Unity5, configurable Joint:anchor, Connected Anchor, Auto Configure Connected Anchor

Configurable joint is added to the wheel, connected body is the body.

In this case, anchor= (0,0,0) indicates that one end of the wheel joint the anchor point to take Carwheelcenter

Connected anchor= ( -0.699,-0.5,-0.5) indicates that one end of the body joint the anchor point fetch:

carbodycenter+ ( -0.699*d*carbodyxdir) + ( -0.5*d*carbodyydir) + ( -0.5*d*carbodyzdir)

where d is the body Cube side Center distance.

When the auto Configure Connected Anchor is checked, the engine automatically calculates the Connected anchor value as long as the anchor value is given.

For example, in this example, when anchor is taken (0,0,0), the automatically calculated connected anchor value is ( -0.699,-0.5,-0.5).

Why is this value calculated? Because Anchor= (0,0,0) represents the center of the wheel and transforms the center of the wheel into the body coordinate system, it is precisely ( -0.699*d,-0.5*d,-0.5*d) that the anchor coordinate of the wheel center point in the body coordinate system is ( -0.699,-0.5,-0.5).

It is also important to note:

1, to let Gameobject on the added collider can be displayed, you must add Rigidbody.

2, in order to find the body in the candidate list of the wheel connected body, the body must be added rigidbody.

Unity5, configurable Joint:anchor, Connected Anchor, Auto Configure Connected Anchor