Attempt to call method 'applyForce'

m_zap · April 26, 2014, 1:50pm

Hi!

I want to create new obiect but output throw me

attempt to call method 'applyForce' (a nil value)

my function to create ‘ball’

function startBall() &nbsp;&nbsp;&nbsp; local ball = display.newRect(\_W + math.random( -400,400),\_H + math.random( -300,300) ,30, 40); &nbsp;&nbsp;&nbsp; physics.addBody(ball, "dynamic"); &nbsp;&nbsp;&nbsp; ball.myName = "ball"; &nbsp;&nbsp;&nbsp; ball:applyForce(math.random( -20,20), math.random( -20, 20), ball.x, ball.y ); end

And my onColision where i invoke my function

function onCollision( event ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if ( event.phase =="began" ) then &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; local pacman = event.object1; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; local ball = event.object2; if(ball.myName == "ball") then &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ball:removeSelf(); &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; startBall() &nbsp;&nbsp;&nbsp; end end end

When i invoke my method outside onCollision everythink work fine.

Thanks in advice!

g.robert9 · April 28, 2014, 7:36pm

First make sure that event.object2 is your ball and not pacman.

Does pacman has physics applied to it too?

If event.object2.myName == “ball” then it is ok, but if event.object2.myName is nil or some other value then object2 might be your pacman.

m_zap · April 28, 2014, 8:50pm

i have solution

if(ball.myName == "ball" and pacman.myName == "eate") then &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ball:removeSelf(); &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;local dr = timer.performWithDelay( 50, startBall ) &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;dr.ball = square &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;end &nbsp;

g.robert9 · April 28, 2014, 7:36pm

First make sure that event.object2 is your ball and not pacman.

Does pacman has physics applied to it too?

If event.object2.myName == “ball” then it is ok, but if event.object2.myName is nil or some other value then object2 might be your pacman.

m_zap · April 28, 2014, 8:50pm

i have solution

if(ball.myName == "ball" and pacman.myName == "eate") then &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ball:removeSelf(); &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;local dr = timer.performWithDelay( 50, startBall ) &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;dr.ball = square &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;end &nbsp;