Added Unity project files

Packages/com.vrchat.worlds/Integrations/ClientSim/Runtime/Player/ClientSimReticle.cs

@@ -0,0 +1,104 @@
+
+using System;
+using UnityEngine;
+
+namespace VRC.SDK3.ClientSim
+{
+    /// <summary>
+    /// This system is responsible for displaying the Reticle in the center of the screen
+    /// and for displaying the mouse UI pointer if there is a UI Shape under the mouse.
+    /// </summary>
+    /// <remarks>
+    /// Listens to Events:
+    /// - ClientSimMouseReleasedEvent
+    /// - ClientSimRaycastHitResultsEvent
+    /// </remarks>
+    [AddComponentMenu("")]
+    public class ClientSimReticle : ClientSimBehaviour, IDisposable
+    {
+        [SerializeField]
+        private Texture2D reticle;
+        [SerializeField]
+        private Texture2D uiShapeHoverIcon;
+        
+        private IClientSimEventDispatcher _eventDispatcher;
+        private ClientSimSettings _settings;
+        private IClientSimMousePositionProvider _mousePositionProvider;
+
+        private bool _mouseReleased = false;
+        private int _lastUiShapeHoveredFrame = -1;
+
+        public void Initialize(
+            IClientSimEventDispatcher eventDispatcher, 
+            ClientSimSettings settings,
+            IClientSimMousePositionProvider mousePositionProvider)
+        {
+            _settings = settings;
+            _eventDispatcher = eventDispatcher;
+            _mousePositionProvider = mousePositionProvider;
+
+            _eventDispatcher.Subscribe<ClientSimMouseReleasedEvent>(MouseReleasedEvent);
+            _eventDispatcher.Subscribe<ClientSimRaycastHitResultsEvent>(OnRaycastHit);
+        }
+
+        private void OnDestroy()
+        {
+            Dispose();
+        }
+        
+        public void Dispose()
+        {
+            _eventDispatcher?.Unsubscribe<ClientSimMouseReleasedEvent>(MouseReleasedEvent);
+            _eventDispatcher?.Unsubscribe<ClientSimRaycastHitResultsEvent>(OnRaycastHit);
+        }
+        
+        #region ClientSim Events
+
+        private void MouseReleasedEvent(ClientSimMouseReleasedEvent mouseReleasedEvent)
+        {
+            _mouseReleased = mouseReleasedEvent.isReleased;
+        }
+
+        private void OnRaycastHit(ClientSimRaycastHitResultsEvent hitEvent)
+        {
+            if (hitEvent.raycastResults?.uiShape != null)
+            {
+                _lastUiShapeHoveredFrame = Time.frameCount;
+            }
+        }
+        
+        #endregion
+
+        private bool ShouldShowReticle()
+        {
+            return _settings.showDesktopReticle && !_mouseReleased;
+        }
+
+        private bool ShouldShowUiShapeHoverIcon()
+        {
+            return _lastUiShapeHoveredFrame == Time.frameCount;
+        }
+        
+        private void OnGUI()
+        {
+            if (ShouldShowReticle())
+            {
+                Vector2 center = ClientSimBaseInput.GetScreenCenter();
+                Vector2 size = new Vector2(reticle.width, reticle.height);
+                Rect position = new Rect(center - size * 0.5f, size);
+                GUI.DrawTexture(position, reticle);
+            }
+
+            if (ShouldShowUiShapeHoverIcon())
+            {
+                Vector2 mousePos = _mousePositionProvider.GetMousePosition();
+                // GUI draws with inverted y
+                mousePos.y = Screen.height - mousePos.y;
+                
+                Vector2 size = new Vector2(uiShapeHoverIcon.width, uiShapeHoverIcon.height);
+                Rect position = new Rect(mousePos - new Vector2(8, 8), size);
+                GUI.DrawTexture(position, uiShapeHoverIcon);
+            }
+        }
+    }
+}