Hello,
I am trying to set different friction coefficients in the different x-y link direction. For that i am using the ` , and ` tags provided especially for that purpose. But for some reason the friction coefficients are applied by GAZEBO in the world frame and not the link frame.
In order to test the issue I placed same box, with different `` and `` on the ground plane in two orientation (perpendicular to each other) and applied increasing gravity in x direction.
Here is the sdf of the ground plane **(i use same friction in both directions)** :
true 0 0 1 100 100 100 100 1 0 0 false 0 0 1 100 100
Here is the sdf of a box that i use for tests **(i set high friction in x direction, and low friction in y direction)** :
false 0 0 0.5 0 0 0 2 1 1 0.3 100 1 0 0 0 0 -0.4 0 -0 0 50 1 0 0 1 0 1 2 1 1
As i increase the gravity in x (world) direction both boxes start to slide simultaneously and with the same speed. if i increase the gravity in y (world) direction the boxes do not move.

What am i doing wrong here ?
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