PFont font;
Draggable a,b;
int scanCount = 0;
String octantLocale = "";
void setup(){
  size (400,400);
a = new Draggable (100, 100, 10, #FFFF99, #00FF00, "ellipse", "point a");
b = new Draggable (120, 120, 10, #FFFF99, #00FF00, "ellipse", "point b");
  font = loadFont("Kartika-25.vlw");
  textFont(font,25);
  background (255);
  ellipseMode(CENTER);
  rectMode(CENTER);
}
void draw(){
  background(0);
  grid();
  loadPixels();
bline(a.x,a.y,b.x,b.y,#000000);
  a.draw();
  b.draw();
  a.update();
  b.update();
  fill(255);
  text("Bresenham algorithm pixel scanner",20,20);
  text(octantLocale,40,40);
  text("pixels encountered: "+scanCount,60,60);
  scanCount = 0;
}
void grid(){
  stroke(0,0,255);
  for (int i = 0; i < width; i+=20){
    line(0,i,width,i);
    line(i,0,i,height);
  }
}