From dd3c3cfc30dc49eb45af0ef7fd6ec8730b4d06e6 Mon Sep 17 00:00:00 2001
From: Ellpeck <megamaximal@gmail.com>
Date: Tue, 6 Aug 2019 22:31:57 +0200
Subject: [PATCH] added simple auto tiling

---
 MLEM/MLEM.csproj        |  2 +-
 MLEM/Misc/AutoTiling.cs | 30 ++++++++++++++++++++++++++++++
 2 files changed, 31 insertions(+), 1 deletion(-)
 create mode 100644 MLEM/Misc/AutoTiling.cs

diff --git a/MLEM/MLEM.csproj b/MLEM/MLEM.csproj
index 85e0002..b32cf5a 100644
--- a/MLEM/MLEM.csproj
+++ b/MLEM/MLEM.csproj
@@ -10,7 +10,7 @@
         <PackageProjectUrl>https://github.com/Ellpeck/MLEM</PackageProjectUrl>
         <RepositoryUrl>https://github.com/Ellpeck/MLEM</RepositoryUrl>
         <PackageLicenseUrl>https://github.com/Ellpeck/MLEM/blob/master/LICENSE</PackageLicenseUrl>
-        <Version>1.0.5</Version>
+        <Version>1.0.6</Version>
     </PropertyGroup>
 
     <ItemGroup>
diff --git a/MLEM/Misc/AutoTiling.cs b/MLEM/Misc/AutoTiling.cs
new file mode 100644
index 0000000..ff4de86
--- /dev/null
+++ b/MLEM/Misc/AutoTiling.cs
@@ -0,0 +1,30 @@
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+
+namespace MLEM.Misc {
+    public class AutoTiling {
+
+        public static void DrawAutoTile(SpriteBatch batch, Vector2 pos, Texture2D texture, Rectangle textureRegion, ConnectsTo connectsTo, Color color) {
+            var up = connectsTo(0, -1);
+            var down = connectsTo(0, 1);
+            var left = connectsTo(-1, 0);
+            var right = connectsTo(1, 0);
+
+            var xUl = up && left ? connectsTo(-1, -1) ? 0 : 4 : left ? 1 : up ? 3 : 2;
+            var xUr = up && right ? connectsTo(1, -1) ? 0 : 4 : right ? 1 : up ? 3 : 2;
+            var xDl = down && left ? connectsTo(-1, 1) ? 0 : 4 : left ? 1 : down ? 3 : 2;
+            var xDr = down && right ? connectsTo(1, 1) ? 0 : 4 : right ? 1 : down ? 3 : 2;
+
+            var (x, y) = pos;
+            var (sizeX, sizeY) = textureRegion.Size;
+            var (halfSizeX, halfSizeY) = new Point(sizeX / 2, sizeY / 2);
+            batch.Draw(texture, new Vector2(x, y), new Rectangle(textureRegion.X + 0 + xUl * sizeX, textureRegion.Y + 0, sizeX, sizeY), color);
+            batch.Draw(texture, new Vector2(x + 0.5F * sizeX, y), new Rectangle(textureRegion.X + halfSizeX + xUr * sizeX, textureRegion.Y + 0, sizeX, sizeY), color);
+            batch.Draw(texture, new Vector2(x, y + 0.5F * sizeY), new Rectangle(textureRegion.X + xDl * sizeX, textureRegion.Y + halfSizeY, sizeX, sizeY), color);
+            batch.Draw(texture, new Vector2(x + 0.5F * sizeX, y + 0.5F * sizeY), new Rectangle(textureRegion.X + halfSizeX + xDr * sizeX, textureRegion.Y + halfSizeY, sizeX, sizeY), color);
+        }
+
+        public delegate bool ConnectsTo(int xOff, int yOff);
+
+    }
+}
\ No newline at end of file