Using keyframes to define values in a geometry node (arrow creation)

Question

This answer explaining how to create arrows using Geometry Nodes is very useful.

I was wondering if it is possible to define start and stop times for the animation of the arrows using keyframe controls, instead of having to adjust values in the Start Frame / End Frame Geometry Nodes?

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score 0 · Answer 1 · answered Oct 11 '22 at 11:32

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Hover mouse cursor at any value in any node and press I - It will add a key frame as usual.

You can also connect value to group input, in this case you will be able to add keyframes in modifier, so that it will be per object.

answered Oct 11 '22 at 11:32

Crantisz

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I don't think that works as I imagined for the example (apologies if my explanation isn't clear). In the example shown, I would like the animation to start (eg) at frame 5 and end at frame 100. If I add a keyframe to the End Frame Property, that won't show me where the arrow starts and ends on my timeline. example here: https://imgur.com/a/u8oZhYc – tomh Oct 11 '22 at 11:47
End of Trim curve node is from 0 to 1. You can remove time nodes and drive it directly using keyframes. – Crantisz Oct 11 '22 at 11:49
@tomh: this is how it looks what Crantisz meant (i believe): [1]: https://i.stack.imgur.com/YFjWz.jpg so your keyframes fits to your visible result – Chris Oct 11 '22 at 12:03

score 0 · Answer 2 · answered Oct 14 '22 at 21:10

In this case, the current setup can easily be extended to achieve the desired goal:

Here I simply use an additional integer value at the input From Min of the node Map Range, which controls the trimming of the curve.

Of course you can also provide these two values (Frame Start and Frame End) via a Group Input and control it with keyframes.

Using keyframes to define values in a geometry node (arrow creation)

2 Answers2