Timing helpers

src/Scene.bf

@@ -5,6 +5,8 @@ namespace Strawberry
 {
 	public class Scene
 	{
+		public float TimeStarted { get; private set; }
+
 		private List<Entity> entities;
 		private HashSet<Entity> toRemove;
 		private HashSet<Entity> toAdd;
@@ -33,7 +35,7 @@ namespace Strawberry
 
 		public virtual void Started()
 		{
-			
+			TimeStarted = Time.Elapsed;
 		}
 
 		public virtual void Update()
@@ -95,6 +97,36 @@ namespace Strawberry
 			}
 		}
 
+		// Time
+
+		public float TimeElapsed
+		{
+			[Inline]
+			get
+			{
+				return Time.Elapsed - TimeStarted;
+			}
+		}
+
+		public float PreviousTimeElapsed
+		{
+			[Inline]
+			get
+			{
+				return Time.PreviousElapsed - TimeStarted;
+			}
+		}
+
+		public bool TimeOnInterval(float interval, float offset = 0)
+		{
+			return (int)((TimeElapsed - offset) / interval) != (int)((PreviousTimeElapsed - offset) / interval);
+		}
+
+		public bool TimeBetweenInterval(float interval, float offset = 0)
+		{
+			return (TimeElapsed - offset) % (interval * 2) >= interval;
+		}
+
 		// Finding Entities
 
 		public T First<T>() where T : Entity

src/Time.bf

@@ -5,5 +5,15 @@ namespace Strawberry
 		static public float Elapsed;
 		static public float PreviousElapsed;
 		static public float Delta = 1 / 60f;
+
+		static public bool OnInterval(float interval, float offset = 0)
+		{
+			return (int)((Elapsed - offset) / interval) != (int)((PreviousElapsed - offset) / interval);
+		}
+
+		static public bool BetweenInterval(float interval, float offset = 0)
+		{
+			return (Elapsed - offset) % (interval * 2) >= interval;
+		}
 	}
 }