Trail 2D

[github-actions]

Description

Adds 2D trail objects that follow another object as it moves.
Customize the trail appearance with up to 2 colors, blended together as a gradient.

How to use the extension

1. Add a Trail2D object to your scene, depending on your game's dimension.
2. Configure the trail's colors and gradient in the object's properties.
3. Use the object's actions to attach it to the object you want to leave a trail behind.

Checklist

• I've followed all of the best practices.
• I confirm that this extension can be integrated to this GitHub repository, distributed and MIT licensed.
• I am aware that the extension may be updated by anyone, and do not need my explicit consent to do so.

AI usage

• I used an AI to generate some part of the code.
• I don't understand the generated code or I don't feel able to modify it.

Example file

Trail2D-Exemple.zip

Extension file

Trail2D-Extension.zip

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Extension by @Alainlusk

You can update the extension on this "Pull Request" by commenting the update command: in the comment field, type !update, then drag and drop a zip file with your extension file in the commenting field, like how you initially submitted the extension. It should look like this:

!update [MyExtension.zip](https://github.com/GDevelopApp/GDevelop-extensions/files/12709661/MyExtension.zip)

It can take a few seconds for the file to fully upload and show as the above. Once it is like shown above, click "Comment" and let the bot do the rest!

[D8H]

Thank you for submitting an extension.

Have you tried this other extension?

• [Community] [Sprite rope] Bend an image to follow a rope #1241

[Alios5]

Yes, I'm well aware of your extension, I've used it several times and it actually served as the basis for developing this (which is why you're listed as co-creator).

While using it for trails, I ran into several limitations:

It's never been added to GDevelop's official extension library despite being around for a while
The trail's behavior seems tied to framerate/performance (shorter or longer depending on the machine)
Bug: the trail can disappear past a certain distance from its origin when following an object
Initialization bug: the trail starts at (0,0) before catching up to the target object, causing an unwanted jump at the start
It requires a texture, whereas I sometimes just wanted a simple gradient between a start color and an end color

That's why I built this new extension - mainly to make creating trails easier, not to redo the same thing, but to build on your work and improve it. @D8H