Add pretty colors and new functions into the math types.

Quik/QuikGeometry.cs

@@ -130,6 +130,15 @@ namespace Quik
             A = (byte)((hexCode >> 0 ) & 0xFF);
         }
         public QuikColor(int hexCode) : this((uint)hexCode) { }
+
+        public static readonly QuikColor Black = new QuikColor(0, 0, 0, 255);
+        public static readonly QuikColor Red = new QuikColor(255, 0, 0, 255);
+        public static readonly QuikColor Green = new QuikColor(0, 255, 0, 255);
+        public static readonly QuikColor Blue = new QuikColor(0, 0, 255, 255);
+        public static readonly QuikColor Yellow = new QuikColor(255, 255, 0, 255);
+        public static readonly QuikColor Cyan = new QuikColor(0, 255, 255, 255);
+        public static readonly QuikColor Magenta = new QuikColor(255, 0, 255, 255);
+        public static readonly QuikColor White = new QuikColor(255, 255, 255, 255);
     }
 
     /// <summary>
@@ -214,9 +223,17 @@ namespace Quik
         {
             float T = 1 - t;
             return
+                (
                     3 * T * T * (ControlA - Start) +
                     6 * T * t * (ControlB - ControlA) +
-                3 * t * t * (End - ControlB);
+                    3 * t * t * (End - ControlB)
+                ).Normalize();
+        }
+
+        internal QuikVec2 GetBezierNormal(float t)
+        {
+            QuikVec2 tangent = GetBezierTangent(t);
+            return new QuikVec2(-tangent.Y, tangent.X);
         }
     }
 
@@ -249,6 +266,16 @@ namespace Quik
             End.X = endX;
             End.Y = endY;
         }
+
+        public QuikVec2 Normal()
+        {
+            QuikVec2 tangent = Tangent();
+            return new QuikVec2(-tangent.Y, tangent.X);
+        }
+        public QuikVec2 Tangent()
+        {
+            return (End - Start).Normalize();
+        }
     }
 
     /// <summary>