class Node {
  float x, y;
  String label;
  float radius;
  Node(String label, float x, float y) {
    this.label = label;
    this.x = x;
    this.y = y;
    radius = 7;
  }

  boolean isIn(float xpos, float ypos) {
    return ((x-xpos)*(x-xpos)+(y-ypos)*(y-ypos)) < radius*radius;
  }

  void draw(boolean showLabel) {
    
    if(showLabel) {
      fill(0);
      textAlign(CENTER, CENTER);
      text(label, x, y);  
    }
    fill(nodeColor);
    ellipse(x, y, radius, radius);
  }
}