private static float GetHeightAt(Config cfg, Cubemap heightMap, Vector3 radiusVector)
{
Color pixel = CubemapProjections.ReadPixel(heightMap, radiusVector);
// Altitude above water level
float heightDelta = pixel.r * (cfg.oceanDepth + cfg.mountainHeight) - cfg.oceanDepth;
return(cfg.radius + heightDelta);
}
private static Cubemap GenerateHeightmap(Config cfg)
{
Random.State savedState = Random.state;
int size = cfg.heightCubemapSize;
Cubemap heightMap = new Cubemap(size, TextureFormat.RGB24, false);
// Pixels are laid out right to left, top to bottom
Color[] pixels = new Color[size * size];
Color pixel = new Color();
var generator = new LibNoise.Generator.Perlin();
generator.Frequency = cfg.noiseScale;
generator.OctaveCount = cfg.octaves;
generator.Seed = cfg.seed;
foreach (CubemapFace face in System.Enum.GetValues(typeof(CubemapFace)))
{
if (face == CubemapFace.Unknown)
{
continue;
}
for (int y = 0; y < size; ++y)
{
for (int x = 0; x < size; ++x)
{
Vector2 uv = new Vector2((float)x / (size - 1), (float)y / (size - 1));
Vector3 radiusVec = CubemapProjections.GetRadiusVectorFromFace(face, uv);
/*pixel.r = (radius.x + 1) * 0.5f;
* pixel.g = (radius.y + 1) * 0.5f;
* pixel.b = (radius.z + 1) * 0.5f;*/
float height = (float)generator.GetValue(radiusVec * cfg.radius);
height = (height + 1) * 0.5f;
pixel.r = pixel.g = pixel.b = height;
pixels[x + y * size] = pixel;
}
}
heightMap.SetPixels(pixels, face);
heightMap.Apply();
}
Random.state = savedState;
return(heightMap);
}