Created ShakeScreenWarhead and removed the hardcoded shaking from NukeLaunch and MadTank

OpenRA.Mods.Common/Warheads/ShakeScreenWarhead.cs

@@ -0,0 +1,34 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2020 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 OpenRA.GameRules;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Warheads
+{
+	[Desc("Makes the screen shake.")]
+	public class ShakeScreenWarhead : Warhead
+	{
+		[Desc("Duration of the shaking.")]
+		public readonly int Duration = 0;
+
+		[Desc("Shake intensity.")]
+		public readonly int Intensity = 0;
+
+		[Desc("Shake multipliers by the X and Y axis, comma-separated.")]
+		public readonly float2 Multiplier = new float2(0, 0);
+
+		public override void DoImpact(Target target, WarheadArgs args)
+		{
+			args.SourceActor.World.WorldActor.Trait<ScreenShaker>().AddEffect(Duration, target.CenterPosition, Intensity, Multiplier);
+		}
+	}
+}