affineTransform rotation

[MichYer]

Hi,
I'm trying to understand how the rotation method works.
I have some text which I want rotated and placed in a specific place, the bottom-left of a rectangle which I created.

AffineTransform af = new AffineTransform();
af.translate([COLOR="Red"]0,0[/COLOR]);
af.rotate(Math.toRadians(-45));
FontRenderContext renderContext = new FontRenderContext(null, false, 
false);
s2d.transform(af);
TextLayout layout = new TextLayout("15 march",s2d.getFont
(),renderContext);
layout.draw(s2d, [COLOR="red"]0, 0[/COLOR]);

I want to be able to add more text aligned to this one and I'd like to understand what general coordinates I need to use to get it right.

Thank you
Mich