README.md

App::default()
    .add_default_plugins()
    .add_plugin(TweeningPlugin)
    .run();
commands
    // Spawn a Sprite entity to animate the position of
    .spawn_bundle(SpriteBundle {
        sprite: Sprite {
            color: Color::RED,
            custom_size: Some(Vec2::new(size, size)),
            ..Default::default()
        },
        ..Default::default()
    })
    // Add an Animator component to perform the animation
    .insert(Animator::new(
        // Use a quadratic easing on both endpoints
        EaseFunction::QuadraticInOut,
        // Loop animation back and forth over 1 second, with a 0.5 second
        // pause after each cycle (start -> end -> start).
        TweeningType::PingPong {
            duration: Duration::from_secs(1),
            pause: Some(Duration::from_millis(500)),
        },
        // The lens gives access to the Transform component of the Sprite,
        // for the Animator to animate it. It also contains the start and
        // end values associated with the animation ratios 0. and 1.
        TransformPositionLens {
            start: Vec3::new(0., 0., 0.),
            end: Vec3::new(1., 2., -4.),
        },
    ));
#[derive(Component)]
struct CustomComponent(f32);

struct CustomLens {
    start: f32,
    end: f32,
}

impl Lens<CustomComponent> for CustomLens {
    fn lerp(&self, target: &mut CustomComponent, ratio: f32) -> f32 {
        target.0 = self.start + (self.end - self.start) * ratio;
    }
}
cargo run --example sprite_color --features="bevy/bevy_winit"
cargo run --example transform_rotation --features="bevy/bevy_winit"
cargo run --example transform_translation --features="bevy/bevy_winit"
cargo run --example colormaterial_color --features="bevy/bevy_winit"
cargo run --example ui_position --features="bevy/bevy_winit"