- Yen's algorithm in Rust: finds up to 3 distinct shortest routes by
iteratively deviating from previously found paths with node exclusions
- Routes are deduplicated by station sequence (same stations = same route
even if timing differs slightly)
- Dijkstra refactored to support node exclusion sets for Yen's spur paths
- WASM API returns JSON array of RouteResult (was single object)
- Frontend routing store holds multiple routes with selectedRouteIndex
- Route tabs: "Fastest", "Alternative 1", "Alternative 2" with distinct
colors (orange, blue, purple), click to switch and resample trajectory
- Compact route planner layout: 2-column From/To, shorter window buttons
- Tested: Earth L1 → Jupiter L1 finds 2-leg relay via Mercury L1 (6.9mo)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- CLAUDE.md: build commands, architecture overview, coordinate systems,
WASM rebuild instructions for future development sessions
- Switch from adapter-auto to adapter-static with SPA fallback
(outputs to build/ directory for nginx serving)
- Install @sveltejs/adapter-static dependency
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Blue octahedron station markers with additive glow sprites in 3D scene
- Orange trajectory line showing actual Lambert transfer orbit in 3D
- Green animated package sphere with glow following the trajectory
- Package POV camera: first-person view from the package looking forward
along the trajectory (toggle button appears when route is computed)
- Station positions update every frame synchronized with 2D view
- Route animation shared between 2D and 3D views via routing store
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Trajectory sampling: propagate Lambert transfer orbits using universal
variable Kepler propagation, sample 60 points per leg
- Smooth curved trajectory lines on 2D canvas (real orbital arcs, not
straight lines)
- Animated green package dot with radial glow traveling along trajectory
- Route progress slider (0-100%) with play/pause animation toggle
- Auto-animating ~20-second cycle through the full route
- WASM API: sample_route_trajectory() with per-leg NaN separators
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Lambert's problem solver using universal variable method with bisection
(handles elliptic, parabolic, hyperbolic transfers + anti-podal cases)
- Transfer matrix: precompute pairwise station transfers over time window
using Lambert solver with configurable launch velocity
- Dijkstra routing on time-expanded graph (station × week nodes, transfer
+ wait edges) to find minimum-time routes
- Route Planner UI: from/to station dropdowns, search window selector
(1-10 years), "Find Optimal Route" button with results card
- Route visualization: orange dashed trajectory lines with arrow heads
and leg numbers on the 2D canvas
- Tested: Mercury L1 → Jupiter L1 computes 6-month direct transfer at
30 km/s — physically reasonable
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Lagrange point computation (L1-L5) for any Sun-planet pair in Rust
- Station generation: auto-place at Lagrange points by priority (inner → outer planets)
- Station panel UI: count slider (5-50), launch velocity slider (5-100 km/s) with info tooltip
- Blue diamond markers on 2D canvas with labels when zoomed in
- Active station list in sidebar (Earth L1, Mars L2, Jupiter L4, etc.)
- WASM API: generate_stations(), get_station_positions(), get_station_names()
- Station positions update every frame (co-rotating with planets at Lagrange points)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- 3D scene: Threlte/Three.js with starfield, orbit lines, planet meshes,
sun glow, OrbitControls (orbit/zoom/pan), point lighting
- 2D velocity tails: gradient lines showing planet velocity direction/magnitude
- New WASM API: get_body_velocities_at_epoch(), get_orbit_points()
- Orbit ellipses computed in Rust, rendered in both 2D and 3D views
- Ecliptic-to-Three.js coordinate mapping (Y-up convention)
- View toggle now switches between working 2D and 3D renderers
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Rust workspace with 4 crates: orbital-mechanics, mass-driver-core, mass-driver-wasm, mass-driver-backend
- Keplerian orbital mechanics engine with JPL elements for 14 bodies (Sun, 8 planets, Pluto, Ceres, Europa, Titan, Ganymede)
- Kepler equation solver and orbital position computation compiled to WASM
- SvelteKit frontend with Tailwind CSS, Canvas2D renderer showing animated solar system
- Orbit ellipses, planet dots with labels, Sun glow, grid, scale bar, pan/zoom controls
- Time controls (play/pause, 5 speed levels, date picker) driving live simulation
- 2D/3D view toggle (3D placeholder for Threlte integration)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
