Split Render system into 3

src/gaemstone.Client/Systems/Renderer.cs

@@ -15,7 +15,10 @@ using static gaemstone.Components.TransformComponents;
 namespace gaemstone.Client.Systems;
 
 [Module]
-[DependsOn(typeof(Windowing))]
+[DependsOn(typeof(gaemstone.Components.TransformComponents))]
+[DependsOn(typeof(gaemstone.Client.Components.CameraComponents))]
+[DependsOn(typeof(gaemstone.Client.Components.RenderingComponents))]
+[DependsOn(typeof(gaemstone.Client.Systems.Windowing))]
 public class Renderer
 	: IModuleInitializer
 {
@@ -51,28 +54,29 @@ public class Renderer
 		_modelMatrixUniform  = GL.GetUniformLocation(_program, "modelMatrix");
 	}
 
-	[System(typeof(SystemPhase.OnStore))]
-	public void Render(Universe universe, GameWindow window, Canvas canvas)
+	[System(typeof(SystemPhase.PreStore))]
+	public void Clear(Canvas canvas)
 	{
 		var GL = canvas.GL;
 		GL.UseProgram(_program);
 		GL.Viewport(default, canvas.Size);
 		GL.ClearColor(new Vector4D<float>(0, 0, 0, 255));
 		GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
+	}
 
-		Filter.RunOnce(universe, (in GlobalTransform cameraTransform,
-		                          in Camera camera, CameraViewport? viewport) => {
+	[System(typeof(SystemPhase.OnStore))]
+	public void Render(Universe universe, [Game] Canvas canvas,
+		in GlobalTransform cameraTransform, in Camera camera, CameraViewport? viewport)
+	{
 		var color  = viewport?.ClearColor ?? new(0x4B, 0x00, 0x82, 255);
 		var bounds = viewport?.Viewport   ?? new(default, canvas.Size);
 
+		var GL = canvas.GL;
 		GL.Enable(EnableCap.ScissorTest);
 		GL.Viewport(bounds); GL.Scissor(bounds.Origin.X, bounds.Origin.Y, (uint)bounds.Size.X, (uint)bounds.Size.Y);
 		GL.ClearColor(color); GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
 		GL.Disable(EnableCap.ScissorTest);
 
-			// Get the camera's transform matrix and invert it.
-			Matrix4X4.Invert<float>(cameraTransform, out var invertedTransform);
-
 		// Create the camera's projection matrix.
 		var cameraProjection = camera.IsOrthographic
 			? Matrix4X4.CreateOrthographic(
@@ -83,6 +87,8 @@ public class Renderer
 				(float)bounds.Size.X / bounds.Size.Y, // Aspect Ratio
 				camera.NearPlane, camera.FarPlane);
 
+		// Get the camera's transform matrix and invert it.
+		Matrix4X4.Invert<float>(cameraTransform, out var invertedTransform);
 		// Set the uniform to the combined transform and projection.
 		var cameraMatrix = invertedTransform * cameraProjection;
 		GL.UniformMatrix4(_cameraMatrixUniform, 1, false, in cameraMatrix.Row1.X);
@@ -117,11 +123,12 @@ public class Renderer
 				if (texture.HasValue) GL.BindTexture(texture.Value.Target, 0);
 			}
 		}
-		});
-
-		window.Handle.SwapBuffers();
 	}
 
+	[System(typeof(SystemPhase.PostFrame))]
+	public static void SwapBuffers(GameWindow window)
+		=> window.Handle.SwapBuffers();
+
 	[DebuggerStepThrough]
 	private static void DebugCallback(GLEnum source, GLEnum _type, int id, GLEnum _severity,
 	                                  int length, nint _message, nint userParam)