Hi all,

Given a point with position (x, y, z) that technically lies on a prim edge (or very very close), what is currently the best way to add this point on the prim (subdividing the edge / adding a vertex)? Using Python/VEX?

I'd like to maintain attrs/UVs on the prim and just add a point. (Let's assume I know which edge I'd like to add the point to.)
I have checked https://www.sidefx.com/docs/houdini/vex/functions/addpoint.html, [www.sidefx.com] but I'm not sure if this is the right starting point.


Any input welcome!

Thanks,
m.

your easiest bet may be to feed something into the polysplit SOP - figure out which edge you want to insert a point, and decode polysplit's magical syntax (eg “245e2:0.75”, which is i think “edge number: split ratio”). there are examples in the docs.

i've done some stuff with slicing polys and interpolating attributes all in vex (per face slicing), but it gets complicated real fast. best if you can piggyback on one of the factory nodes if you can.

cheers,
chrisg

You have to delete the prim and recreate it with your new point. For attribute preservation you can use Attribute Interpolate but you still need to create UV/weight attributes (point, prim, vertices) using the parent elements of each of your new points.

I made a similar thing that slices any type of polygons (open or closed) in VEX:

Hi guys,

Thanks for the inputs, I'll think about them.

Very cool work on that carve sop by the way!