Class vs Layer

[hgdesign]

When remodeling a house for an addition is it best to define existing and new in different classes or separate into different layers. I was creating a different roof from two gable style dormers combined into one larger gable dormer and everything seems OK. I made the entire roof with new dormer layout in a class 'new roof' and left the existing in a class 'existing roof' and am able to turn off or on to suit.

[joerg]

that's the beauty of VW, do it the way it suits you...

but dont get messed up at the end!! in my practice we use the rule name a layer as "where" the object is and a class as "what" the object is. works pretty well...

happy easter!

[Bob Holtzmann]

Roofs can be on their own level, just as the floors are. The roof layer's elevation can then be set to the lower floor's wall height, making the roof creation process simpler.

Then different roofs can be put on classes for "Roof-Existing", "Roof-Demo", "Roof-New", etc.

It took me awhile to grasp it, but using classes for separating out existing and demolition is the way to go. One reason: the class attributes for demolition can use the dashed line for removal.

[Jonathan Pickup]

as the others have said, layers are where things are, classes are what things are. You can use classes to control graphic style as well as visibility. you can?t do that with layers.

I have written a blog that might help you:

http://archoncad.blogspot.com/2010/03/creating-drawings-for-building-project.html