1 files changed, 48 insertions, 0 deletions
diff --git a/Plugins/MonoGame.Extended/source/MonoGame.Extended.Entities/Aspect.cs b/Plugins/MonoGame.Extended/source/MonoGame.Extended.Entities/Aspect.cs
new file mode 100644
index 0000000..e6fb606
--- /dev/null
+++ b/Plugins/MonoGame.Extended/source/MonoGame.Extended.Entities/Aspect.cs
@@ -0,0 +1,48 @@
+using System;
+using System.Collections.Specialized;
+
+namespace MonoGame.Extended.Entities
+{
+    public class Aspect
+    {
+        internal Aspect()
+        {
+            AllSet = new BitVector32();
+            ExclusionSet = new BitVector32();
+            OneSet = new BitVector32();
+        }
+
+        public BitVector32 AllSet;
+        public BitVector32 ExclusionSet;
+        public BitVector32 OneSet;
+
+        public static AspectBuilder All(params Type[] types)
+        {
+            return new AspectBuilder().All(types);
+        }
+
+        public static AspectBuilder One(params Type[] types)
+        {
+            return new AspectBuilder().One(types);
+        }
+
+        public static AspectBuilder Exclude(params Type[] types)
+        {
+            return new AspectBuilder().Exclude(types);
+        }
+
+        public bool IsInterested(BitVector32 componentBits)
+        {
+            if (AllSet.Data != 0 && (componentBits.Data & AllSet.Data) != AllSet.Data)
+                return false;
+
+            if (ExclusionSet.Data != 0 && (componentBits.Data & ExclusionSet.Data) != 0)
+                return false;
+
+            if (OneSet.Data != 0 && (componentBits.Data & OneSet.Data) == 0)
+                return false;
+
+            return true;
+        }
+    }
+}
+\ No newline at end of file