Animation Editor plugin does not use TweenService::GetValue - uses custom EasingStyles module instead

Bulletin Board
#1

Currently, the default Animation Editor plugin’s source code uses a custom EasingStyles module, whose source is

local module = {}

--Ignore semicolons. Converted from C++

module.GetEasing = function(style, direction, percent)
	if style == "Bounce" then
		if direction == "Out" then
			return 1 - easeOut(percent, bounce)
		elseif direction == "In" then
			return 1 - bounce(percent)
		else
			return 1 - easeInOut(percent, bounce)
		end
	elseif style == "Elastic" then
		if direction == "Out" then
			local totalTime = 1
			local p = totalTime * 0.3;
			local t = 1 - percent;
			local s = p / 4;
			return (1 + 2 ^ (-10 * t) * math.sin((t * totalTime - s) * (math.pi * 2)/  p));
		elseif direction == "In" then
			local totalTime = 1
			local p = totalTime * 0.3;
			local t = percent;
			local s = p / 4;
			return 1 - (1 + 2 ^ (-10 * t) * math.sin((t * totalTime - s) * (math.pi * 2) / p));
		elseif direction == "InOut" then
			local t = percent *2;
			local p = (.3*1.5);
			local s = p/4;
			if t < 1 then
				t = t - 1;
				return 1 - (-0.5 * 2 ^ (10 * t) * math.sin((t - s) * (math.pi * 2) / p));
			else
				t = t - 1;
				return 1 - (1 + 0.5 * 2 ^ (-10 * t) * math.sin((t - s) * (math.pi * 2) / p));
			end
		end
	elseif style == "Cubic" then
		if direction == "Out" then
			return 1 - easeOut(percent, cubic)
		elseif direction == "In" then
			return 1 - cubic(percent)
		elseif direction == "InOut" then
			return 1 - easeInOut(percent, cubic)
		end
	elseif style == "Linear" then
		return 1 - percent
	elseif style == "Constant" then
		if style == "Out" then
			return 1
		elseif style == "In" then
			return 0
		elseif style == "InOut" then
			return 0.5
		end
	end
end

function easeIn(t,func)
	return func(t)
end

function easeOut(t,func)
	return 1 - func(1 - t)
end

function easeInOut(t,func)
	t = t * 2
	if t < 1 then
		return easeIn(t, func) * 0.5
	else
		return 0.5 + easeOut(t - 1, func) * 0.5
	end
end

function bounce(t)
	if t < 0.36363636 then
		return 7.5625 * t * t
	elseif t < 0.72727272 then
		t = t - 0.54545454
		return 7.5625 * t * t + 0.75
	elseif t < 0.90909090 then
		t = t - 0.81818181
		return 7.5625 * t * t + 0.9375
	else
		t = t - 0.95454545
		return 7.5625 * t * t + 0.984375
	end
end

function cubic(t)
	return t ^ 3
end

return module

This module is a cause for a great number of bugs among this one. By using TweenService::GetValue instead of this module, a lot of very annoying bugs would get patched, along with having the animation behavior be consistent across studio & in-game. I have explained the exact reasons & issues it has on this post:

2 Likes
New Settings Available in the Animation Editor