REDLINE

Real-time multiplayer racer + vehicular combat in the browser. Two modes share the same physics + networking: a procedural racetrack for clean lap-time grinding, and a dedicated 100×100 m skatepark arena for missile-and-meteor mayhem.

What’s in it

• 20 Hz Socket.IO snapshot relay — client-authoritative state, server caches and re-emits to all peers
• Clock-synced interpolation — server returns Date.now() in the ping callback so all clients render the same temporal slice; 80 ms fixed delay with velocity-based extrapolation as fallback
• Race mode — Catmull-Rom centerline → outer/inner walls, sector splits, lap deltas, leaderboard
• Combat arena — central plateau + 4 ramps, NE skate bowl, NW stairs deck, SE big kicker, SW spine, mixed low-poly trees, L-cover walls, healing zone, 2 boost lanes, server-driven meteor shower (~140/min)
• Missile system — homing toward nearest enemy, fire trail with vertex-color additive blending (orange head → black tail), 5-stage explosion (white flash → fireball → ring → smoke → debris with gravity)
• Car destruction — chassis hides on death, 24 debris chunks fly out with velocity inherited from the car, cylinder “wheels” tumble, all synced across clients via combat:carDestroyed
• REDLINE identity — title screen with chromatic-aberration wordmark, synthwave perspective grid, scanlines, scrolling speed lines, GSAP-driven entrance choreography
• Connection status pill — top-right 🟡 CONNECTING… → 🟢 ONLINE · 3P · 142MS with live ping, color-coded by quality