * frequency;
float v = (b.min.y + offsetY) * frequency;
float rawNoiseVal = (useUnityImp ? Mathf.PerlinNoise(u, v) : (float)PerlinNoise.Gen(u, v, 0, 0, expDis, expBase)) * amplitude;
amplitude *= amplitudeBase;
frequency *= frequencyBase;
noiseVal += rawNoiseVal;
}
return(noiseVal);
}