class Particle
{
  public float x = 0;
  public float y = 0;
  public float vx = 0;
  public float vy = 0;
  public float k = .01;
  public float er = random(1,8);
  public boolean lines = false;

  public void Particle()
  {
  }
  public void move1()
  {
    float dx = mouseX - x;
    float dy = mouseY - y;
    float dist = sqrt(dx*dx + dy*dy);
    if(dist < 150)
    {
      float tx = mouseX + dx / dist * 20;
      float ty = mouseY + dy / dist * 20;
      vx += (tx - x) * k;
      vy += (ty - y) * k;
    }
    vx += random(-1, 1);
    vy += random(-1, 1);
    vx *= .95;
    vy *= .95;
    x += vx;
    y += vy;
    if(x > w)
    {
      x = w;
      vx *= -1;
    }
    if(x<0)
    {
      x = 0;
      vx *= -1;
    }
    if(y > h)
    {
      y = h;
      vy *= -1;
    }
    if(y < 0)
    {
      y = 0;
      vy *= -1;
    }
  }
  public void move2()
  {
    float dx = mouseX - x;
    float dy = mouseY - y;
    float distSQ = dx*dx + dy*dy;
    float dist = sqrt(distSQ);
    float force = 500 / distSQ;
    vx += force * dx / dist;
    vy += force * dy / dist;
    vx += random(-1, 1);
    vy += random(-1, 1);
    vx *= .95;
    vy *= .95;
    x += vx;
    y += vy;
    if(x > w)
    {
      x = w;
      vx *= -1;
    }
    if(x<0)
    {
      x = 0;
      vx *= -1;
    }
    if(y > h)
    {
      y = h;
      vy *= -1;
    }
    if(y < 0)
    {
      y = 0;
      vy *= -1;
    }
  }

  public void render1()
  { 
    if(lines)
    {
      stroke(b,c,d,20);
      line(x, y, x-vx, y-vy);
      float sw1 = random(1,3);
      //float sw1 = noise(0)*3;
      strokeWeight(sw1);
      line(x, y, x-vx, y-vy);
      float sw2 = random(1,6);
      //float sw2 = noise(0)*6;
      strokeWeight(sw2);
      line(x, y, x-vx, y-vy);
      float sw3 = random(1,9);
      //float sw3 = noise(0)*9;
      strokeWeight(sw3);
      line(x, y, x-vx, y-vy);
    }
    else
    {
      noStroke();
      fill(b,c,d,10);
      float e1=random(3,30);
      ellipse(x,y,e1,e1);
      float e2= random(3,18);
      ellipse(x,y,e2,e2);
      float e3= random(3,9);
      ellipse(x,y,e3,e3);
      ellipse(x,y,3,3);
    }
  }

  public void render2()  
  {
    if(lines)
    { 
      strokeWeight(1);
      stroke(b,c,d);
      line(x, y, x-vx, y-vy);
    }
    else
    {
      noStroke();
      fill(b,c,d,30);
      ellipse(x,y,er,er);
    }
  }
}