VertexGradientPlugin Error in Unity 2018.4.5

[smkplus]

Assets/CharTween/Scripts/VertexGradientPlugin.cs(14,18): error CS0534: `CharTween.VertexGradientPlugin' does not implement inherited abstract member `DG.Tweening.Plugins.Core.ABSTweenPlugin<TMPro.VertexGradient,TMPro.VertexGradient,DG.Tweening.Plugins.Options.NoOptions>.SetFrom(DG.Tweening.Core.TweenerCore<TMPro.VertexGradient,TMPro.VertexGradient,DG.Tweening.Plugins.Options.NoOptions>, TMPro.VertexGradient, bool)'

[archgame]

Adding the following code in the VertexGradientPlugin class, fixed it for me

public override void SetFrom(TweenerCore<VertexGradient, VertexGradient, NoOptions> t, VertexGradient vg, bool isRelative)
        {
            var prevEndVal = t.endValue;
            t.endValue = t.getter();
            t.startValue = isRelative ? Add(t.endValue, prevEndVal) : prevEndVal;
            t.startValue = prevEndVal;
            t.setter(t.startValue);
        }

[LiquidSebbey]

Did not work for me and the latest version of CharTweener gives me this error too. I am running 2019.4.4f1
Getting error:

Assets\CharTween\Scripts\VertexGradientPlugin.cs(14,18): error CS0534: 'VertexGradientPlugin' does not implement inherited abstract member 'ABSTweenPlugin<VertexGradient, VertexGradient, NoOptions>.SetFrom(TweenerCore<VertexGradient, VertexGradient, NoOptions>, VertexGradient, bool, bool)'

[alexpdaniel]

Try:

public override void SetFrom(TweenerCore<VertexGradient, VertexGradient, NoOptions> t, VertexGradient vg, bool setImmediately, bool isRelative)
{
var prevEndVal = t.endValue;
t.endValue = t.getter();
t.startValue = isRelative ? Add(t.endValue, prevEndVal) : prevEndVal;
t.startValue = prevEndVal;
t.setter(t.startValue);
}

I don't have any idea what the bool "setImmediately" will or won't do in this case, but it will at least get rid of that error and allow you to use CharTweener.

[Lir10]

For me it worked by adding the following:

        public override void SetFrom(TweenerCore<VertexGradient, VertexGradient, NoOptions> t, VertexGradient vg, bool  setImmediately, bool isRelative)
        {
            var prevEndVal = t.endValue;
            t.endValue = t.getter();
            t.startValue = isRelative ? Add(t.endValue, prevEndVal) : prevEndVal;
            t.startValue = prevEndVal;
            t.setter(t.startValue);
        }

        public override void SetFrom(TweenerCore<VertexGradient, VertexGradient, NoOptions> t, bool isRelative)
        {
            var prevEndVal = t.endValue;
            t.endValue = t.getter();
            t.startValue = isRelative ? Add(t.endValue, prevEndVal) : prevEndVal;
            t.startValue = prevEndVal;
            t.setter(t.startValue);
        }

[jomarcenter-mjm]

is this being fixed unity 2019.4.19 has the same error

[RuolinZheng08]

For me it worked by adding the following:

        public override void SetFrom(TweenerCore<VertexGradient, VertexGradient, NoOptions> t, VertexGradient vg, bool  setImmediately, bool isRelative)
        {
            var prevEndVal = t.endValue;
            t.endValue = t.getter();
            t.startValue = isRelative ? Add(t.endValue, prevEndVal) : prevEndVal;
            t.startValue = prevEndVal;
            t.setter(t.startValue);
        }

        public override void SetFrom(TweenerCore<VertexGradient, VertexGradient, NoOptions> t, bool isRelative)
        {
            var prevEndVal = t.endValue;
            t.endValue = t.getter();
            t.startValue = isRelative ? Add(t.endValue, prevEndVal) : prevEndVal;
            t.startValue = prevEndVal;
            t.setter(t.startValue);
        }

Thanks! This fixes the issue for me in Unity 2020.3.3f

[NathanOnUnity]

I was having this same issue but what I did was delete the Evaluate and Apply function then added this code in on line 93:

public override void EvaluateAndApply(NoOptions options, Tween t, bool isRelative, DOGetter getter, DOSetter setter, float elapsed, VertexGradient startValue, VertexGradient changeValue, float duration, bool usingInversePosition, int newCompletedSteps, UpdateNotice updateNotice)
{
throw new System.NotImplementedException();
}

This seemed to work for me in Unity Version 2021.3.8f1
The others did not work