Add pivot offset for rotations.

DaggerFramework/Source/Rendering/RaylibRenderer.cs

@@ -78,9 +78,10 @@ namespace DaggerFramework.Rendering
             Raylib.DrawCircle((int)_position.X, (int)_position.Y, radius, DaggerColorToRaylibColor(color));
         }
 
-        public override void SetTransform(Vector2 position, float rotation)
+        public override void SetTransform(Vector2 position, Vector2 offset, float rotation = 0)
         {
             _position = position;
+            _offset = offset;
             _rotation = rotation;
         }
 
@@ -153,7 +154,7 @@ namespace DaggerFramework.Rendering
                 y = _position.Y,
                 width = size.X,
                 height = size.Y
-            }, Vector2.Zero, _rotation, DaggerColorToRaylibColor(color));
+            }, _offset, _rotation, DaggerColorToRaylibColor(color));
         }
 
         public override void DrawDebugText(string text, int fontSize, Color color)
@@ -203,7 +204,7 @@ namespace DaggerFramework.Rendering
 
         private List<Texture2D> _texturePool = new();
         private List<Raylib_cs.Font> _fontPool = new();
-        private Vector2 _position;
+        private Vector2 _position, _offset;
         private float _rotation;
         private Vector2 _windowSize;
     }

DaggerFramework/Source/Rendering/Renderer.cs

@@ -82,8 +82,9 @@ namespace DaggerFramework.Rendering
         /// Sets transforms for the next draw operation.
         /// </summary>
         /// <param name="position">Global transform position.</param>
+        /// <param name="offset">Local offset point around which shapes will rotate.</param> 
         /// <param name="rotation">Rotation.</param>
-        public abstract void SetTransform(Vector2 position, float rotation = 0.0f);
+        public abstract void SetTransform(Vector2 position, Vector2 offset, float rotation = 0.0f);
         /// <summary>
         /// Sets the transform for the next draw operation.
         /// </summary>

DaggerFramework/Source/Rendering/StandardRenderer.cs

@@ -102,7 +102,7 @@ namespace DaggerFramework.Rendering
         }
 
         /// <inheritdoc />
-        public override void SetTransform(Vector2 position, float rotation = 0)
+        public override void SetTransform(Vector2 position, Vector2 offset, float rotation = 0)
         {
             throw new NotImplementedException();
         }

DaggerFramework/Source/SceneGraph/Entities/Drawable2d.cs

@@ -1,12 +1,14 @@
+using System.Numerics;
 using DaggerFramework.Rendering;
 
 namespace DaggerFramework.SceneGraph
 {
     public abstract class Drawable2d : Entity2d, IDrawable
     {
+        public Vector2 PivotOffset { get; set; }
         public void Draw(Renderer renderer)
         {
-            renderer.SetTransform(Position);
+            renderer.SetTransform(Position, PivotOffset, Rotation);
             OnDraw(renderer);
         }
 

DaggerFramework/Source/SceneGraph/Entities/Entity2d.cs

@@ -5,5 +5,6 @@ namespace DaggerFramework.SceneGraph
     public class Entity2d : Entity
     {
         public Vector2 Position { get; set; }
+        public float Rotation { get; set; }
     }
 }

DaggerFramework/Source/SceneGraph/Entities/Particles2d.cs

@@ -31,7 +31,7 @@ namespace DaggerFramework.SceneGraph
                 var scale = MathUtils.Lerp(_settings.ScaleEnd, _settings.ScaleBegin, t);
                 var color = MathUtils.LerpColor(_settings.ColorEnd, _settings.ColorBegin, t);
 
-                renderer.SetTransform(particle.Position, particle.Rotation);
+                renderer.SetTransform(particle.Position, Vector2.Zero, particle.Rotation);
                 renderer.DrawRectangle(Vector2.One * scale, color);
             }
         }

DaggerFramework/Source/SceneGraph/Entities/RectangleShape2d.cs

@@ -9,6 +9,7 @@ public class RectangleShape2d : Drawable2d
     public Color Color { get; set; } = Color.White;
     public override void OnDraw(Renderer renderer)
     {
+        PivotOffset = Size / 2;
         renderer.DrawRectangle(Size, Color);
     }
 }