So, based on that, I can cobble together a multiplier for up and right so that
the object never looks any wider than the screen (for any values I've tested).
Do you need the apparent size to remain constant?
Do you need it to be FULL width all the time?
Because that last one is challenging.
https://www.youtube.com/watch?v=mxhxL1LzKww
Do you need it to be less than the image_height as well so that it's "full
screen" and not "full width"?
