public TextureCoordinateRect TileAreaForCardinalDirection(IntDimension ts, CardinalIndex dir)
{
var w = ts.Width;
var h = ts.Height;
var wHalf = ts.Width / 2;
var hHalf = ts.Height / 2;
switch (dir)
{
case CardinalIndex.West:
return(new TextureCoordinateRect(0, 0, wHalf, hHalf));
case CardinalIndex.North:
return(new TextureCoordinateRect(wHalf, 0, w - wHalf, hHalf));
case CardinalIndex.East:
return(new TextureCoordinateRect(wHalf, hHalf, w - wHalf, h - hHalf));
case CardinalIndex.South:
return(new TextureCoordinateRect(0, hHalf, wHalf, h - hHalf));
default:
throw new ArgumentException();
}
}
bool TryFindSourceMask(CardinalIndex dir, out BoundedTextureData <TColor> colorData, out IntPoint anchor)
{
var idx = (int)dir;
var ce = maskCache[idx];
colorData = ce.ColorData;
anchor = ce.Anchor;
return(ce.Exists);
}
public bool TryGenerate(string tag, CardinalIndex direction, out TTile tile)
{
var etag = $"{prefix}{tag}_{direction}";
if (tileRegistry.TryFind(etag, out var predefined))
{
tile = predefined;
return(true);
}
var sourceArea = textureOperations.TileAreaForCardinalDirection(tileSize, direction);
if (!TryFindSourceMask(direction, out var effectiveMask, out var anchor))
{
tile = default;
return(false);
}
if (!tileRegistry.TryFind(tag, out var terrain) ||
!terrain.HasTexture)
{
tile = default;
return(false);
}
var data = textureOperations.ExtractData(terrain.Texture, sourceArea);
var result = textureOperations.CombineMask(data, effectiveMask);
var wrappedTextureSize = new IntDimension(tileSize.Width, tileSize.Height);
var wrappedTexture = textureOperations.CreateTexture(etag, wrappedTextureSize);
textureOperations.ApplyTextureData(wrappedTexture, result, sourceArea.Origin);
tile = tileProducer.Produce(tileSize, anchor, etag, wrappedTexture);
return(true);
}
CacheEntry CacheTryFindSourceMask(CardinalIndex dir)
{
if (cardinalMaskRegistry.TryFind("mask.blending", dir, out var providedTile) &&
providedTile.HasTexture)
{
return(new CacheEntry(true,
textureOperations.ExtractData(providedTile.Texture, providedTile.Texture.Bounds),
providedTile.Anchor));
}
var sourceArea = textureOperations.TileAreaForCardinalDirection(tileSize, dir);
if (renderType.IsIsometric())
{
if (ditherMask.HasTexture)
{
return(new CacheEntry(true,
textureOperations.ExtractData(ditherMask.Texture, sourceArea),
ditherMask.Anchor));
}
}
return(new CacheEntry(false, null, default));
}
public static int AsInt(this CardinalIndex c)
{
return((int)c);
}
public bool TryFind(string tag, CardinalIndex selector, out TRenderTile tile)
{
return(baseRegistry.TryFind(string.Format(CultureInfo.InvariantCulture, format, tag, suffixMapping.Lookup(selector).Tag), out tile));
}