2D Trail Effect - Unity

Want to make your dash look cooler? Or maybe make your projectiles look more dynamic? You have come to the right place!

This tool is:

- Easy to use: Just a quick and simple setup with just 2 steps, and you're good to start spawning different trails.

- Accurate calculations: The trails are precisely calculated to ensure consistent spacing, even with inconsistent frame rates. No more weird gaps caused by deltaTime inconsistency.

- Highly customisable: Colours, sizes, lifespan, spawning interval, even with 4 built in easing equations! Not only those, you can also customise the trail sprite, enabling physical collisions on trails. Want more than just easing? Animation curve has got you covered.

Check out the example scene and documentation (English and Chinese versions available) to get started.

There are 2 versions of this tool - a free version and a paid version. This is the paid version which contains the full set of features. If you are not sure about buying yet, feel free to try out the free version with the core feature and basic customisations first.

If you have any questions or problems, please pull a request or report an issue in the Github page (please specify the request as Pro version), or contact me via this email address: heinokchow314@gmail.com

*Only designed for 2D projects

*The trail might work with the built-in render pipeline, but since this asset is developed using the URP render pipeline, setting URP up before importing this asset is still recommended

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Features in both free and Pro:

• Simple function calls: Start or stop spawning trails with just two simple function calls.
• Customisation: Full control over how the trails look including: the order in layer, the colour gradient, the size, the lifespan, the spawn conditions, even the easing type.
• Accurate trail position: Precise calculation for each trail object, ensuring smooth and accurate visuals even with inconsistent frame-rate.
• Built in easing equations: Include 4 types of easing equations: sine, exponential, circle and elastic. These affect how trail size changes over time (colours too if you want), and you can use them in your own project too!

Features exclusive to Pro:

• Profiles: Creating trail profiles, reusing settings. You can also switch between profiles during runtime, allowing one game object to spawn different type of trails!
• Solid colour trails: You can choose to let the colour gradient override the sprite's colour completely instead of tinting into it.
• Specify trail sprites: You can use different sprites for trail objects. You can specify one or multiple sprites, and choose whether to cycle through them in-order or pick the sprites randomly.
• Scaling curve: Another method to customise the scale change over time: Animation curve. Instead of relying on the easing equations, you can customise the curve however you like.
• Physical trails: You can enable physical collision on trails, turning them into more than just a visual effect and interact with your gameplay!
• Easier coding: Extension methods that let you write shorter and cleaner code.
• Events: You can listen to events including: on profile changed, on trail started, on trail ended, on trail object initialised, on trail object disabled and on will destroy trail object.

Experimental Features (Pro):

• Auto start trail: You can let a game object automatically start a trail when its speed has exceeded a specific threshold. You can also write your own custom condition if this condition doesn't fit.
• Auto stop trail: You can let a game object automatically stop its trail, conditions including: 1) when the condition to auto start trail is not met anymore; 2) after a certain time or 3) after the game object has moved for a certain distance. You can also write your own custom condition if none of the built in conditions fit.