tangent/lume
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Added lume.vector(), updated README and tests

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This commit is contained in:
rxi 2016-09-19 21:55:59 +01:00
parent 59f90934aa
commit b569915d3e
3 changed files with 35 additions and 13 deletions
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6
README.md
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@ -52,6 +52,12 @@ used when comparing distances.
### lume.angle(x1, y1, x2, y2)
Returns the angle between the two points.
### lume.vector(angle, magnitude)
Given an `angle` and `magnitude`, returns a vector.
```lua
local x, y = lume.vector(0, 10) -- Returns 10, 0
```
### lume.random([a [, b]])
Returns a random number between `a` and `b`. If only `a` is supplied a number
between `0` and `a` is returned. If no arguments are supplied a random number

5
lume.lua
View File

@ -111,6 +111,11 @@ function lume.angle(x1, y1, x2, y2)
end
function lume.vector(angle, magnitude)
return math.cos(angle) * magnitude, math.sin(angle) * magnitude
end
function lume.random(a, b)
if not a then a, b = 0, 1 end
if not b then b = 0 end

37
test/test.lua
View File

@ -20,7 +20,7 @@ end
-- lume.round
tests["lume.round"] = function()
testeq( lume.round(.5), 1 )
testeq( lume.round(.5), 1 )
testeq( lume.round(-.5), -1 )
testeq( lume.round(2.4), 2 )
testeq( lume.round(123, 10), 120 )
@ -80,6 +80,18 @@ tests["lume.angle"] = function()
testeq( lume.angle(10, 10, 10, 30), math.rad(90) )
end
-- lume.vector
tests["lume.vector"] = function()
local function cmp(a, b) return math.abs(a - b) < 10e-6 end
local x, y
x, y = lume.vector(0, 10)
testeq( cmp(x, 10) and cmp(y, 0), true )
x, y = lume.vector(math.pi, 100)
testeq( cmp(x, -100) and cmp(y, 0), true )
x, y = lume.vector(math.pi * 0.25, 100)
testeq( cmp(x, 70.71067811865476) and cmp(y, 70.71067811865476), true )
end
-- lume.random
tests["lume.random"] = function()
testeq( type(lume.random()), "number" )
@ -258,9 +270,9 @@ end
-- lume.filter
tests["lume.filter"] = function()
local t = lume.filter({1, 2, 3, 4, 5}, function(x) return x % 2 == 0 end )
local t = lume.filter({1, 2, 3, 4, 5}, function(x) return x % 2 == 0 end )
testeq( t, {2, 4} )
local t = lume.filter({a=1, b=2, c=3}, function(x) return x == 2 end, true)
local t = lume.filter({a=1, b=2, c=3}, function(x) return x == 2 end, true)
testeq( t, {b=2} )
local t = lume.filter({{ x=1, y=1 }, { x=2, y=2 }, { x=1, y=3 }}, { x = 1 })
testeq( t, {{ x=1, y=1 }, {x=1, y=3}} )
@ -268,9 +280,9 @@ end
-- lume.reject
tests["lume.reject"] = function()
local t = lume.reject({1, 2, 3, 4, 5}, function(x) return x % 2 == 0 end )
local t = lume.reject({1, 2, 3, 4, 5}, function(x) return x % 2 == 0 end )
testeq( t, {1, 3, 5} )
local t = lume.reject({a=1, b=2, c=3}, function(x) return x == 2 end, true)
local t = lume.reject({a=1, b=2, c=3}, function(x) return x == 2 end, true)
testeq( t, {a=1, c=3} )
local t = lume.reject({{ x=1, y=1 }, { x=2, y=2 }, { x=1, y=3 }}, { x = 1 })
testeq( t, {{ x=2, y=2 }} )
@ -354,7 +366,7 @@ tests["lume.first"] = function()
local t = { "a", "b", "c", "d", "e" }
testeq( lume.first(t), "a" )
testeq( lume.first(t, 1), { "a" } )
testeq( lume.first(t, 2), { "a", "b" } )
testeq( lume.first(t, 2), { "a", "b" } )
end
-- lume.last
@ -362,7 +374,7 @@ tests["lume.last"] = function()
local t = { "a", "b", "c", "d", "e" }
testeq( lume.last(t), "e" )
testeq( lume.last(t, 1), { "e" } )
testeq( lume.last(t, 2), { "d", "e" } )
testeq( lume.last(t, 2), { "d", "e" } )
end
-- lume.invert
@ -385,9 +397,9 @@ end
-- lume.keys
tests["lume.keys"] = function()
testeq( lume.keys({}), {} )
local t = lume.keys({ aaa = 1, bbb = 2, ccc = 3 })
local t = lume.keys({ aaa = 1, bbb = 2, ccc = 3 })
table.sort(t)
testeq( t, {"aaa", "bbb", "ccc"} )
testeq( t, {"aaa", "bbb", "ccc"} )
local t = lume.keys({ "x", "x", "x" })
testeq( t, {1, 2, 3} )
end
@ -544,14 +556,14 @@ tests["lume.trace"] = function()
lume.trace("Hi world", 123.456, 1, nil)
print = oldprint
testeq( file:match(".lua$"), ".lua" )
testeq( tonumber(line) ~= nil, true )
testeq( tonumber(line) ~= nil, true )
testeq( msg, "Hi world 123.46 1 nil" )
end
-- lume.dostring
tests["lume.dostring"] = function()
testeq( lume.dostring([[return "hello!"]]), "hello!" )
testeq( lume.dostring([[return 12345]]), 12345 )
testeq( lume.dostring([[return 12345]]), 12345 )
end
-- lume.uuid
@ -606,7 +618,7 @@ end
-- lume.chain
tests["lume.chain"] = function()
local t = lume.chain({1, 2}):map(function(x) return x * 2 end):result()
local t = lume.chain({1, 2}):map(function(x) return x * 2 end):result()
testeq( t, { 2, 4 } )
testeq( lume.chain(10):result(), 10 )
local t = lume({1, 2}):map(function(x) return x * 2 end):result()
@ -617,4 +629,3 @@ end
tester.dotests(tests)
tester.test.global()
tester.printresults()