Silverlight 2 Beta 1 C# Truchet Tiling

Truchet Tiling is an easy way of creating random patterns. See what it looks like here.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace Truchet3
{
    public partial class Page : UserControl
    {
        public Page()
        {
            InitializeComponent();

            drawTiles(40, Colors.Black);
        }

        private void drawTiles(int numTilesHorizontal, Color color)
        {
            SolidColorBrush stroke = new SolidColorBrush();
            stroke.Color = Colors.Black;

            int tileSize = (int)(Width / (double)numTilesHorizontal);
            int numTilesVertical = (int)Math.Ceiling(Height / (double)tileSize);
            int seed = 0;

            for (int i = 0; i < numTilesHorizontal + 1; i++)
            {
                for (int j = 0; j < numTilesVertical + 1; j++)
                {
                    int x = i * tileSize;
                    int y = j * tileSize;

                    // -- create a time dependend seed
                    DateTime dateTime = new DateTime(1000);
                    dateTime = DateTime.Now;
                    seed += (int)(dateTime.Millisecond);
                    Random random = new Random(seed);
                    int randomNumber = random.Next(0, 2);

                    drawTile1(x, y, tileSize, randomNumber, color);
                }
            }
        }

        private void drawTile1(int x, int y, int tileSize, int randomNumber, Color color)
        {
            double ellipseSize = (double)tileSize;
            double ellipseRadius = ellipseSize * .5;

            double leftPos1 = 0 - ellipseRadius;
            double topPos1 = (randomNumber == 0) ? 0 - ellipseRadius : tileSize - ellipseRadius;

            double leftPos2 = tileSize - ellipseRadius;
            double topPos2 = (randomNumber == 0) ? tileSize - ellipseRadius : 0 - ellipseRadius;

            Canvas canvas = new Canvas();
            canvas.Width = canvas.Height = tileSize;
            canvas.SetValue(Canvas.LeftProperty, x);
            canvas.SetValue(Canvas.TopProperty, y);

            RectangleGeometry rectMask = new RectangleGeometry();
            Rect rect = new Rect();
            rect.Width = rect.Height = tileSize;
            rectMask.Rect = rect;
            canvas.Clip = rectMask;

            SolidColorBrush stroke1 = new SolidColorBrush();
            stroke1.Color = color;

            Ellipse ellipse1 = new Ellipse();
            ellipse1.Width = ellipse1.Height = ellipseSize;
            ellipse1.StrokeThickness = .5;
            ellipse1.Stroke = stroke1;
            ellipse1.SetValue(Canvas.LeftProperty, leftPos1);
            ellipse1.SetValue(Canvas.TopProperty, topPos1);

            canvas.Children.Add(ellipse1);
            Canvas layoutRoot = FindName("LayoutRoot") as Canvas;

            SolidColorBrush stroke2 = new SolidColorBrush();
            stroke2.Color = color;

            Ellipse ellipse2 = new Ellipse();
            ellipse2.Width = ellipse2.Height = ellipseSize;
            ellipse2.StrokeThickness = .5;
            ellipse2.Stroke = stroke2;
            ellipse2.SetValue(Canvas.LeftProperty, leftPos2);
            ellipse2.SetValue(Canvas.TopProperty, topPos2);

            canvas.Children.Add(ellipse2);

            layoutRoot.Children.Add(canvas);
        }
    }
}