I just came across this topic, after trying everything and being sure I must be missing something. It appears I wasnt missing anything and once again Rhino has stumped me with its unique “quirks”.
It seems like a pretty simple and common task: measure or dimension something in Perspective view. The terms “horizontal” and “vertical” just don’t make any sense in the context of 3D space in the way Rhino interprets them. In standard perspective view horizontal refers to the X-axis and vertical to the Y-Axis, and not the Z-Axis as literally everyone would expect. If they were strictly for 2D views, then why have them in the 3D view?
But I guess its all related to the whole Z-is-up-Y-is-depth-only-in-Rhino mess, where suddenly the depth of the world becomes vertical, because 2D is flat like on a table. What was the reasoning behind that again?
Would it really have hurt to add a way to measure something in the Z-axis even while in perspective view? I know there is the distance command, but it doesn’t leave an annotation in the model itself.
Being able to dimension something in 3 dimensions in a 3D viewport in a 3D modelling software surely should be possible and I don’t see any reason why it shouldn’t be!? Maybe because you would have to come up with a third term for the direction that is perpendicular to both “horizontal” and “vertical” to call that dimension style…