RadMess Posted July 6, 2021 Share Posted July 6, 2021 Is there a way to export an objects rotation coordinates from Houdini into C4D? I have an element that's literally just a rotation and it seems only alembics work and those files get large quickly. Quote Link to comment Share on other sites More sharing options...
flcc Posted July 6, 2021 Share Posted July 6, 2021 The transformations that are at object level are exported by alembic or fbx (file menu) the same way. You normaly get it into C4d without any problem. If you talk about geo that rotate at Sop level it's another story. But it's difficult to answer without knowing anything about your setup. Quote Link to comment Share on other sites More sharing options...
RadMess Posted July 6, 2021 Author Share Posted July 6, 2021 Thanks for the response. Yes, the geo rotates at the sop level with a keyframed transform node. I can share a generic file: 210706_ROTATE.hiplc Basically that rotation will be swapped for lots of other geometry in C4D. I would love to use it as a parent or take its coordinates and apply it to another object. Seems like this would be simple and I'm missing something.... Quote Link to comment Share on other sites More sharing options...
flcc Posted July 6, 2021 Share Posted July 6, 2021 (edited) You have to think of the sop level as the edit mode of C4d. In edit mode, points don't have rotation information. just position. Sop level is the same. Transform node well... just tranform points. not really the "objects". But... you can pack your geometry and use intrinsic. check this page of cgwiki. https://www.tokeru.com/cgwiki/index.php?title=JoyOfVex18 You will find a much better explanation than I can give you. In short since you object are packed they act as points, and the orient information can be attribute of these points. Problem, i'm not sure how you can use these attribute in C4D. Maybe you could transfer your rotation attribute to Cd attribute. (C4d understands the CD attributes coming from alembic) Then in C4d use xpresso to get them back, but it seems to me a bit far-fetched. Edited July 6, 2021 by flcc Quote Link to comment Share on other sites More sharing options...
RadMess Posted July 7, 2021 Author Share Posted July 7, 2021 Ah I see. Thank you for breaking that down. Much more complicated than I thought. I'll check that approach out and see. Really appreciate your help! Quote Link to comment Share on other sites More sharing options...
eikonoklastes Posted July 9, 2021 Share Posted July 9, 2021 On 7/6/2021 at 10:41 PM, RadMess said: Is there a way to export an objects rotation coordinates from Houdini into C4D? I have an element that's literally just a rotation and it seems only alembics work and those files get large quickly. This is easily possible by packing the object, initialising a normal if necessary (not required if your object was already aligned to the world axes to begin with), and then using the Path attribute in the ROP FBX. Here's a preview of the exported tube: https://imgur.com/8xoYEYM Scene attached here. 210706_ROTATE_path_attr.hiplc 2 Quote Link to comment Share on other sites More sharing options...
RadMess Posted September 22, 2021 Author Share Posted September 22, 2021 Just seeing this! Thanks!! Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.