I am trying to move points on a plane in a sine wave pattern but only a specific vertex group. I have no clue where to even start in the geometry nodes panel.
So far I have created my plane and assigned the selected points to a vertex group. Let's call the group my_points for this example.
Now that I have the plane and vertex group, how do I apply a sine wave to those points in geometry nodes? Ultimately I want to do more such as tie the phase of the wave to the frame number, but for now, I just need a nudge in the right direction to get started by getting those points into play in the nodes editor.
UPDATING MY QUESTION
I tried the nodes from the first answer. I don't get anything even similar. Can you spot what I have done wrong?
Here are the results I end up with...