/// 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; } }