The prismatic joint works as expected. But when I inspect the Constraint on the constrained body pair, it is not really clear to me why the respective constrained axis is chosen that way.

If I want to have a prismatic joint where the entity can glide along the y axis, I expected to find a constrained axis on X and Z (with Min: 0, Max: 0) and a constraint on the Y-axis with Min:0, Max: 1).

Instead, I find the X-axis constrained with Min: 0, Max: 1, and the Y and Z axis Constrained with Min:0 Max: 0.

I'm sure I am missing something simple about why these constraints are defined on the other axis then I would have expected, but any help would be appreciated.