# Analogue Stick Directions

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• Hi peeps - is there an easy way to get the direction from an analogue stick? At present the only values you can obtain are the horizontal and vertical position and unfortunately my maths is a bit sketchy these days

I'm just testing things at the moment and am trying to get a turret to always look in the direction of the right stick.

• I don't claim to know how to best go about this, and I don't have the XNA exporter yet, but...

Cos and Sin would probably be the way to go math wise, but you can do the same with Advanced Direction Object, and have the angle of the turret set to Direction Between Two Points, giving the first point X=0,Y=0 and the second point the horizontal and vertical positions you got from the gamepad.

The above is assuming the analog stick has 0,0 for center point, but if not, then you need to figure out what the X and Y of the center are and use those for the first point. When using the Joypad object, the center point seemed to be max_value/2 for both axises, as the top-left corner of an analog stick of an X360 gamepad (on a PC anyways) gives roughly a position of 0,0 and the bottom right is something around 65500,65500 or something. Joypad was able to fetch the max values, I think.

Don't quote me on any of that though. It's just how I think it was. ;P

Edited once, last by HitmanN (June 6, 2012 at 11:59 AM).

• Thanks V - the Xbox sticks returns 0,0 for dead centre and -/+100 for maximum directional push.

I've got to be honest, I was expecting there to be an expression for directional value!

Edit - just noticed the Direction Calculator object has a convert XY into direction - this can be combined with the X & Y positions of the sticks to successfully work. Thanks for the tip in the right direction.

Edited once, last by Asholay (June 6, 2012 at 2:29 PM).

• Glad you got it figured out. It's really just basic maths when you look at it. I didn't have any trouble setting it up when I was testing it. The dir calc works too of course.

Need art for your game? I'm currently available for work.

• What method do you use? I'd far sooner use the correct maths than an extension as it'll be better on mem and space.

• I used this method with a recent shooter game I am working on:

Quote

ATan2((StickRightV*-1.0), StickRightH)

Converts the axis values to an angle.

• That's exactly the sort of thing I was looking for thanks, but I can't quite get it to work for me - it just spins around with any input given. I'm avoiding the trig, but something tells me I need to get some books out again

• It's not tough, just remember your SOH CAH TOA, get working out some angles on some Triangles...

This guy's videos help a lot:

• Actually, done some more testing with counters watching everything and ColeJs method does work perfectly - but for some reason, the horizontal and vertical values returned by the gamepads is a bit touch and go?

Pressing forward goes from 0 to -100 perfectly, but pulling down works it's way towards +100, then when it hits +100, it provides a -100 reading instead??

Does that happen for you guys as well?

Edit: only seems to do it when testing through Windows, works ok on xbox... bah, there's so many slight differences between running on win & box!