library-mirrors/hump
1
0
Fork 0
mirror of https://github.com/vrld/hump.git synced 2024-10-15 09:04:18 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Fix wrong variable name in vector:mirrorOn() (thanks, Dani Ka!)

Browse Source
This commit is contained in:
Matthias Richter 2012-02-17 21:12:41 +01:00
parent 1bdeb7ef4a
commit 3957c73548
1 changed files with 7 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
vector.lua
View File

@ -140,22 +140,22 @@ function vector:perpendicular()
end
function vector:projectOn(v)
assert(isvector(v), "invalid argument: cannot project onto anything other than a vector")
assert(isvector(v), "invalid argument: cannot project vector on " .. type(v))
-- (self * v) * v / v:len2()
local s = (self.x * v.x + self.y * v.y) / (v.x * v.x + v.y * v.y)
return new(s * v.x, s * v.y)
end
function vector:mirrorOn(other)
assert(isvector(other), "invalid argument: cannot mirror on anything other than a vector")
-- 2 * self:projectOn(other) - self
function vector:mirrorOn(v)
assert(isvector(v), "invalid argument: cannot mirror vector on " .. type(v))
-- 2 * self:projectOn(v) - self
local s = 2 * (self.x * v.x + self.y * v.y) / (v.x * v.x + v.y * v.y)
return new(s * v.x - self.x, s * v.y - self.y)
end
function vector:cross(other)
assert(isvector(other), "cross: wrong argument types (<vector> expected)")
return self.x * other.y - self.y * other.x
function vector:cross(v)
assert(isvector(v), "cross: wrong argument types (<vector> expected)")
return self.x * v.y - self.y * v.x
end