refactoring, tests

Author: GrabTheScreen

.nuget/packages.config

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+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="NUnit3TestAdapter" version="3.6.0" />
+</packages>

Component1.Designer.cs

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+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Diagnostics;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace WpfApplication4
+{
+    public partial class Component1 : Component
+    {
+        public Component1()
+        {
+            InitializeComponent();
+        }
+
+        public Component1(IContainer container)
+        {
+            container.Add(this);
+
+            InitializeComponent();
+        }
+    }
+}

Component1.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace WpfApplication4.Geometry.Elements
+{
+    public class Line2d
+    {
+        /// <summary>
+        /// Position Vector of line.
+        /// </summary>
+        /// <value>Position Vector</value>
+        public Vector2d A { get; set; }
+
+        /// <summary>
+        /// Direction Vector of the line.
+        /// B - A
+        /// </summary>
+        /// <value>The direction.</value>
+        public Vector2d R { get; set; }
+
+        public Line2d(Vector2d position, Vector2d direction)
+        {
+            A = position;
+            R = direction;
+        }
+    }
+}

Geometry/Elements/Line2d.cs

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+using System;
+using System.Linq;
+using System.Text;
+using System.Collections.Generic;
+
+namespace WpfApplication4.Geometry.Elements
+{
+	public class Polygon2d
+	{
+		public List<Vector2d> Points { get; set; } 
+
+		public Polygon2d ()
+		{
+            Points = new List<Vector2d>();
+		}
+
+        public override string ToString()
+        {
+            StringBuilder sb = new StringBuilder();
+
+            foreach (var item in Points)
+            {
+                sb.Append(item.ToString());
+            }
+
+            return sb.ToString();
+        }
+	}
+}

Geometry/Elements/Polygon2d.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace WpfApplication4.Geometry.Elements
+{
+    public class Rectangle2d
+    {
+        public Vector2d Location { get; set; }
+
+        public Vector2d Size { get; set; }
+
+        public Rectangle2d()
+        {
+        }
+
+        public Rectangle2d(Vector2d a, Vector2d c)
+            : this()
+        {
+            Location = a;
+            Size = c - a;
+        }
+
+        public double Area()
+        {
+            return Size.X * Size.Y;
+        }
+
+        public Vector2d[] Points
+        {
+            get
+            {
+                return new[] {
+					new Vector2d (Location.X, Location.Y),
+					new Vector2d (Location.X + Size.X, Location.Y),
+					new Vector2d (Location.X + Size.X, Location.Y + Size.Y),
+					new Vector2d (Location.X, Location.Y + Size.Y)
+				};
+            }
+        }
+    }
+}

Geometry/Elements/Rectangle2d.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace WpfApplication4.Geometry.Elements
+{
+    public class Segment2d : Line2d
+    {
+        /// <summary>
+        /// Second Point of Line.
+        /// </summary>
+        /// <value>The b.</value>
+        public Vector2d B { get; set; }
+
+        public Segment2d(Vector2d point1, Vector2d point2) :
+            base(point1, point2 - point1)
+        {
+            B = point2;
+        }
+
+        public double Length()
+        {
+            return Math.Abs(A.Distance(B));
+        }
+
+        public override string ToString()
+        {
+            return string.Format("[Segment2d: A={0} B={1}]", A, B);
+        }
+    }
+}