Fireworks #1

gistfile1.txt

/*
 * [021] Fireworks #1
 *
 * 2013 [+++] @tinytintoto
 */
ArrayList<Fire> fires = new ArrayList<Fire>();
int initialSize;
float sleshold = 0.5;

void setup(){
   size(500, 280);
   frameRate(30);

   noStroke();
   
   rectMode(CENTER);
   
   initialSize = floor( min( width, height ) / 10 );

   fires.add( new Fire(
             new PVector( width / 2, height / 10 * 7 ),
             new PVector( 0, -(height / 80) ),
             initialSize,
             color( 255 ),
             8
       )
   );
}

void draw(){
   background( 0 );
   for( int i = fires.size() - 1; i >= 0; i-- ){
       Fire f = (Fire) fires.get(i);
       f.update();
       if( f.siz < sleshold ){
             fires.remove(i);
       }
   }
}

class Fire{
   int dev, life;
   float siz;
   PVector pos, velo;
   color col;
   Fire( PVector p, PVector v, float s, color c, int d ){
       pos = p;
       velo = v;
       siz = s;
       col = c;
       dev = d;
       life = 100;
   }

   void update(){
       pushMatrix();
         translate( pos.x, pos.y );
         fill(col);
         rect( 0, 0, siz, siz );
       popMatrix();
       life--;
       switch(life){
           case 80:
             devide();
             break;
       }
       
       siz*=0.98;
       
       pos.add(velo);
   }

   void devide(){
       PVector v = new PVector( velo.x, velo.y );
       for( int i = 0; i < dev; i++ ){
           fires.add( new Fire(
                   new PVector( pos.x, pos.y ),
                   new PVector( v.x, v.y),
                   siz,
                   col,
                   dev - 1
             )
           );
           v.rotate(TWO_PI / dev );
       }
       if( dev > 0 ){
         siz = 0;
       }
   }
}