class FunnelRight
{
  private float x, y, w, h, shootY, iEdgeLength, OLEdgeLength, OREdgeLength;
  
  FunnelRight(float _x, float _y, float _w)
  {
    x = _x;
    y = _y;
    w = _w;
    h = 60;
    shootY = y + (h-5);
    iEdgeLength = dist(x - w/2, y, x, shootY);
    OLEdgeLength = dist(x - w/2, y, x, y + h);
    OREdgeLength = dist(x + w/2, y, x, y + (h-10));
  }
  
  void collide(Pebble peb)
  {
    float distILS = dist(peb.x(), peb.y(), x - w/2, y) + dist(peb.x(), peb.y(), x, shootY);
    float distIRS = dist(peb.x(), peb.y(), x + w/2, y) + dist(peb.x(), peb.y(), x, shootY);
    float distOLS = dist(peb.x(), peb.y(), x - w/2, y) + dist(peb.x(), peb.y(), x - 5, y + h);
    float distORS = dist(peb.x(), peb.y(), x + w/2, y) + dist(peb.x(), peb.y(), x + 5, y + h);
    // if peb is too close to the edge, move it to the center of the funnel
    if ( distILS - iEdgeLength < 5 || distIRS - iEdgeLength < 5 )
    {
      peb.moveTo(x, peb.y());
      peb.setVelocity(0, peb.vy());
    }
    if ( distOLS - OLEdgeLength < 3 || distORS - OREdgeLength < 3 )
    {
      peb.setVelocity(-peb.vx()*2, peb.vy());
    }
    // if peb is close enough to the joint, move to the edge of the spout and
    // send it flying
    if ( dist(peb.x(), peb.y(), x, shootY) < 5 )
    {
      peb.moveTo(x + 25, shootY);
      peb.setVelocity(20, 0);
    }
  }
  
  void move(int d)
  {
    float s = 5;
    switch(d)
    {
      case 1: y -= s; break;
      case 2: x += s; break;
      case 3: y += s; break;
      case 4: x -= s; break;
    }
    if ( x < w/2 ) x = w/2;
    else if ( x > width - w/2 ) x = width - w/2;
    if ( y < 0 ) y = 0;
    else if ( y > height - h ) y = height - h;
    shootY = y + (h-5);
  }
  
  void render()
  {
    stroke(0);
    fill(68, 99, 99, 128);
    beginShape();
    vertex(x + w/2, y);
    vertex(x + 5, y + (h - 10));
    vertex(x + 25, y + (h - 10));
    vertex(x + 25, y + h);
    vertex(x - 5, y + h);
    vertex(x - w/2, y);
    endShape();
  }
}

class FunnelLeft
{
  private float x, y, w, h, shootY, iEdgeLength, OLEdgeLength, OREdgeLength;
  
  FunnelLeft(float _x, float _y, float _w)
  {
    x = _x;
    y = _y;
    w = _w;
    h = 60;
    shootY = y + (h-5);
    iEdgeLength = dist(x - w/2, y, x, shootY);
    OREdgeLength = dist(x - w/2, y, x, y + h);
    OLEdgeLength = dist(x + w/2, y, x, y + (h-10));
  }
  
  void collide(Pebble peb)
  {
    float distIRS = dist(peb.x(), peb.y(), x - w/2, y) + dist(peb.x(), peb.y(), x, shootY);
    float distILS = dist(peb.x(), peb.y(), x + w/2, y) + dist(peb.x(), peb.y(), x, shootY);
    float distORS = dist(peb.x(), peb.y(), x - w/2, y) + dist(peb.x(), peb.y(), x - 5, y + h);
    float distOLS = dist(peb.x(), peb.y(), x + w/2, y) + dist(peb.x(), peb.y(), x + 5, y + h);
    // if peb is too close to the edge, move it to the center of the funnel
    if ( distILS - iEdgeLength < 5 || distIRS - iEdgeLength < 5 )
    {
      peb.moveTo(x, peb.y());
      peb.setVelocity(0, peb.vy());
    }
    if ( distOLS - OLEdgeLength < 3 || distORS - OREdgeLength < 3 )
    {
      peb.setVelocity(-peb.vx()*2, peb.vy());
    }
    // if peb is close enough to the joint, move to the edge of the spout and
    // send it flying
    if ( dist(peb.x(), peb.y(), x, shootY) < 5 )
    {
      peb.moveTo(x - 25, shootY);
      peb.setVelocity(-20, 0);
    }
  }
  
  void move(int d)
  {
    float s = 5;
    switch(d)
    {
      case 1: y -= s; break;
      case 2: x += s; break;
      case 3: y += s; break;
      case 4: x -= s; break;
    }
    if ( x < w/2 ) x = w/2;
    else if ( x > width - w/2 ) x = width - w/2;
    if ( y < 0 ) y = 0;
    else if ( y > height - h ) y = height - h;
    shootY = y + (h-5);
  }
  
  void render()
  {
    stroke(0);
    fill(68, 99, 99, 128);
    beginShape();
    vertex(x - w/2, y);
    vertex(x - 5, y + (h - 10));
    vertex(x - 25, y + (h - 10));
    vertex(x - 25, y + h);
    vertex(x + 5, y + h);
    vertex(x + w/2, y);
    endShape();
  }
}