Contrail trait

2010-10-23 23:29:38 -05:00
parent ff7daf8727
commit c568dfa486
6 changed files with 139 additions and 3 deletions
--- a/OpenRA.Mods.RA/Effects/Contrail.cs
+++ b/OpenRA.Mods.RA/Effects/Contrail.cs
@@ -0,0 +1,109 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2010 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. For more information,
+ * see LICENSE.
+ */
+#endregion
+
+using System.Collections.Generic;
+using OpenRA.Graphics;
+using OpenRA.Traits;
+using System.Drawing;
+using OpenRA.FileFormats;
+
+namespace OpenRA.Mods.RA
+{
+	class ContrailInfo : ITraitInfo
+	{
+		public readonly int[] ContrailOffset = {0, 0};
+
+		public readonly int TrailLength = 20;
+		public readonly int[] TrailColor = null;
+
+		public object Create(ActorInitializer init) { return new Contrail(init.self, this); }
+	}
+
+	class Contrail : ITick, IPostRender
+	{
+		private ContrailInfo Info = null;
+
+		private List<float2> positions = new List<float2>();
+
+		private Turret ContrailTurret = null;
+
+		private int TrailLength = 0;
+		private Color TrailColor = Color.White;
+
+		public Contrail(Actor self, ContrailInfo info)
+		{
+			Info = info;
+
+			ContrailTurret = new Turret(Info.ContrailOffset);
+
+			TrailLength = Info.TrailLength;
+
+			// if no color specified or wrong format, blend with owner color
+			if (Info.TrailColor == null || Info.TrailColor.Length != 4)
+			{
+				var ownerColor = Color.FromArgb(255, self.Owner.Color);
+				TrailColor = PlayerColorRemap.ColorLerp(0.5f, ownerColor, Color.White);
+			}
+			else
+			{
+				// otherwise, blend with specified color
+				var blendColor = Color.FromArgb(255, Info.TrailColor[1].Clamp(0, 255),
+					Info.TrailColor[2].Clamp(0, 255), Info.TrailColor[3].Clamp(0, 255));
+				TrailColor = PlayerColorRemap.ColorLerp(0.5f, blendColor, Color.White);
+			}
+		}
+
+		public void Tick(Actor self)
+		{
+			var facing = self.Trait<IFacing>();
+			var altitude = new float2(0, self.Trait<IMove>().Altitude);
+
+			float2 pos = self.CenterLocation - Combat.GetTurretPosition(self, facing, ContrailTurret) - altitude;
+		
+			positions.Add(pos);
+
+			if (positions.Count >= TrailLength)
+			{
+				positions.RemoveAt(0);
+			}
+		}
+
+		public void RenderAfterWorld(WorldRenderer wr, Actor self)
+		{
+			Color trailStart = TrailColor;
+			Color trailEnd = Color.FromArgb(trailStart.A - 255 / TrailLength, trailStart.R,
+											trailStart.G, trailStart.B);
+
+			for (int i = positions.Count - 1; i >= 1; --i)
+			{
+				var conPos = positions[i];
+				var nextPos = positions[i - 1];
+				ShroudRenderer shroud = null;
+
+				// LocalPlayer is null on shellmap
+				if (self.World.LocalPlayer != null)
+				{
+					shroud = self.World.LocalPlayer.Shroud;
+				}
+
+				if (shroud == null ||
+					shroud.IsVisible(OpenRA.Traits.Util.CellContaining(conPos)) ||
+					shroud.IsVisible(OpenRA.Traits.Util.CellContaining(nextPos)))
+				{
+					Game.Renderer.LineRenderer.DrawLine(conPos, nextPos, trailStart, trailEnd);
+
+					trailStart = trailEnd;
+					trailEnd = Color.FromArgb(trailStart.A - 255 / positions.Count, trailStart.R,
+												trailStart.G, trailStart.B);
+				}
+			}
+		}
+	}
+}