Some time ago I recall some class/tutorial notes regarding the way SPB tools utilize these two subclasses with respect to component placement and constraints definitions as well as interpretation by the 3D viewer. I can't seem to locate those notes now.
I have always used place_bound shapes to represent actual component body dimensions and to create a crude 3D model for visualization of boards with components. With recent upgrade to 16.6, the footprint viewer (within CIS) does not properly interpret my footprints with the 3D heights.
I have noticed that in EMA supplied footprints, many also have dfa_bound shapes defined with height properties. Those footprints appear to reflect an appropriate 3D perspective in the CIS viewer.
Do I need to update all my symbol libraries to include both subclasses and/or why?
Oh - I've also noticed that the 3D viewer within symbol editor is still broken (since v16.3) with respect to inverting the Z-axis display of height information. The positive height properties are displayed downward through the board level padstacks as opposed to top-up. Anyone know of plans to "fix" that some day?
Any tutorial guidance is appreciated!