# 00000000   0000000    0000000  00000000
# 000       000   000  000       000     
# 000000    000000000  000       0000000 
# 000       000   000  000       000     
# 000       000   000   0000000  00000000

Quaternion = require './lib/quaternion'
Vector     = require './lib/vector'

class Face

    @X  = 0
    @Y  = 1
    @Z  = 2
    @NX = 3
    @NY = 4
    @NZ = 5
    
    @orientation: (face) ->
        switch face % 6
           when 0 then return Quaternion.rot_90_Y
           when 1 then return Quaternion.rot_270_X
           when 2 then return Quaternion.rot_0
           when 3 then return Quaternion.rot_270_Y
           when 4 then return Quaternion.rot_90_X
           when 5 then return Quaternion.rot_180_X

    @normal: (face) ->
        o = (face < 3) and 1 or -1
        switch face % 3 
            when 0 then return new Vector o, 0, 0
            when 1 then return new Vector 0, o, 0
            when 2 then return new Vector 0, 0, o
        new Vector

    @orientationForFace: (face) -> @orientation face
    @normalVectorForFace: (face) -> @normal face
        
module.exports = Face