Added UpdateTimer

craftersmine.EtherEngine.Utilities/UpdateTimer.cs

@@ -0,0 +1,105 @@
+using System;
+using System.Diagnostics;
+using System.Threading;
+
+namespace craftersmine.EtherEngine.Utilities
+{
+    /// <summary>
+    /// Represents a specific frequency timer. This class cannot be inherited
+    /// </summary>
+    public sealed class UpdateTimer
+    {
+        private DateTime _last;
+        private TimeSpan _lag;
+        private DateTime _current;
+        private TimeSpan _elapsed;
+        private Thread _updaterThread;
+        private TimeSpan _updaterFrequency;
+
+        /// <summary>
+        /// Gets true if timer is active, otherwise false
+        /// </summary>
+        public bool IsActive { get; private set; }
+        /// <summary>
+        /// Gets current timer frequency
+        /// </summary>
+        public float UpdaterFrequency { get; private set; }
+        /// <summary>
+        /// Gets last fixed update elapsed time
+        /// </summary>
+        public TimeSpan FixedUpdateTime { get { return _elapsed; } }
+        /// <summary>
+        /// Gets last update elapsed time
+        /// </summary>
+        public TimeSpan UpdateTime { get { return FixedUpdateTime + Lag; } }
+        /// <summary>
+        /// Gets lag time
+        /// </summary>
+        public TimeSpan Lag { get { return _lag; } }
+
+        /// <summary>
+        /// Occurs when FixedUpdate being called
+        /// </summary>
+        public event EventHandler<UpdateEventArgs> FixedUpdate;
+        /// <summary>
+        /// Occurs when Update beind called
+        /// </summary>
+        public event EventHandler<UpdateEventArgs> Update;
+        //public TimeSpan LastUpdateTime { get { return _last; } }
+        //public TimeSpan LagTime { get { return _lag; } }
+
+        /// <summary>
+        /// Creates new <see cref="UpdateTimer"/> instance with specific frequency
+        /// </summary>
+        /// <param name="frequency">Timer update frequency</param>
+        public UpdateTimer(float frequency)
+        {
+            IsActive = false;
+            UpdaterFrequency = frequency;
+            _updaterThread = new Thread(new ThreadStart(Updater));
+            _updaterFrequency = TimeSpan.FromMilliseconds(1000.0f / UpdaterFrequency);
+        }
+
+        /// <summary>
+        /// Stops timer
+        /// </summary>
+        public void Stop()
+        {
+            IsActive = false;
+        }
+
+        /// <summary>
+        /// Starts timer
+        /// </summary>
+        public void Start()
+        {
+            IsActive = true;
+            _updaterThread.Start();
+        }
+
+        private void Updater()
+        {
+            _last = DateTime.Now;
+            _lag = TimeSpan.Zero;
+            while (IsActive)
+            {
+                _current = DateTime.Now;
+                _elapsed = _current - _last;
+                _last = _current;
+                _lag += _elapsed;
+
+                FixedUpdate?.Invoke(this, new UpdateEventArgs() { DeltaTime = _elapsed });
+
+                while (_lag >= _updaterFrequency) {
+                    Update?.Invoke(this, new UpdateEventArgs() { DeltaTime = _elapsed + _lag });
+                    _lag -= _updaterFrequency;
+                }
+            }
+        }
+    }
+
+    public sealed class UpdateEventArgs : EventArgs
+    {
+        public TimeSpan DeltaTime { get; set; }
+    }
+}

craftersmine.EtherEngine.Utilities/craftersmine.EtherEngine.Utilities.csproj

@@ -50,6 +50,7 @@
     <Compile Include="Debugging.cs" />
     <Compile Include="Logger.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="UpdateTimer.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
 </Project>