This folder contains the building 3D models. The models are sorted by building number and floor number.

Each model consists of :

* a model file in IV or AUTOCAD log format.
* a config file (config.ini)
* a geom/ directory
* a visibility/ directory

The geom/ directory contains the list of vertices and faces of the model as well as an info file.
The visibility/ directory contains the list of nodes (nodes.dat) and visible edges and faces for each node (edges.txt).

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FILES STRUCTURE IN GEOM/

geom/vertices: <vertex_id> <x> <y> <z>

geom/faces: <face_id> <vertex_id_1> <vertex_id_2> ... <vertex_id_n> <delimiter $>

geom/info: <centroid_x> <centroid_y> <centroid_z> <diameter>

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FILES STRUCTURE IN VISIBILITY/

visibility/nodes.dat: <node_id> <x> <y> <z> <file_pos> <-1> <node_ids> $$ <node_ids>

* the first list of node IDs is the list of visible neighbor nodes, the second list of node IDs is the list of all
neighbor nodes.

* file_pos is a pointer in file edges.dat to the set of visible edges and faces.

visibility/edges.txt: <node_id> <edge_ids> $$ <face_ids> $$