Connect bool topics - node required?

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Would be an interesting addition for roslaunch, doesn't it? You could create truth-table like connections between topics. Some kind of value mapping could also be achieved by it instead of having to write nodes for each of this purposes. Would reduce some overhead, I'd guess...

The trouble is that this isn't directly a roslaunch proposal, since all roslaunch is doing is passing remapping arguments to the underlying rospy and roscpp libraries. Instead, you'd have to extend the remapping syntax to support arbitrary data modification/remapping.

You're welcome to propose this as a feature request against the ros_comm bug tracker, but I think it is unlikely to go very far.

As an alternative, you could write your subscriber node so that it takes an additional `invert` parameter and uses that to decide whether or not to invert the incoming data. If you need this a lot, you could wrap it up in a class and namespace the invert parameter to node/topic/invert or something.