Forums Houdini Indie and Apprentice Hi, I have a question about UV of Houdini.

Hi, I have a question about UV of Houdini.

   2049   6   0
User Avatar
vfx_yFan
Member
45 posts
Joined: Feb. 2017
Offline
 
Hi, I have a question about UV of Houdini. I stored vector properties into UV and found that Z value of UV was not exported and could not be read in visualization.
The appended drawings:
Edited by chrism - July 30, 2019 12:00:42

Attachments:
v4.png (3.5 MB)
v1.png (361.3 KB)
v2.png (135.7 KB)
v3.png (86.4 KB)
uv_test.hip (75.4 KB)

 Report
User Avatar
jsmack
Member
8034 posts
Joined: Sept. 2011
Offline
 
FBX is a Maya thing, which doesn't use 3 channel UV maps. They get converted to 2 channel on export. Color sets can be used to export arbitrary 3 channel vector data instead.
 Report
User Avatar
vfx_yFan
Member
45 posts
Joined: Feb. 2017
Offline
 
jsmack
FBX is a Maya thing, which doesn't use 3 channel UV maps. They get converted to 2 channel on export. Color sets can be used to export arbitrary 3 channel vector data instead.
Thanks for your answer, but I stored the vector property in the color property, and finally found that the value of the color cannot be less than 0 or greater than 1 when exporting.I don't know what other properties on the vertices of the model can store vector properties.
 Report
User Avatar
jsmack
Member
8034 posts
Joined: Sept. 2011
Offline
 
I don't think the export limits the range of color properties, unless the FBX spec itself limits it. Otherwise it should allow for raw 32bit floats.

Is it possible to avoid the FBX format? It really is one of the worst.
 Report
User Avatar
EricSheng
Member
159 posts
Joined: Feb. 2018
Offline
 
you can use Houdini Engine to export the mesh directly to Unity, which supports up to 4 channels per uv.
 Report
User Avatar
vfx_yFan
Member
45 posts
Joined: Feb. 2017
Offline
 
EricSheng
you can use Houdini Engine to export the mesh directly to Unity, which supports up to 4 channels per uv.
Thank you very much. That's a good idea.I tested this method, which can store four values, and was very satisfied
 Report
User Avatar
vfx_yFan
Member
45 posts
Joined: Feb. 2017
Offline
 
jsmack
I don't think the export limits the range of color properties, unless the FBX spec itself limits it. Otherwise it should allow for raw 32bit floats.

Is it possible to avoid the FBX format? It really is one of the worst.
Yes, maybe it's the FBX format that limits the output. The above method solved my problem and I ended up importing the model into Unity.
Edited by vfx_yFan - July 29, 2019 21:53:04
 Report
  • Quick Links