Fill a sphere animation

How to create a fill me up activity like in slide 1 of Fill My Cup! • Activity Builder by Desmos but for a sphere ? Thanks in advance.

Something like this should work. I have comments in the expression panel to help understand what’s going on.

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Thank you very much. It’s perfect.

I tweaked this a little to add the ellipse to the surface of the water.
Filling a sphere with surface ellipse


Thank you very much Susan_Lauer.

Thanks for doing that @Susan_Lauer. I adjusted the animation a bit to make the animation look more realistic instead of the constant rate that it showed before.


You beat me to it! I was going to do that next. Nice.

Thank you @Susan_Lauer and @cwinske for your ideas.

@nbastos Did you ever end up creating the fill me up activity for the sphere?