tangent/lume
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Merge pull request #3 from icrawler/Dev2

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Stripped all trailing whitespace, changed ease function, and pre-computed po2
This commit is contained in:
rxi 2014-05-07 08:18:22 +01:00
commit 95c3f8960d
2 changed files with 14 additions and 13 deletions
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2
README.md
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@ -38,7 +38,7 @@ lume.lerp(100, 200, .5) -- Returns 150
``` ```
### lume.smooth(a, b, amount) ### lume.smooth(a, b, amount)
Similar to `lume.lerp()` but uses cosine interpolation instead of linear Similar to `lume.lerp()` but uses cubic interpolation instead of linear
interpolation. interpolation.
### lume.pingpong(x) ### lume.pingpong(x)

25
lume.lua
View File

@ -59,7 +59,8 @@ end
function lume.smooth(a, b, amount) function lume.smooth(a, b, amount)
local m = (1 - math_cos(lume.clamp(amount, 0, 1) * math_pi)) / 2 local t = lume.clamp(amount, 0, 1)
local m = t*t*(3-2*t)
return a + (b - a) * m return a + (b - a) * m
end end
@ -136,7 +137,7 @@ end
function lume.map(t, fn) function lume.map(t, fn)
local rtn = {} local rtn = {}
for k, v in pairs(t) do rtn[k] = fn(v) end for k, v in pairs(t) do rtn[k] = fn(v) end
return rtn return rtn
end end
@ -170,7 +171,7 @@ end
function lume.set(t, retainkeys) function lume.set(t, retainkeys)
local rtn = {} local rtn = {}
for k, v in pairs(lume.invert(t)) do for k, v in pairs(lume.invert(t)) do
rtn[retainkeys and v or (#rtn + 1)] = k rtn[retainkeys and v or (#rtn + 1)] = k
end end
return rtn return rtn
@ -253,7 +254,7 @@ function lume.fn(fn, ...)
local args = {...} local args = {...}
return function(...) return function(...)
local a = lume.merge(lume.clone(args), {...}) local a = lume.merge(lume.clone(args), {...})
return fn(unpack(a)) return fn(unpack(a))
end end
end end
@ -363,8 +364,8 @@ end
function lume.format(str, vars) function lume.format(str, vars)
if not vars then return str end if not vars then return str end
local f = function(x) local f = function(x)
return tostring(vars[x] or vars[tonumber(x)] or "{" .. x .. "}") return tostring(vars[x] or vars[tonumber(x)] or "{" .. x .. "}")
end end
return (str:gsub("{(.-)}", f)) return (str:gsub("{(.-)}", f))
end end
@ -401,7 +402,7 @@ function lume.hotswap(modname)
local oldglobal = lume.clone(_G) local oldglobal = lume.clone(_G)
local updated = {} local updated = {}
local function update(old, new) local function update(old, new)
if updated[old] then return end if updated[old] then return end
updated[old] = true updated[old] = true
local oldmt, newmt = getmetatable(old), getmetatable(new) local oldmt, newmt = getmetatable(old), getmetatable(new)
if oldmt and newmt then update(oldmt, newmt) end if oldmt and newmt then update(oldmt, newmt) end
@ -421,7 +422,7 @@ function lume.hotswap(modname)
local newmod = require(modname) local newmod = require(modname)
if type(oldmod) == "table" then update(oldmod, newmod) end if type(oldmod) == "table" then update(oldmod, newmod) end
for k, v in pairs(oldglobal) do for k, v in pairs(oldglobal) do
if v ~= _G[k] and type(v) == "table" then if v ~= _G[k] and type(v) == "table" then
update(v, _G[k]) update(v, _G[k])
_G[k] = v _G[k] = v
end end
@ -434,9 +435,9 @@ end
function lume.rgba(color) function lume.rgba(color)
local a = math_floor((color / 2 ^ 24) % 256) local a = math_floor((color / 16777216) % 256)
local r = math_floor((color / 2 ^ 16) % 256) local r = math_floor((color / 65536) % 256)
local g = math_floor((color / 2 ^ 08) % 256) local g = math_floor((color / 256) % 256)
local b = math_floor((color) % 256) local b = math_floor((color) % 256)
return r, g, b, a return r, g, b, a
end end
@ -457,4 +458,4 @@ function lume.chain(value)
end end
return lume return lume