add unity project

add SOLID examples

SOLID/Assets/Scripts/Solid/RectangleAreaOfEffect.cs

@@ -0,0 +1,17 @@
+using UnityEngine;
+
+namespace DefaultNamespace.Solid
+{
+    public class RectangleAreaOfEffect : AreaOfEffect
+    {
+        [SerializeField] private float _width;
+        [SerializeField] private float _height;
+
+        protected override bool IsInsideOfEffectArea(Collision other)
+        {
+            // do some calculations
+
+            return false;
+        }
+    }
+}