Question

we are doing a game with moving objects around frame-by-frame and also using accelerometer.

We have hooked on two events – about drawing the frame and for the acc.

The problem is, after we receive the acc event, we immediately put the x value in a variable.

Then we use this variable to move an object on the screen, but there is CONSIDERABLE slow down. ( I turn the phone, and after a second the object is moving properly, but a second is just way too much for a game, I expect immediate response).

What am I doing wrong? Is there another workaround to do this, or can I give some params to the accelerometer?

Unfortunately this is a serious problem – a real blocker. If this does not work, I have to find another solution (not Corona) for implementing the game.

Thanks in advance!!!
Danail

PS: here’s some source:

local lastXGravity = 0

local function move(event) 
        eventTime=event.time
        elapsedTime = eventTime - lastDrawTime
        lastDrawTime = eventTime

        xSpeed = lastXGravity
        local xMoved = xSpeed * elapsedTime
        object.x= object.x + xMoved
end

function acc(event)   
        lastXGravity = event.xGravity
end

Runtime:addEventListener("accelerometer", acc)
Runtime:addEventListener( "enterFrame", move )

Answer 1

The guys at Ansca’s forum just got this out:

system.setAccelerometerInterval( 50 )

This didn’t quite actually did the trick, but

system.setAccelerometerInterval( 100 ) — warning – battery drainer!!

did it 🙂