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Monday, April 5, 2010

Navisworks/AutoCAD Architecture & MEP Object Enabler and Proxigraphics Information/Tutorial

We occasionally get tech support calls from subcontractors and GCs about bringing in DWG files into Navisworks where they have issues viewing the 3D models that came from AutoCAD MEP. Below are some explanations and a tutorial on how to make life easier for the Navisworks users and for those not using older versions of Autodesk products.

>http://images.autodesk.com/adsk/files/autocad_architecture_mep_2011_oe_readme.html

The AutoCAD Architecture-MEP 2011 Object Enabler makes AEC objects come to life in 2011 releases of AutoCAD, AutoCAD Electrical, AutoCAD Mechanical, AutoCAD Map 3D, AutoCAD Civil 3D, Autodesk 3ds Max, Autodesk 3ds Max Design, Autodesk Navisworks Manage, and Autodesk Navisworks Simulate. For earlier versions of these products, VIZ, and AutoCAD Mechanical Desktop please refer to www.autodesk.com\enablers for the correct version to download. This new release leverages ObjectDBX technology allowing object data created in AutoCAD Architecture or AutoCAD MEP to be accessed outside the AutoCAD Architecture and AutoCAD MEP environments.

The AutoCAD Architecture-MEP Object Enabler provides an advanced level of compatibility for users of AutoCAD 2011-based applications to share files with AEC objects. The object enabler "wakes up" the AEC objects enabling full use of the AutoCAD environment with support for AutoCAD Architecture and AutoCAD MEP’s multiple display representations. With the AutoCAD Architecture-MEP Object Enabler installed you can load any file created with AutoCAD Architecture or AutoCAD MEP into many AutoCAD-based applications and see exactly the same object display as in AutoCAD Architecture or AutoCAD MEP.

Use of the AutoCAD Architecture-MEP Object Enabler can reduce or eliminate the need to store proxy graphics. File sizes are smaller, and drawing compatibility is improved. For example, an AutoCAD 2011 user can load an AutoCAD Architecture or AutoCAD MEP drawing and experience exactly the same behavior of objects using object snaps or many of the standard AutoCAD commands such as MOVE, COPY or ROTATE. Installing the AutoCAD Architecture-MEP Object Enabler will not significantly impact the performance of the host program and will only be accessed when drawings containing AEC objects are opened.

AutoCAD Architecture and AutoCAD MEP use object technology to represent walls, doors, windows, ducts, pipes, and other AEC objects. These objects are stored in your drawing (DWG) files and to access them, you must run AutoCAD Architecture, AutoCAD MEP, or an equivalent ObjectARX application capable of reading AEC objects.

Proxy graphics provide an alternative means to display objects using simple graphical representations. Objects represented as proxy graphics lack the full "intelligence" of true objects. You cannot copy a proxy object, nor can you reposition a door within a wall when these objects are represented by proxy graphics.

Note: If you are sharing files with AutoCAD users, a better alternative to proxy graphics is to have the AutoCAD users install the appropriate object enabler.

To share AutoCAD Architecture or AutoCAD MEP drawings using proxy graphics successfully, it is important to understand the multiple display representations of AEC objects and how they are stored as proxy graphics. Each object can store a single proxy representation. Therefore it is important to configure your work session to be sure the file you are saving displays correctly in the shared application. For example, a door can be displayed using a model, plan, or reflected ceiling representation and proxy graphics for a door can only be saved as one of several display representations.



What do you want to do?

* Save drawings with proxy graphics
* Configure AutoCAD to display proxy graphics
* AutoCAD Architecture and AutoCAD MEP Performance Tips

Save drawings with proxy graphics
1. At the command line, type PROXYGRAPHICS and press ENTER.
2. Type 1 and press ENTER to set the variable to true. This is a drawing-based setting, so it needs to be done one time in each drawing.
3. At the command line, type ISAVEPERCENT and press ENTER.
4. Type 0 and press ENTER to set the value to zero percent. This is a registry-based setting, so it only needs to be set once.
5. Save your drawing with the active viewport set to display the graphics to be saved as proxy graphics.

Note: ISAVEPERCENT must be set to zero to enable consistent control of the graphical representations being saved with proxy graphics. Failure to set this value to zero can result in mixed graphical representations saved as proxy graphics. See also AutoCAD Architecture and AutoCAD MEP Performance Tips.
Configure AutoCAD to display proxy graphics
1. At the command line, type OPTIONS and press ENTER.
2. Click the Open and Save tab.
3. In the Proxy images for custom objects dropdown, select Show proxy graphics.
4. Click OK.
AutoCAD Architecture and AutoCAD MEP Performance Tips

AutoCAD Architecture and AutoCAD MEP leverage ObjectARX object technology and how to optimize your system depends on how you use AEC objects. If you are working exclusively with AutoCAD Architecture or AutoCAD MEP, or a combination of AutoCAD Architecture, AutoCAD MEP and adjacent seats of AutoCAD 2011 equipped with the AutoCAD Architecture-MEP 2011 Object Enabler, you can significantly decrease file size and improve file performance by eliminating the storage of proxy graphics.

AEC objects are relatively complex compared with traditional AutoCAD objects such as lines, arcs, and text. For example, a stair object can have hundreds of graphical primitives used in its display. Consequently object snap settings need to be set in a manner that is consistent with your performance requirements. Turning on numerous running object snap options can significantly hinder object snap performance when moving the cursor in the vicinity of stairs. This can be managed by setting and changing the AutoCAD object snap options.

What do you want to do?

* Configure AutoCAD Architecture and AutoCAD MEP to disable proxy graphics during file save
* Install the AutoCAD Architecture-MEP Object Enabler on adjacent AutoCAD seats
Disable proxy graphics during file save
1. At the command line, type PROXYGRAPHICS and press ENTER.
2. Type 0 and press ENTER to set the variable to false.
3. At the command line, type ISAVEPERCENT and press ENTER.
4. Type 50 and press ENTER to set the variable to fifty percent, which is the default AutoCAD value.

Note: ISAVEPERCENT must be set to zero if proxy graphics are enabled. If proxy graphics are disabled, ISAVEPERCENT can be set to any value from 0 to 100."

Read the entire help file at AutoCAD Architecture-MEP 2011 Object Enabler Readme

1 comments:

Rich June 3, 2010 at 1:30 PM  

Wow awesome job! You leave no points unanswered about the topic. Very well explained and should be easy for anyone to understand. I work with the McGraw Hill Sweets Network, where you can find a great selection of autocad drawings, for all construction needs.

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