Creating Defined Volume Files [DVF] for LFM Server databases
For clarity, it is often beneficial to limit the pointcloud data presented on screen to the designer.
If a project can be segmented into volumetric areas of interest, or to suit design work packages,
it can allow the user to concentrate fully in the specific area of interest. LFM Server can create
a file which calls the project database [LFD], but puts constraints on the displayed volume.
These files are called Defined Volume Files [DVF].
For example, a database of an Oil Rig could be sectioned into the individual floor volumes. The
user would then have a choice of viewing the Drilling, Production, or Spider Deck in isolation to
the other floors levels. When loaded, the defined volume file will now be used for any processing
that takes place, for example clash detection. If required, other dvf files of different areas can be
loaded (1 per session) or the overall .lfd file can still be accessed for final clash checking.
The procedure for creating dvf files is as follows: 1. Select a volume. This
should contain the whole of the area needed to be saved. 2. Press File>
Save dvf file for current volume. 3. Confirm the volume selection dialogue.
A dvf file of this region will now be in the same directory as the lfd file.
Note: The dvf can be viewed in a text editor and the figures changed if necessary. There will be a
reference to the main lfd file, and also the selected view port corners.
Additional volumes can be manually added to
the dvf in a text editor. (illustration above) The
figures can be extracted from subsequent
volume picking, and copying from the volume
dialogue box. Site drawings often contain
enough information to create these files
without the need to use the creation tool in
LFM Server. Please follow the same format in a text editor.