How to import from 3D visualisation tooles and CAD software via dxf. files.

Q: SketchUp stops working when exporting a large model with SU2Odeon?

A: For large models it can take several hours for SketchUp and SU2Odeon to convert the SketchUp model to one you can open in Odeon. SketchUp will look like it has stopped working showing a "Not responding" message but actually it just means leave me alone i have to work for some time now. So have patience when using SU2Odeon for large models. meanwhile you can watch below video:

Q: Will Odeon support 3D model exchange such as: BIM, IFC, IFCXML etc.?

A: Odeon A/S will probably not incorporate Industrial Foundation Classes (e.g. .ifc or .ifcxml files) in Odeon in the nearest future. However from programs such as AutoDesk Revit it should be possible to export geometries in the DXF format for use in Odeon. If the IFC support is merely export in the IFC file format without a tight integration of data then there is only little advantage of exporting in IFC compared to DXF.

A major problem with the IFC concept is that it assumes that we are linking the calculations up on the same model, whereas we with a model such as Odeon’s tend to alter the geometry during import in order to make the model compatible with the calculation model in Odeon (avoiding small surfaces and having watertight models etc).

Another obstacle is that it is not enough to implement the support in Odeon

- an implementation of the Odeon relevant data should also be available in the other programs (if the architect etc. should be able to define/alter material etc. in the database using their CAD program(s)). And because the data needed by Odeon/CATT/EASE etc. differs because their calculation principles are different there can't be made an implementation common to all such programs. The room acoustics extension to IFC for one program, in this case Odeon, may even alter as the program develops, thus needs other data.

Below is illustrated several ways to handle 3D models for use in Odeon

Q: I want to copy a part of a large complicated CAD file and reuse it inside the same file. what can I do?

A: When you have located the surfaces of the object you want to copy in the OdeonEditor, you copy these surfaces together with all the points to a new editor. Save and load the new room in Odeon. Now to get rid of all the extra points it might be necessary to export the model to DXF and then import it to Odeon Again. This is possible from the file menu.

When this is done you should use the MTranslate function to insert the object back into the room. And use the NumbOffset function to make sure the new copied objects do not interfere with the existing point and surface numbers.

Q: How does Odeon prepare the imported dxf. file?

  • A: Correct for errors which may reside in a CAD model, such as warped or repeated surfaces or surfaces with no area
  • Stitch surfaces together to form models that are easier to handle, looks much nicer, and are better compatible with the calculation principles applied in ODEON
The following technical note covers these issues:  ODEON Import of CAD files in the DXF format – problems and solutions.

Q: Can Odeon use Trimble Sketchup files (.skp) as input?

A: Odeon can do even better. We have created a plug-in SU2Odeon for Trimble Sketchup which converts and saves the geometry directly in Odeon's native .par format (Odeon version 10), it is available for download here. The plug-in is without any additional charge and works with the free as well as the pro version of Trimble Sketchup. For version 9 and earlier of Odeon this solution may work Odeon can not read .skp files, however, it is not a problem to use Trimble Sketchup as room modelling software together with Odeon. The solution is simply to export the model in either .dxf or .3ds format. Odeon is able to directly import these files as exported by Trimble Sketchup Pro - no need for extra software packages.