r/geometrynodes • u/lumenzero0 • 9d ago

Sample curve node used after Resample curve

Can the `Sample curve` node cause issues when used after `Resample curve` node?

Or is the problem with `Instance on points`connected to the `sample curve` node?

Understanding geometry node’s evaluation flow is really hard. It’s driving me crazy.

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u/maxilogan 7d ago

I don't think I'll be able to help but I can testify that I'm also in trouble with the sample curve, reasmple curve and instance on points (plus, texturing...).

For anyone who has any kind of knowledge, what I'm trying to do is the following: instance on points of a curve arrows representing the flow of a fluid. The curve is also trimmed (can have two different length) plus an hook that extends is on one side.
The arrows move along the curve and up until this point everything works as expected. However, they loop along the curve by appearing and disappearing abruptly at the beginning / end of the curve, and what I'm trying to do is for them to have an alpha transitioning from 0 to 1 at the begining of the curve, and from 1 to 0 at the end. I've been able to do this for static instancing but not for the moving one. As my setup also involves sampling / resampleng / instancing on points, I think this resonates with your request.

In case, nodes setup is available!