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Originally Posted by AntonioLao Mathematically, 3D directional properties are the following:
1. Left-front-up
2. Left-front-down
3. Right-front-up
4. Right-front-down
5. Left-back-up
6. Left-back-down
7. Right-back-up
8. Right-back-down |
This reminds me a really lot of permutations. Particularly,
[(3!/3)x2]x2=8
and this is exactly how to get the number of directional properties. Of course, giving the lsit gives the visual proof, because nobody can say there are others, but the equation is the mathematical proof, which is always good to have.