Image flipping question.
 

I know that you can rotate images, change the size, etc.
What is the code to do a mirror flip on the vertices axis?
(Horizontal flip)

You can achieve it by stretching it negatively. I.e.

stretchx = -1; // this will mirror it horizontally
stretchy = -1; // this will mirror it vertically

Why not just rotate it 180°?

Mirroring and rotating 180 degrees are not the same thing.

Oh right then it would be upside down, sorry.Had a mental blank.