Initial commit: OpenRA game engine

Fork from OpenRA/OpenRA with one-click launch script (start-ra.cmd)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

OpenRA.Mods.Common/Traits/Parachutable.cs

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+#region Copyright & License Information
+/*
+ * Copyright (c) The OpenRA Developers and Contributors
+ * 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.Frozen;
+using System.Collections.Generic;
+using System.Linq;
+using OpenRA.Mods.Common.Effects;
+using OpenRA.Primitives;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Traits
+{
+	[Desc("Can be paradropped by a ParaDrop actor.")]
+	public class ParachutableInfo : TraitInfo, Requires<IPositionableInfo>
+	{
+		[Desc("If we land on invalid terrain for my actor type should we be killed?")]
+		public readonly bool KilledOnImpassableTerrain = true;
+
+		[Desc("Types of damage that this trait causes to self when 'KilledOnImpassableTerrain' is true. Leave empty for no damage types.")]
+		public readonly BitSet<DamageType> DamageTypes = default;
+
+		[Desc("Image where Ground/WaterCorpseSequence is looked up.")]
+		public readonly string Image = "explosion";
+
+		[SequenceReference(nameof(Image), allowNullImage: true)]
+		public readonly string GroundCorpseSequence = null;
+
+		[PaletteReference]
+		public readonly string GroundCorpsePalette = "effect";
+
+		public readonly string GroundImpactSound = null;
+
+		[SequenceReference(nameof(Image), allowNullImage: true)]
+		public readonly string WaterCorpseSequence = null;
+
+		[PaletteReference]
+		public readonly string WaterCorpsePalette = "effect";
+
+		[Desc("Terrain types on which to display WaterCorpseSequence.")]
+		public readonly FrozenSet<string> WaterTerrainTypes = new HashSet<string> { "Water" }.ToFrozenSet();
+
+		public readonly string WaterImpactSound = null;
+
+		public readonly int FallRate = 13;
+
+		[GrantedConditionReference]
+		[Desc("The condition to grant to self while parachuting.")]
+		public readonly string ParachutingCondition = null;
+
+		public override object Create(ActorInitializer init) { return new Parachutable(init.Self, this); }
+	}
+
+	public class Parachutable : INotifyParachute
+	{
+		readonly ParachutableInfo info;
+		readonly IPositionable positionable;
+
+		public Actor IgnoreActor;
+
+		int parachutingToken = Actor.InvalidConditionToken;
+
+		public Parachutable(Actor self, ParachutableInfo info)
+		{
+			this.info = info;
+			positionable = self.Trait<IPositionable>();
+		}
+
+		public bool IsInAir { get; private set; }
+
+		void INotifyParachute.OnParachute(Actor self)
+		{
+			IsInAir = true;
+
+			if (parachutingToken == Actor.InvalidConditionToken)
+				parachutingToken = self.GrantCondition(info.ParachutingCondition);
+
+			self.NotifyBlocker(self.Location);
+		}
+
+		void INotifyParachute.OnLanded(Actor self)
+		{
+			IsInAir = false;
+
+			if (parachutingToken != Actor.InvalidConditionToken)
+				parachutingToken = self.RevokeCondition(parachutingToken);
+
+			if (!info.KilledOnImpassableTerrain)
+				return;
+
+			var cell = self.Location;
+			if (positionable.CanEnterCell(cell, self))
+				return;
+
+			if (IgnoreActor != null && !self.World.ActorMap.GetActorsAt(cell)
+				.Any(a => a != IgnoreActor && a != self && self.World.Map.DistanceAboveTerrain(a.CenterPosition) == WDist.Zero))
+				return;
+
+			var onWater = info.WaterTerrainTypes.Contains(self.World.Map.GetTerrainInfo(cell).Type);
+			var sound = onWater ? info.WaterImpactSound : info.GroundImpactSound;
+			Game.Sound.Play(SoundType.World, sound, self.CenterPosition);
+
+			var sequence = onWater ? info.WaterCorpseSequence : info.GroundCorpseSequence;
+			var palette = onWater ? info.WaterCorpsePalette : info.GroundCorpsePalette;
+			if (!string.IsNullOrEmpty(info.Image) && !string.IsNullOrEmpty(sequence) && palette != null)
+				self.World.AddFrameEndTask(w => w.Add(new SpriteEffect(self.OccupiesSpace.CenterPosition, w, info.Image, sequence, palette)));
+
+			self.Kill(self, info.DamageTypes);
+		}
+	}
+}