void InitialiseTile(FogTile tile, int size, string name, Color[] pixels, Transform parent)
{
var renderer = this.GetComponent <SpriteRenderer> ();
Vector2 pivot = new Vector2(0.5f, 0.5f);
var rect = new Rect(0, 0, size, size);
tile.texture = new Texture2D(size, size);
tile.texture.SetPixels(0, 0, size, size, pixels);
tile.texture.filterMode = FilterMode.Bilinear;
tile.texture.wrapMode = TextureWrapMode.Clamp;
tile.texture.Apply();
tile.texture.name = "Fog Texture " + name;
tile.sprite = Sprite.Create(tile.texture, rect, pivot, renderer.sprite.pixelsPerUnit);
tile.sprite.name = "Fog Sprite" + name;
tile.obj = new GameObject();
tile.obj.name = "Fog" + name;
tile.obj.transform.parent = parent;
tile.obj.transform.localScale = new Vector3(tileSize, tileSize, 0.0f);
tile.obj.AddComponent <SpriteRenderer> ();
tile.renderer = tile.obj.GetComponent <SpriteRenderer> ();
tile.renderer.sprite = tile.sprite;
tile.renderer.name = "Fog Renderer " + name;
tile.renderer.sortingOrder = renderer.sortingOrder;
tile.renderer.sortingLayerName = renderer.sortingLayerName;
}
void RemoveFog(Vector2 playerPosition, FogTile tile, float scale, int dimensions, float minReveal, float maxReveal)
{
if (tile.pixels == null)
{
tile.pixels = tile.texture.GetPixels32();;
}
float pixelSize = scale / (float)dimensions;
float halfSize = scale / 2.0f;
Vector2 pixelPosition = new Vector2();
// Pixels start at bottom left corner and move upwards
Vector2 pixelStart = new Vector2(tile.obj.transform.position.x - halfSize,
tile.obj.transform.position.y - halfSize);
for (int r = 0; r < dimensions; ++r)
{
for (int c = 0; c < dimensions; ++c)
{
pixelPosition.x = pixelStart.x + (c * pixelSize);
pixelPosition.y = pixelStart.y + (r * pixelSize);
float distance = Vector2.Distance(pixelPosition, playerPosition);
if (distance <= maxRevealRadius)
{
byte alpha = (byte)Mathf.Clamp(ConvertRange(distance,
minReveal, maxReveal, 0.0f, 255.0f), 0.0f, 255.0f);
var pixelIndex = r * dimensions + c;
if (tile.pixels[pixelIndex].a > alpha)
{
tile.pixels[pixelIndex].a = alpha;
}
}
}
}
tile.texture.SetPixels32(tile.pixels);
tile.texture.Apply();
}
