(show (i c)) ++ "," ++ (show (j c)) ++ "," ++ (show (k c))
+-- | Returns an empty 'Cube'.
empty_cube :: Cube
empty_cube = Cube 0 0 0 0 empty_values
instance ThreeDimensional Cube where
-- | The center of Cube_ijk coincides with v_ijk at
- -- (ih, jh, kh). See Sorokina and Zeilfelder, p. 76.
+ -- (ih, jh, kh). See Sorokina and Zeilfelder, p. 76.
center c = (x, y, z)
where
delta = h c
y = delta * j'
z = delta * k'
+ -- | It's easy to tell if a point is within a cube; just make sure
+ -- that it falls on the proper side of each of the cube's faces.
contains_point c p
| (x_coord p) < (xmin c) = False
| (x_coord p) > (xmax c) = False
v1' = center (front_face c)
v2' = Face.v1 (front_face c)
v3' = Face.v2 (front_face c)
- fv' = rotate (Cube.fv c) ccwx
+ fv' = rotate (Cube.fv c) cwx
tetrahedron2 :: Cube -> Tetrahedron
tetrahedron2 c =
v1' = center (front_face c)
v2' = Face.v2 (front_face c)
v3' = Face.v3 (front_face c)
- fv' = rotate (Cube.fv c) (ccwx . ccwx)
+ fv' = rotate (Cube.fv c) (cwx . cwx)
tetrahedron3 :: Cube -> Tetrahedron
tetrahedron3 c =
v1' = center (front_face c)
v2' = Face.v3 (front_face c)
v3' = Face.v0 (front_face c)
- fv' = rotate (Cube.fv c) cwx
+ fv' = rotate (Cube.fv c) ccwx
tetrahedron4 :: Cube -> Tetrahedron
tetrahedron4 c =
v1' = center (top_face c)
v2' = Face.v0 (top_face c)
v3' = Face.v1 (top_face c)
- fv' = rotate (Cube.fv c) cwy
+ fv' = rotate (Cube.fv c) ccwy
tetrahedron5 :: Cube -> Tetrahedron
tetrahedron5 c =
v1' = center (top_face c)
v2' = Face.v1 (top_face c)
v3' = Face.v2 (top_face c)
- fv' = rotate (Tetrahedron.fv (tetrahedron4 c)) ccwz
+ fv' = rotate (Tetrahedron.fv (tetrahedron4 c)) cwz
tetrahedron6 :: Cube -> Tetrahedron
tetrahedron6 c =
v1' = center (top_face c)
v2' = Face.v2 (top_face c)
v3' = Face.v3 (top_face c)
- fv' = rotate (Tetrahedron.fv (tetrahedron4 c)) (ccwz . ccwz)
+ fv' = rotate (Tetrahedron.fv (tetrahedron4 c)) (cwz . cwz)
tetrahedron7 :: Cube -> Tetrahedron
tetrahedron7 c =
v1' = center (top_face c)
v2' = Face.v3 (top_face c)
v3' = Face.v0 (top_face c)
- fv' = rotate (Tetrahedron.fv (tetrahedron4 c)) cwz
+ fv' = rotate (Tetrahedron.fv (tetrahedron4 c)) ccwz
tetrahedron8 :: Cube -> Tetrahedron
tetrahedron8 c =
v1' = center (back_face c)
v2' = Face.v0 (back_face c)
v3' = Face.v1 (back_face c)
- fv' = rotate (Tetrahedron.fv (tetrahedron4 c)) cwy
+ fv' = rotate (Tetrahedron.fv (tetrahedron4 c)) ccwy
tetrahedron9 :: Cube -> Tetrahedron
tetrahedron9 c =
v1' = center (back_face c)
v2' = Face.v1 (back_face c)
v3' = Face.v2 (back_face c)
- fv' = rotate (Tetrahedron.fv (tetrahedron8 c)) ccwx
+ fv' = rotate (Tetrahedron.fv (tetrahedron8 c)) cwx
tetrahedron10 :: Cube -> Tetrahedron
tetrahedron10 c =
v1' = center (back_face c)
v2' = Face.v2 (back_face c)
v3' = Face.v3 (back_face c)
- fv' = rotate (Tetrahedron.fv (tetrahedron8 c)) (ccwx . ccwx)
+ fv' = rotate (Tetrahedron.fv (tetrahedron8 c)) (cwx . cwx)
tetrahedron11 :: Cube -> Tetrahedron
v1' = center (back_face c)
v2' = Face.v3 (back_face c)
v3' = Face.v0 (back_face c)
- fv' = rotate (Tetrahedron.fv (tetrahedron8 c)) cwx
+ fv' = rotate (Tetrahedron.fv (tetrahedron8 c)) ccwx
tetrahedron12 :: Cube -> Tetrahedron
v1' = center (down_face c)
v2' = Face.v0 (down_face c)
v3' = Face.v1 (down_face c)
- fv' = rotate (Tetrahedron.fv (tetrahedron8 c)) cwy
+ fv' = rotate (Tetrahedron.fv (tetrahedron8 c)) ccwy
tetrahedron13 :: Cube -> Tetrahedron
v1' = center (down_face c)
v2' = Face.v1 (down_face c)
v3' = Face.v2 (down_face c)
- fv' = rotate (Tetrahedron.fv (tetrahedron12 c)) ccwz
+ fv' = rotate (Tetrahedron.fv (tetrahedron12 c)) cwz
tetrahedron14 :: Cube -> Tetrahedron
v1' = center (down_face c)
v2' = Face.v2 (down_face c)
v3' = Face.v3 (down_face c)
- fv' = rotate (Tetrahedron.fv (tetrahedron13 c)) (ccwz . ccwz)
+ fv' = rotate (Tetrahedron.fv (tetrahedron13 c)) (cwz . cwz)
tetrahedron15 :: Cube -> Tetrahedron
v1' = center (down_face c)
v2' = Face.v3 (down_face c)
v3' = Face.v0 (down_face c)
- fv' = rotate (Tetrahedron.fv (tetrahedron12 c)) cwz
+ fv' = rotate (Tetrahedron.fv (tetrahedron12 c)) ccwz
tetrahedron16 :: Cube -> Tetrahedron
v1' = center (right_face c)
v2' = Face.v0 (right_face c)
v3' = Face.v1 (right_face c)
- fv' = rotate (Tetrahedron.fv (tetrahedron0 c)) ccwz
+ fv' = rotate (Tetrahedron.fv (tetrahedron0 c)) cwz
tetrahedron17 :: Cube -> Tetrahedron
v1' = center (left_face c)
v2' = Face.v0 (left_face c)
v3' = Face.v1 (left_face c)
- fv' = rotate (Tetrahedron.fv (tetrahedron0 c)) cwz
+ fv' = rotate (Tetrahedron.fv (tetrahedron0 c)) ccwz
tetrahedron21 :: Cube -> Tetrahedron
v1' = center (left_face c)
v2' = Face.v1 (left_face c)
v3' = Face.v2 (left_face c)
- fv' = rotate (Tetrahedron.fv (tetrahedron20 c)) ccwy
+ fv' = rotate (Tetrahedron.fv (tetrahedron20 c)) cwy
tetrahedron22 :: Cube -> Tetrahedron
v1' = center (left_face c)
v2' = Face.v2 (left_face c)
v3' = Face.v3 (left_face c)
- fv' = rotate (Tetrahedron.fv (tetrahedron20 c)) ccwy
+ fv' = rotate (Tetrahedron.fv (tetrahedron20 c)) (cwy . cwy)
tetrahedron23 :: Cube -> Tetrahedron