要求用 Three.js 开发赛车游戏：车辆物理、可改装赛车、多条赛道、AI 对手与分屏多人模式。
使用 Three.js 和 JavaScript 创建一款激动人心的 3D 赛车游戏。实现具备悬挂系统、轮胎摩擦力和空气动力学效果的真实车辆物理系统。创建细节丰富的赛车模型，并支持自定义涂装与性能升级。设计多条赛道，每条赛道具备不同地形与障碍物。添加具备不同难度等级与竞速行为的 AI 对手。实现本地分屏多人模式。包含功能完备的平视显示器（HUD），实时显示车速、单圈用时、当前名次与迷你地图。创建粒子特效，用于表现轮胎烟雾、引擎效果与天气效果。添加动态昼夜循环系统，并配合逼真的光照效果。实现多种比赛模式，包括计时赛、锦标赛与淘汰赛。包含回放系统，并支持多角度摄像机视角。
Create an exciting 3D racing game using Three.js and JavaScript. Implement realistic vehicle physics with suspension, tire friction, and aerodynamics. Create detailed car models with customizable paint and upgrades. Design multiple race tracks with varying terrain and obstacles. Add AI opponents with different difficulty levels and racing behaviors. Implement a split-screen multiplayer mode for local racing. Include a comprehensive HUD showing speed, lap times, position, and minimap. Create particle effects for tire smoke, engine effects, and weather. Add dynamic day/night cycle with realistic lighting. Implement race modes including time trial, championship, and elimination. Include replay system with multiple camera angles.