This patch adds a second socket to output the signed angle from edge in addition to the unsigned angle.
When the mesh is concave the angle is -pi to 0, when it is convex, it is the angle from 0 to pi.
The second output was added as calculating a consistent reference angle was more computationally expensive than expected. So if unsigned works for a given task, it can still be used with an added speed benefit.
{F12800335}