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Sep
10
comment What are good colors for illustrating Up and Down?
I have another idea! What if we can design a string, which has drastically different friction depending on the direction? The cat fur is exactly that. If we had such strings, we could grab both strings, apply some down force. Naturally, we apply the force evenly on both strings, but because of the friction differences, it is applied unevenly - such that the high friction string moves with the hand and the low friction one moves against the hand direction.
Sep
9
comment What are good colors for illustrating Up and Down?
@DA01: Good point, there is a second competing concept here, which could confuse the user. Originally I was thinking about "a surface with different smoothness depending on the direction" and the arrows are just one possible shape. Like a cat's fur, there is certainly one right direction if you want to please it
Sep
9
comment What are good colors for illustrating Up and Down?
@SamuelEdwinWard: Yes, it was the down string. I've added the up string as well.
Sep
9
revised What are good colors for illustrating Up and Down?
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Sep
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Sep
8
revised What are good colors for illustrating Up and Down?
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Sep
8
answered What are good colors for illustrating Up and Down?
Apr
28
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