added Parachute effect + sequences + cargo for BADR

OpenRa.Game/Effects/Parachute.cs

@@ -0,0 +1,62 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using OpenRa.Traits;
+using OpenRa.Graphics;
+
+namespace OpenRa.Effects
+{
+	class Parachute : IEffect
+	{
+		readonly Animation anim;
+		readonly Animation paraAnim;
+		readonly float2 location;
+		
+		readonly Actor cargo;
+		readonly Player owner;
+
+		float altitude;
+		const float fallRate = .3f;
+
+		public Parachute(Player owner, string image, float2 location, int altitude, Actor cargo)
+		{
+			this.location = location;
+			this.altitude = altitude;
+			this.cargo = cargo;
+			this.owner = owner;
+
+			anim = new Animation(image);
+			anim.PlayFetchIndex("idle", () => 0);
+			anim.Tick();
+
+			paraAnim = new Animation("parach");
+			paraAnim.PlayThen("open", () => paraAnim.PlayRepeating("idle"));
+		}
+
+		public void Tick(World world)
+		{ 
+			paraAnim.Tick();
+
+			altitude -= fallRate;
+
+			if (altitude <= 0)
+				world.AddFrameEndTask(w =>
+					{
+						w.Remove(this);
+						cargo.CancelActivity();
+						cargo.CenterLocation = location;
+						cargo.Location = ((1 / 24f) * location).ToInt2();
+						w.Add(cargo);
+					});
+		}
+
+		public IEnumerable<Renderable> Render()
+		{
+			var pos = location - new float2(0, altitude);
+			yield return new Renderable(anim.Image, location - .5f * anim.Image.size, PaletteType.Shadow, 0);
+			yield return new Renderable(anim.Image, pos - .5f * anim.Image.size, owner.Palette, 2);
+			yield return new Renderable(paraAnim.Image, pos - .5f * paraAnim.Image.size, owner.Palette, 3);
+		}
+	}
+}

OpenRa.Game/OpenRa.Game.csproj

@@ -83,6 +83,7 @@
     <Compile Include="Effects\GpsSatellite.cs" />
     <Compile Include="Effects\InvulnEffect.cs" />
     <Compile Include="Effects\MoveFlash.cs" />
+    <Compile Include="Effects\Parachute.cs" />
     <Compile Include="Effects\RepairIndicator.cs" />
     <Compile Include="Effects\SatelliteLaunch.cs" />
     <Compile Include="Effects\Smoke.cs" />