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Working with IFC models in DIALux evo

DIALux

Over the past weeks and months, we have spoken intensively with planners in order to better understand the challenges and requirements they face in their daily work. Questions about the use of IFC models in DIALux evo have come up time and again.

To make it easier for you to work with IFC files, we have summarised two frequently asked topics that need to be considered for planning.

 

IFC models of other structures (buildings)


We are often asked how IFC models that do not represent classic buildings should be handled. If, for example, bridges, tunnels, steel structures or similar structures are involved, the individual components within the IFC model should be assigned to the IFC site. This assignment can be configured during export in most BIM tools.

Why is this important?

  • These models are processed differently in DIALux evo than buildings.
  • The usual subdivision into buildings and floors is often not given.
  • The method allows you to import any IFC models into DIALux evo without being bound to the strict building structure.
     

Handling insertion points in DIALux evo


Another topic that was asked about during the interviews with the planning offices was how DIALux handles the insertion point of IFC models.
Every IFC model has an insertion point (coordinate system), which is often defined by the terrain coordinate system.
DIALux evo adopts the insertion point of the IFC terrain exactly for its own scene. This makes it possible to later superimpose the exported IFC luminaire model exactly on the building model.

Important notes:

  • Accuracy of the calculation: The insertion point should be as close as possible to the building. If the coordinates of the IFC model are very large (e.g. values greater than 10,000 or 100,000), difficulties arise with rounding, which have a negative effect on the accuracy of the calculation.
  • Automatic adjustment by DIALux: If necessary, DIALux evo moves its own insertion point closer to the building during import with the aim of reducing the coordinates. DIALux remembers the original insertion point in order to ensure that the luminaire coordinates are precisely returned to the IFC model during export.
  • Defined insertion points: Planners often define their own common insertion point in the project, which does not necessarily have to correspond to the IFC terrain coordinate system. Such points are often characterised by small 3D objects, such as a cube. A future function in DIALux evo will allow you to freely position the insertion point at a later date.
     

Further information


This article gives you an overview of the most important aspects of working with IFC models in DIALux evo. For a detailed explanation and further details, visit our knowledgebase, where a comprehensive article with further aspects on this to.