JavaScript client for Building Information Modelling, using open standards like IFC, BCF and BIMSie. More info on http://bimvie.ws/
if you do a plain checkout your missing the bimsurfer package (wich is implemented as a git submodule). to utilize this do the following:
$ cd <Path to bimvie.ws>
$ git submodule update
Cloning into 'js/bimsurfer'...
remote: Reusing existing pack: 3329, done.
remote: Total 3329 (delta 0), reused 0 (delta 0)
Receiving objects: 100% (3329/3329), 34.91 MiB | 3.33 MiB/s, done.
Resolving deltas: 100% (1685/1685), done.
Checking connectivity... done
Submodule path 'js/bimsurfer': checked out '636c9f03e7610ace088ca15602400b3f1c638e3b'