2009

Table Of Contents
3. Clear the Enable check box if you do not require any geometry compression.
4. Select the Coordinates check box if you want to reduce the precision of coordinates.
Enter the value to which you wish coordinates to be precise to in the Precision box. The larger the
value, the less precise coordinates will be and the smaller the .nwd will be.
5. Select the Normals check box to reduce the precision of normals.
6. Select the Colors check box to reduce the precision of colors.
7. Select the Texture Coordinates check box to reduce the precision of texture coordinates.
8. Click OK to set these options or Cancel to exit the dialog without setting them.
NWC Files
Cache files (.nwc) are used when reading native CAD files, such as files from AutoCAD or MicroStation.
By default, when Autodesk NavisWorks Simulate 2009 opens a native CAD file, it first checks in the same
directory whether there is a NavisWorks cache file present with the same name as the CAD file but with a
.nwc extension. If there is, and this cache file is newer than the native CAD file, then NavisWorks will
open this file instead as it has already been converted to NavisWorks format and therefore will open much
quicker. If, however, there is no cache file present, or the cache file is older than the native CAD file, then
NavisWorks will have to open the CAD file and convert it. At this point, it will by default write a cache file
in the same directory and with the same name as the CAD file, but with the .nwc extension, for speeding
up the opening of this file in future.
See File Exporters for more information on why you might want to use the .nwc file exporters, which
CAD applications you can export from and how.
Converting Files
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