Playback mode Ping Pong stops at second frame

Questions
#1

Hi there,

I have this flip book animation of a trap that I want to play once in PINGPONG mode so the trap comes out of the ground and disappears in the ground again.

As seen in the video I am currently facing the issue, that after playing the animation once forward, the animation stops at the second frame when playing backwards again.

For the animation I use 4 images with 12 FPS (I varied the FPS with no difference) in playback mode Once Ping Pong.

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Screenshot 2019-04-26 at 23.10.38.png1142×436 37.4 KB

I know there is a simple solution in either using 7 images and playback mode Once Forward or just duplicate the first image and use playback mode Once Ping Pong since the second image would also be the starting point.

Since the description in the manuals is a little bit vague about this:

The pingpong modes run the animation first forward, then backward. A set of corresponding modes exist for GUI property animations:

I wanted to raise the question if this behaviour is intended.

Kind regards,
Kai

2 Likes
#2

This has been discussed before but I can’t recall exactly our conclusion. If the playback mode was loop ping-pong then you’d probably not want it to repeat the first frame. For loop once then both including and excluding the first frame might be acceptable, but I’m leaning towards excluding it (existing behaviour). Imagine that you want to chain animations, then you’d probably don’t want it to go back to the first frame.

1 Like
#3

Thanks for the quick response.

Makes sense. Maybe it would be good to have this behaviour documented somewhere.

Kind regards,
Kai

1 Like
#4

Yep, good point. Will fix next week.

1 Like
#5

Added a side-note the flipbook animation section of the Animation manual. I also updated the sprite flipbook example to use sprite.play_flipbook() instead of the play_animation message.