3D_NetworkAnalyst was developed to analyse shortest path in the buildings. This program computes all the shortest paths between all entities and records to the geo-database first, and then you can query and visualise the 3D shortest path between two entities.

3D_NetworkAnalyst uses two databases. "Building.MDB" includes the data of building geometry. "Network.MDB" includes the connectivity data of the entities of building (Logical Network).

When the program first runs, shortest paths are not computed and recorded yet. If you click the "Calculate and Record" button, they will be computed between all entities using Dijkstra's Algorithm, and recorded to the database named "Network.MDB" for every entity as different table. So, you can query the shortest path between two entities, and see path, building, and network as 3D.