Companies provide a variety of scanning services. Some of these are used for:
- Recording As-Built Residences
- Reverse Engineering Mines
- Foundation Monitoring
Even GoPro drones are now supported!
Recently I was asked to investigate a set of point clouds using Autodesk Recap 360 Pro (Trial Version). Specifically it’s meshing functionality and how this may be of benefit to someone using Revit.
The trial version of Recap may be found here:
Creating a Project and choose a default save location.
Import point clouds.
Now they need to be registered (aligned with each other). I chose to register them automatically.
A manual registration is also possible if one has the Pro features. As long as three separate planar surfaces, each of different 3D orientation, and as far apart as possible are common to the two scans, then a match should be found: https://www.youtube.com/watch?v=16dO8fCkFkw.
Within recap it is easy to navigate through the point cloud. The view from the scanner itself displays like a 3D panoramic render, and one can also navigate through the point cloud in 3D.
One may then create a mesh object from a selection of the point cloud https://www.youtube.com/watch?v=-bh_B_XfTqs&feature=youtu.be. Drawing a fence around points from various orientations allow one to filter points to create the mesh object from. The size of the object is limited to 30x30x30 meters. The conversion is done in the cloud. OBJ and RCM files can be generated. These may further be processed using Autodesk Remake https://memento.autodesk.com/about or Autodesk Meshmixer (Free) http://www.meshmixer.com/.
If the mesh needs to be inserted into Revit, the Mesh Import from OBJ files Add-In from Truevis might be considered.
Ultimately the mesh object is practically limited to 100×103 facets, and in the case of a house that was scanned, it turns out to be impractical. Here is a low quality mesh that was generated, with a about 3×106 facets.
Here it is reduces to 100×103 facets:
The alternative is to work with the point cloud natively in Revit. Here is some modelling using the point cloud as a reference.