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Mesh Scale Huge for .stl file

asked 2015-03-19 15:10:07 -0500

adam896 gravatar image

Hello, having a problem where the meshes which i'm importing to my URDF file are absolutely huge. The dimensions are correct in solidworks (around 400mm cube). I tried changing the units of the part back to meters as i was working in mm and this had no effect. Any idea what i'm doing wrong?

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It would help if you're able to share your STL and URDF files. You can just update the question.

chapulina gravatar imagechapulina ( 2015-03-19 15:26:27 -0500 )edit
1

I dont really know what was causing this, maybe the fact that the solidworks model was developed in mm rather than m, i ended up just using a scaling tag and setting the three parameters to 0.001 and it imported fine

adam896 gravatar imageadam896 ( 2015-03-23 11:55:09 -0500 )edit

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answered 2015-03-23 12:16:42 -0500

chapulina gravatar image

It seems that there isn't a way to specify units in STL files. So whatever unit you use will be treated as meters by Gazebo. That's why your 400 mm cube came out as a 400 m cube.

Your solution seems to be the easiest one, to specify a scaling factor for the mesh on SDF, from mm to m for example:

<mesh>
  <uri>model://model_name/meshes/your_mesh.stl</uri>
  <scale>0.001 0.001 0.001</scale>
</mesh>

An alternative would be to rescale the mesh with an external editor.

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Asked: 2015-03-19 15:10:07 -0500

Seen: 3,977 times

Last updated: Mar 23 '15