docstring

    }

}

module two_line_text(message1="", message2="", shift_up=10, size=14, halign="center", font=undef){

/* Make a 2-line text message

Defaults to a single line if the second line is empty

param message1: top line message string

param message1: bottom line message string. Can be empty or undef

param shift_up: optionally shift the message up when there are two lines, e.g. to keep vertical centre

param size: type size - as defined in OpenSCAD text()

param halign: horizontal text alignment - as defined in OpenSCAD text() 

param font: OpenSCAD font

*/

module two_line_text(message1="", message2="", shift_up=0, size=14, halign="center", font=undef){

    up = ((message2=="") || (is_undef(message2)))? 0 : shift_up;

    font_def = if_undefined_set_default(font, "Liberation Sans");

    spacing = size * 1.43;