DAE file format questions.

Does the DAE file import support triangles, trifans, and tristrips? Is there a sample test DAE that comes with one of the ROS packages that I can use as a reference?

Asked by OpenR2 on 2018-11-15 15:43:15 UTC

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The collada (dae) file format is very complex and is capable of representing models, animations, lighting and kinematics.

I would never attempt to write a dae file by hand, there are plenty of very good open source 3D modeling programs you can use to create them. Blender is one that I use regularly which is free.

Do you have a particular model in mind that you're trying to create?

Asked by PeteBlackerThe3rd on 2018-11-15 16:28:27 UTC

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I am creating a CATIA V5 to DAE converter through CATIA CAA code. I am only looking at getting at translating a tessellated representation of the CATIA geometry and color info. I have a lot of files that I want to convert.

Asked by OpenR2 on 2018-11-15 17:18:49 UTC

DAE looks like it has a mesh element as well as trifans, tristrips, and triangles. I was hoping that RViz and Gazebo would import trifans, tristrips, and triangles and I would get better GFX performance over an STL file with just triangles.

Asked by OpenR2 on 2018-11-15 17:19:27 UTC

I was also hoping that RViz and Gazebo would respect the per vertex normal on those primitives for smooth shading as opposed to calculating a per face normal.

Any insight?

Asked by OpenR2 on 2018-11-15 17:19:50 UTC

Both Gazebo and RVIZ use the open source Ogre3D rendering engine underneath, so you're probably better off asking in their support forums. Not that we don't want to help, but most of the expertise with this low level rendering will be there.

Asked by PeteBlackerThe3rd on 2018-11-15 17:25:52 UTC

OK. Rendering questions to the orge folks. Do you know off hand about mesh? The mesh is used for collisions?

Asked by OpenR2 on 2018-11-15 18:16:31 UTC