I'm a houdini beginner and I've been breaking my head over this for a while now, please #help




I setup this test scene for readability.
Its what I get with ray sop, got two objects and projecting a line on them.

HOWEVER, I'd very much like to find a way to smooth out the 'hanging' regions of the projected curve,
like what would happen naturally with a silk sheet for example.



I can't use shrinkwrap cloth stuff (iTried)
because I need lines to be geometrically perfectly straight except for Y axis

I googled and chatgpt'd this issue to no success, any help much appreciated.

Try using vellum hair and simulate it the line falling on the collider using vellum drape.

Assuming the above is simplified geometry, if you found your line was getting slightly bent on the x axis you could always follow it with a point wrangle to move the points back to their original x position.
Connect your vellum result into the first input (input 0) and connect your original undistorted line into the second input (input 1), then copy and paste:

@P.x = point(1,"P",@ptnum);

There is also the labs node called "edge_smooth"

"group" sharper edges by the angle between them.....then adjust.