... what I don't understand is why the 3rd edge (in sequence along the Z-axis of the workplane) was chosen instead of the one on the actual workplane? The chosen edge is directly behind (obscured by) the edge I selected, on a workplane that's not even parallel to the one I selected.
I had a hunch... but it was wrong. So I experimented with another hunch.
Seems that-- if working in a 2D View, which is what you will be in if having executed the "View by Workplane" Command-- the Middle-Point-Snap will Snap to the nearest-middle-point
any of the possible object candidates. The Middle-Point Snap will occur at that middle-point which is nearest the Snap Aperture
, of any of the possible entities.
This is true for SEKE-Snaps, as well as Running and Local Snaps. Also true for whether or not we have "In Aperture Only" checked
or not in Snap Settings; though, with this option checked, we still have to have the middle-point in the Snap Aperture for the snap to execute.
This is a good example of why I advocate using Running or Local Snaps sometimes, always with "Show Magnetic Point" option on