class Particle
{
  float x, y,z, vx, vy,vz, a, grav, bouncy, xdrag,ox,oy,dx,offx;
  float age,life,noffset;
  float agelimit = 500;
  
  Particle(float xpos, float ypos, float area)
  {
    x = xpos;
    offx = random(-100,100);
    y = ypos;
    ox = xpos;
    oy = ypos;
    a = area;
    age = 0;
    vx = random(-8,8);
    vy = random(-8,8);
    grav = random(.1,.4);
    bouncy = random(-.7);
    xdrag = random(.5,.9);
    noffset =0;
  }
  void offset()
  {
    noffset+=1000;
  }
  void pulse()
  {
    a = (in.left.get(2)*200)+10;
  }
  void move()
  {
    noffset+=.04;
    if(age < agelimit)
    {
    age++;
    }
   // life = age/agelimit;
    //println(life);
    //vy+=((grav*.1)*(1-life)) ;
    vx*=xdrag;
    vy*=xdrag;
     vx+=(noise(x/y+noffset*3,y/x+noffset*3)-.475)*1.5;
     vy+=(noise(y/x+noffset*3,x/y+noffset*3)-.475)*1.5;
    // vz+=(noise(y/x+noffset,y/x+noffset)-.5)*.01;
     
   // vx+=noise(x*.01+noffset,this.y*.01+noffset)-.5;
    //vy+=noise(this.y*.01+noffset,this.x*.01+noffset)-.45;
    x+=vx;
    y+=vy;
    z+=vz;
    //a = (in.left.get(2)*200)+10;
    if(y > height)
    {
      y = height-1;
      vy*=bouncy;
      vx+=random(-3,3);
    }
    if(y < 0)
    {
      y = 0;
      vy*=bouncy;
    }
    if(x > width)
    {
    x = width;
    vx*=bouncy;
    }
    if(x < 0)
    {
    x = 0;
    x*=bouncy;
    }  

}
  
 //-----------------------slide------------------------------ 
  void slide()
  {
    x-=.2;
    ox-=.2;
     pushMatrix();
    translate(x,y,0);
    noStroke();
    fill(0,10);
    rectMode(CENTER);
    rect(0,0,a,a);
    noFill();
    popMatrix();
if(x < 0)
{
  dx = ox -x;
  x = width;
  ox = x+dx;
}
}
  
  
  
  void display()
  {
    pushMatrix();
    translate(x,y,0);
    noStroke();
    fill(0,10);
    rectMode(CENTER);
    rect(0,0,a,a);
    noFill();
    popMatrix();
    stroke(0,20);
    line(x,y,ox,oy);
    line(x,y,ox+offx,oy);
  }
  
  
  
  
}