Interpolating from one animation(keyframe) to another?

[IdealistDeveloper]

Hey guys, I was curious as to if I can interpolate between one animation to another?

I am making a bunch of sword-swinging animations, and I want it to animate smoothly between one sword swing to the next. So, I decided to just make a bunch of animations that just have the position that the sword is in when it has been swung.

Now I want to make it so that if sword swing 1 has been animated and someone activates the event again, I want it to smoothly go from sword swing 1 to sword swing 2. However, if someone doesn’t activate it, I just want it to return to the sword holding animation. The key is smoothly, I don’t want a bunch of animations that are abrupt.

Right now, I am just making the entire sword swings, from sword holding to swing, back to sword holding. But, I realize that this system is probably more efficient and smoother if I just interpolate between keyframes.

Thanks,
Best regards,
IdealistDeveloper

[dthecoolest]

Yes you can, in fact that’s called procedural animation. To interpolate keyframes you can use tween service which does the CFrame lerping (interpolation) for you. This resource should help:

Procedural Animation: What it is and how to do it

Introduction This tutorial assumes you are familiar with basic animation terminology, basic animation theory and basic CFrame math operations. You should also be familiar enough with programming to adapt examples into full systems. If you want to know about procedural animation in general and some use cases for applying it, this GDC talk by David Rosen is both easy to understand and in-depth. Procedural animation, in Roblox, is a method of animation that doesn’t rely on animation tracks and i…

[IdealistDeveloper]

That uses TweenService to go from CFrame to CFrame. I want to go from keyframe sequence to keyframe sequence(in the animation). Is there a method of doing that?

[dthecoolest]

Hmm, for keyframe sequence to smoothen it out theres a thing called Animation Blending which you can adjust using animation weight and blend two animations together like walking and running:

AnimationTrack | Documentation - Roblox Creator Hub

Maybe this thread can illustrate how it is used:

Blending Walking and Sprinting Animations

I’m trying to smoothly transition between a set of walking and sprinting animations using :AdjustWeight, but I get a slight stuttering effect when I do so. I blend the animations by initially playing them with a close to zero weight and adjusting their weight based on the direction of the character’s movement. I think my issue might occur because the walking and sprinting animations have a different length but I can’t think of a way to compensate for this. I tried adjusting the TimePosition of t…

Another way is to, obtain the CFrames inside the keyframe to tween so you will need to obtain the following:

Get CFrame from Animation ID possible?

Using KeyframeSquenceProvider:GetKeyframeSequenceAsync(animationID) you can obtain a KeyframeSequence which you can then call :GetKeyFrames() to obtain the Keyframes which you can call :GetPoses() on to get the Pose objects which are named after the parts they manipulate. Each pose may contain subposes obtained with :GetSubPoses(). Each pose doesn’t actually affect the part CFrames directly, but through Motor6D instances and each pose specifies a .CFrame that changes the Motor6D.Transform proper…

Or you can obtain the model’s current CFrame then use that to tween to another pose on the keyframe, In short, it’s going to be difficult.