Game Maker - Easing Curves

Do you like the lerp function? Did you ever wish there were ways to interpolate between two numbers in non-linear manners? Do you like easing curves? Here's a bit of easy-to-use easing curve code.

Usage (and uses)

I put this together for use in animation. There are probably other uses for these, feel free to be creative about them. All of the scripts take the same argument list, which is 

ease(value_start, value_end, fraction, curve_type)

where a fraction value of 0 produces value_start, a fraction value of 1 produces value_end and a fraction value in between produces something in the middle, depending on the easing curve. Most of the time that's all you'll use, although if you want to extrapolate you can use fraction values less than zero or greater than one. curve_type can be either the name of one of the animation curve channels or a member of the Easings enum.

Documentation

Can be found here.

Notes

I mentioned animation, but it's important to note that this will not do any animation for you. It just does a little bit of annoying math so that you don't have to.

If you want to visualize what these curves, and some others, look like you might like easings.net. I might make a nice demo program at some point later.

This is also on the marketplace, if you like to collect stuff there. It's several versions out of date because updating stuff on the Marketplace is a nightmare.