本文深入探讨了Unity中导航网格（NavMesh）系统的原理及应用。NavMesh是一种数据结构，用于描述游戏世界的可行走表面，并允许从一个可行走位置到另一个位置寻路。通过自动从关卡几何体构建，它帮助创建避免碰撞的角色，使用Off-Mesh链接组件实现导航快捷方式，如跳跃或开门等，同时考虑移动障碍物的影响。
NavMesh (short for Navigation Mesh)is a data structure which describes the walkable surfaces of the game world and allows to find path from one walkable location to another in the game world. The data structure is built, or baked, automatically from your level geometry.
NavMesh Agent component help you to create characters which avoid each other while moving towards their goal. Agents reason about the game world using the NavMesh and they know how to avoid each other as well as moving obstacles.
Off-Mesh Link component allows you to incorporate navigation shortcuts which cannot be represented using a walkable surface. For example, jumping over a ditch or a fence. or opening a door before walking through it, can be all described as Off-mesh links.
NavMesh obstacle component allows you to describe moving obstacles the agents should avoid while navigating the world. Abarrel or a crate controlled by the physics system is a good example of an obstacel. While the obstacle is moving the agents do their best to avoid it, but once the obstacle becomes stationary it will carve a hole in the navmesh so that the agents can change their paths to steer around it, or if the stationary obstacle is blocking the path way, the agents can find a different route.
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