A user asked for a tool that can set polygon points and connect the points with a linear interpolated line segment.
Motivation: The current Add tool is not so intuitive if the performed segmentation is contour-centered. Also, the Add tool must be paused if the user wants to shift or zoom.
Idea: Look at the current live wire implementation and see whether we can have an abstraction level to exchange underlying cost functions
Short term goal: See whether we can provide a prototype in which the "intelligence" of the live-wire tool is sorted out for the users to test and see if they get what they expect from it. This is useful in this state since it is still not clear what exactly they want/changes over time.