/**
Falling letters by <a href="http://www.local-guru.net/blog/">Guru</a><br/>
press any key to drop them again
*/


PFont font;
float[] posx;
float[] velx;
float[] massx;
char[] letter = new char[]{'H','E','L','L','O'};

void setup() {
  size(300,300);
  font = loadFont("Verdana-48.vlw");
  textFont( font, 48 );
  
  posx = new float[] {0,0,0,0,0}; 
  velx = new float[] {0,0,0,0,0}; 
  massx = new float[] {random(10)+1,random(10)+1,random(10)+1,random(10)+1,random(10)+1}; 
}

void draw() {
  for(int i =0; i < 5; i++) {
    if ( posx[i] + velx[i] > 300 ) {
      posx[i] = 300;
      velx[i] = -velx[i] * 0.5;
    } else {
      posx[i] += velx[i]; 
    } 
     velx[i] += 10 / massx[i];
  }
  
  background(0);
  fill(255);
  
  for( int i=0; i < 5; i++ ) {
    pushMatrix();
    float y = map( i, 0,4, -60,60);
    translate( width/2 + y, posx[i]);
    text(letter[i], 0, 0 );
    popMatrix();
  }
}


void keyPressed() {
  posx = new float[] {0,0,0,0,0}; 
  velx = new float[] {0,0,0,0,0}; 
  massx = new float[] {random(10)+1,random(10)+1,random(10)+1,random(10)+1,random(10)+1};
}