1
$\begingroup$

I'm working towards making an intro video similar to the old FIA F1 intro: https://www.youtube.com/watch?v=qgiBkydMW8k

I had some questions about path following previously: How can I have multiple objects follow a single path but maintain their original offset?

I've got a good set of nodes now for creating a "noisy" curve and causing the object to follow that path (original file):

I'm struggling now with adding "random noise" to that path follow. In other words, as the object follows the path, I want to randomly insert noise into the position/translation or rotation or scale. Unfortunately, I'm struggling to figure out how to do this. If I manage to get anything to "add," it usually ends up deforming the object and not actually moving the object.

  • adding an additional "transform geometry" works, but whenever I try to plug something into it, the line turns red: invalid vector addition?

  • using set position with the offset and a noise texture results in the object being deformed: deformed object

I'm not really sure how I can add some randomized translation/rotation/scale to this object after the path follow is implemented. Can someone help?

Updated file:

Updated nodes: added object sampling

$\endgroup$

1 Answer 1

1
$\begingroup$

Add Noise Texture to the Position

You're using a Sample Curve node to get the position along the path. If you add noise to this position you should get the jitter you're looking for.

enter image description here

A General Case

For a more general case in which the object is being translated in world space rather than along a curve, use a Set Position Node:

cube moving on y axis with noise

The Set Postion node will set the position of each vertex in the geometry base on the inputs.

We want to offset the position of each vertex based on the object's location in the world. Use the Object Info node to obtain the object's Location. run that through a Noise Texture node to get some randomness to the movement. Plug the resulting vector into the Offset input of the Set Position node.

Now the cube will appear to wiggle randomly as it moves through world space.

$\endgroup$
9
  • $\begingroup$ Is this an additional geometry node setup that you've attached, or is this the only thing attached to the cube? When I tried to use "set position" with my blenderfile (shared in the OP), manipulating the offset did not move the object (no input to set position other than me manipulating values directly) $\endgroup$ Oct 16, 2023 at 19:55
  • $\begingroup$ Actually, set position will offset the object from the curve, but if you look at the edit/picture I just made, adding noise to the offset results in deformation of the object and not actually movement off the path. $\endgroup$ Oct 16, 2023 at 20:04
  • $\begingroup$ OK, I've updated my blend file above and when I move the object in space (eg: g+x) it does jiggle around. However, as I manipulate the "factor" setting for the curve sample (which is how it's following the path), it doesn't jiggle around. Whatever the singular value of the original position of the object was is offset by some noise, but it doesn't update as it follows the path. $\endgroup$ Oct 16, 2023 at 22:12
  • $\begingroup$ @ErikJacobs I updated the answer for your specific case where the desired object position is coming from the Sample Curve node. You can add in the noise right there $\endgroup$ Oct 16, 2023 at 22:54
  • $\begingroup$ This is working almost perfectly, but in my particular case, it is now losing the "anchor to start" aspect. The noisyness needs to stop at the original position. The YT video has the noisy letters flying in and ending up in their final resting position, which is what I'm trying to achieve here. I tried plugging the output of the anchor to start block (map range) into various places before the transform geometry from your modification but was unsuccessful. Q: How would I limit the injected noise to zero at the "start" of the curve? $\endgroup$ Oct 17, 2023 at 12:54

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .