Custom easing functions

Instead of moving from 0 to 1 at a constant rate (linear), an easing function remaps time so motion isn’t constant but changing.

Usually, easing styles have 4 directions:

• In: slow → fast

• Out: fast → slow

• In-Out: slow → fast → slow

• Out-In: fast → slow → fast

Easing is crucial in animations to make them feel natural, rather than robotic, and can usually be visualized with graphs, showing the motion from A to B. Check out examples here.

---

To add your own easing functions alongside the built-in ones, simply create a new module in your game, then tag it EasingFunctions.

Here’s the required format:

-- You can add any code here obviously :D

return {
	-- You can either write a single direction style:
	CoolEasing = function(alpha)
		return alpha
	end,
	
	-- Or you can write an all directions style:
	SuperCoolEasing = {
		In = function(alpha)
			return alpha
		end,
		Out = function(alpha)
			return alpha
		end,
		InOut = function(alpha)
			return alpha
		end,
		OutIn = function(alpha)
			return alpha
		end
	}
}

Tween+ will let you know if you do anything wrong!

You can always look in Tween->Utilities->EasingFunctions to see how the built-in ones are made. Just keep in mind they’re ultra-optimized.