TrafficTest - (modified) Mass Traffic Plugin for UE 5.6

Important

(modified) Traffic Plugin extracted from CitySample. We use this plugin in a project, so I'll try to share as much of 'our' code as possible as some sort of 'giving back to the community'. I hope someone finds it helpful.

Re 5.6 update: ~~I just did the bare minimum and "fixed" the compiler errors and warnings and some runtime asserts (FMassEntityQuery changed quite a bit).~~ ~~I don't claim this to be perfect but "it works". Will revist the upgrade after Epic released the 5.6 City Sample so I can see the errors of my ways.~~ Updated my code with the real 5.6 City Sample.

Thanks to: https://www.youtube.com/watch?v=RRWr_Hnn5Bg https://www.youtube.com/watch?v=otdm3KhM6vs

Added:

• generate ParkingSpot and TrafficLight data from special actors (editor-only) in the current map (discontinued)
• removed RuleProcessor and therefore Houdini import for parking spaces and traffic lights
• upgraded to UE 5.5 codebase
• separate trait to specify size of entity in config
• support for Chaos Vehicle to interact with MassTraffic

Notes:

Minimum car configuration:

1. LODCollector
2. Traffic Vehicle Visualization
3. Traffic Vehicle Volume (new added by me for obstacle processing)
4. Traffic Vehicle Simulation
5. Assorted Fragments
   1. Mass Traffic Random Fraction Fragment
   2. Mass Traffic Vehicle Lights Fragment
   3. Mass Traffic Debug Fragment

Traits

MassLODCollectorTrait
MassTrafficVehicleVisualizationTrait
MassTrafficVehicleSimulationTrait
MassTrafficVehicleDimensionsTrait
MassTrafficVehicleVolumeTrait
MassAssortedFragmentsTrait

Fragments

FTransformFragment
FMassVelocityFragment
FMassForceFragment

Minimum intersection configuration

(no further investigation by me because I need a more "European" approach to traffic lights)

1. LODCollector
2. Traffic Intersection Simulation
3. Traffic Light Visualization
4. Assorted Fragments
   1. Transform Fragment
   2. Mass Traffic Intersection Fragment

Important

• MassTrafficSubsystem::ClearAllTrafficLanes() must be called when MassSpwaner::OnDespawningFinished event is fired

Chaos Vehicle <-> MassTraffic

MassAgent config for Chaos Vehicles to be recognized as obstacles in MassTrafficProcessor still working on the other way round