These work very well! Thanks for shedding light on two different ways to accomplish this.
A couple questions about the XPresso and User Data method: why did you create the Null_User-Data node to control the movement of the point along the circle spline when the spline node itself has an offset parameter that controls this movement in the same way (I imagine there is some benefit)? Further, it seems like the offset parameter in the Null Node and the Spline Operator will only allow a movement of 0%-100%. Is there a way to expand this to allow for an animation that traverses the spline many times?

I need a single point on a linear spline to animate along another circular spline while the other points on the linear spline are stationary. The linear spline only has two points, one on each end. How can this be done?

Thanks!

SinglePointAnimation1.c4d

Apologies for the bad file. I've linked to a wetransfer file. The pose morph works, but because the point order is jumbled, and I'm unable to reorder it, the animation is all over the place. I've since resolved the issue by making the Noisy Circle spline a child of a Connect Object and using Current State to Object. This seems to have reordered the points in a way that does not appear to inherit the point order from the original spline that was modified withe the Symmetry Object. Though this solution seems sufficient, if you have any additional insights on this issue please share. Having more than one way to solve a problem is often indispensable.
https://we.tl/t-xJZpsBlcPa

I'm using the pose morph tag to morph between two spline shapes, a circle and a noisy circle. The issue I'm running into is that I'm not allowed to set the first point or modify the point order on the noisy circle to ensure a smooth and uniform morph between splines. The noisy circle was generated using a symmetry object, which it seems has made a mess of the point order. How can I rectify this issue? CircleMorphTest1.c4d

I've attached the project for reference.

As always very helpful. Thanks!

When I change the scale of an object with the scale tool the scale parameters in the attributes panel do not change. Therefore changing the scale of an object cannot be animated this way. I can animate the scale manually by clicking the individual keyframes in the scale parameters, changing the scale parameters, moving the timeline, and then clicking the individual keyframes of the scale parameters again. Though I don't see why we should have to do this when there is a dedicated scale tool and an auto-keyframe feature. Is this a bug?

@Dr-Sassi
This works very well with one caveat. The viewport animation is now disruptively slow. In full appreciation of your wizardry, is there a way to do this that doesn't slow down the viewport animation?
Much appreciated,
gabe

ParticleAdvectTest1.c4d

Hi Dr. Sassi,
Is there a way to make particles visible only when they are moving? I'm using Pyro Advect to move particles that are stationary before they are advected. The issue I'm having is that I don't want to see the base of static particles, only the particles that are being effected by the advection.
Thanks!

Gabe
ParticleAdvectTest1.c4d

Thanks Dr. Sassi, all very helpful. I was able to use the Sancho hand bones structure to better rig my hand. I also lowered the resolution of the hand geometry and it moves very similar to skin.

Frame 120 in the attached .c4d demonstrates the most egregious example of the animation breaking geometry. How do I stop this from happening?

https://we.tl/t-1iRlr3v55l

Thanks!