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Exponential Curve in Xpresso
Hello all, Im pretty new to C4D (been using 3dsmax for years though) and even more recently..as in just this week i started looking into xpresso. Im becoming comfortable with it pretty quick because im pretty fluent in writing expressions for after effects. Its just gettin all the subtle differences down. So anyways with that said here are my questions…
I looked up and found tutorials on making sine waves with the formula node which i tried doing on my own but found i had to write it a bit differently after seeing the tutorial. Its using absolute(sin) to bounce a ball, but what im trying to do that the tut doesnt show is decay the bounce…i took the output of the formula and with a math node /time, and that sort of worked but not as nice as an exp curve would so what is the code i need to divide my formula by an exp curve…can i do it in the same formula node, i get an error with everyway i try to write an Math.exp(time) type thing..?
…and if anyone knows of any great resource for learning more about xpresso id love to see them. thanks.
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1 Reply
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Hi,
I am starting out learning Xpresso.
I don’t know the answer to your question but this might help.
CSTools (https://sugarfilmproduction.com/CSTools.zip) is a free pack of presets and expresso set ups. Really useful by the way, lots of people seem to use the tools, I have used the camera rigs a lot.
Anyway, there’s a preset called CS SpringNull which is a pre made set up for the ‘bounce, decay’ behaviour you mentioned. It works with position and rotation.
You just parent your object to it and it works. The documentation that comes with the download explains everything you need to know.
Anyway, maybe by looking at the Xpresso it will give you some hints as to how to set it up yourself.
If you figure it out please post – I can set it up in AE, but like you can’t figure it out in Xpresso just yet. I’m working on a project right now, and for now CS Tools is proving real handy.
John
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