moving multiple objects (SOLVED)

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MaxV
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moving multiple objects (SOLVED)

Post by MaxV » Thu Feb 04, 2016 6:21 pm

I can't understand the move command.
If I write:

Code: Select all

repeat with i=1 to 16
  send "mex2" to image i in 0 sec
end repeat
and the following code in all images

Code: Select all

on mex2
  move me relative "0,60" in 2 sec
  wait 2 sec with messages
  move me relative "0,-60" in 2 sec
end mex2
The second part of the movement is unpredictable.
The images don't come back in the same sequence they start moving... :?:
Last edited by MaxV on Sat Feb 06, 2016 7:35 am, edited 1 time in total.
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dunbarx
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Re: moving multiple objects

Post by dunbarx » Thu Feb 04, 2016 10:49 pm

Hi.

I would do it like this, in a button script:

Code: Select all

on mouseUp
   repeat with i=1 to 16
      mex2 i
end repeat
end mouseUp

on mex2 index
  move img index relative "0,60" in 10
  wait 4 with messages
  move ing index  relative "0,-60" in 10
end mex2
I shortened the timing just so things would progress in a reasonable time frame.

But Max, why invoke a second handler when one will do? You can rewrite this in about one minute, I know.

Craig Newman

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Re: moving multiple objects

Post by bn » Fri Feb 05, 2016 1:01 am

Max,

I don't quite what exactly you are trying to do. But if it is the fact that your control with the mex2 script in pauses 2 seconds before going up again then you might want to have a look at "without waiting"

Code: Select all

on mex2
   move me relative "0,60" in 2 sec without waiting
   wait 2 sec with messages
   move me relative "0,-60" in 2 sec without waiting
end mex2
now the control moves down and then immediately up again. It does not wait 2 seconds when it is down as your script. In your script the whole thing takes 6 seconds and in "without waiting" it takes 4 seconds This is because move is blocking with "without waiting"

KInd regards
Bernd

MaxV
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Re: moving multiple objects

Post by MaxV » Fri Feb 05, 2016 11:56 am

I made this video: https://www.youtube.com/watch?v=6EXPHwutSwM

I can't understand the move command. If you look the video, when move has NOT the without waiting option, every image seems waiting the other images. Why this happen?
Every images receive its input, so every image should move independently from the others.
I'm very confused... :?
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Re: moving multiple objects

Post by dunbarx » Fri Feb 05, 2016 4:19 pm

I think the issues derive from the fact that the move command sort of lives its own life. Please try this experiment. On a new card, make a button and four fields. In the button script:

Code: Select all

on mouseUp
   put 10 into moveTime
   lock moves
   repeat with i=1 to 4
      move fld i relative "0,60" in moveTime without waiting
   end repeat
   unlock moves
   wait moveTime with messages
   lock moves
    repeat with i=1 to 4
       move fld i  relative "0,-60" in moveTime without waiting
       end repeat
end mouseUp
If anything new at all can be gleaned from the above nonsense, it is the introduction of the "lock/unlock moves" command.

Craig

MaxV
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Re: moving multiple objects

Post by MaxV » Fri Feb 05, 2016 6:20 pm

dunbarx wrote:I think the issues derive from the fact that the move command sort of lives its own life. Please try this experiment. On a new card, make a button and four fields.
...
If anything new at all can be gleaned from the above nonsense, it is the introduction of the "lock/unlock moves" command.

Craig
Craig,
I know the lock/unlock moves, but it has more sense to me. Because only with this option you can perfectly synchronize some interactions.
My problem is that I want unsynchronized movements, I want independent movements; but I get now it's my turn style movements
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Re: moving multiple objects

Post by [-hh] » Fri Feb 05, 2016 6:36 pm

[ EDIT. The first version of this post was wrong, sorry.]

Hi MaxV,

the problem is not the "move" but the "wait".
If you try for example

Code: Select all

local w=20

on mouseUp
  put line 13 to 20 of the script of me into s
  repeat with i=1 to 16
    put ("b"&i) into b
    if there is no btn b then create btn b
    set rect of btn b to (i*w,i*w,i*w+30,i*w+20)
    set script of btn b to s
    send "mex2 40" to btn b in i*100 millisecs
  end repeat
end mouseUp

on mex2 x
  if the shiftkey is down then exit mex2
  --  move me relative 0,x in 1 sec
  move me relative 0,x in 1 sec without waiting
  send "mex2 -x" to me in 1 sec
end mex2
then you can control exactly whats going by using "without waiting" or not, as Bernd proposes (and what the dictionary to "move" claims).

Hermann

p.s. Nice videos!
Last edited by [-hh] on Fri Feb 05, 2016 8:17 pm, edited 3 times in total.
shiftLock happens

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Re: moving multiple objects

Post by dunbarx » Fri Feb 05, 2016 6:42 pm

Hi.

If you remove all the "without waiting" in the example, the controls move in sequential order. is this closer to what you want? I suspect it is not exactly what you want, however.

Craig

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Re: moving multiple objects

Post by MaxV » Sat Feb 06, 2016 7:34 am

[-hh] wrote:][/i]

Hi MaxV,

the problem is not the "move" but the "wait".
....
Hermann

p.s. Nice videos!
Hi Herman,
your code works great!
So I learned for complex movement:
  • no more than a move in a handler
  • use without waiting option
  • calculate the time of movement
  • at the end of the hanlder use send in xx sec a new hanlder containing the new movement, xx is the time of the last movement.
Thank you so much!
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Re: moving multiple objects (SOLVED)

Post by dunbarx » Sat Feb 06, 2016 5:39 pm

Hermann.

That was terrific insight. This should be useful for many.

I would love to see a repository of clever solutions, not quite suitable for the "Sample Stacks" site, though one could make a stack that simply demonstrated techniques or solved problems, but rather an annotated library of handlers.

You might say that we already have this in the forum. But try to find this thread in a year. Keyword searches would do it, but how could a user even start to know what keywords are going to yield results?

Craig

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Re: moving multiple objects (SOLVED)

Post by [-hh] » Sat Feb 06, 2016 6:23 pm

Craig wrote:That was terrific insight.
One of my teachers was Craig N. (and Bernd N. for the animation part)
Craig wrote:I would love to see a repository of clever solutions, not quite suitable for the "Sample Stacks" site, though one could make a stack that simply demonstrated techniques or solved problems, but rather an annotated library of handlers.
MaxV will make a short summary (he started already with the listing above) of what he's doing on his site, not too complicated, isn't it Massimiliano? ;-)

And we will improve our knowledge of italian language by that ...
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Re: moving multiple objects (SOLVED)

Post by MaxV » Mon Feb 08, 2016 10:25 am

My personal site is in Italian, so I prefer to add things here in english:

http://livecode.wikia.com/wiki/HOW_TO

It's free and everybody can add his magic codes.
Livecode Wiki: http://livecode.wikia.com
My blog: https://livecode-blogger.blogspot.com
To post code use this: http://tinyurl.com/ogp6d5w

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