Reading Anim curve float values at all time

[Elseware-Experience]

Hello there !
I am currently working on a system for stop animations to detect the right timing to start and for this I need to evaluate the float value of an animation curve (to find the right foot height for instance).

I started a quick script to do so but I can seem to understand how to find the UID of an animation curve, given I have its name.

Here a quick screenshot to see where I am at

From what I understand I need to access the FSmartNameMapping, then given the name of the curve, get its UID. Any idea how to do so ?

Thanks a lot !!!

[ZkarmaKun]

hey, from the AnimSequenceBase you can access the FRawCurveTracks, this struct holds arrays of float, vectors of transforms curves, and from those you can simple evaluate to get your value

[Elseware-Experience]

Thanks mate, works great. I do obtain the right value from this anim sequence for instance

Using this code (commented for people that might need it scrolling the forum)

My only regret is that I can’t seem to find a way to get the right curve with the name and not just a number that might change depending on the anim sequence.
If you have any idea about this I take it, else well, I will have to put things in order :).

[Waves]

You need to use FSmartName

            const FRawCurveTracks& Curves = Anim->GetCurveData();
            FSmartName CurveName;
            Anim->GetSkeleton()->GetSmartNameByName(USkeleton::AnimCurveMappingName, TEXT("Distance"), CurveName);
            const FFloatCurve* DistanceCurve = static_cast<const FFloatCurve*>(Curves.GetCurveData(CurveName.UID));

You can get the FSmartName from the AnimSequence skeleton. Then get UID from the SmartName,

[anonymous_user_864904b2]

Hello, does anybody managed to get curve value in packaged build (Curve dissapears after building the project in my case)

[Waves]

You are correct. Packing the project with Shipping build causes the curves to go missing. There are no 'With_Editor" macros involved in any of the needed class members or functions that I could find. Perhaps this happens due to cooking/compression on the animation or curve data?

[BrUnO_XaVIeR]

Many UObjects from AnimGraph are baked once you package in Shipping mode.

[Waves]

UE4 4.24 will have a new “UniformIndexable” Compression setting that will allow reading curves like this.

[Geckaster]

UniformIndexable still doesn’t seem to fix shipping builds for me. I can get the curve’s FSmartName and UID, but UAnimSeq->RawCurveData.FloatCurves is empty.

[dxd39]

May be it is the answer, but i don`t know why not cook all Curves Data?

[Joker921]

@dxd39

May be it is the answer, but i don`t know why not cook all Curves Data?

Why does UE4 reset he curveData before serialize the anim sequence? I go through the montage code and the curveData is not reseted.