Add Ping-Pong loop mode for AnimatedSprite2D

[danikaze]

Describe the project you are working on

Generic and basic 2D project

Describe the problem or limitation you are having in your project

Looping animations is possible with AnimatedSprite2D but they always loop frames as 1, 2, 3, 1, 2, 3...

Looping in ping-pong mode is a very common use case, the same way as it was added for Tilemaps: 1, 2, 3, 2, 1, 2, 3, 2, 1...

Describe the feature / enhancement and how it helps to overcome the problem or limitation

It would be nice if there was a bool under the Animation properties for a tile that I could click on which set it so that when the tile animation reached the end, it would reverse the frame order and go backwards right to the start.

Describe how your proposal will work, with code, pseudo-code, mock-ups, and/or diagrams

It could be a bool added between the loop icon, or a selector if other modes are added (are there?)

If this enhancement will not be used often, can it be worked around with a few lines of script?

It can, but having to add the script to manage every possible animation with a simple state machine, or even duplicate the number of frames... but it would be a hassle and it's better if it's an animation property that can be enabled/disabled programmatically.

Is there a reason why this should be core and not an add-on in the asset library?

This is a very common animation functionality in games (for walking, actions, blinking eyes, moving mouths, etc. etc.)

[AThousandShips]

This would be implemented under SpriteFrames I'd say per animation, as looping in general is handled there and not in AnimatedSprite2D

[danikaze]

How is this a duplicated of #11697 ?

[danikaze]

This would be implemented under SpriteFrames I'd say per animation, as looping in general is handled there and not in AnimatedSprite2D

Yes, in the same level as the Loop flag, which is applied per animation :)