// Learning Processing
  // Daniel Shiffman
  // http://www.learningprocessing.com
  
  // Example 17-4: Text mirror 
  
  import processing.video.*;
  
  // Size of each cell in the grid, ratio of window size to video size
  int videoScale = 14;
  // Number of columns and rows in our system
  int cols, rows;
  // Variable to hold onto capture object
  Capture video;
  
  // The source text used in the mosaic pattern. A longer String might produce more interesting results.
  String chars = "helloworld" ; 
  
  PFont f;
  
  void setup() {
    size(640,480);
    // Set up columns and rows
    cols = width/videoScale;
    rows = height/videoScale;
    video = new Capture(this,cols,rows,15);
    
    // Load the font
    // Using a fixed-width font. In most fonts, individual characters have different widths. 
    // In a fixed-width font, all characters have the same width. 
    // This is useful here since we intend to display the letters one at a time spaced out evenly. 
    // See Section 17.7 for how to display text character by character with a nonfixed width font.
    f = loadFont("Courier-Bold-20.vlw");
  }
  
  void draw() {
    background(0);
    
    // Read image from the camera
    if (video.available()) {
      video.read();
    }
    video.loadPixels();
    
    // Use a variable to count through chars in String
    int charcount = 0;
    // Begin loop for rows
    for (int j = 0; j < rows; j ++ ) {
      // Begin loop for columns
      for (int i = 0; i < cols; i ++ ) {
        
        // Where are we, pixel-wise?
        int x = i*videoScale;
        int y = j*videoScale;
        
        // Looking up the appropriate color in the pixel array
        color c = video.pixels[i + j*video.width];
        // Displaying an individual character from the String instead of a rectangle
        textFont(f);
        fill(c);
        
        // One character from the source text is displayed colored accordingly to the pixel location. 
        // A counter variableâ charcountâ is used to walk through the source String one character at a time.
        text(chars.charAt(charcount),x,y);
        
        // Go on to the next character
        charcount = (charcount + 1) % chars.length();
      }
    }
  }