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  2 Axises 1 Degree?  (Read 873 times)
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Offline CyanPrime
« Posted 2010-04-30 22:42:37 »

I'm using Jinput and I'm trying to learn how to use my controllers joysticks. Now each one seems to give me two axises but I don't know how to turn the axis numbers uinto a degree.  Can anyone please help me?
Offline Nate

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« Reply #1 - Posted 2010-05-01 00:12:02 »

I believe Component#getPollData gives you a float between -1 and 1. Joysticks don't know about degrees, just percentage of maximum deflection.

FWIW, here is a class I use for an Xbox 360 controller:
http://code.google.com/p/pg3b/source/browse/trunk/Java/src/com/esotericsoftware/controller/input/JInputXboxController.java
Maybe you can make some use of it or borrow some code. Other classes in that project can access the Xbox controller through the XInput Windows API.

Offline CyanPrime
« Reply #2 - Posted 2010-05-01 02:46:01 »

Alright, Thanks ^_^ I think I got it: (Math.toDegrees(Math.atan2(-axisa2, axisa1)) + 180)
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Offline Markus_Persson

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« Reply #3 - Posted 2010-05-01 07:43:55 »

Math.toDegrees(Math.atan2(-axisa2, axisa1)) + 180

is the same as

Math.toDegrees(Math.atan2(axisa2, -axisa1))

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Offline JuddMan

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« Reply #4 - Posted 2010-05-01 10:07:15 »

Also

C2 = A2 + B2

Gives you how far the stick is tilted in its current direction.

dist = sqrt(axisx * axisx) + (axisy * axisy)

See, high school math is useful in the real world...
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