I am Sébastien, a senior student at the EPF in Troyes. I do my internship at LevelS3D to test and validate their flagship application, S3D Cloud, and to follow up the beta-testers of the application. S3D Cloud is a web application, soon available in SaaS mode, which offers the following features:

Supports point clouds of all formats, regardless of the original scanner;

 

3D player allowing measurements and cutting planes in the point clouds;

 

AutoModel, a disruptive feature that automates the most of 3D modeling based on the point clouds.

 

I first tested the AutoModel feature to provide the R&D and Product teams with a first feedback on the feature. I used a point cloud captured in the museum of the Hotel-Dieu-le-Comte, a former medieval hospital in Troyes. I applied AutoModel to this point cloud, then I imported this pre-model into Revit in order to complete the making of the 3D model corresponding to this place. The goal was to test the entire process, from the download of the point cloud in the application, to a finalized, BIM-compatible 3D model.

Several output formats are available. The two I used are IFC and DXF. IFC delivers a 3D object, allowing in particular to work with levels, while the DXF is more like a layer providing different points of view. As in Revit we work with levels, I mainly used IFC.

The initial point cloud is as follows. This is a detailed point cloud from a NavVis mobile laser scanner, which weighs 14 MB.

The following file is the result of the initial point cloud calculation by AutoModel. The processing time was about twenty seconds, and the resulting file only weighs 336 KB.

Finally, this 3D file represents the 3D model, designed with Revit, and based on the result of AutoModel. The manual modeling time was about two hours, and the model IFC file is now 700 KB.

While the modeling process was significantly accelerated by the use of AutoModel, some aspects of it have to be decided by the user. In particular, I had to define:

  • The level zero of the 3D object (defined at ground level),
  • The representation of the round-shaped objects, which for this first version are not taken into account yet,
  • The aggregation of some segments that had been modeled as several distinct sub-segments,
  • And the thickness of the walls.

In total, the solution has two decisive advantages:

  • The time saved: the model was made in only two hours based on the result of AutoModel, while starting from the raw point cloud it would have required several days; indeed, the pre-model AutoModel allows to “hang” the start of a line at a remarkable point as the end, the middle of a segment or the intersection between two segments, which it is not possible to do starting from the point cloud, that does not display segments. So, in addition to the gain in terms of speed, there is also an increase in modeling accuracy.
  • A significantly lighter file: the size of the AutoModel result file is 43 times smaller than the size of the initial point cloud. The pre-model is therefore easier to use, to share, to send, and also allows a more fluid motion when the 3D object is moved in the design software.

S3D Cloud is finally available! If you too, like Sébastien, want to test the application by taking advantage of the free trial period of 7 days and no obligation then register here: Register


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