Accelerometer Controls Roll Ball in Exact Direction of Tilt

JoshKahane

Hi

I was wondering if it was possible to have it so that my ball in Trouball has tilt controls. But I don't just want tilt up and move up, left, right and down. Is it possible to have ti so that the ball moves in the very direction of the tilt? Any help much appreciated, thanks.

Kind regards,
Josh.

scitunes

check out the wiki and use accelerate rather than move. Use a max speed.

JoshKahane

Wiki has been checked. Sadly it doesn't really answer it, unless I my eyes are getting worse then they already are. Thanks though scitunes. Anyone have any ideas as to how this can be done?

ORBZ

you want it to move with a speed relative to the magnitude of the tilt.

something like this:

direction = angleToVector(accelerometerX, accelerometerY)
speed = 100*magnitude(accelerometerX, accelerometerY)

of course you'll want to play with the constant 100. Magnitude will be a normalized vector between 0 and 1. Of course, if you are viewing in landscape mode you'll need to transpose X and Y.

scitunes

The reason I thought using accelerate instead of move would work is that if you tilt diagonally you are changing both the X and Y and because you are using accelerate and not move the ball should move in a natural "labyrinth" style. What Orbz posted sounds good, though I've never tried it.

ORBZ

accelerate would probably be better than move, scitunes is correct it will give the feeling of mass you are looking for.

The rules would be the same for what I said before though, just use the Accelerate instead of the Move behavior but with the same direction and speed logic i stated above.

Of course, if you use accelerate you'll also want to add some Drag.

JoshKahane

This works great guys thanks!

UtopianGames

Is there any chance you could make a demo of this ORBZ? i'm playing around with tilt controls atm and would love to have a look.

Darren.