Decal system (TODO: add decals for explosions and fire), moved some of the client-specific Hull update logic to the client project

Barotrauma/BarotraumaClient/Source/Particles/DecalPrefab.cs

@@ -0,0 +1,39 @@
+using Microsoft.Xna.Framework;
+using System;
+using System.Collections.Generic;
+using System.Xml.Linq;
+
+namespace Barotrauma.Particles
+{
+    class DecalPrefab
+    {
+        public readonly string Name;
+
+        public readonly List<Sprite> Sprites;
+
+        public readonly Color Color;
+
+        public readonly float LifeTime;
+        public readonly float FadeTime;
+
+        public DecalPrefab(XElement element)
+        {
+            Name = element.Name.ToString();
+
+            Sprites = new List<Sprite>();
+
+            foreach (XElement subElement in element.Elements())
+            {
+                if (subElement.Name.ToString().ToLowerInvariant() == "sprite")
+                {
+                    Sprites.Add(new Sprite(subElement));             
+                }
+            }  
+            
+            Color = new Color(ToolBox.GetAttributeVector4(element, "color", Vector4.One));
+
+            LifeTime = ToolBox.GetAttributeFloat(element, "lifetime", 10.0f);
+            FadeTime = Math.Min(LifeTime, ToolBox.GetAttributeFloat(element, "fadetime", 1.0f));
+        }
+    }
+}