A transform callback would be cool

[ChesStrategy]

Been messing with transforms again, and I'm sort of stuck... see the code below

Code: Select all

renpy.show( 'something', at_list=[ place( 0, 0 ), slide( 200, 1.0 ), slide( -200, 1.0, start_offset=200 ) ] )

The goal was to place something at xpos, ypos of (0,0) and then slide something by an xoffset of 200 for 1 second, then see it slide back from xoffset 200 to an xoffset -200. However, only the last transform seems to be 'performed'.

Maybe I'm tired and may be misunderstanding the internals of renpy again; but after putting in a lot of debugging in my code; I think all of the transforms do run simultaneously (a thread for each maybe?), but are immediately canceled or something by the next one in the list.

Doing this solves the issue:

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renpy.show( 'something', at_list=[ place( 0, 0 ) ] )
renpy.pause( 1.0 )
renpy.show( 'something', at_list=[ slide( 200, 1.0 ) ] ) 
renpy.pause( 1.0 )
renpy.show( 'something', at_list=[ slide( -200, 1.0, start_offset=200 ) ] )

however, this means I can only control 'timings' for one 'something' at a time.

I cannot do something like this (see below); I cannot animate objects B and C at the same time and have them transform themselves in an order/sequence with different timings...
place (object B), wait 2 seconds, slide 200, wait 3 seconds, slide -200
place (object C), wait 3 seconds, slide 400, wait 2 seconds, slide -400, wait 5 seconds, slide 600


if the timings were the same; then I could do:

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renpy.show( 'B', at_list=[ place( 0, 0 ) ] )
renpy.show( 'C', at_list=[ place( 0, 0 ) ] )
renpy.pause( 1.0 )
renpy.show( 'B', at_list=[ slide( 200, 1.0 ) ] )
renpy.show( 'C', at_list=[ slide( 400, 1.0 ) ] )  
renpy.pause( 1.0 )
renpy.show( 'B', at_list=[ slide( -200, 1.0, start_offset=200 ) ] )
renpy.show( 'B', at_list=[ slide( -400, 1.0, start_offset=400 ) ] )

I think it would help if we can somehow associate a callback to each transform, so that I can time/call each transform in a chain. Or Is there another way I can achieve this?

Regards,
Ches

[PyTom]

Isn't this pretty much what ATL is for?

[nyaatrap]

You can include other transforms in a transform to make a composite transform. You can also include functions in a transform (that should perform as callback).

[Counter Arts]

What about this for your two display objects at the same time?

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transform transformB:
  pos (0,0)
  time 2.0
  linear 1.0 xpos 200
  time 3.0
  linear 1.0 xpos 0 # assuming slide does something by relative positioning to previous position

transform transformC:
  pos (0,0)
  time 3.0
  linear 1.0 xpos 400
  time 2.0
  linear 1.0 xpos 0
  time 5.0
  linear 1.0 xpos 600

show somethingB at transformB
show somethingC at transformC
  

Edit: I'm guessing you might be used to old school style of animation programming? Take a look at this page for ren'py.

http://www.renpy.org/doc/html/trans_trans_python.html