Showing posts with label Model Lines. Show all posts
Showing posts with label Model Lines. Show all posts

Monday, June 30, 2008

Display Model parameter

A view property that is often overlooked is Display Model, under the Graphics section. This is useful when you want to quickly turn off the visibility of model elements or set them as halftone/grey scale. This leaves view-specific elements such as detail lines and text visible or easily distinguishable from model elements.

To turn off model visibility in a view, go to the view properties and under Graphics, set the "Display Model" parameter to Do not display. This will turn off visibility of model elements. Keep in mind that tags will disappear since the model elements they belong to are no longer visible. If you use the option As Underlay, model elements will display similar to half toned elements and tags will also stay visible.


I have run into multiple occasions where not all model elements turn off. I filed a Support Request about this a year ago, and it was confirmed to be a bug. If you come across a case like this, please report it and quote SR# 1-2045600292 as a reference. Visibility of elements with overridden line work seems to be respected, but if you hover over their location, they can still be selected, which I don't think is right either.

What I like about this view property is that you can isolate detail lines. If you turn off the visibility of the lines category in V/G, detail lines turn off also, as the line category contains both model and detail lines. So if you have both model or detail lines in a view, you can use this parameter in combination with some other tools to isolate and convert those lines to your liking. See Steve Stafford's post for how to do the conversion.

Some teams like to "draft" their wall sections from scratch rather than using Revit's live wall sections and then embellish them as necessary. There are cases where this might indeed be faster, but I think it all boils down to technique. I don't advocate the former approach, but if you absolutely have to, use a live section view and set the "Display Model" parameter to As Underlay. This way you can at least have some visual reference to see if you're matching up with the model or not. Due to schedule, sometimes this approach might get your drawings done faster as you don't have to wait for all model components to be accurately placed (such as structure, etc.), but please understand that by doing so, you're giving up the true benefits of the BIM approach and will require manual coordination of systems. To make sure it's closer to a BIM work flow as possible, leaving the model as an underlay ensures that the big skeleton and skin of your building conforms with your detailed wall sections.


Share/Save/Bookmark

Friday, March 7, 2008

Switching Detail Lines & Model Lines

So I just read a great tip posted on Steve Stafford's Blog, originally posted on the AUGI forums, and I had to link to it. This ties well into the discussion I posted a while ago regarding the differences between Detail Lines & Model Lines. You never cease to learn!


Share/Save/Bookmark

Sunday, January 13, 2008

Detail and Model lines mayhem

I remember my initial perceptions when I started working in Revit and used to think of Detail lines as Annotation elements, since they are view specific. But Detail lines are in fact used also to represent real Model elements, hence their currently implemented state.

Their line weight is controlled in the same way as modeling objects. You assign a line weight between 1 and 16 to a Line Style and it will print according to the combination of thickness and scale as specified in the Line Weights dialog. The confusing thing for a lot of users is that the same line style used for a Detail line is the same as that used for a Model line. To make it worse, we cannot control the visibility of Detail Lines independently of Model Lines (go the the Visibility/Graphics Dialog to confirm this). And here's another one....the filter tool (the little icon on the options bar) doesn't see a difference either! Yet we all know they're not the same.

So a Detail Line is not a Detail Item and it is representing a part of a model, yet a Model Line is not easy to tell apart from a Detail Line and on top of that, it has no Assembly Code parameter, so is it really a Model object? And for both these unique line objects, we cannot use filters to override their visibility. Sounds like the perfect recipe for disaster.

In essence, there is not much difference between the two: Detail lines are just view specific and Model lines show up everywhere, including 3D views. So how do you tell them apart?

There is a little known parameter in the View Properties dialog called Display Model under the Graphics category. You can select "Normal" (the default), "As underlay" or "Do not display". When you select the "Do not display" option, every model element in a view disappears, or so it seems. Upon closer inspection, you'll notice Detail Lines stay visible. "But Dave, you're confusing me....didn't you say that Detail Lines are controlled by the Lines category in the Model Tab of V/G?! So you're saying they're not Model elements after all?". Well, uhm....hey, I'm just the messenger here!

So if you want to figure out what kind of line you used, set the Model to display "As Underlay" and your Model Lines will be halftoned. Now you can tell Detail Lines and Model Lines apart. This comes in handy when you used the wrong object and want to fix your input. There is really no easy way to turn a Model Line into a Detail Line or vice versa. Keep in mind that by setting the model to not display, you can window-select your Detail Lines easily if you want to delete them. Alternatively, if you mean to keep Detail Lines and delete Model Lines, you can do the same thing but this time, temporarily hide the Detail Lines. Now turn the model visibility to Normal, window-select your objects, visit the filter to make sure you only selected Line objects, and then delete and reset your temporarily hidden objects. Keep in mind that you'll need to use a combination of all these tools to correct your problem, together with a nice dose of patience.


Share/Save/Bookmark