/// Constructs the noise function but doesn't generate anything. For details on the parameters see
/// http://freespace.virgin.net/hugo.elias/models/m_perlin.htm .
public e2dPerlinNoise(int octaves, float amplitude, int frequency, float persistence)
{
mOctavesCount = octaves;
// checks
if (frequency < 2)
{
e2dUtils.Error("Perlin Frequency must be at least 2");
frequency = 2;
}
if (amplitude <= 0)
{
e2dUtils.Error("Perlin Amplitude must be bigger then 0");
amplitude = 0.1f;
}
if (mOctavesCount < 1)
{
e2dUtils.Warning("Perlin Octaves Count must be at least 1");
mOctavesCount = 1;
}
// init the octaves
int octaveFrequency = frequency;
float octaveAmplitude = amplitude;
mOctaves = new e2dPerlinOctave[mOctavesCount];
for (int i = 0; i < mOctavesCount; i++)
{
mOctaves[i] = new e2dPerlinOctave(octaveAmplitude, octaveFrequency);
octaveAmplitude *= persistence;
octaveFrequency *= 2;
}
}
/// Constructs the noise function but doesn't generate anything. For details on the parameters see
/// http://freespace.virgin.net/hugo.elias/models/m_perlin.htm .
public e2dPerlinNoise(int octaves, float amplitude, int frequency, float persistence)
{
mOctavesCount = octaves;
// checks
if (frequency < 2)
{
e2dUtils.Error("Perlin Frequency must be at least 2");
frequency = 2;
}
if (amplitude <= 0)
{
e2dUtils.Error("Perlin Amplitude must be bigger then 0");
amplitude = 0.1f;
}
if (mOctavesCount < 1)
{
e2dUtils.Warning("Perlin Octaves Count must be at least 1");
mOctavesCount = 1;
}
// init the octaves
int octaveFrequency = frequency;
float octaveAmplitude = amplitude;
mOctaves = new e2dPerlinOctave[mOctavesCount];
for (int i = 0; i < mOctavesCount; i++)
{
mOctaves[i] = new e2dPerlinOctave(octaveAmplitude, octaveFrequency);
octaveAmplitude *= persistence;
octaveFrequency *= 2;
}
}
