/* foo!  */
int a;

class mover
{
  float x,y;
  float dh,ds,db;
  
  float dx, dy, dtheta;
  
  mover(int _x, int _y, float _dh, float _ds, float _db)
  {
    x=_x;
    y=_y;
    dh=_dh; // DeltaHue
    ds=_ds; // DelatSaturation
    db=_db; // DeltaBrightnesss
    dx=random(2)-1;
    dy=random(2)-1;
    dtheta=(random(TWO_PI)-PI)/100;
  }
  
  void move()
  {
//    dtheta+=random(0.01)-0.005;
    float a,theta;
    a=sqrt((dx*dx)+(dy*dy));
    a+=random(0.02)-0.01;
    theta=atan2(dy,dx);
    theta+=dtheta;
    dx=a*cos(theta);
    dy=a*sin(theta);
/*    
    dx=dx*cos(theta);
    dy=dy*sin(theta);*/
    
    x+=dx;
    y+=dy;
    if(x>=width)
      x=0;
    if(x<0)
      x=width-1;
    if(y>=height)
      y=0;
    if(y<0)
      y=height-1;
/*    while(x<50)
      x+=100;
    while(x>=150)
      x-=100;
    while(y<50)
      y+=100;
    while(y>=150)
      y-=100;*/
  }
  
  void draw()
  {
    color c=get((int)x,(int)y);
    float h,s,b;
    h=hue(c);
    s=saturation(c);
    b=brightness(c);
    h+=dh;
    if(h>360)
      h-=360;
    if(h<0)
      h+=360;
    s+=ds;
    b+=db;
    set((int)x,(int)y,color(h,s,b));
  }
}

void blur(int tt) 
{
  for(int i=0;i<(width*height)/20;i++)
  {
    int x=(int)random(width-2)+1;
    int y=(int)random(height-2)+1;
    int dx=0,dy=0;
    if(random(2)<1)
      dx=1;
    else
      dy=-1;
    if(random(2)<1)
      dy=1;
    else
      dy=-1;
      
    int r=pixels[x+y*width]&255;
    int g=(pixels[x+y*width]>>8)&255;
    int b=(pixels[x+y*width]>>16)&255;
    r+=pixels[x+dx+(y+dy)*width]&255;
    g+=(pixels[x+dx+(y+dy)*width]>>8)&255;
    b+=(pixels[x+dx+(y+dy)*width]>>16)&255;
    r/=2;
    g/=2;
    b/=2;
    pixels[x+y*width]=r+(g<<8)+(b<<16);
  }
}

mover[] bob;

void setup()
{
  size(300,300);
  colorMode(HSB,360,100,100);
  background(180,0,50);
  bob=new mover[2000];
  for(int i=0;i<bob.length;i++)
  {
    bob[i]=new mover((int)random(width),(int)random(height),random(40)-20,random(30)-10,random(20)-10);
  }
}

void loop()
{
  for(int i=0;i<bob.length;i++)
  {
    bob[i].move();
  }
  for(int i=0;i<bob.length;i++)
  {
    bob[i].draw();
  }
/*  BGraphics sqr=new BGraphics(100,100);
  for(int x=0;x<100;x++)
    for(int y=0;y<100;y++)
      sqr.set(x,y,get(x+50,y+50));
  BImage sqr2=sqr.copy();
  image(sqr2,150,50,100,100);
  image(sqr2,50,150,100,100);
  image(sqr2,150,150,100,100);
  */
  blur(1);
}