Forums Houdini Indie and Apprentice Copernicus (COPS) Rasterize Setup not outputting anything

Copernicus (COPS) Rasterize Setup not outputting anything

   425   5   2
User Avatar
adamwlou
Member
7 posts
Joined: Jan. 2019
Offline
 
Hi guys,

I'm trying to use the 'SOP Import', 'Rasterize Setup', and 'Rasterize Geo' COP Nodes to get my 'P' Values into COPS so that I can run other operations on them.

I've followed several guides (Including this popular Entagma tutorial: https://youtu.be/SWHxg1jLwTE?si=cWyf-202asmQUuTs&t=667) that do almost exactly what I'm looking to do - but I can't seem to get the same steps to work for me.

For some reason my Rasterize Setup COP is producing nothing once I set its 'Space' Parameter to 'UVs'.


The object is a simple cube for testing purposes - it definitely has UVs, and a 'P' attribute of course.


Here's a very simple .hip file I've put together - hopefully someone can point of whatever it is I'm doing wrong:
Image Not Found


Many thanks for your time 🙏

Attachments:
Screenshot 2024-11-26 112514.png (1.2 MB)
Screenshot 2024-11-26 112641.png (1.2 MB)
copernicus_rasterizeSetup_v001.hiplc (300.7 KB)

 Report
User Avatar
ajz3d
Member
576 posts
Joined: Aug. 2014
Offline
 
In order to make sure that the rasterizer outputs correct P RGB values, pipe in a Null COP, set a display flag to it, and check the Composite View pane (note that Preview Material COP is not supported by the Composite View).

Sometimes Preview Material COP has trouble updating when its inputs are wired/rewired or upstream is modified in some ways. Especially if the change is done to geo input (or internal geo parameter). When this happens, I use a workaround in the form of duplicating the Preview Material node and removing the old one. The new node will be fully cooked, so you're guaranteed to have up-to-date output.

Hopefully this issue will be fixed when COPs eventually come out of the beta stage, because it is somewhat problematic (euphemistically speaking).
Edited by ajz3d - Nov. 26, 2024 07:43:22
 Report
User Avatar
adamwlou
Member
7 posts
Joined: Jan. 2019
Offline
 
ajz3d
In order to make sure that the rasterizer outputs correct P RGB values, pipe in a Null COP, set a display flag to it, and check the Composite View pane (note that Preview Material COP is not supported by the Composite View.

Unfortunately that still doesn't get me anything


Did you give my attached .hip file a go? I'd really appreciate it if you have time 🙏

Attachments:
Screenshot 2024-11-26 131831.png (151.1 KB)

 Report
User Avatar
Tom_SideFx
Staff
38 posts
Joined: Jan. 2024
Offline
 
Image Not Found


Hey, the issue here is that the uvs have values for the z component which means that the shape is not in the right place when projecting to uv space. Setting the z component to 0.0 fixes that issue.

Attachments:
rasterize.hiplc (333.2 KB)

 Report
User Avatar
adamwlou
Member
7 posts
Joined: Jan. 2019
Offline
 
Tom_SideFx
Image Not Found


Hey, the issue here is that the uvs have values for the z component which means that the shape is not in the right place when projecting to uv space. Setting the z component to 0.0 fixes that issue.

Nailed it. Thank you very much 🙏
 Report
User Avatar
ajz3d
Member
576 posts
Joined: Aug. 2014
Offline
 
adamwlou
Did you give my attached .hip file a go? I'd really appreciate it if you have time 🙏
Oh, sorry. I didn't notice the hipfile. Anyway, I'm glad that your issue has been resolved.
 Report
  • Quick Links