Function GraphUpdateScene.InvertSettings

void InvertSettings ()

Inverts all invertable settings for this GUS.

Namely: penalty delta, walkability, tags.

Penalty delta will be changed to negative penalty delta.
setWalkability will be inverted.
setTag will be stored in a private variable, and the new value will be 0. When calling this function again, the saved value will be the new value.

Calling this function an even number of times without changing any settings in between will be identical to no change in settings.