class Particle {
  PVector or;
  PVector loc;
  PVector vel;
  PVector acc;
  float ms;
  float distance;
  float timer;

  Particle(PVector a, PVector v, PVector l, PVector o, float ms_) {
    acc = a;
    vel = v;
    loc = l;
    ms = ms_;
    or = o;
    timer = random(400,500);
  }

  void run() {
    update();
    render();
  }

  void update() {
    vel.add(acc);
    loc.add(vel);
    acc = new PVector();
    timer -= 1.0;
  }
 
  void render() {
    stroke(1, 100, 0, 100);
    point(loc.x,loc.y);
  }
 
 void add_force(PVector force) { 
    force.div(ms);
    vel.add(force);
  }  
 
 float getMass() { 
    return ms; 
  }  
  
  PVector getLocation() {
    return loc;
  }
  PVector getOrigin() {
    return or;
  }
  PVector getVelocity() {
    return vel;
  }
  void setLocation(PVector l){
    loc = l;    
  }

  void setAcceleration(PVector a){
    acc = a;
  }


  boolean dead() {
    if (timer <= 0) {
      return true;
    } else {
      return false;
    }
  }
}

  import processing.video.*;
MovieMaker mm;

String s = "";
String sCopy = s;
float xoff = 0.0f;
float w;
float h = 50;
float fpx = 40;
float fpy = 60;
int tempw;

PVector[][] posizioni;
PVector origin;
ArrayList particles = new ArrayList();


void setup()
{
  size(640, 400);
  colorMode(HSB, 360, 100, 100, 100);
  PFont font = loadFont("Standard0757-8.vlw");
  textFont(font, 24); 
  posizioni = new PVector[width][height];
  //mm = new MovieMaker(this, width, height, "drawing.mov", 30, MovieMaker.VIDEO, MovieMaker.LOSSLESS);
}


void draw() {

  background(1, 0, 100, 100);

  fill(1, 100, 100, 1);
  text(s, 40, 100);
  fill(1, 100, 100, 0);
  text(sCopy, 40, 50);

    for (int h = 0; h<particles.size()-1; h++){
      Particle prt = (Particle) particles.get(h);
      prt.run();

      PVector actualVel = prt.getVelocity(); 
      PVector attrito = PVector.mult(actualVel,-0.05); 
      prt.add_force(attrito);

      PVector origLoc = prt.getOrigin();
      PVector diff = PVector.sub(origLoc,prt.getLocation()); 
      diff.normalize(); 
      diff.mult(0.30f); 
      prt.setAcceleration(diff); 
      if(prt.dead()){
        particles.remove(h);
      }
      
      if(mousePressed) {  
         PVector mouseLoc = new PVector(mouseX, mouseY, 0);
         PVector dif2 = PVector.sub(mouseLoc,prt.getLocation()); 
         dif2.normalize(); 
         dif2.mult(1.0f); 
         prt.setAcceleration(dif2); 
      }       
    }  

  //print(get(mouseX, mouseY) + " ");
  //mm.addFrame();
}

void findScanArea(String ss){
  w = int(textWidth(ss));
}




void scan(){
   for(int i=int(fpx); i<int(fpx+w); i++) {
    for(int j = int(fpy); j<int(fpy+h); j++) {
      if(get(i,j) == -258){

          posizioni[i][j] = new PVector(i,j,0);
          origin = new PVector(posizioni[i][j].x, 100 + posizioni[i][j].y, 0);
          PVector a = new PVector();
          PVector v = new PVector();
          PVector l = new PVector(random(width), random(height), 0);
          particles.add(new Particle(a,v,l, origin, random(0.5f, 1.0f))); 
        
      }
    }
   }
}

void keyPressed(){
  //if(s.length() <= 35){
  if(textWidth(s) <= 560){
  s += key;
  fpx += tempw;
  sCopy = s.substring(s.length()-1); 
  tempw = int(textWidth(sCopy)); 
  }
  else {
    s = "";
    sCopy = s;
    fpx = 40;
    tempw = int(textWidth(sCopy));
  }
  if((key == DELETE) || (key == BACKSPACE))
  { 
   mm.finish();
  }               
}
void keyReleased(){
  findScanArea(s);
  scan();
}