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代码：

for(const e of world.querySelectorAll('*')){
    if(e.id==='车'){
        e.collides = true
        e.onEntityContact(({other})=>{
            if(!other.isPlayer)return
            other.mesh = e.mesh
            other.meshScale = e.meshScale
            other.meshOrientation = Quat.rotateY(Math.PI)
            other.player.invisible = true
            other.player.runSpeed = 2.2
            other.player.runAcceleration = 0.1
            other.player.scale = e.meshScale.scale(e.bounds.y / other.bounds.y)
        })
    }
}

错误：

ReferenceError:Quat is not defind  at eval( index.js:8:37 )

other.meshOrientation = Quat.rotateY(Math.PI)