First Commit

Assets/Scripts/RenderPasses/GhostObjectCollection.cs

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+using System.Collections.Generic;
+using UnityEngine;
+
+namespace Golems
+{
+    /// <summary>
+    /// A gross singleton collection of all the Ghost Object Behaviours
+    /// which require rendering via Albert Ghost Memory This is purely
+    /// convenience for the AlbertGhostMemory to access Ghost Object Behaviours
+    /// and for Ghost Object Behaviours to register/unregister themselves.
+    /// </summary>
+    public class GhostObjectCollection
+    {
+        /// <summary>
+        /// The active singleton of GhostObjectCollection
+        /// </summary>
+        private static GhostObjectCollection m_Instance;
+
+        public static GhostObjectCollection Instance
+        {
+            get
+            {
+                if (m_Instance == null) new GhostObjectCollection();
+                return m_Instance;
+            }
+        }
+        
+        /// <summary>
+        /// Collection of all the Ghost Object Behaviours which require rendering
+        /// </summary>
+        public List<GhostObjectBehaviour> GhostObjectBehaviours { get; private set; }
+        
+        /// <summary>
+        /// Flag if there's anything Ghost Object Behaviours which require rendering
+        /// </summary>
+        public bool HasSomethingToRender()=> GhostObjectBehaviours != null && GhostObjectBehaviours.Count > 0;
+        
+        /// <summary>
+        /// The number of objects rendered in AlbertGhostMemoryPass.
+        /// This is reset in AlbertGhostMemoryPass.Execute() and incremented in
+        /// DrawObjectsDefault().
+        /// ComposeOutlinePass uses this in AddRenderPasses, if it's zero screen copy Blit is avoided.
+        ///
+        /// N.B This is a sketchy place to do this sort of thing, full acknowledged but it's quick, easy and works...
+        /// </summary>
+        public int NumberOfObjectsRendered = 0;
+
+        private GhostObjectCollection()
+        {
+            m_Instance = this;
+            GhostObjectBehaviours = new List<GhostObjectBehaviour>();
+        }
+        
+        /// <summary>
+        /// Add the passed Ghost Object Behaviour to Albert Ghost Memory pass
+        /// </summary>
+        public void AddGhostObjectBehaviour(GhostObjectBehaviour ghostObjectBehaviour)
+        {
+            if (ghostObjectBehaviour == null) return;
+            GhostObjectBehaviours.Add(ghostObjectBehaviour);
+        }
+        
+        /// <summary>
+        /// Remove the passed Ghost Object Behaviour to Albert Ghost Memory pass
+        /// </summary>
+        public void RemoveGhostObjectBehaviour(GhostObjectBehaviour ghostObjectBehaviour)
+        {
+            if (ghostObjectBehaviour == null) return;
+            GhostObjectBehaviours.Remove(ghostObjectBehaviour);
+        }
+    }
+}
+