sets the alignment horizontally for text
$.text.alignment.x
Examples
function update() {
$.text.size = 20;
$.shape.line($.w/2, 0, $.w/2, $.h);
$.text.alignment.x = "left";
$.text.print($.w/2, $.h/2-50, "left");
$.text.alignment.x = "center";
$.text.print($.w/2, $.h/2, "center");
$.text.alignment.x = "right";
$.text.print($.w/2, $.h/2+50, "right");
}