Move projectiles to their own namespace and folder

While they are (currently) technically effects, this makes the actual purpose and wiki more clear.

OpenRA.Mods.Common/Projectiles/LaserZap.cs

@@ -0,0 +1,118 @@
+#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.Collections.Generic;
+using System.Drawing;
+using OpenRA.Effects;
+using OpenRA.GameRules;
+using OpenRA.Graphics;
+using OpenRA.Mods.Common.Effects;
+using OpenRA.Mods.Common.Graphics;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Projectiles
+{
+	[Desc("Not a sprite, but an engine effect.")]
+	class LaserZapInfo : IProjectileInfo
+	{
+		[Desc("The width of the zap.")]
+		public readonly WDist Width = new WDist(86);
+
+		[Desc("The shape of the beam.  Accepts values Cylindrical or Flat.")]
+		public readonly BeamRenderableShape Shape = BeamRenderableShape.Cylindrical;
+
+		[Desc("Equivalent to sequence ZOffset. Controls Z sorting.")]
+		public readonly int ZOffset = 0;
+
+		public readonly int BeamDuration = 10;
+
+		public readonly bool UsePlayerColor = false;
+
+		[Desc("Laser color in (A,)R,G,B.")]
+		public readonly Color Color = Color.Red;
+
+		[Desc("Impact animation.")]
+		public readonly string HitAnim = null;
+
+		[Desc("Sequence of impact animation to use.")]
+		[SequenceReference("HitAnim")] public readonly string HitAnimSequence = "idle";
+
+		[PaletteReference] public readonly string HitAnimPalette = "effect";
+
+		public IEffect Create(ProjectileArgs args)
+		{
+			var c = UsePlayerColor ? args.SourceActor.Owner.Color.RGB : Color;
+			return new LaserZap(args, this, c);
+		}
+	}
+
+	class LaserZap : IEffect
+	{
+		readonly ProjectileArgs args;
+		readonly LaserZapInfo info;
+		readonly Animation hitanim;
+		int ticks = 0;
+		Color color;
+		bool doneDamage;
+		bool animationComplete;
+		WPos target;
+
+		public LaserZap(ProjectileArgs args, LaserZapInfo info, Color color)
+		{
+			this.args = args;
+			this.info = info;
+			this.color = color;
+			target = args.PassiveTarget;
+
+			if (!string.IsNullOrEmpty(info.HitAnim))
+				hitanim = new Animation(args.SourceActor.World, info.HitAnim);
+		}
+
+		public void Tick(World world)
+		{
+			// Beam tracks target
+			if (args.GuidedTarget.IsValidFor(args.SourceActor))
+				target = args.GuidedTarget.CenterPosition;
+
+			if (!doneDamage)
+			{
+				if (hitanim != null)
+					hitanim.PlayThen(info.HitAnimSequence, () => animationComplete = true);
+
+				args.Weapon.Impact(Target.FromPos(target), args.SourceActor, args.DamageModifiers);
+				doneDamage = true;
+			}
+
+			if (hitanim != null)
+				hitanim.Tick();
+
+			if (++ticks >= info.BeamDuration && animationComplete)
+				world.AddFrameEndTask(w => w.Remove(this));
+		}
+
+		public IEnumerable<IRenderable> Render(WorldRenderer wr)
+		{
+			if (wr.World.FogObscures(target) &&
+				wr.World.FogObscures(args.Source))
+				yield break;
+
+			if (ticks < info.BeamDuration)
+			{
+				var rc = Color.FromArgb((info.BeamDuration - ticks) * 255 / info.BeamDuration, color);
+				yield return new BeamRenderable(args.Source, info.ZOffset, target - args.Source, info.Shape, info.Width, rc);
+			}
+
+			if (hitanim != null)
+				foreach (var r in hitanim.Render(target, wr.Palette(info.HitAnimPalette)))
+					yield return r;
+		}
+	}
+}