improve support to reload/switch models through urdf - #1867
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as described in the comment, this can happen when multiple models are loaded interleaved. There is no harm in re-using the material objects here, as they do not change.
As it might have changed. This change enables a global reset trigger to update the display after a new robot description was uploaded. Note that the same effect could already be achieved by disabling and re-enabling the individual display by hand, which is more cumbersome though.
purely for convenience.
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I was working with a use-case recently where the
/robot_descriptionparameter was changed regularly, leading to