public static Texture2D CreateClipMask(InterpolatedArray2f heightMap, int width, int height, float shoreLevel, TextureFormat format)
{
Texture2D mask = new Texture2D(width, height, format, false, true);
mask.filterMode = FilterMode.Bilinear;
Color[] colors = new Color[width * height];
bool matches = width == heightMap.SX && height == heightMap.SY;
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
int i = x + y * height;
float h = 0.0f;
if (matches)
{
h = Mathf.Clamp(heightMap.Data[i] - shoreLevel, 0.0f, 1.0f);
}
else
{
float fx = x / (width - 1.0f);
float fy = y / (height - 1.0f);
h = Mathf.Clamp(heightMap.Get(fx, fy, 0) - shoreLevel, 0.0f, 1.0f);
}
if (h > 0.0f) h = 1.0f;
colors[i].r = h;
colors[i].g = h;
colors[i].b = h;
colors[i].a = h;
}
}
mask.SetPixels(colors);
mask.Apply();
return mask;
}
