How to create custom models and include that in .world file ?

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Hi,

one procedure to create custom Gazebo models is the following:

1. create the dae file of the model. For this there are several ways. One way is to use sketchup to find a model of the object you need, then download it, adapt it a little bit with blender, and save it.
2. Once you have the proper dae file for your model, you need to create a series of files that define the model. You need to create the model.conf, the model.sdf and the meshes directory where to put your dae file.
3. Then you have to place those files in the ~/.gazebo/models directory in order to be able to use it in an sdf .world file.
4. Final step is to include the model in your world file

Because all that is a little confusing, we created a video showing how to do all the process. You can find the video here: https://www.youtube.com/watch?v=aP4sD...