Justin Keil


About Me

VFX Artist
United States of America


Recent Forum Posts

Rotate Vectors Using Quaternions in Chops (with File) Feb. 28, 2018, 1:38 p.m.

Not sure what you really want to do in the end.

But I changed your file a bit, so it now can be modified for different results.

Thanks for that!

I actually figured something similar out- I took just the angle into chops for processing- then brought the revisions back into the sop network via a channel sop, and THEN applied the rotation -similar to what you did but you saved a few step — direct referencing the channel in the wrangle—ill be using that. Thanks!

Rotate Vectors Using Quaternions in Chops (with File) Feb. 27, 2018, 6:30 p.m.

I would like to use a quaternion rotation to rotate vector @N around vector v@cross. Easy enough in a wrangle, but id like to do it in chops to have added control over the anim curves.

My set up is not working though. Coming across an earlier thread it was pointed out that you need to use an attribute chop and the quaternion method to let you know that the incoming vectors should be operated on simultaneously, but I cant get it to work. Ive attached a file.

Attachment Not Found

Digital Asset that generates Sops Automatically (Resolved) Feb. 8, 2018, 11:53 a.m.

might be better to do something like this:

make an Add SOP
select it > shift + C to put it into a subnet
RMB Create Digital Asset
drag the “Number of Points” parameter of the Add SOP into the type properties of the HDA

now you can add as many points as you want to the Add SOP and have control over their positions.

Thanks arctor. That will work perfectly!