sclass Stripes implements MakesBufferedImage {
  int w, h;
  double angle; // radians
  new L<Color> colors;
  new DoubleList positionsInDirection;
  new <DoublePt> pixelPositions;
  
  public BufferedImage getBufferedImage() {
    var img = newBufferedImage(w, h, first(colors));
    var g = graphics(img);
    for (double pos : positionsInDirection) {
      drawPolygon(g, ...)
    }
    ret img;
  }
}