Adapt tracking projectiles to support targeting CenterPosition

Instead of closest targetable position.

OpenRA.Mods.Cnc/Projectiles/TeslaZap.cs

@@ -36,6 +36,9 @@ namespace OpenRA.Mods.Cnc.Projectiles
 
 		public readonly bool TrackTarget = true;
 
+		[Desc("Ignore any other targetable positions and aim directly at center of target actor.")]
+		public readonly bool TargetCenterPosition = false;
+
 		public IProjectile Create(ProjectileArgs args) { return new TeslaZap(this, args); }
 	}
 
@@ -64,7 +67,7 @@ namespace OpenRA.Mods.Cnc.Projectiles
 
 			// Zap tracks target
 			if (info.TrackTarget && args.GuidedTarget.IsValidFor(args.SourceActor))
-				target = args.GuidedTarget.Positions.PositionClosestTo(args.Source);
+				target = info.TargetCenterPosition ? args.GuidedTarget.CenterPosition : args.GuidedTarget.Positions.PositionClosestTo(args.Source);
 
 			if (damageDuration-- > 0)
 				args.Weapon.Impact(Target.FromPos(target), args.SourceActor, args.DamageModifiers);

OpenRA.Mods.Common/Projectiles/AreaBeam.cs

@@ -57,6 +57,9 @@ namespace OpenRA.Mods.Common.Projectiles
 		[Desc("Does the beam follow the target.")]
 		public readonly bool TrackTarget = false;
 
+		[Desc("Ignore any other targetable positions and aim directly at center of target actor.")]
+		public readonly bool TargetCenterPosition = false;
+
 		[Desc("Should the beam be visually rendered? False = Beam is invisible.")]
 		public readonly bool RenderBeam = true;
 
@@ -157,7 +160,7 @@ namespace OpenRA.Mods.Common.Projectiles
 
 			if (args.GuidedTarget.IsValidFor(args.SourceActor))
 			{
-				var guidedTargetPos = args.GuidedTarget.Positions.PositionClosestTo(args.Source);
+				var guidedTargetPos = info.TargetCenterPosition ? args.GuidedTarget.CenterPosition : args.GuidedTarget.Positions.PositionClosestTo(args.Source);
 				var targetDistance = new WDist((guidedTargetPos - args.Source).Length);
 
 				// Only continue tracking target if it's within weapon range +

OpenRA.Mods.Common/Projectiles/LaserZap.cs

@@ -49,6 +49,9 @@ namespace OpenRA.Mods.Common.Projectiles
 		[Desc("Beam can be blocked.")]
 		public readonly bool Blockable = false;
 
+		[Desc("Ignore any other targetable positions and aim directly at center of target actor.")]
+		public readonly bool TargetCenterPosition = false;
+
 		[Desc("Draw a second beam (for 'glow' effect).")]
 		public readonly bool SecondaryBeam = false;
 
@@ -128,7 +131,7 @@ namespace OpenRA.Mods.Common.Projectiles
 		{
 			// Beam tracks target
 			if (info.TrackTarget && args.GuidedTarget.IsValidFor(args.SourceActor))
-				target = args.GuidedTarget.Positions.PositionClosestTo(source);
+				target = info.TargetCenterPosition ? args.GuidedTarget.CenterPosition : args.GuidedTarget.Positions.PositionClosestTo(source);
 
 			// Check for blocking actors
 			WPos blockedPos;

OpenRA.Mods.Common/Projectiles/Missile.cs

@@ -137,6 +137,9 @@ namespace OpenRA.Mods.Common.Projectiles
 			"the missile enters the radius of the current speed around the target.")]
 		public readonly bool AllowSnapping = false;
 
+		[Desc("Ignore any other targetable positions and aim directly at center of target actor.")]
+		public readonly bool TargetCenterPosition = false;
+
 		[Desc("Explodes when inside this proximity radius to target.",
 			"Note: If this value is lower than the missile speed, this check might",
 			"not trigger fast enough, causing the missile to fly past the target.")]
@@ -799,7 +802,7 @@ namespace OpenRA.Mods.Common.Projectiles
 			// Check if target position should be updated (actor visible & locked on)
 			var newTarPos = targetPosition;
 			if (args.GuidedTarget.IsValidFor(args.SourceActor) && lockOn)
-				newTarPos = args.GuidedTarget.Positions.PositionClosestTo(args.Source)
+				newTarPos = (info.TargetCenterPosition ? args.GuidedTarget.CenterPosition : args.GuidedTarget.Positions.PositionClosestTo(args.Source))
 					+ new WVec(WDist.Zero, WDist.Zero, info.AirburstAltitude);
 
 			// Compute target's predicted velocity vector (assuming uniform circular motion)