sclass BoxWithColor implements RenderableWithHints {
  Pt a, b;
  RGB color;
  
  *() {}
  *(Pt *a, Pt *b, RGB *color) {}
  *(Rect r, Color color) {
    a = pt(r.x, r.y); b = pt(r.x2(), r.y2());
    this.color = RGB(color);
  }
  *(Rect rect, int r, int g, int b) {
    this(rect, new Color(r, g, b));
  }
  
  public void renderOn(Graphics2D g, int w, int h) {
    int x1 = min(a.x, b.x), y1 = min(a.y, b.y);
    int x2 = max(a.x, b.x), y2 = max(a.y, b.y);
    fillRect(g, x1, y1, x2-x1+1, y2-y1+1, toColor(color));
  }
  
  public void renderHints(Graphics2D g, int w, int h) {
    int x1 = min(a.x, b.x), y1 = min(a.y, b.y);
    int x2 = max(a.x, b.x), y2 = max(a.y, b.y);
    drawRect(g, x1, y1, x2-x1+1, y2-y1+1, hintColor());
  }
}