Invoke on collision enter + start of attach child colliders to rigidbody

+ Changed default Namespace of ScriptCore to GlitchyEngine
+ Implicit Casts float2 <-> b2Vec2
+ Entity constructor internal
+ Renamed RigidBody2D to Rigidbody2D (notice the B)
+ Basic Debug Draw actual 2D Colliders
+ Added Entity::GetParentWithComponent

ScriptCore/Components/RigidBody2D.cs

@@ -2,7 +2,7 @@ using GlitchyEngine.Math;
 
 namespace GlitchyEngine;
 
-public class RigidBody2D : Component
+public class Rigidbody2D : Component
 {
     /// <summary>
     /// Apply a force at a world point.

ScriptCore/Entity.cs

@@ -15,17 +15,13 @@ internal struct EntityHandle
 
 public class Entity : EngineObject
 {
-    //private UUID _uuid;
-
-    //public UUID UUID => _uuid;
-
     /// <summary>
     /// Empty constructor not used. Do NOT USE!
     /// </summary>
     protected Entity()
     { }
 
-    private Entity(UUID uuid)
+    internal Entity(UUID uuid)
     {
         _uuid = uuid;
     }

ScriptCore/Physics/Collision2D.cs

@@ -0,0 +1,35 @@
+using System.Runtime.InteropServices;
+using GlitchyEngine.Core;
+
+namespace GlitchyEngine.Physics;
+
+[StructLayout(LayoutKind.Sequential, Pack=1)]
+public struct Collision2D
+{
+    private UUID _entity;
+    private UUID _otherEntity;
+
+    private UUID _rigidbody;
+    private UUID _otherRigidbody;
+
+    /// <summary>
+    /// Gets the Entity whose Collider takes part in the collision.
+    /// This entity is either the entity of the script instance receiving the event or a child of it.
+    /// </summary>
+    public Entity Entity => new(_entity);
+    /// <summary>
+    /// Gets the other Entity whose collider takes part in the collision.
+    /// </summary>
+    public Entity OtherEntity => new(_otherEntity);
+
+    /// <summary>
+    /// Gets the rigidbody whose Collider takes part in the collision.
+    /// This Rigidbody is either a component of the entity whose script instance received the event or a parent of it.
+    /// </summary>
+    public Rigidbody2D Rigidbody => new() { Entity = Entity };
+
+    /// <summary>
+    /// Gets the other rigidbody whose Collider takes part in the collision.
+    /// </summary>
+    public Rigidbody2D OtherRigidbody => new() { Entity = OtherEntity };
+}

ScriptCore/ScriptCore.csproj

@@ -5,6 +5,7 @@
 	  <LangVersion>latest</LangVersion>
 	  <BaseOutputPath></BaseOutputPath>
 	  <EmitCompilerGeneratedFiles>true</EmitCompilerGeneratedFiles>
+	  <RootNamespace>GlitchyEngine</RootNamespace>
   </PropertyGroup>
 
   <Target Name="PostBuild" AfterTargets="PostBuildEvent">