RectTransformAnimation.cs

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using System;
 
namespace UnityEngine
{
    [Serializable]
    public class RectTransformAnimation : SimpleAnimation
    {
        [Tooltip("The RectTransform to animate")]
        [SerializeField] public RectTransform rectTransformToAnimate;
        [Tooltip("The state of the RectTransform at the start of the animation")]
        [SerializeField] public RectTransform originRectTransform;
        [Tooltip("The state of the RectTransform at the end of the animation")]
        [SerializeField] public RectTransform destinationRectTransform;
 
        // It is mandatory to have a parameterless constructor to properly work with the SimpleAnimationsManager component in the inspector.
        public RectTransformAnimation() : this(null, null, null) { } 
        
        public RectTransformAnimation(RectTransform rectTransformToAnimate, RectTransform destinationRectTransform, RectTransform originRectTransform, float duration = 1f, Curve curve = Curve.EaseInOut, WrapMode wrapMode = WrapMode.Once)
        {
            this.rectTransformToAnimate = rectTransformToAnimate;
            this.originRectTransform = originRectTransform;
            this.destinationRectTransform = destinationRectTransform;
            
 
            this.duration = duration;
            this.curve = SimpleAnimation.GetCurve(curve);
            this.wrapMode = wrapMode;
        }
 
        public override bool Step(float deltaTime, bool inverseIfMirror = true)
        {
            bool endOfAnimation = base.Step(deltaTime, inverseIfMirror);
            
            rectTransformToAnimate.SetLerp(originRectTransform, destinationRectTransform, currentAnimationCurveValue);
 
            return endOfAnimation;
        }
 
        public override Object GetAnimatedObject(bool displayWarningIfNotApplicable)
        {
            return rectTransformToAnimate;
        }
    }
    
}