Rotate the vector by 90 degree does not seem work

Grasshopper
1

I am trying to rotate the vector by 90 degree, but it does not seems work. not sure which part goes wrong
Q_Why rotate vector does not work.gh (4.3 KB)

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image1542×522 40.6 KB

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@Liu_Xiang, Currently you are assigning the same vector as input and axis of rotation. It wont give you the correct result. You need to assign Unit Z Vector Component to the X input of VRot Component.

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Thanks so much !