Update examples.

src/Triangle.Examples/Examples/Example1.cs

@@ -11,7 +11,7 @@ namespace TriangleNet.Examples
     /// </summary>
     public class Example1
     {
-        public static void Run(bool print = false)
+        public static bool Run(bool print = false)
         {
             // Generate points.
             var points = Generate.RandomPoints(50, new Rectangle(0, 0, 100, 100));
@@ -26,6 +26,8 @@ namespace TriangleNet.Examples
             var mesh = mesher.Triangulate(points);
 
             if (print) SvgImage.Save(mesh, "example-1.svg", 500);
+
+            return true;
         }
     }
 }

src/Triangle.Examples/Examples/Example10.cs

@@ -18,7 +18,7 @@ namespace TriangleNet.Examples
         /// <summary>
         /// Reads all .poly files from given directory and processes them in parallel.
         /// </summary>
-        public static void Run(string dir)
+        public static bool Run(string dir)
         {
             var files = Directory.EnumerateFiles(dir, "*.poly", SearchOption.AllDirectories);
 
@@ -75,6 +75,8 @@ namespace TriangleNet.Examples
             {
                 Console.WriteLine("   Number of invalid triangulations: {0}", invalid);
             }
+
+            return true;
         }
 
         private static void ProcessMesh(IMesh mesh, MeshResult result)

src/Triangle.Examples/Examples/Example2.cs

@@ -9,7 +9,7 @@
     /// </summary>
     public static class Example2
     {
-        public static void Run(bool print = false)
+        public static bool Run(bool print = false)
         {
             // Generate the input geometry.
             var poly = CreatePolygon();
@@ -21,6 +21,8 @@
             var mesh = poly.Triangulate(quality);
 
             if (print) SvgImage.Save(mesh, "example-2.svg", 500);
+
+            return true;
         }
 
         public static IPolygon CreatePolygon(double h = 0.2)

src/Triangle.Examples/Examples/Example3.cs

@@ -12,12 +12,14 @@ namespace TriangleNet.Examples
     /// </summary>
     public class Example3
     {
-        public static void Run(bool print = false)
+        public static bool Run(bool print = false)
         {
             // Generate mesh.
             var mesh = CreateMesh();
 
             if (print) SvgImage.Save(mesh, "example-3.svg", 500);
+
+            return true;
         }
 
         public static IMesh CreateMesh()

src/Triangle.Examples/Examples/Example4.cs

@@ -12,7 +12,7 @@ namespace TriangleNet.Examples
     /// </summary>
     public class Example4
     {
-        public static void Run(bool print = false)
+        public static bool Run(bool print = false)
         {
             // Generate the input geometry.
             var poly = CreatePolygon();
@@ -42,6 +42,8 @@ namespace TriangleNet.Examples
             smoother.Smooth(mesh, 5);
 
             if (print) SvgImage.Save(mesh, "example-4.svg", 500);
+
+            return true;
         }
 
         public static IPolygon CreatePolygon()

src/Triangle.Examples/Examples/Example5.cs

@@ -13,7 +13,7 @@ namespace TriangleNet.Examples
     /// </summary>
     public static class Example5
     {
-        public static void Run(bool print = false)
+        public static bool Run(bool print = false)
         {
             var mesh = Example3.CreateMesh();
 
@@ -24,6 +24,8 @@ namespace TriangleNet.Examples
             FindBoundary2(mesh);
 
             if (print) SvgImage.Save(mesh, "example-5-2.svg", 500, true, false);
+
+            return true;
         }
 
         /// <summary>

src/Triangle.Examples/Examples/Example6.cs

@@ -12,14 +12,14 @@
     /// </summary>
     public static class Example6
     {
-        public static void Run()
+        public static bool Run()
         {
             // Generate the input geometry.
             var polygon = new Polygon(8, true);
 
             // Two intersecting rectangles.
-            var A = Generate.Rectangle(0.0, 4.0, 4.0, 0.0, 1);
-            var B = Generate.Rectangle(1.0, 5.0, 3.0, 1.0, 2);
+            var A = Generate.Rectangle(0.0, 0.0, 4.0, 4.0, 1);
+            var B = Generate.Rectangle(1.0, 1.0, 4.0, 4.0, 2);
 
             polygon.Add(A);
             polygon.Add(B);
@@ -46,6 +46,8 @@
 
             // The xor of A and B.
             var xor = mesh.Triangles.Where(t => t.Label == 1 || t.Label == 2);
+
+            return true;
         }
     }
 }

src/Triangle.Examples/Examples/Example7.cs

@@ -14,12 +14,12 @@ namespace TriangleNet.Examples
     {
         const double MAX_EDGE_LENGTH = 0.2;
 
-        public static void Run(bool print = false)
+        public static bool Run(bool print = false)
         {
             var poly = new Polygon();
 
             // Generate the input geometry.
-            poly.Add(Generate.Rectangle(0.0, 1.0, 1.0, 0.0));
+            poly.Add(Generate.Rectangle(0.0, 0.0, 1.0, 1.0));
 
             // Set minimum angle quality option, ignoring holes.
             var quality = new QualityOptions()
@@ -42,6 +42,8 @@ namespace TriangleNet.Examples
             }
 
             if (print) SvgImage.Save(mesh, "example-7.svg", 500);
+
+            return true;
         }
 
         static bool MaxEdgeLength(ITriangle tri, double area)

src/Triangle.Examples/Examples/Example8.cs

@@ -12,11 +12,13 @@ namespace TriangleNet.Examples
     /// </summary>
     public class Example8
     {
-        public static void Run()
+        public static bool Run()
         {
             var mesh = (Mesh)Example3.CreateMesh();
 
             FindAdjacencyMatrix(mesh);
+
+            return true;
         }
 
         private static void FindAdjacencyMatrix(Mesh mesh)

src/Triangle.Examples/Examples/Example9.cs

@@ -11,7 +11,7 @@ namespace TriangleNet.Examples
     /// </summary>
     public class Example9
     {
-        public static void Run(bool print = false)
+        public static bool Run(bool print = false)
         {
             var pts = new List<Vertex>
             {
@@ -56,6 +56,8 @@ namespace TriangleNet.Examples
                 // Random rotation.
                 poly = Rotate(pts, Math.PI * r.NextDouble());
             }
+
+            return true;
         }
 
         /// <summary>

src/Triangle.Examples/Generate.cs

@@ -7,10 +7,9 @@ namespace TriangleNet
 
     static class Generate
     {
-        private const int RANDOM_SEED = 63841;
+        private static readonly Random random = new Random(63841);
 
-        public static List<Vertex> RandomPoints(int n, Rectangle bounds,
-            int seed = RANDOM_SEED)
+        public static List<Vertex> RandomPoints(int n, Rectangle bounds)
         {
             var points = new List<Vertex>(n);
 
@@ -20,8 +19,6 @@ namespace TriangleNet
             var width = bounds.Width;
             var height = bounds.Height;
 
-            var random = new Random(seed);
-
             for (int i = 0; i < n; i++)
             {
                 double x = random.NextDouble();
@@ -32,17 +29,68 @@ namespace TriangleNet
             return points;
         }
 
-        public static Contour Rectangle(double left, double top,
-            double right, double bottom, int mark = 0)
+        /// <summary>
+        /// Creates a rectangle contour.
+        /// </summary>
+        public static Contour Rectangle(Rectangle rect, double size = 0d, int label = 0)
         {
-            var points = new List<Vertex>(4);
+            return Rectangle(rect.X, rect.Y, rect.Width, rect.Height, size, label);
+        }
 
-            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));
+        /// <summary>
+        /// Creates a rectangle contour.
+        /// </summary>
+        public static Contour Rectangle(double x, double y, double width, double height,
+            double size = 0d, int label = 0)
+        {
+            // Horizontal and vertical step sizes.
+            double stepH = 0d;
+            double stepV = 0d;
 
-            return new Contour(points, mark, true);
+            int nH = 1;
+            int nV = 1;
+
+            if (size > 0d)
+            {
+                size = Math.Min(size, Math.Min(width, height));
+
+                nH = (int)Math.Ceiling(width / size);
+                nV = (int)Math.Ceiling(height / size);
+
+                stepH = width / nH;
+                stepV = height / nV;
+            }
+
+            var points = new List<Vertex>(2 * nH + 2 * nV);
+
+            double right = x + width;
+            double top = y + height;
+
+            // Left box boundary points
+            for (int i = 0; i < nV; i++)
+            {
+                points.Add(new Vertex(x, y + i * stepV, label));
+            }
+
+            // Top box boundary points
+            for (int i = 0; i < nH; i++)
+            {
+                points.Add(new Vertex(x + i * stepH, top, label));
+            }
+
+            // Right box boundary points
+            for (int i = 0; i < nV; i++)
+            {
+                points.Add(new Vertex(right, top - i * stepV, label));
+            }
+
+            // Bottom box boundary points
+            for (int i = 0; i < nH; i++)
+            {
+                points.Add(new Vertex(right - i * stepH, y, label));
+            }
+
+            return new Contour(points, label, true);
         }
 
         /// <summary>

src/Triangle.Examples/Program.cs

@@ -1,21 +1,32 @@
 
 namespace TriangleNet
 {
+    using System;
     using TriangleNet.Examples;
 
     class Program
     {
         static void Main(string[] args)
         {
-            Example1.Run();
-            Example2.Run();
-            Example3.Run();
-            Example4.Run();
-            Example5.Run();
-            Example8.Run();
-            Example6.Run();
-            Example7.Run();
-            Example9.Run();
+            Check("Example  1", Example1.Run());
+            Check("Example  2", Example2.Run());
+            Check("Example  3", Example3.Run());
+            Check("Example  4", Example4.Run());
+            Check("Example  5", Example5.Run());
+            Check("Example  6", Example8.Run());
+            Check("Example  7", Example6.Run());
+            Check("Example  8", Example7.Run());
+            Check("Example  9", Example9.Run());
+        }
+
+        static void Check(string item, bool success)
+        {
+            var color = Console.ForegroundColor;
+
+            Console.Write(item + " ");
+            Console.ForegroundColor = success ? ConsoleColor.DarkGreen : ConsoleColor.DarkRed;
+            Console.WriteLine(success ? "OK" : "Failed");
+            Console.ForegroundColor = color;
         }
     }
 }

src/Triangle.Examples/Triangle.Examples.csproj

@@ -6,17 +6,9 @@
     <RootNamespace>TriangleNet</RootNamespace>
   </PropertyGroup>
 
-  <ItemGroup>
-    <Compile Include="..\Triangle.Rendering\Text\FormattingStreamWriter.cs" Link="Rendering\FormattingStreamWriter.cs" />
-    <Compile Include="..\Triangle.Rendering\Text\SvgImage.cs" Link="Rendering\SvgImage.cs" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <Folder Include="Rendering\" />
-  </ItemGroup>
-
   <ItemGroup>
     <ProjectReference Include="..\Triangle\Triangle.csproj" />
+    <ProjectReference Include="..\Triangle.Rendering\Triangle.Rendering.csproj" />
   </ItemGroup>
 
 </Project>