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From: 2byts
this is awesome! Thanx a lot for the share.
I was doing something similar for UV layout into UDIMs based on materials
From: pior (PIOR_O)
Hello Paq,
Would you mind sharing one of these models (let's say, something of medium complexity), with and without your fix applied ? I'd be very curious to see what it takes to get to the same result in Blender, and would love to try it out.
From: PaQ
Hi Prior,
Sure, sorry for the delay, I missed the notification.
In the meantime here's an updated version, using a lame brute force approach to reduce the stretching ... it seems to work better than the one made with my bad trigonometry / vector skills.
Does is works better than tagging / unwarp edge using existing MoI uv's boundaries ?
Short reply : NO
Long reply :
1) I'm facing a lot of Hou crash whit the Flatten method ... as I'm only manipulate existing data here, the 'tool' is quite robust.
2) 90% of the uv's coming from MoI are actually good, except they are stretched in u or v direction. They are also perfectly grid aligned : torus shape or tubes output a 'perfect' aligned rectangle, helping the packing process to maximize uv space.
Ultimately I could add a last check that will re-flatten the island that are still too distorted (easy), but I will only do it once I resolve the uv-flatten crash on some of those surfaces.
Image Attachments:
CaduvFIX2.JPG
From: PaQ
Hello, here's an updated version, using the last feature from Moi5 Beta to generate proper surface ID.
That's about the third time I rebuild this tool, the execution time is almost instant, and there is no more iteration to "find" the best value.
Create the layout / udim however can still take a few second / minutes depending of the number of surfaces (using native Hou UVLayout).
https://www.youtube.com/watch?v=XbGfRWSs-uw
Build on Houdini 20.0.547
Attachments:
sop_qwak.CADuvFIX_MoI5.1.0.hdalc
From: Frenchy Pilou (PILOU)
Cool!
From: Grendel
PaQ, would this work with Houdini Apprentice?
From: PaQ
It should yes, however the geo output options are quite limited (ROP operators are disabled IIRC). You can only export geo by right click on a node and select export geo ... and in the case of apprentice only .obj works, and I'm not 100% sure uv's are preserved. But I haven't used apprentice since a while !
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