I'm making a controller script for a paper airplane and I'm currently stuck on trying to make the plane gain speed when facing down but lose speed when facing up.
The ideal way would be having a `value` that's 0 when facing right or left but drops to -1 when facing up and 1 when facing down (It doesn't really matter which is 1 or -1 just that they're distinguishable).
Then I'd just multiply that `value` (which is somewhere in between -1 and 1) by `gain` and add that to my speed variable like this `speed += value * gain`.
Here's a picture to better understand.
I already got the information where the plane is currently facing (both in vector form and degrees) but how can I do this?
![alt text][1]
[1]: /storage/temp/75591-untitled-2.png
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