public static float[,] GenerateNoiseMapMatrix(HeightSettings heightSettings)
{
(int dimensionLength,
int seed,
float scale,
int octaves,
float persistence,
float lacunarity,
Vector2 offset) = heightSettings.ToTuple();
float[,] noiseMap = new float[dimensionLength, dimensionLength];
System.Random prng = new System.Random(seed);
Vector2[] octaveOffsets = new Vector2[octaves];
float maxPossibleHeight = 0;
float amplitude = 1;
float frequency = 1;
for (int i = 0; i < octaves; i++)
{
float offsetX = prng.Next(-100000, 100000) + offset.x;
float offsetY = prng.Next(-100000, 100000) - offset.y;
octaveOffsets[i] = new Vector2(offsetX, offsetY);
maxPossibleHeight += amplitude;
amplitude *= persistence;
}
float maxLocalNoiseHeight = float.MinValue;
float minLocalNoiseHeight = float.MaxValue;
float halfWidth = dimensionLength / 2f;
float halfHeight = dimensionLength / 2f;
for (int y = 0; y < dimensionLength; y++)
{
for (int x = 0; x < dimensionLength; x++)
{
amplitude = 1;
frequency = 1;
float noiseHeight = 0;
for (int i = 0; i < octaves; i++)
{
float sampleX = (x - halfWidth + octaveOffsets[i].x) / scale * frequency;
float sampleY = (y - halfHeight + octaveOffsets[i].y) / scale * frequency;
float perlinValue = Mathf.PerlinNoise(sampleX, sampleY) * 2 - 1;
noiseHeight += perlinValue * amplitude;
amplitude *= persistence;
frequency *= lacunarity;
}
if (noiseHeight > maxLocalNoiseHeight)
{
maxLocalNoiseHeight = noiseHeight;
}
if (noiseHeight < minLocalNoiseHeight)
{
minLocalNoiseHeight = noiseHeight;
}
noiseMap[x, y] = noiseHeight;
/*if (settings.normalizeMode == NormalizeMode.Global) {
* float normalizedHeight = (noiseMap [x, y] + 1) / (maxPossibleHeight / 0.9f);
* noiseMap [x, y] = Mathf.Clamp (normalizedHeight, 0, int.MaxValue);
* }*/
}
}
//if (settings.normalizeMode == NormalizeMode.Local) {
for (int y = 0; y < dimensionLength; y++)
{
for (int x = 0; x < dimensionLength; x++)
{
noiseMap[x, y] = Mathf.InverseLerp(minLocalNoiseHeight, maxLocalNoiseHeight, noiseMap[x, y]);
}
}
//}
return(noiseMap);
}
public void LoadWorldResources()
{
m_HeightSettings = Resources.Load <HeightSettings>($"Worlds/{world.ToString()}/{world.ToString()}Height");
m_TerrainSettings = Resources.Load <TerrainSettings>($"Worlds/{world.ToString()}/{world.ToString()}Terrain");
m_FoliageSettings = Resources.Load <FoliageSettings>($"Worlds/{world.ToString()}/{world.ToString()}Foliage");
}
