Added 2 2D LiDAR Cars

[fnaser]

including xacros, tfs and launch files

[sprinkjm]

Felix, this is cool! But I'm both new to git and also figuring out the changes you're proposing. Can you give me an idea where I can read up? I'm loathe to update the repo during the challenge we are running to avoid confusion for teams if the sensors change for example. Thanks for your interest in the project!!!

[fnaser]

Thanks for your reply. I see, when is the challenge over? You could see all changed files at the top of this page by clicking on "Files changed (12)".

[sprinkjm]

Great; I'll probably work to integrate this as soon as the challenge ends; I'm reticent to do any pulls before then because most of our users are not superusers, and I'm not sure if it will have any effects they might be confused about. :)

[fnaser]

Thanks for the update. Are you working on a kinetic version?

[sprinkjm]

We worked on one briefly, but the updates to gazebo's API mean that the car doesn't move (at least it didn't for us). I am hopeful that I just need to create a new SDF file that uses the right formatting for the new gazebo, because the car looks like it's stuck to the ground. I'm not sure if I need to change the controllers that move the tires, or if the constants I'm using for friction etc. are wrong.

[fnaser]

ok thank you, I also tried briefly, but had the same problem.