Timers and how to tell if an object stops moving?

Games
#1

Hello,
I’m new at Corona and got excellent help in my last topic. After trying to figure this out for myself for a while I wanted to ask.

How could I tell if an object stops moving? I looked into getlinearvelocity, and also event:speed, and I couldn’t get any to work. I wanted to stop something if an object hasn’t moved for a few seconds.

This leads me to the next thing. I’ve made an improvised timer, but it worked pretty sloppily.
Then there is timer.performWithDelay( delay, listener [, iterations] )

Does that make sense in this context? Could I call this, if an object stops moving for X seconds? I’d like it to also abort the “stopping”, once it starts moving. I think I could just use (cheap code) “if speed < number then initiate stopping” and it would stop if the speed would rise over “number”, no?

When I tried around with performWithDelay it seemed to be “unstoppable” though once initiated.

Which would be the most resourceful and practical solution to this?

Any help is appreciated, thanks! [import]uid: 65258 topic_id: 10884 reply_id: 310884[/import]

#2

Assuming you are not checking for movements of lot of objects you can do following,
[lua]–assuming your defined object is called object1

local x0, y0

local function gameLoop(e)
if not(x0 == nil or y0 == nil) then
deltaX = object1.x - x0
deltaY = object1.y - y0
end
x0 = object1.x
y0 = object1.y

if deltaX == 0 and deltaY == 0 then
–The object has stopped moving.
–Call other function that needs to be called when object stops moving here.

end

end

Runtime:addEventListener(“enterFrame”,gameLoop)[/lua] [import]uid: 48521 topic_id: 10884 reply_id: 39558[/import]

#3

Thanks, that works pretty well. Its the only object I check for movement right now.

Now I only need to learn about the timers, as asked in the first post. Could somebody give me a heads up with that too?

Thank you again for the great advice. [import]uid: 65258 topic_id: 10884 reply_id: 39609[/import]