I’m quite new to programming and lua so i’m not sure I can explain this well. I’m creating a feature in my 2D platformer game where the character can be teleported sort of back in time. For example, teleporting it where it was 3 seconds ago. I assume there’s no handy function to just get coordinates 3 seconds ago, but I’ve only come up with saving coordinates every 0.1s in a table in enterFrame function and then deleting them after 3 seconds have passed. Anyways, this method would probably considerably slow down mobile devices and would be a hassle to code. Any suggestions are highly appreciated!
Hello,
I made the same program a week ago, and I use the same method as you : to save the data in a table each frame, and then delete it after a time.
I think it’s the more easy way to do.
Hey yvandotet,
Could you possibly share your code of how you manage the table? Sadly, I have no experience with timers and tables :(.
Big thanks for you help 
I don’t have the code yet, but it’s easy to do.
I made one quickly, where a ball drop on the top left with a tiny speed, and touch the ground.
To comeback to the past, tap the screen.
I fill the table " tab " with coordonnate each 300 milliseconds, and when I tap the screen, a series of transition happens to go to the last place where the user tap.
It’s just an idea.
//the object local ball=display.newCircle(0,0,30) physics.addBody(ball,{radius=30}) ball:setLinearVelocity(100,0) //the ground local ground=display.newRect(display.contentCenterX,display.contentCenterY,300,10) physics.addBody(ground,"static") //to fill the ball.x and ball.y local tab={} function ball.pastCoordonate() local o=ball table.insert(tab,{o.x,o.y}) end local timeChecking=300 local checkTimer=timer.performWithDelay(timeChecking,ball.pastCoordonate,-1) local isTap local function retour(event) if not isTap then isTap=true timer.pause(checkTimer) local cumul=0 for k=#tab,2,-1 do transition.to(ball,{time=100,delay=cumul,x=tab[k][1],y=tab[k][2]}) cumul=cumul+100 table.remove(tab,k) end if #tab==0 then return end transition.to(ball,{time=100,delay=cumul,x=tab[1][1],y=tab[1][2], onComplete=function() timer.resume(checkTimer) isTap=false ball:setLinearVelocity(100,0) end}) table.remove(tab,1) end end Runtime:addEventListener("tap",retour)Hello,
I made the same program a week ago, and I use the same method as you : to save the data in a table each frame, and then delete it after a time.
I think it’s the more easy way to do.
Hey yvandotet,
Could you possibly share your code of how you manage the table? Sadly, I have no experience with timers and tables :(.
Big thanks for you help
I don’t have the code yet, but it’s easy to do.
I made one quickly, where a ball drop on the top left with a tiny speed, and touch the ground.
To comeback to the past, tap the screen.
I fill the table " tab " with coordonnate each 300 milliseconds, and when I tap the screen, a series of transition happens to go to the last place where the user tap.
It’s just an idea.
//the object local ball=display.newCircle(0,0,30) physics.addBody(ball,{radius=30}) ball:setLinearVelocity(100,0) //the ground local ground=display.newRect(display.contentCenterX,display.contentCenterY,300,10) physics.addBody(ground,"static") //to fill the ball.x and ball.y local tab={} function ball.pastCoordonate() local o=ball table.insert(tab,{o.x,o.y}) end local timeChecking=300 local checkTimer=timer.performWithDelay(timeChecking,ball.pastCoordonate,-1) local isTap local function retour(event) if not isTap then isTap=true timer.pause(checkTimer) local cumul=0 for k=#tab,2,-1 do transition.to(ball,{time=100,delay=cumul,x=tab[k][1],y=tab[k][2]}) cumul=cumul+100 table.remove(tab,k) end if #tab==0 then return end transition.to(ball,{time=100,delay=cumul,x=tab[1][1],y=tab[1][2], onComplete=function() timer.resume(checkTimer) isTap=false ball:setLinearVelocity(100,0) end}) table.remove(tab,1) end end Runtime:addEventListener("tap",retour)