Hello forum.

As i´m still a beginner in houdini, I hope you can give me a hint for my problem.

I try to copy some lines on a circle via "copy to points". I use a orientalongcurce to align them. The Problem is,
that my tangentu-vector gets modified, so that its not pointing along the curve anymore. Is there
a way to preserve the tangentu?

Thank you very much.
Jan

Jan Sickinger
The Problem is,
that my tangentu-vector gets modified, so that its not pointing along the curve anymore.

You mean not modified. You can see it's still pointing in the same direction as before the curve was transformed. For the copy to points to transform attributes, they must be in the attributes to transform mask, as well as tagged as what type of transforming attribute: position, vector, normal, quaternion, transform matrix. The AttribCreate node can set this flag when creating the attribute or add it to an existing one. There is also a vex function setattribtypeinfo that can set the flag.

Thank you!! That did the trick.