class Cloud
{
  PVector pos;
  float radius;
  final PVector shade_dir;
  final PVector shade_perp;
  
  Cloud(PVector p)
  {
    pos = p;
    radius = random(CLOUD_MAX_R - CLOUD_MIN_R)+CLOUD_MIN_R;
    shade_dir = new PVector(cos(SHADE_ANGLE), sin(SHADE_ANGLE));
    shade_perp = new PVector(cos(SHADE_ANGLE+HALF_PI), sin(SHADE_ANGLE+HALF_PI));
  }
  boolean shades(PVector p)
  {
    PVector to = PVector.sub(p, pos);
    if(inRadius(p, pos, radius)) return true;
    if(to.dot(shade_dir) < 0) return false;
    return abs(to.dot(shade_perp)) < radius;
  }
}
class CloudFluff extends Particle
{
  CloudFluff(PVector p)
  {
    super(PVector.add(p, randomVector(random(15))), randomVector(random(1)), 360);
  }
  void tick()
  {
    float d = PVector.dist(pos, player_pos);
    d*= 2;
    d += 1;
    vel.mult(0.95);
    vel.mult(1 - 1/d);
    vel.add(PVector.mult(player_vel, 1/d));
    super.tick();
  }
  void draw()
  {
    noStroke();
    strokeWeight(1);
    fill(255, 255*life/maxlife);
    ellipse(pos.x, pos.y, 10*life/maxlife, 10*life/maxlife);
  }
}