Added shuffling feature.

Author: jackbrookes

Assets/ExpMngr/Scripts/Block.cs

@@ -56,6 +56,9 @@ public Trial GetRelativeTrial(int relativeTrialNumber)
             return trials[relativeTrialNumber - 1];
         }
 
+
+        
+
     }
 
 }

Assets/ExpMngr/Scripts/ExperimentSession.cs

@@ -108,7 +108,8 @@ public class ExperimentSession : MonoBehaviour
         public Block currentBlock { get { return GetBlock(); } }
 
         /// <summary>
-        /// return trials for all blocks
+        /// Returns a list of trials for all blocks.  Modifying the order of this list will not affect trial order. Modify block.trials to change order within blocks.
+        ///  
         /// </summary>
         public List<Trial> trials
         {

Assets/ExpMngr/Scripts/Extensions.cs

@@ -6,6 +6,13 @@
 
 static class Extensions
 {
+
+    /// <summary>
+    /// Random number generator with seed based on current time.
+    /// </summary>
+    /// <returns></returns>
+    private static System.Random rng = new System.Random();
+
     public static IList<T> Clone<T>(this IList<T> listToClone) where T : ICloneable
     {
         return listToClone.Select(item => (T)item.Clone()).ToList();
@@ -15,4 +22,33 @@ public static string GetSafeFilename(string filename)
     {
         return string.Join("", filename.Split(Path.GetInvalidFileNameChars()));
     }
+
+    /// <summary>
+    /// Shuffles a list in-place with a given random number generator.
+    /// </summary>
+    /// <param name="list">List to shuffle</param>
+    /// <param name="rng">Random number generator via which the shuffling occurs</param>
+    public static void Shuffle<T>(this IList<T> list, System.Random rng)
+    {
+
+        int n = list.Count;
+        while (n > 1)
+        {
+            n--;
+            int k = rng.Next(n + 1);
+            T value = list[k];
+            list[k] = list[n];
+            list[n] = value;
+        }
+    }
+
+    /// <summary>
+    /// Shuffles a list in-place with the current time based random number generator. 
+    /// </summary>
+    /// <param name="list">List to shuffle</param>
+    public static void Shuffle<T>(this IList<T> list)
+    {
+        list.Shuffle(rng);
+    }
+
 }