Hi,

I want to switch two object with “switch node”,for example,there is a sphere object node,an object merge node and a switch node in the scene,if there is no object in the merge node,the switch input is 0,else is 1,how to achieve this goal?I tried to write a expression code(as in the screenshot),but doesn't work,could you help me?Thanks in advanced!

Greeting.
You can use npoints function to get number of points in your object merge if it would be zero then it goes with sphere.
Documentation page for npoints:
http://www.sidefx.com/docs/houdini/expressions/npoints [www.sidefx.com]

for your file do this in switch1:
if(npoints(“../object_merge1/”) != 0, 1, 0)

Hi,Nima

Thanks very much! It is working nice!

or even

if(npoints(“../object_merge1/”), 0, 1)

Of course the you have to use " not “ or ”.
Cheers, D

Hi,

You can also just do something like this:

Hi

I just found this thread.

There is also a new node to 18.0 called switchif.

https://www.sidefx.com/docs/houdini/nodes/sop/switchif.html [www.sidefx.com]

Best

Mark