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Diffstat (limited to 'common/coords.lua')
| -rw-r--r-- | common/coords.lua | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/common/coords.lua b/common/coords.lua index 1bb9154..2399e43 100644 --- a/common/coords.lua +++ b/common/coords.lua @@ -76,6 +76,8 @@ function Pos.__div(a,b) end function Pos.lensq(self) return self.x^2 + self.y^2 end function Pos.len(self) return math.sqrt(self:lensq()) end +function Pos.norm(self) return self/self:len() end +function Pos.dot(self,other) return self.x*other.x + self.y*other.y end function Pos.to_hex(self) local q = self.x*(SR3/3) - self.y*(1/3) local r = (2/3)*self.y |