Add massively expanded JavaFX Racing Game (3000+ lines)

[Copilot]

Creates a full-featured single-file JavaFX racing game (RacingGame.java) from scratch in an otherwise empty repository, along with updated README.md documentation.

Planned scope (implementation pending)

Core systems

• RacingGame extends Application — 1400×900 Canvas, AnimationTimer game loop, per-frame key detection
• Vec2 utility class (add, sub, mul, len, dist, norm, dot, perp, fromAngle), NearestResult

Content

• 6 cars (CarDef): Thunderbolt, Phantom, Viper, Blizzard, Inferno, Shadow — each with unique maxSpeed, accel, handling, boostPower, weight, driftFactor
• 3 tracks (TrackDef + Track): Speedway Oval (ellipse), Serpentine Circuit (polar S-curves), Grand Prix Complex (technical polar shape) — each with waypoints, curbs, scenery (80 objects), 12 power-ups, minimap
• 4 weather types: CLEAR, RAIN (200 drops, 15 puddles, 0.65× grip), FOG (0.55α overlay, 0.85× grip), NIGHT (headlight cones, 0.90× grip)
• 6 power-up types: SPEED_BOOST, REPAIR, FUEL, SHIELD, OIL_SLICK, NITRO

Gameplay

• PlayerCar: full physics (drift, boost, fuel, health, shield, spin-out), skid marks (500 max), screen shake, lap detection via signed-side method
• AICar ×3 (Blaze/Turbo/Frost): waypoint following, rubber-banding, corner braking, oil slick avoidance
• Collision system: weight-based knockback, 3 HP damage, shield absorption, spark particles
• Particle system: sparks, smoke, confetti, boost flame, tire smoke
• Championship mode: 3 races, 25/18/15/12 points

UI

• Full menu stack: main → car select (3×2 grid + stat bars) → track select → settings → statistics
• Animated countdown: 3/2/1/GO with color + scale pulse
• HUD: speed, RPM, gear, fuel/health bars, shield indicator, position badge, lap/time/weather/FPS
• GameStats and GameSettings persistent within session

Status

Initial plan committed; RacingGame.java creation was blocked by tooling issues (agent timeout + JSON payload error on large file create). Full implementation requires a follow-up session to write the file in chunks.

Original prompt

Create a massively expanded JavaFX Racing Game in a single file called RacingGame.java at the root of the repository. Also update README.md. The game must be over 3000 lines of well-structured Java code.

IMPORTANT: The file is very large. Write the COMPLETE file in one go. Do not stop partway through.

COMPLETE FEATURE LIST:

Core Application

• RacingGame extends Application, Canvas 1400x900, AnimationTimer game loop
• Key tracking with new-key-this-frame detection, focus handling

Utility Classes

• Vec2 (add, sub, mul, len, dist, norm, dot, perp, fromAngle), NearestResult

6 Selectable Cars (CarDef class)

Each with name, bodyColor, accentColor, maxSpeed, accel, handling, boostPower, weight, driftFactor, description:

1. Thunderbolt - balanced (#ff0055/#ffcc00, speed=22, accel=0.40, handling=0.075, boost=1.8, weight=1.0, drift=1.0)
2. Phantom - top speed (#2200ff/#00ffcc, speed=26, accel=0.32, handling=0.060, boost=1.5, weight=0.8, drift=0.7)
3. Viper - drift king (#00cc44/#ffff00, speed=20, accel=0.50, handling=0.095, boost=1.6, weight=0.9, drift=1.5)
4. Blizzard - heavy tank (#00aaff/#ffffff, speed=19, accel=0.35, handling=0.080, boost=1.4, weight=1.4, drift=0.6)
5. Inferno - boost specialist (#ff6600/#ff0000, speed=24, accel=0.45, handling=0.065, boost=2.5, weight=1.1, drift=1.1)
6. Shadow - stealth drift (#440066/#cc00ff, speed=23, accel=0.42, handling=0.072, boost=1.7, weight=0.85, drift=1.3)

3 Tracks (TrackDef + Track classes)

1. Speedway Oval - simple oval (rx=400, ry=270), red curbs, width=210
2. Serpentine Circuit - S-curves (r=300+sin(a*3)80+cos(a2)*50), yellow curbs, width=180
3. Grand Prix Complex - technical (r=320+sin(a*4)100+cos(a6)*30), blue curbs, width=195
   Each track: waypoint generation, finish line, curbs, tarmac, center dashes, checkered finish, scenery, power-ups, minimap

Weather System (4 types)

• CLEAR: normal conditions
• RAIN: 200 rain drops animated, 15 puddles, grip=0.65x, blue overlay
• FOG: 0.55 alpha gray overlay, grip=0.85x
• NIGHT: 0.75 alpha dark overlay, headlight cones, grip=0.90x

Particle System

• Particle class (x, y, vx, vy, life, size, color, alpha fade)
• Methods: spawnSparks, spawnSmoke, spawnConfetti, spawnBoostFlame, spawnTireSmoke

Floating Text - rises and fades, for power-up feedback and collision text

6 Power-Up Types

SPEED_BOOST (green, +12 speed), REPAIR (red, +35 health), FUEL (orange, +40 fuel), SHIELD (blue, 300 frame protection), OIL_SLICK (brown, 40 frame spin-out), NITRO (magenta, +60 fuel)

• 12 placed per track, bob animation, glow, respawn after 600 frames

Scenery - 80 objects per track: trees, tire barriers, cones, grandstands

Player Car (PlayerCar)

• Physics: accel, brake, reverse, steering with speed factor, drift angle, grip
• Boost (SHIFT), fuel consumption, weather grip, health, shield, spin-out
• Skid marks (500 max), RPM calc, screen shake
• Power-up collection, lap detection (signed side method)
• Rendering: shadow, body, racing stripe, windshield, headlights, tail lights, wheels, boost flame, shield bubble, drift smoke, night headlight cones

3 AI Cars (AICar) - Blaze/Turbo/Frost

• Waypoint following (15 lookahead), variable skill (0.7/0.9/1.1 + difficulty)
• Rubber-banding, corner braking, oil slick avoidance, lap detection, name tags

Collision System

• Player vs AI: knockback by weight, speed reduction, damage (3hp), sparks, screen shake, "CRASH!" text
• AI vs AI: mutual pushback, speed reduction, sparks
• Shield blocks player damage

Statistics (GameStats) - totalRaces, totalWins, bestLapEver, totalDriftDistance, totalCollisions, totalPowerUps, championshipsWon

Settings (GameSettings) - difficulty (Easy/Normal/Hard), weather, lapsPerRace (1-10), showMinimap, showParticles

Championship - 3 races, points 25/18/15/12, standings, champion detection

Countdown - Animated 3/2/1/GO with colors (red/yellow/orange/green), scale pulse, fade

Full Menu System

• Main: Quick Race, Championship, Car Select, Track Select, Settings, Statistics (UP/DOWN + ENTER)
• Car Select: 3x2 grid, car preview, 5 stat bars, description, SELECTED indicator
• Track Select: 3 side-by-side, track shape preview, description
• Settings: difficulty/weather/laps/minimap/particles toggles with < value >
• Statistics: all stats in panel

HUD

• Left panel: car name, speed, RPM, gear, fuel%, health%, grip%, fuel bar, health bar, shield indicator
• Right panel: track name, championship info, position, lap, score, time, best lap, multiplier, combo, weather, difficulty, FPS
• Position badge (gold/silver/bronze), controls bar, drift overlay, low fuel/health warnings

Game States: menu, countdown, playing, paused, finished, championship_results

README.md with full documentation, controls, features, how to run

The following is the prior conversation context from the user's chat exploration (may be truncated):

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