public static Sprite ToSprite(Heightmap map)
{
var texture = ToTexture2D(map);
var rect = new Rect(0, 0, texture.width, texture.height);
return(Sprite.Create(texture, rect, Vector2.one * 0.5f));
}
public void Substract(Heightmap other)
{
for (int i = 0; i < Values.Length; i++)
{
Values[i] -= other.Values[i];
}
}
public void Add(Heightmap other)
{
for (int i = 0; i < Values.Length; i++)
{
Values[i] += other.Values[i];
}
}
private void SmoothAt(Heightmap smoothedMap, int x, int y, int weighting)
{
float sum = 0;
float count = 0;
for (int ySurroundings = y - 1; ySurroundings <= y + 1; ySurroundings++)
{
for (int xSurroundings = x - 1; xSurroundings <= x + 1; xSurroundings++)
{
if (!IsWithinBounds(xSurroundings, ySurroundings))
{
continue;
}
sum += GetAt(xSurroundings, ySurroundings);
count++;
}
}
sum += (weighting - 1) * GetAt(x, y);
count += weighting - 1;
float smoothedValue = sum / count;
smoothedMap.SetAt(x, y, smoothedValue);
}
public object Clone()
{
var clone = new Heightmap(Width, Height)
{
Values = Values.Clone() as float[]
};
return(clone);
}
public static Mesh ToMesh(Heightmap heightmap)
{
var mesh = new Mesh
{
vertices = GenerateVertices(heightmap),
triangles = GenerateTriangles(heightmap),
uv = GenerateUVs(heightmap)
};
mesh.RecalculateNormals();
return(mesh);
}
public void Smooth(int weighting = 1)
{
Heightmap smoothedMap = new Heightmap(Width, Height);
for (int y = 0; y < Height; y++)
{
for (int x = 0; x < Width; x++)
{
SmoothAt(smoothedMap, x, y, weighting);
}
}
Values = smoothedMap.Values;
}
private static Vector2[] GenerateUVs(Heightmap heightmap)
{
var uvs = new Vector2[heightmap.Values.Length];
int i = 0;
for (int y = 0; y < heightmap.Height; y++)
{
for (int x = 0; x < heightmap.Width; x++)
{
var uv = new Vector2((float)x / heightmap.Width, (float)y / heightmap.Width);
uvs[i++] = uv;
}
}
return(uvs);
}
public static Texture2D ToTexture2D(Heightmap heightmap)
{
var texture = new Texture2D(heightmap.Width, heightmap.Height, TextureFormat.ARGB32, false);
for (int y = 0; y < heightmap.Height; y++)
{
for (int x = 0; x < heightmap.Width; x++)
{
float value = heightmap.GetAt(x, y);
texture.SetPixel(x, heightmap.Height - y - 1, new Color(value, value, value));
}
}
texture.filterMode = FilterMode.Point;
texture.Apply();
return(texture);
}
private static Vector3[] GenerateVertices(Heightmap heightmap)
{
var vertices = new Vector3[heightmap.Values.Length];
int i = 0;
for (int y = 0; y < heightmap.Height; y++)
{
for (int x = 0; x < heightmap.Width; x++)
{
var vertice = new Vector3(x * DistanceBetweenVertices,
heightmap.GetAt(x, y) * MaxHeight,
y * DistanceBetweenVertices);
vertices[i++] = vertice;
}
}
return(vertices);
}
private static int[] GenerateTriangles(Heightmap heightmap)
{
var triangles = new int[(heightmap.Width - 1) * (heightmap.Height - 1) * 2 * 3];
int i = 0;
for (int y = 0; y < heightmap.Height - 1; y++)
{
for (int x = 0; x < heightmap.Width - 1; x++)
{
triangles[i++] = x + y * heightmap.Width;
triangles[i++] = x + y * heightmap.Width + heightmap.Width + 1;
triangles[i++] = x + y * heightmap.Width + 1;
triangles[i++] = x + y * heightmap.Width;
triangles[i++] = x + y * heightmap.Width + heightmap.Width;
triangles[i++] = x + y * heightmap.Width + heightmap.Width + 1;
}
}
return(triangles);
}
public static void ToFile(Heightmap heightmap, string path)
{
var texture = ToTexture2D(heightmap);
File.WriteAllBytes(path, texture.EncodeToPNG());
}
