SOP group inside a POP network

Forums Houdini Indie and Apprentice SOP group inside a POP network

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nelpiper73: Member; 80 posts; Joined: May 2017; Offline

Sept. 30, 2022 3:12 p.m.

Hey guys.

I made a primitve group in SOPs and in a pop network I want to apply drag only to the particles inside that group. How can I do that?

Thanks.


sepu: Member; 474 posts; Joined: Feb. 2012; Online

Sept. 30, 2022 5:10 p.m.

pop nodes have a group parameter that you can use for your group sop.

Attachments:
houdini_4BR942Rcfj.png (28.3 KB)


nelpiper73: Member; 80 posts; Joined: May 2017; Offline

Sept. 30, 2022 6:17 p.m.

That doesn't work. I tried but it shows only "stream_source_first_input"


sepu: Member; 474 posts; Joined: Feb. 2012; Online

Sept. 30, 2022 6:35 p.m.

yes, it does.

You can always use pop groups or streams as well

Edited by sepu - Sept. 30, 2022 18:39:15

Attachments:
houdini_5AUwXCl9Tr.png (64.7 KB)
houdini_IcqCLRthIf.gif (5.2 MB)


nelpiper73: Member; 80 posts; Joined: May 2017; Offline

Sept. 30, 2022 6:45 p.m.

ok I see that your group is piped in the first input of the popnet. What if it's piped in the second input?


sepu: Member; 474 posts; Joined: Feb. 2012; Online

Sept. 30, 2022 7:24 p.m.

Then fetch the attrib from a pop wrangle and make sure to change the inputs to "second content geo..." You can either create a grp or an i@myattr and use the group in the pop nodes or vex expressions.

Also, why do you need the grp in the second input?

Edited by sepu - Sept. 30, 2022 19:36:03


nelpiper73: Member; 80 posts; Joined: May 2017; Offline

Oct. 1, 2022 12:36 a.m.

I was just testing but you’re right. I group transferred the group to the first input and worked fine. Thx

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