riversong code showcase

Source/Riversong/Game/Rendering/GlobalShaderParametersSystem.cs

@@ -0,0 +1,43 @@
+using System;
+using Cysharp.Threading.Tasks;
+using UnityEngine;
+
+namespace DanieleMarotta.RiversongCodeShowcase
+{
+    [GameSystemGroup(typeof(LateGameSystemGroup))]
+    public class GlobalShaderParametersSystem : GameSystem, IInitializable, IDisposable, IUpdatable
+    {
+        [InjectService]
+        private World _world;
+
+        [InjectService]
+        private ISignalBus _signalBus;
+
+        public GlobalShaderParametersSystem(IServiceLocator serviceLocator) : base(serviceLocator)
+        {
+        }
+
+        public UniTask InitializeAsync()
+        {
+            _signalBus.Subscribe<WorldReadySignal>(OnWorldReady);
+            return UniTask.CompletedTask;
+        }
+
+        public void Dispose()
+        {
+            _signalBus.Unsubscribe<WorldReadySignal>(OnWorldReady);
+        }
+
+        public void Update()
+        {
+            var t = Time.unscaledTime;
+            Shader.SetGlobalVector(ShaderProperties.UnscaledTime, new Vector4(t / 20, t, t * 2, t * 3));
+        }
+
+        private void OnWorldReady(WorldReadySignal signal)
+        {
+            Shader.SetGlobalVector(ShaderProperties.WorldSize, new Vector4(_world.Size.x, _world.Size.y, 0, 0));
+            Shader.SetGlobalVector(ShaderProperties.InverseWorldSize, new Vector2(1 / (float)_world.Size.x, 1 / (float)_world.Size.y));
+        }
+    }
+}