OpenTOP 2.5.0

OpenTOP 2.5.0 adds coordinated multi-aircraft trajectory optimization while preserving the existing single-aircraft APIs.

Highlights

• New public MultiAircraft, FlightSpec, MultiAircraftResult, and SeparationConfig APIs.
• Joint fuel-optimal Cruise and Descent optimization in one CasADi Opti problem.
• Default 5 NM / 1,000 ft eighth-order separation approximation, with dense post-solve verification and adaptive refinement.
• Common-altitude horizontal avoidance, ordered waypoint constraints, arrival sequencing, and minimum arrival gaps.
• Performance improvements through independent warm starts, sparse encounter filtering, compact shared transcription, and limited-memory Hessian behavior by default.
• New rendered examples for 2, 3, 4, 6, and 8 aircraft, plus a realistic coordinated-arrival example.
• Updated legacy optimization notebooks for the current OpenTOP and fastmeteo APIs.

Compatibility

Existing CompleteFlight, Cruise, Climb, and Descent workflows remain compatible. Multi-aircraft wind, variable-timestep, time-dependent 4D grid objectives, and unsupported phases are rejected explicitly until their shared timing semantics are implemented.

Contributor

Special thanks to @dus42 for the original multi-aircraft formulation, conflict-region approximation, and experimental implementation that formed the foundation of this feature.

Full changelog: v2.4.0...v2.5.0