public BufferedImage getImage(RenderingHints rh) {
        if (needReDraw) {
            image = new BufferedImage(size, size, BufferedImage.TYPE_4BYTE_ABGR);
            Graphics2D g = image.createGraphics();
            if(rh!=null)g.setRenderingHints(rh);
            g.rotate(angle);
            for (int i = 0; i < color.length; i++) {
                g.setColor(new Color(color[i][0], color[i][1], color[i][2]));
                g.fillPolygon(pointX[i], pointY[i], pointX[i].length);
            }
            needReDraw = false;
        }
        return image;
    }

    public void rotate(int angle){
        this.angle = Math.toRadians(angle);
        needReDraw = true;
    }

    @Override
    public void draw(Graphics2D g) {
        g.drawImage(getImage(g.getRenderingHints()), 0, 0, null);
    }