Add examples project.

src/Triangle.Examples/Generate.cs

@@ -0,0 +1,75 @@
+
+namespace TriangleNet
+{
+    using System;
+    using System.Collections.Generic;
+    using TriangleNet.Geometry;
+
+    static class Generate
+    {
+        private const int RANDOM_SEED = 63841;
+
+        public static List<Vertex> RandomPoints(int n, Rectangle bounds,
+            int seed = RANDOM_SEED)
+        {
+            var points = new List<Vertex>(n);
+
+            var xmin = bounds.Left;
+            var ymin = bounds.Bottom;
+
+            var width = bounds.Width;
+            var height = bounds.Height;
+
+            var random = new Random(seed);
+
+            for (int i = 0; i < n; i++)
+            {
+                double x = random.NextDouble();
+                double y = random.NextDouble();
+                points.Add(new Vertex(xmin + x * width, ymin + y * height));
+            }
+
+            return points;
+        }
+
+        public static Contour Rectangle(double left, double top,
+            double right, double bottom, int mark = 0)
+        {
+            var points = new List<Vertex>(4);
+
+            points.Add(new Vertex(left, top, mark));
+            points.Add(new Vertex(right, top, mark));
+            points.Add(new Vertex(right, bottom, mark));
+            points.Add(new Vertex(left, bottom, mark));
+
+            return new Contour(points, mark, true);
+        }
+
+        /// <summary>
+        /// Create a circular contour.
+        /// </summary>
+        /// <param name="r">The radius.</param>
+        /// <param name="center">The center point.</param>
+        /// <param name="h">The desired segment length.</param>
+        /// <param name="label">The boundary label.</param>
+        /// <returns>A circular contour.</returns>
+        public static Contour Circle(double r, Point center, double h, int label = 0)
+        {
+            int n = (int)(2 * Math.PI * r / h);
+
+            var points = new List<Vertex>(n);
+
+            double x, y, dphi = 2 * Math.PI / n;
+
+            for (int i = 0; i < n; i++)
+            {
+                x = center.X + r * Math.Cos(i * dphi);
+                y = center.Y + r * Math.Sin(i * dphi);
+
+                points.Add(new Vertex(x, y, label));
+            }
+
+            return new Contour(points, label, true);
+        }
+    }
+}