Setting the Bottom Plane of View Range in Floor Plans with looking upwards

[babysatch]

Hi Everybody,

this is my logic in order to create floor planes. You are always looking, going out at the height of the cut plane, downwards or upwards. In the type definition of a floor plane one can set the view direction to up or down.

To my understanding, no matter in which direction you are looking, the view range, view depth and the primary range and all elements belonging to it should always be the same.

My problem is that the field for associating the bottom plane in the view range to a level is grayed out as soon as you look upwards.

Can somebody please explain me the logic of this behavior in Revit?

Thank you all.

11111.jpg

[loboarch · Accepted solution]

It is explained in the view range help topic.

View Range in a Reflected Ceiling Plan (RCP)

Like plan views, reflected ceiling plans also have a view range setting but with some differences.

• A reflected ceiling plan's view direction is up from the cut plane.
• A reflected ceiling plan includes the cut plane as part of the primary range, but it is typically positioned above the cut plane of a plan view. Cut planes in a reflected ceiling plan are often set above the head height of the doors and windows.
• The area between the cut plane and the top of the view range establishes the primary view range of the view. The bottom setting of the view range is not used in a reflected ceiling plan. Elements falling in the primary view range will use the projection line weight.
• View depth is established in the up direction from the cut plane. Elements not in the primary view range but within the view depth will use the <Beyond> line style.

http://help.autodesk.com/view/RVT/2018/ENU/?guid=GUID-58711292-AB78-4C8F-BAA1-0855DDB518BF

So essentially, there is no "top" portion of the primary range when working in a reflected ceiling plan (view range looking up). That zone of the view range only shows families from the casework, window, and generic model categories anyhow. I am not sure how useful that would be in a reflected ceiling plan.