Implemented road & road mesh generator.

Game/Assets/Scripts/Model/Road/RoadSegment.cs

@@ -80,6 +80,33 @@ namespace TransportGame.Model.Road
         [XmlAttribute("lanesTo1")]
         public int LanesTo1 { get; set; }
         
+        /// <summary>
+        /// Gets the direction vector of this road segment
+        /// </summary>
+        [XmlIgnore]
+        public Vector2 Direction
+        {
+            get
+            {
+                if (Terminal1Id == -1 || Terminal2Id == -1 || ParentNetwork == null)
+                    return Vector2.Zero;
+
+                return (Terminal2.Position - Terminal1.Position).Normalized;
+            }
+        }
+
+        /// <summary>
+        /// Gets the road segment as a line segment
+        /// </summary>
+        /// <returns></returns>
+        public LineSegment AsLineSegment()
+        {
+            if (Terminal1Id == -1 || Terminal2Id == -1 || ParentNetwork == null)
+                throw new InvalidOperationException("Terminals are not initialized.");
+
+            return new LineSegment(Terminal1.Position, Terminal2.Position);
+        }
+
         /// <summary>
         /// Initializes road segment
         /// </summary>