class Node {

  float x,y;
  Vector lines = new Vector();
  
  Node(float x, float y){
    this.x=x; this.y=y;
  }
  
  boolean mouseOver() {
    return sq(x-mouseX)+sq(y-mouseY)<100;
  }
  
  color fill() {
    if (mode == LINE && this.mouseOver()) {
      return #ff0000;
    }
    else if(this == tempLine.a || this == tempLine.b) {
      return #000000;
    }
    else if (lines.size() > 0) {
      return #ffffff;
    }
    else {
      return #000000;
    }
  }
  
  void draw() {
    ellipse(x,y,5,5);    
  }
  
  float distance(Node other) {
    return sqrt(sq(other.x-this.x)+sq(other.y-this.y));
  }
  
}