Transition.to Sample Code Request

Games
1

Good day all,
For platform game, we can always see a movement platform
eg. from left to right, then to left again

I wonder how can we code out a left…right…left… movement using transition.to?
Thanks for the guiding [import]uid: 10373 topic_id: 4677 reply_id: 304677[/import]

2

What i plan to do, is there might be several moving platform display on the screen.

When a button clicked, all the moving object has to be stop by ‘transition.cancel’

which i stucked on this [import]uid: 10373 topic_id: 4677 reply_id: 14786[/import]

3

how about something like…

(note untested code)

[lua]-- keep a table of active transitions
local transitions = {}

– create objects
local platform1 = display.newImage(“platform.png”)
local platform2 = display.newImage(“platform.png”)

– forward reference to functions
local goLeft
local goRight

function goRight(obj)
transitions[obj] = transition.to(obj, {time=1000, obj.x+200, onComplete=goLeft})

end

function goLeft(obj)
transitions[obj] = transition.to(obj, {time=1000, obj.x-200, onComplete=goRight})

end

goRight(platform1)
goRight(platform2)[/lua]

then when you want to cancel all movement just iterate over the “transitions” table and do .cancel() on each item
[import]uid: 6645 topic_id: 4677 reply_id: 14812[/import]

4

note that you have to test their collision too, if not your character would just fall through, well maybe not fall through since you are not using physics :confused:

Also, search for beebeegames , it has pause capability [import]uid: 11334 topic_id: 4677 reply_id: 14856[/import]

5

@jmp909, hm… the code is not working.

Non of the platform is moving [import]uid: 10373 topic_id: 4677 reply_id: 14870[/import]

6

@jmp909,

i found corona strange behavior,
which mean u need to have the function visible before u call them.
For example your case,

function goRight(obj)  
 transitions[obj] = transition.to(obj, {time=1000, obj.x+200, onComplete=goLeft})  
   
end

can never call goLeft coz it’s at bottom.
What i resolve my moving leftright action, is i have the same function calling itself, using a global 12 variable swap to call different transition.to

Thanks for the idea! [import]uid: 10373 topic_id: 4677 reply_id: 14872[/import]

7

You can call goLeft from goRight (and vice versa) because I already defined the forward references above both of them [import]uid: 6645 topic_id: 4677 reply_id: 14894[/import]