player

type Player struct {
	entity.Entity
	UUID [2]int64 //128bit UUID

	X, Y, Z    float64
	Yaw, Pitch float32
	OnGround   bool

	HeldItem int //拿着的物品栏位

	Health         float32 //血量
	Food           int32   //饱食度
	FoodSaturation float32 //食物饱和度

	Level int32
}