GroveGames.Tween is a lightweight and extensible tweening library for Godot, designed to animate values smoothly over time. It provides an easy-to-use API for creating tweens and sequences, with built-in easing functions for smooth transitions.

• Flexible Tweening: Tween any type of value, including float, Vector3, and more.
• Ease Functions: Use predefined easing functions to customize the motion.
• Sequences: Chain tweens and callbacks for complex animations.
• Extensions: Built-in support for animating properties of Godot Nodes, such as position, rotation, and scale.
• Customizable Behavior: Easily add callbacks for updates and completions.

To add GroveGames.Tween.Godot to your project, install the NuGet package:

dotnet add package GroveGames.Tween.Godot

Alternatively, use the Package Manager Console in Visual Studio:

Install-Package GroveGames.Tween.Godot

Once installed, ensure that your project references the GroveGames.Tween namespace and its sub-namespaces.

using Godot;
using GroveGames.Tween.Core;

public class Example : Node3D
{
    private TweenerContext _tweenContext;

    public override void _Ready()
    {
        _tweenContext = new TweenerContext();

        // Move this Node3D to a new position over 2 seconds
        this.MoveTo(new Vector3(5, 5, 0), 2f, _tweenContext)
            .SetOnComplete(() => GD.Print("Move completed!"));
    }

    public override void _Process(float delta)
    {
        // Update tweens
        _tweenContext.Update(delta);
    }
}

using Godot;
using GroveGames.Tween.Core;

public class SequenceExample : Node3D
{
    private TweenerContext _tweenContext;

    public override void _Ready()
    {
        _tweenContext = new TweenerContext();

        var sequence = _tweenContext.CreateSequence();
        sequence
            .Then(this.MoveTo(new Vector3(5, 5, 0), 2f, _tweenContext, false))
            .Wait(1f)
            .Callback(() => GD.Print("Reached target!"))
            .Play();
    }

    public override void _Process(float delta)
    {
        _tweenContext.Update(delta);
    }
}

The library includes handy extension methods for Node3D, Node2D, Transform3D, Transform2D, etc. objects. Examples include:

• MoveTo(Vector3 target, float duration, TweenerContext context)
• RotateTo(Vector3 targetDegrees, float duration, TweenerContext context)
• ScaleTo(Vector3 target, float duration, TweenerContext context)

Each method has variations to animate specific axes (e.g., MoveXTo, RotateYTo).

• void SetEase(EaseType easeType)
• void SetOnComplete(Action onComplete)
• void Stop(bool complete)
• void Update(float deltaTime)
• void Pause()
• void Play()
• bool IsRunning
• bool IsPlaying
• float Duration

• void SetOnUpdate(Action<T> onUpdate)

• ISequence Then(ITween tween)
• ISequence With(ITween tween)
• ISequence Wait(float interval)
• ISequence Callback(Action callback)
• void Reset()

Customize your tweening with easing functions defined in the EaseType enum. Example:

tween.SetEase(EaseType.QuadInOut);

Provide your own interpolation function for advanced use cases:

var tween = context.CreateTween(
    () => currentValue, 
    () => targetValue, 
    duration, 
    (start, end, t) => start + (end - start) * t
);

Contributions are welcome! Feel free to submit issues or pull requests to improve this library.

This project is licensed under the MIT License - see the LICENSE file for details.