Tutorials

IFC Import to Pathfinder (and PyroSim)

November 14, 2018
The next releases of Pathfinder and PyroSim will include the capability to import Industry Foundation Classes (IFC) files that describe building data. In Pathfinder, this can significantly speed model creation since it includes automatic extraction of  floors, doors, and stairs. This post demonstrates this feature.  Read More...

Manually Coupling FDS and Pathfinder to Respond to Smoke

November 7, 2018
A long-term development goal has been to fully couple the PyroSim/FDS fire results with Pathfinder evacuation. A first step toward this goal is the capability to display both fire and evacuation results in the same results viewer. However, full coupling of the two simulations has not been completed. In the interim, it is possible to run the fire simulation, monitor the reduced visibility due to smoke, and then manually use that information to slow and re-direct occupants in response to the fire. This provides an example.  Read More...

VR in Pathfinder and PyroSim

October 17, 2018
The next releases of Pathfinder and PyroSim will include the capability to display results using the Oculus Rift virtual reality (VR) headset. This post gives a preview of how to use this capability.  Read More...

Ramps in Pathfinder

August 10, 2018
This post demonstrates how to use straight and curved ramps in Pathfinder. Straight ramps are supported using the Create Ramp tool, while curved ramps require CAD import and use of the Extract Floor tool.  Read More...

Monte Carlo Simulations in Pathfinder

June 20, 2018
Pathfinder 2018.3 will include basic monte carlo simulation tools to automate multiple simulations where the initial positions and properties of occupants are randomized. This post demonstrates this capability. Read More...

Group Movement in Pathfinder

March 19, 2018
In Pathfinder 2018.1, occupants can be assigned to groups that move together during the simulation. In this post, we illustrate a few use cases. Read More...

Display Experimental Trajectory Data in Pathfinder Results Viewer

February 16, 2018
This post demonstrates an undocumented feature in Pathfinder for visualizing experimental trajectory data in the Result Viewer. Read More...

Coupling PyroSim Fire Results with Pathfinder Movement

February 14, 2018
We have begun coupling PyroSim fire results with Pathfinder movement. The first major task was to create a Results Viewer that could merge and display PyroSim and Pathfinder results simultaneously. That has largely been completed. We have also completed limited capability to calculate the Fractional Effective Dose (FED) as occupants move through changing CO, CO2, and O2 concentrations. Future development will use PyroSim results to alter occupant movement and decision making within the Pathfinder simulation. In this post, we demonstrate the capability currently available in Pathfinder 2018.1 and PyroSim 2017.2. See the post Manually Coupling FDS and Pathfinder to Respond to Smoke for instructions on how to link fire simulation output with evacuation simulation movement  Read More...

Pathfinder at People Movement and Management Show

July 31, 2017
In July of 2017, Thunderhead participated in the People Movement and Management Show held in Derby, UK. Our goal was to introduce Pathfinder to the people movement audience. Pathfinder was originally developed for emergency evacuation simulation as a companion product to PyroSim, our fire simulator. But we are adding features that will make it possible ... Read More...

Subway Station Passenger Movement using Pathfinder

March 27, 2017
This post demonstrates how to use Pathfinder to simulate movement in a subway station, with trains arriving and departing from the station. A growing list of features not specific to evacuation, such as occupant sources and assisted evacuation, make Pathfinder applicable to a much broader range of pedestrian movement problems. Read More...