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COLLADA from Sketchup is wrong colors

asked 2012-06-19 07:34:42 -0500

mrath gravatar image

updated 2012-06-25 05:34:12 -0500

I've update a robot description that previously used STL files (created from Solidworks) to use COLLADA files. Everything worked fine before, just wanted to make it prettier - i.e. add colors to the model.

I imported the STLs into SketchUp 8 using some plugin, and that went well. Upon adding correct colors, I exported to COLLADA using Sketchups builtin exporter. This is a screenshot of SketchUp with the correct colors:

neobotix platform SketchUp

Problem is that the COLLADA file comes up with wrong colors in Rviz:

neobotix platform Rviz

I have tested the following:

  • Use in model (Rviz) - Colors look too dark (see screenshot)
  • Open in Meshlab - No colors
  • Open in Preview.app on OSX - Colors look good

Please advice, and thank you in advance!

COLLADA file

SketchUp file

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can you attach the COLLADA file that produces wrong color?

Kei Okada gravatar image Kei Okada  ( 2012-06-20 19:37:26 -0500 )edit

Updated with attachments, kinda.

mrath gravatar image mrath  ( 2012-06-25 05:35:01 -0500 )edit

I'm not sure, but does rviz use the colors or only works with textures?

dornhege gravatar image dornhege  ( 2012-06-25 06:03:52 -0500 )edit

I actually don't know. I just tried putting textures instead of color on some of the faces in sketchup, then re-exporting. It looks different, but not better, and textures does not show up in Rviz.

mrath gravatar image mrath  ( 2012-06-25 07:30:26 -0500 )edit

I'm sure textures work, because I have used that.

dornhege gravatar image dornhege  ( 2012-06-25 08:14:01 -0500 )edit

From SketchUp as well, I presume? I guess I can make some textures which are just one plain color. Seems like an unnecessary hack though.

mrath gravatar image mrath  ( 2012-06-25 09:30:13 -0500 )edit

texture is not supported in collada_parser. I'll try if we can fix. BTW how did you visualize your model? I'm using [http://www.ros.org/wiki/collada_urdf/Tutorials/Working%20Directly%20with%20COLLADA] but it shows URDF failed model parse

Kei Okada gravatar image Kei Okada  ( 2012-06-25 16:00:13 -0500 )edit

I am pushing the robot URDF to the parameter server and visualizing in Rviz. The COLLADA files are just for visuals.

mrath gravatar image mrath  ( 2012-08-07 06:47:32 -0500 )edit

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answered 2014-08-04 03:49:24 -0500

mrath gravatar image

Problem fixed when upgrading from Fuerte to Hydro.

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Asked: 2012-06-19 07:34:42 -0500

Seen: 637 times

Last updated: Aug 04 '14