* @param       x3      x-coordinate of the ending point (= new current point)
     * @param       y3      y-coordinate of the ending point (= new current point)
     */

    public void curveFromTo(final float x1, final float y1, final float x3, final float y3) {
    	if (inText) {
    		throw new IllegalPdfSyntaxException(MessageLocalization.getComposedMessage("path.construction.operator.inside.text.object"));
    	}
        content.append(x1).append(' ').append(y1).append(' ').append(x3).append(' ').append(y3).append(" y").append_i(separator);
    }