import processing.video.*;

// size of the capture
int w = 640;
int h = 480;

// capture variables
Capture cm;
String cam;

// font variables;
PFont font;
// text grid
int horizSpace = 12;
int vertSpace = 12;

// some letters ordered by density
String [] letters = {"k", "h", "n", "j", "i", ";",  "."}; 

void setup() {
  size(w, h);
  framerate(30);
  noStroke();
  fill(0);
  background(255);
  
  //println(Capture.list());
  
  // init capture
  //cam = "Creative WebCam Live! Pro-WDM";
  cm = new Capture (this, w, h, 30);
  
  // load font
  font = loadFont("sansserif-12.vlw");
  textFont(font);


}

void captureEvent(Capture cm) {
  cm.read();
}

void draw() {
  // draw capture to screen
  
  //image(cm, 0, 0);
  background(255);
  
  for (int i = 0; i < w; i+= horizSpace) {
    for (int j = 0; j < w; j+= vertSpace) {
      
      float thisBrightness = brightness(cm.get(i, j));
    
      String thisLetter = chooseLetter(thisBrightness);
      text(thisLetter, i, j, horizSpace, vertSpace);
    }  
  } 
  saveFrame(); 
}

String chooseLetter(float br) {  
  String letter = "";
  int difInValue = 40;
  int thisValue = 0;
  int oldValue = thisValue;
  int counter = 0;
  for (int b = 0; b < 255; b += difInValue) {
    thisValue += difInValue;  
        
    if (br > oldValue && br < thisValue) {
      letter = letters[counter];  
      
    } 
    counter++;
    oldValue = thisValue;
    
  }
  return letter;
}