hi,i use carve op to clip a poly curve,how can i get the U value and save to a point attribute for evry point on curve ?thank advanced.

Not sure how that relates to the carve sop. But just to get the U value at each point on a curve add a UVTexture sop set to rows and columns the uv texture attribute will then contain what you need.

you can also try the fit($PT, 0, $NPT-1, 0, 1) gag in an attribcreate sop.

Frankly, it's so usefull, I'm surprised that we haven't been lobbying SESI to make it a global…

G