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3-bit Walsh permutation/ortho

From Wikiversity
The subpage .../comet shows the same information in a different layout.
19 different shapes
Contents
60 based on 12 squares
12 squares
24 simple parallelograms of type 1
24 simple parallelograms of type 2
48 based on 12 rectangles
12 rectangles
12 wide parallelograms (type 1)
12 long parallelograms (type 1)
12 hexagons (type 2)
144 based on 24 rectangles
24 rectangles
24 wide parallelograms (type 2)
48 long parallelograms (types 1 and 2)
48 hexagons (types 1 and 2)

There are 252 different orthographic projections. They form 63 groups of four, that look similar. They are all shown below.
Within such a group, each image has a reflection at the antidiagonal and an image with the same outline.

Some images also have horizontally or vertically mirrored equivalents. And a few have all eight rotations and reflections in the symmetry group of the square.
(These are all in the third section. The former in 24 rectangles and 48 long parallelograms, the latter in 48 hexagons.)


rect h
rect h
par long 1h
par long 2h
par long 2v
rect v
par long 1v
rect v
hex 2b
hex 1b
hex 1a
hex 2a
hex 2a
hex 1a
hex 1b
hex 2b


60 based on 12 squares

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12 squares
100


24 simple parallelograms of type 1
100


24 simple parallelograms of type 2
100


48 based on 12 rectangles

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110
110 110
.!.
110
!.. 101 ..!
011
.!.

12 rectangles
110


12 wide parallelograms (type 1)
110


12 long parallelograms (type 1)
110


12 hexagons (type 2)
!..


144 based on 24 rectangles

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101   bar !..   type 2   spam ..!   type 1   eggs
.!.   type 1   spam
110 >   type 2   foo 110   foo 110 <   type 1   foo
110   foo

24 rectangles
110
foo


24 wide parallelograms (type 2)
110 foo


48 long parallelograms (types 1 and 2)
110 <
type 1   foo


48 hexagons (types 1 and 2)
!..
type 1   spam