Move source projects into source directory

source/MonoGame.Extended.Collisions/ISpaceAlgorithm.cs

@@ -0,0 +1,40 @@
+using System.Collections.Generic;
+
+namespace MonoGame.Extended.Collisions;
+
+/// <summary>
+/// Interface, which split space for optimization of collisions.
+/// </summary>
+public interface ISpaceAlgorithm
+{
+    /// <summary>
+    /// Inserts the actor into the space.
+    /// The actor will have its OnCollision called when collisions occur.
+    /// </summary>
+    /// <param name="actor">Actor to insert.</param>
+    void Insert(ICollisionActor actor);
+
+    /// <summary>
+    /// Removes the actor into the space.
+    /// </summary>
+    /// <param name="actor">Actor to remove.</param>
+    bool Remove(ICollisionActor actor);
+
+    /// <summary>
+    /// Removes the actor into the space.
+    /// The actor will have its OnCollision called when collisions occur.
+    /// </summary>
+    /// <param name="actor">Actor to remove.</param>
+    IEnumerable<ICollisionActor> Query(RectangleF boundsBoundingRectangle);
+
+    /// <summary>
+    /// for foreach
+    /// </summary>
+    /// <returns></returns>
+    List<ICollisionActor>.Enumerator GetEnumerator();
+
+    /// <summary>
+    /// Restructure the space with new positions.
+    /// </summary>
+    void Reset();
+}