Skip to content

Optimized easing.lua #2

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
Apollo144 wants to merge 2 commits into
base: master
Choose a base branch
from
Open

Optimized easing.lua #2

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
cb290be
Update easing.lua
Apollo144 Dec 9, 2018
1b13937
Update easing.lua
Apollo144 Dec 9, 2018
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
59 changes: 30 additions & 29 deletions easing.lua
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -4,23 +4,24 @@ https://github.com/joshtynjala/gtween.lua
Licensed under the MIT license.

Easing functions adapted from Robert Penner's AS3 tweening equations.
]]

*09.12.2018 Modified by @Apollo14: replaced vanilla math functions with faster Gideros ^ operators ]]

local backS = 1.70158
easing = {};
easing.inBack = function(ratio)
return ratio*ratio*((backS+1)*ratio-backS)
end
easing.outBack = function(ratio)
ratio = ratio - 1
ratio-=1
return ratio*ratio*((backS+1)*ratio+backS)+1
end
easing.inOutBack = function(ratio)
ratio = ratio * 2
ratio*=2
if ratio < 1 then
return 0.5*(ratio*ratio*((backS*1.525+1)*ratio-backS*1.525))
else
ratio = ratio - 2
ratio-=2
return 0.5*(ratio*ratio*((backS*1.525+1)*ratio+backS*1.525)+2)
end
end
Expand All @@ -31,51 +32,51 @@ easing.outBounce = function(ratio)
if ratio < 1/2.75 then
return 7.5625*ratio*ratio
elseif ratio < 2/2.75 then
ratio = ratio - 1.5/2.75
ratio-=1.5/2.75
return 7.5625*ratio*ratio+0.75
elseif ratio < 2.5/2.75 then
ratio= ratio - 2.25/2.75
ratio-=2.25/2.75
return 7.5625*ratio*ratio+0.9375
else
ratio = ratio - 2.625/2.75
ratio-=2.625/2.75
return 7.5625*ratio*ratio+0.984375
end
end
easing.inOutBounce = function(ratio)
ratio = ratio * 2
ratio*=2
if ratio < 1 then
return 0.5*easing.inBounce(ratio,0,0,0)
else
return 0.5*easing.outBounce(ratio-1,0,0,0)+0.5
end
end
easing.inCircular = function(ratio)
return -(math.sqrt(1-ratio*ratio)-1)
return -((1-ratio*ratio)^0.5-1)
end
easing.outCircular = function(ratio)
return math.sqrt(1-(ratio-1)*(ratio-1))
return (1-(ratio-1)*(ratio-1))^0.5
end
easing.inOutCircular = function(ratio)
ratio = ratio * 2
ratio*=2
if ratio < 1 then
return -0.5*(math.sqrt(1-ratio*ratio)-1)
return -0.5*((1-ratio*ratio)^0.5-1)
else
ratio = ratio - 2
return 0.5*(math.sqrt(1-ratio*ratio)+1)
ratio-=2
return 0.5*((1-ratio*ratio)^0.5+1)
end
end
easing.inCubic = function(ratio)
return ratio*ratio*ratio
end
easing.outCubic = function(ratio)
ratio = ratio - 1
ratio-=1
return ratio*ratio*ratio+1
end
easing.inOutCubic = function(ratio)
if ratio < 0.5 then
return 4*ratio*ratio*ratio
else
ratio = ratio - 1
ratio-=1
return 4*ratio*ratio*ratio+1
end
end
Expand All @@ -86,46 +87,46 @@ easing.inElastic = function(ratio)
if ratio == 0 or ratio == 1 then
return ratio
end
ratio = ratio - 1
return -(elasticA * math.pow(2, 10 * ratio) * math.sin((ratio - elasticS) * (2 * math.pi) / elasticP));
ratio-=1
return -(elasticA * 2^(10 * ratio) * math.sin((ratio - elasticS) * (2 * math.pi) / elasticP));
end
easing.outElastic = function(ratio)
if ratio == 0 or ratio == 1 then
return ratio
end
return elasticA * math.pow(2, -10 * ratio) * math.sin((ratio - elasticS) * (2 * math.pi) / elasticP) + 1;
return elasticA * 2^(-10 * ratio) * math.sin((ratio - elasticS) * (2 * math.pi) / elasticP) + 1;
end
easing.inOutElastic = function(ratio)
if ratio == 0 or ratio == 1 then
return ratio
end
ratio = ratio*2-1
if ratio < 0 then
return -0.5 * (elasticA * math.pow(2, 10 * ratio) * math.sin((ratio - elasticS*1.5) * (2 * math.pi) /(elasticP*1.5)));
return -0.5 * (elasticA * 2^(10 * ratio) * math.sin((ratio - elasticS*1.5) * (2 * math.pi) /(elasticP*1.5)));
end
return 0.5 * elasticA * math.pow(2, -10 * ratio) * math.sin((ratio - elasticS*1.5) * (2 * math.pi) / (elasticP*1.5)) + 1;
return 0.5 * elasticA * 2^(-10 * ratio) * math.sin((ratio - elasticS*1.5) * (2 * math.pi) / (elasticP*1.5)) + 1;
end
easing.inExponential = function(ratio)
if ratio == 0 then
return 0
end
return math.pow(2, 10 * (ratio - 1))
return 2^(10 * (ratio - 1))
end
easing.outExponential = function(ratio)
if ratio == 1 then
return 1
end
return 1-math.pow(2, -10 * ratio)
return 1-2^(-10 * ratio)
end
easing.inOutExponential = function(ratio)
if ratio == 0 or ratio == 1 then
return ratio
end
ratio = ratio*2-1
if 0 > ratio then
return 0.5*math.pow(2, 10*ratio)
return 0.5*2^(10 * ratio)
end
return 1-0.5*math.pow(2, -10*ratio)
return 1-0.5*2^(-10 * ratio)
end
easing.linear = function(ratio)
return ratio
Expand All @@ -146,28 +147,28 @@ easing.inQuartic = function(ratio)
return ratio*ratio*ratio*ratio
end
easing.outQuartic = function(ratio)
ratio = ratio - 1
ratio-=1
return 1-ratio*ratio*ratio*ratio
end
easing.inOutQuartic = function(ratio)
if ratio < 0.5 then
return 8*ratio*ratio*ratio*ratio
end
ratio = ratio - 1
ratio-=1
return -8*ratio*ratio*ratio*ratio+1
end
easing.inQuintic = function(ratio)
return ratio*ratio*ratio*ratio*ratio
end
easing.outQuintic = function(ratio)
ratio = ratio - 1
ratio-=1
return 1+ratio*ratio*ratio*ratio*ratio
end
easing.inOutQuintic = function(ratio)
if ratio < 0.5 then
return 16*ratio*ratio*ratio*ratio*ratio
end
ratio = ratio - 1
ratio-=1
return 16*ratio*ratio*ratio*ratio*ratio+1
end
easing.inSine = function(ratio)
Expand Down