Friday, 16 November 2012

Publish the shared coordinate system

I got my hands on the revit files for the Millenium supermarket. In this Revit architecture files are two links: A MEP file and A structure file.
If I export the file to nwc (navisworks cache file) everything is exactly at the position it is supposed to be. But most of the time every discipline tends to create their own nwc. If you do this for this file you'll get the following result

NWC created from Revit with all the links loaded
NWC created from every discipline separately
Above in blue the entire supermarket selected 
Above in blue only the architectural model from the supermarket selected 
Above in blue the structural + mep model from the supermarket selected

Now how did that happen?
The  structural + mep model are not modelled at the same coordinates as the architectural model. Now this can be fixed. Personally I think this should have been set before modelling. See one of my previous post about shared coordinates: 

Above I have the Architectural model and the structural model open. Notice that the survey points are in different locations. That's why the separate nwc end up on different coordinates in navisworks. If you reconcile the shared coordinate system from the Architectural model to the structural model and the MEP model you can get the separate nwc files onto the right position.

Thursday, 1 November 2012

Revit snaps

Today I want to share a very tiny and simple trick. Have you ever had an autocad drawing under you revit model and you needed to use some of the autocad lines for modelling something.

Ofcourse you start out with turning of unnecessary layers of the dwg. But sometimes you need many of them to stay on. Next you try the pick lines tools and you are tapping like a madmen on the TAB key to try and select the lines. Some Autocad drawings won't let you get the result you want from the pick lines tool. After some tries you might think, okay I'll do it the old fashioned way and I'll trace over the lines myself.
When you start tracing you might notice you seem to only get an intersection snap... ofcourse you know you could press 'se' to force an endpoint snap. You will probably have to do it everytime and that might get tedious.

If you turn all snaps off (i normally tend to have them all on) and some other auto features you will probably see you won't have to use the override command so often.

Don't forget to turn the snap back on when you are done.

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