more refactoring

Sledgemapper/Utils.cs

@@ -0,0 +1,20 @@
+using Microsoft.Xna.Framework;
+using Sledgemapper.Shared.Entities;
+using System;
+
+namespace Sledgemapper
+{
+    public static class Utils
+    {
+        private static float Sign(Point p1, Point p2, Point p3) { return (p1.X - p3.X) * (p2.Y - p3.Y) - (p2.X - p3.X) * (p1.Y - p3.Y); }
+
+        public static bool PointInTri(Point pt, Point v1, Point v2, Point v3)
+        {
+            bool b1, b2, b3;
+            b1 = Sign(pt, v1, v2) < 0.0f;
+            b2 = Sign(pt, v2, v3) < 0.0f;
+            b3 = Sign(pt, v3, v1) < 0.0f;
+            return ((b1 == b2) && (b2 == b3));
+        }
+    }
+}