Add a PlayerExperience trait

OpenRA.Mods.Common/OpenRA.Mods.Common.csproj

@@ -388,6 +388,7 @@
     <Compile Include="Traits\Player\MissionObjectives.cs" />
     <Compile Include="Traits\Player\PlaceBeacon.cs" />
     <Compile Include="Traits\Player\PlaceBuilding.cs" />
+    <Compile Include="Traits\Player\PlayerExperience.cs" />
     <Compile Include="Traits\Player\PlayerStatistics.cs" />
     <Compile Include="Traits\Player\ProductionQueue.cs" />
     <Compile Include="Traits\Player\ProvidesPrerequisite.cs" />

OpenRA.Mods.Common/Traits/GivesExperience.cs

@@ -22,6 +22,12 @@ namespace OpenRA.Mods.Common.Traits
 		[Desc("Stance the attacking player needs to receive the experience.")]
 		public readonly Stance ValidStances = Stance.Neutral | Stance.Enemy;
 
+		[Desc("Percentage of the `Experience` value that is being granted to the killing actor.")]
+		public readonly int ActorExperienceModifier = 10000;
+
+		[Desc("Percentage of the `Experience` value that is being granted to the player owning the killing actor.")]
+		public readonly int PlayerExperienceModifier = 0;
+
 		public object Create(ActorInitializer init) { return new GivesExperience(init.Self, this); }
 	}
 
@@ -44,14 +50,17 @@ namespace OpenRA.Mods.Common.Traits
 
 			var valued = self.Info.TraitInfoOrDefault<ValuedInfo>();
 
-			// Default experience is 100 times our value
 			var exp = info.Experience >= 0
 				? info.Experience
-				: valued != null ? valued.Cost * 100 : 0;
+				: valued != null ? valued.Cost : 0;
 
 			var killer = e.Attacker.TraitOrDefault<GainsExperience>();
 			if (killer != null)
-				killer.GiveExperience(exp);
+				killer.GiveExperience(Util.ApplyPercentageModifiers(exp, new[] { info.ActorExperienceModifier }));
+
+			var attackerExp = e.Attacker.Owner.PlayerActor.TraitOrDefault<PlayerExperience>();
+			if (attackerExp != null)
+				attackerExp.GiveExperience(Util.ApplyPercentageModifiers(exp, new[] { info.PlayerExperienceModifier }));
 		}
 	}
 }

OpenRA.Mods.Common/Traits/Player/PlayerExperience.cs

@@ -0,0 +1,35 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2016 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using System;
+using System.Linq;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Traits
+{
+	[Desc("This trait can be used to track player experience based on units killed with the `GivesExperience` trait.",
+		"It can also be used as a point score system in scripted maps, for example.",
+		"Attach this to the player actor.")]
+	public class PlayerExperienceInfo : ITraitInfo
+	{
+		public object Create(ActorInitializer init) { return new PlayerExperience(); }
+	}
+
+	public class PlayerExperience : ISync
+	{
+		[Sync] public int Experience { get; private set; }
+
+		public void GiveExperience(int num)
+		{
+			Experience += num;
+		}
+	}
+}

OpenRA.Mods.Common/Traits/Player/PlayerStatistics.cs

@@ -23,6 +23,7 @@ namespace OpenRA.Mods.Common.Traits
 	public class PlayerStatistics : ITick, IResolveOrder, INotifyCreated
 	{
 		PlayerResources resources;
+		PlayerExperience experience;
 
 		public int OrderCount;
 
@@ -34,6 +35,14 @@ namespace OpenRA.Mods.Common.Traits
 			}
 		}
 
+		public int Experience
+		{
+			get
+			{
+				return experience != null ? experience.Experience : 0;
+			}
+		}
+
 		public Queue<int> EarnedSamples = new Queue<int>(100);
 		int earnedAtBeginningOfMinute;
 
@@ -51,6 +60,7 @@ namespace OpenRA.Mods.Common.Traits
 		void INotifyCreated.Created(Actor self)
 		{
 			resources = self.TraitOrDefault<PlayerResources>();
+			experience = self.TraitOrDefault<PlayerExperience>();
 		}
 
 		void UpdateEarnedThisMinute()