How to change U V direction?

hey,
I want to change the U and V direction. i only can find to change the NORMAL direction of a surface or to flipp it , but not the UV. anyone an idea?

thx

Hi,
Run the “Dir” command.

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I was just prepared to post a variation of the question above.

I was wondering how to change the uv directions to get all possible combinations according to the picture. I am trying to do this in python in grasshopper.

Is the normal independent of the uv directions?

Changing the u,v directions will not affect your surface normal in 3d modeling space.

I still need to swap the uv’s as illustrated. If it is possible. Even if the normal is independent.

Try this:

surface.Transpose() will swap values of u and v.
To change the direction of either u, or v: get the domain of one of these (uvStart, uvEnd = surface.Domain(0 or 1)), then create a new domain but with reversed negative values of previous one (-uvEnd, -uvStart). Then reverse the domain in that direction (surface.Reverse(0 or 1)).
By this logic, you can achieve all upper combinations.
Check the attached files.
uv.gh (19.2 KB)
uv.3dm (74.8 KB)

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Thanks for saving the day again. :smile:

thx for this advice…i tried it but ists sadly not solving my problem

Hi alxwu,
The upper grasshopper component works with no problem.
Could you attach your surface please?