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I am trying to create a simulation that, at a certain point in time, creates a point, attache an instance there, and then scale it from 0 to 1. And upon reaching scale 1, goes back to scale 0. And at this point, it disappears. I can make mesth to points, intance to point, then create the point inside the simulation node, and I can give an age to the point, so it dissapears. My main concern is the scale up and down. I think I can do this with the sine math node, with some fine tuning, but I would like to be able to do it with conditionals. That is, if the instance scale is greater than 1, instead of getting bigger, it gets smaller. I know this can be done (at least I think so) with the repeat zone, but I would like to know how to do it in the simulation nodes. Thank you so much.

faustoart
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  • i will help you with that if you provide a blend file how far you have come and that i don't waste my time building it from ground up. And remember: you want help for free from us in our spare time -> so you should make it as easy and fast as possible to help you. thx. – Chris Nov 09 '23 at 09:22
  • Does this answer your question? Time offset in Geometry Nodes? – Markus von Broady Nov 09 '23 at 11:10
  • This would not necessarily involve a simulation.. as described, that could just be, say, a mapped Float Curve on the time. Can you describe the desired effect, more precisely, rather than the method, so as to avoid possible XY ? – Robin Betts Nov 09 '23 at 12:38
  • Hi! The desired effect is to create an effect where one instance is created, when it's created it scales from 0 to 1, and when it gets there, it scales back from 1 to 0. When the scale is 0, it's deleted. It can be achieved with math, using for example the sine, but what I wanted was to use booleans (if scale => 1, then scale it down back to 0). – faustoart Nov 11 '23 at 17:32
  • I achieved this using the Swith node, that can work with float numbers, so it's as easy as using a math node (greater than) as a contraint. When the scale of the instance is 1, it scales by 0.9, so it just shrinks. I'm still working on improve the method, since I find it really useful and straight forward for animation within the geo and sim nodes. Just for begginers like myself, I recommend to check very well the options within the nodes, since my problem was that I thought that the swith node only work with geometry. Anyway, thank you for your time! – faustoart Nov 11 '23 at 17:32

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