feat: basic MonoGame integration implementations added

Engine.Integration/Engine.Integration.MonoGame/Behaviours/TriangleBatcher.cs

@@ -0,0 +1,38 @@
+using System.Collections.Generic;
+
+using Microsoft.Xna.Framework;
+
+using Syntriax.Engine.Core;
+
+namespace Syntriax.Engine.Integration.MonoGame;
+
+public class TriangleBatcher : BehaviourBase, ITriangleBatch, IFirstFrameUpdate, IDraw
+{
+    private static Comparer<IBehaviour> SortByAscendingPriority() => Comparer<IBehaviour>.Create((x, y) => x.Priority.CompareTo(y.Priority));
+
+    private TriangleBatch triangleBatch = null!;
+    private MonoGameCamera2DBehaviour camera2D = null!;
+    private readonly ActiveBehaviourCollectorSorted<IDrawableTriangle> drawableShapes = new() { SortBy = SortByAscendingPriority() };
+
+    public void FirstActiveFrame()
+    {
+        MonoGameWindowContainer windowContainer = BehaviourController.UniverseObject.Universe.FindRequiredBehaviour<MonoGameWindowContainer>();
+        camera2D = BehaviourController.UniverseObject.Universe.FindRequiredBehaviour<MonoGameCamera2DBehaviour>();
+
+        triangleBatch = new(windowContainer.Window.GraphicsDevice);
+        drawableShapes.Unassign();
+        drawableShapes.Assign(BehaviourController.UniverseObject.Universe);
+    }
+
+    public void Draw()
+    {
+        triangleBatch.Begin(camera2D.MatrixTransform);
+        for (int i = 0; i < drawableShapes.Count; i++)
+            drawableShapes[i].Draw(triangleBatch);
+        triangleBatch.End();
+    }
+
+    public void Begin(Matrix? view = null, Matrix? projection = null) => triangleBatch.Begin(view, projection);
+    public void Draw(Triangle triangle, ColorRGBA colorRGBA) => triangleBatch.Draw(triangle, colorRGBA);
+    public void End() => triangleBatch.End();
+}