class Edge {
  Node from;
  Node to;
  float len;
  float weight;
  
  Edge(Node from, Node to) {
    this.from = from;
    this.to = to;
    this.len = 50;
  }

  Edge(Node from, Node to, float weight) {
    this.from = from;
    this.to = to;
    this.len = 50.0*(1.0-weight);
    println(len);
    this.weight = weight;
}

  int count;

  void increment(  ) {
    count++;
  }

  void relax(  ) {
    float vx = to.x - from.x;
    float vy = to.y - from.y;
    float d = mag(vx, vy);
    if (d > 0) {
      float f = (len - d) / (d * 3);
      float dx = f * vx;
      float dy = f * vy;
      to.dx += dx;
      to.dy += dy;
      from.dx -= dx;
      from.dy -= dy;
    }
  }

  void draw(  ) {
    stroke(edgeColor);
    //strokeWeight(0.35);
    strokeWeight(weight);
    line(from.x, from.y, to.x, to.y);
  }
}