Thursday, 19 December 2013

Revit origin

Recently I was asked how can you tell if someone has been playing around with the project base point and survey point.

If you have a good template your survey point and project base point resides on the revit origin. It's good to know that you can adjust the survey point and the project base point but the Revit origin is fixed.

The first indication that the survey point and the project base point have been moved is of course that they are not at the same position any more. The second one is: select the project basepoint. If it has values other that all zeroes it has been moved. 

To check files you may use this old trick to find certain points. Draw a tiny drawing in Autocad. I like an X with a circle on the Autocad origin. Save the file and link the drawing in Revit with these settings.
Auto origin to origin.
The image below shows two projects side by side:
In project two I have moved (the left one) the survey point and the project base point unclipped. Next I have imported an autocad drawing origin to origin. Notice where it shows up. So if the autocad drawing does not land on top of the project basepoint or surveypoint than they have been moved. 

In the project shown on the right I have moved the survey point and project base point in a clipped state. When you do this you see that if I link in the same dwg as before it lands on top of the project base point.

http://help.autodesk.com/view/RVT/2014/ENU/?guid=GUID-0625D4E1-4EE9-4848-8B44-73A75D1896DB 
Says:
Moving a clipped project base point is the same as using the Relocate Project tool. See Relocating a Project.
  • Project coordinates do not change for the model elements.
  • Shared coordinates change for the model elements.
The helpfile explains it quiet well. Since I am more a visual person I am going to take the files to Navisworks.

Project 1 (image below) The survey point and project base point are both on top of the revit origin. The dwg file has also been loaded into this naviswork file. Since nothing has been moved everything is where you expect it to be.
Project 2 (image below) The project basepoint and survey point have been moved. Notice how navisworks places the survey point on top of the autocad file.
Project 3 (image below) The project basepoint has been moved. It seems to have the same result as project 2 but, the big advantage is that when revit files do not share coordinates you can always link them origin to origin. 
Another advantage is that if those revit files are not linked you can enter the coordinates of the project base point in Navisworks and everything ends up where they are supposed to be. See image below. 
(Or you can enter the project basepoint coordinates form one revit file into the other one. That is what the publish and reconcile command does as well)

Personally I prefer the setup of project 3 it facilitates automatic feature and fix it yourself if things go pear shaped.
  





Wednesday, 4 December 2013

Navisworks 2014 selection tree

A small tip today about something I ran into.

Perhaps you have noticed that when you select a selection set or search set in Navisworks 2014 your selection tree switches to the selection set thingy. (it used to be a tab but now they have changed the interface and you can't really call it a tab)

See image: In this image you see me selecting a searchset and the selection tree switches to show which search set I have selected..... WHY?????
Personally I would like to see the standard tab from the selection tree when I select a searchset.
Fortunately you can adjust this behaviour. Go to the application menu -> click on the options button while holding the shift key on your keyboard. This will open the hidden Navisworks options.
Go to: Interface > selection tree > remove the tickmark by tab_on_current_selection

Restart Navisworks

something compleetly else and not relevant
These hidden options from Navisworks make me want to start searching for these hidden autocad snap settings that some drafters have seem to be able to activate. :)




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