Multiple direction slider thing

So, I dunno what the correct term for it, but basically I’m trying to figure out how I can create something like what Clip Studio (or Manga studio) uses to blend between models, but instead of having sliders for every morph target, I’m trying to see if I can make something more like what they use in Clip Studio, but I’m kinda clueless when it comes to programming…

Image of what the slider-thing looks like: alt text

Try using two sliders, one horizontal and one vertical.

Kinda like a coordinate system. Make the slider move according to each other, and use negative values too40507-coords.png

This is what i mean, it doesn’t have to look like it, but if you can make it function like it you could use negative values to determine your Sensual and Slim variables.