--[[
        Class: Vector
        API :
        ---- functions ----
        VectorType(v)                           -- return if as vector
        VectorIntersection(a1,b1,a2,b2)         -- return the Intersection of 2 lines
        IsLineSegmentIntersection(A,B,C,D)      -- return if 2 linesegments intersect
        LineSegmentIntersection(A,B,C,D)        -- return the Intersection of 2 linesegments
        VectorDirection(v1,v2,v)
        VectorPointProjectionOnLine(v1, v2, v)  -- return a vector on line v1-v2 closest to v
        Vector(a,b,c)                           -- return a vector from x,y,z pos or from another vector
        ---- Vector Members ----
        x
        y
        z
        ---- Vector Functions ----
        vector:clone()                          -- return a new Vector from vector
        vector:unpack()                         -- x, z
        vector:len2()                           -- return vector^2
        vector:len2(v)                          -- return vector^v
        vector:len()                            -- return vector length
        vector:dist(v)                          -- distance between 2 vectors (v and vector)
        vector:normalize()                      -- normalize vector
        vector:normalized()                     -- return a new Vector normalize from vector
        vector:rotate(phiX, phiY, phiZ)         -- rotate the vector by phi angle
        vector:rotated(phiX, phiY, phiZ)        -- return a new Vector rotate from vector by phi angle
        vector:projectOn(v)                     -- return a new Vector from vector projected on v
        vector:mirrorOn(v)                      -- return a new Vector from vector mirrored on v
        vector:center(v)                        -- return center between vector and v
        vector:crossP()                         -- return cross product of vector
        vector:dotP()                           -- return dot product of vector
        vector:polar()                          -- return the angle from axe
        vector:angleBetween(v1, v2)             -- return the angle formed from vector to v1,v2
        vector:compare(v)                       -- compare vector and v
        vector:perpendicular()                  -- return new Vector rotated 90?right
        vector:perpendicular2()                 -- return new Vector rotated 90?left
]]