Moving an object using the accelerometer with Corona SDK

Question

I am working on a small personal project to get comfortable with Corona SDK, I created a static floor and two static walls, then I create a ball and added dynamic physics to it. I made a function that moves the ball around when the accelerometer is active but I cant seem to get it right. I can make the object static and it moves around ok, but it wont interact with the dynamic walls or floor, I can make the object static but when the game loads the balls just shoots off screen and the app crashes.

Not sure how to approach this, I already looked at the sample project in corona.

Here is my code.

--Set accelerometer framerate
system.setAccelerometerInterval( 60 )
--Creates Hero
local function player(xCenter, yCenter, radius )
    local player1 = display.newImageRect( "images/hero.png", 32, 31 )
    player1.x = xCenter
    player1.y = yCenter
    player1:setFillColor( 100,100,100 )
    physics.addBody( player1, "dynamic", {bounce = 0, density=1, friction=.1, radius=radius} )
    return player1
end
local hero = player(startPlatform.x+20, startPlatform.y-15, 15)
local function heroMovex(event)
    hero.x = hero.x + (hero.x*event.xGravity)
    hero.y = hero.y + (hero.y * event.yGravity-1)
end
Runtime:addEventListener("accelerometer", heroMovex)

Answer 1

There are a number of ways to apply the accelerometer's gravity to your physics bodies. Rather than moving the body directly by adjusting its coordinates, try setting hero 's velocity to match the tilt:

local function heroMovex( event )
    hero:setLinearVelocity( 10 * event.xGravity, -10 * event.yGravity )
end

Or, if you don't mind applying the acceleration to everything, just bind gravity to the accelerometer:

local function tiltGravity( event )
    physics.setGravity( 10 * event.xGravity, -10 * event.yGravity )
end
Runtime:addEventListener("accelerometer", tiltGravity)