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效果：地铁将经过3个站，每到1个站就会开关1次车门，到第3个站后会返程，一直重复下去，不会出现偏移

效果因人而异（划掉）

在食用本代码前，请挖好隧道、摆好模型（如果没有强迫症的话可以不用摆）并设置好名字：

               车尾

车窗-3               车窗-2

车门-1               车门-3

          车顶 车底

车门-2               车门-4

车窗-1               车窗-4

             车头

world.querySelectorAll('.dt').forEach((metro) => {//地铁整体移动代码
    metro.fixed = true//不受外力影响
    metro.collides = true//允许碰撞
    metro.startPos = []
    metro.middlePos = []
    metro.endPos = []

    if (metro.id == '车头') {
        metro.startPos = [243.3, 2.6, 37.5]
        metro.middlePos = [129.0, 2.6, 37.5]
        metro.endPos = [14.7, 2.6, 37.5]
    } else if (metro.id == '车尾') {
        metro.startPos = [250.9, 2.6, 37.5]
        metro.middlePos = [136.6, 2.6, 37.5]
        metro.endPos = [22.3, 2.6, 37.5]
    } else if (metro.id == '车底') {
        metro.startPos = [247.1, 1.0, 37.5]
        metro.middlePos = [132.8, 1.0, 37.5]
        metro.endPos = [18.5, 1.0, 37.5]
    }else if(metro.id == '车顶'){
        metro.startPos = [247.1, 4.1, 37.5]
        metro.middlePos = [132.8, 4.1, 37.5]
        metro.endPos = [18.5, 4.1, 37.5]
    }else if (metro.id == '车窗-1') {
        metro.startPos = [244.7, 2.6, 36.2]
        metro.middlePos = [130.4, 2.6, 36.2]
        metro.endPos = [16.1, 2.6, 36.2]
    }else if (metro.id == '车窗-2') {
        metro.startPos = [249.5, 2.6, 38.8]
        metro.middlePos = [135.2, 2.6, 38.8]
        metro.endPos = [20.9, 2.6, 38.8]
    }else if (metro.id == '车窗-3') {
        metro.startPos = [249.5, 2.6, 36.2]
        metro.middlePos = [135.2, 2.6, 36.2]
        metro.endPos = [20.9, 2.6, 36.2]
    }else if (metro.id == '车窗-4') {
        metro.startPos = [244.7, 2.6, 38.8]
        metro.middlePos = [130.4, 2.6, 38.8]
        metro.endPos = [16.1, 2.6, 38.8]
    }
    metro.ani = metro.animate([
        { position: metro.startPos, duration: 2 },//地铁呆在起点
        { position: metro.startPos, duration: 5 },//地铁开往第2站
        { position: metro.middlePos, duration: 2 },//地铁呆在第2站
        { position: metro.middlePos, duration: 5 },//地铁开往终点
        { position: metro.endPos, duration: 2 },//地铁呆在终点
        { position: metro.endPos, duration: 5 },//地铁开往第2站
        { position: metro.middlePos, duration: 2 },//地铁呆在第2站
        { position: metro.middlePos, duration: 5 },//地铁开往起点

    ], {
        duration: 16 * 67.72/1.5, //播放一个循环共用时67.72秒（11.93*4）+5*4,
        iterations: Infinity,//动画无限次循环播放
        direction: Box3AnimationDirection.WRAP,//让动画实体从终点回到起点
    })
})

world.querySelectorAll('.地铁门').forEach((metro) => {//开关车门动画
    metro.fixed = true//不受外力影响
    metro.collides = true//允许碰撞
    metro.startPos = []
    metro.middlePos = []
    metro.endPos = []
    metro.sp=[]
    metro.mp=[]
    metro.ep=[]
    if (metro.id == '车门-1') {
        metro.startPos = [247.67, 2.6, 36.2]
        metro.middlePos = [133.37, 2.6, 36.2]
        metro.endPos = [19.07, 2.6, 36.2]
        metro.sp = [248.67,2.6,36.2]
        metro.mp = [134.37, 2.6, 36.2]
        metro.ep = [20.07, 2.6, 36.2]
    }else if (metro.id == '车门-2') {
        metro.startPos = [246.63, 2.6, 36.2]
        metro.middlePos = [132.33, 2.6, 36.2]
        metro.endPos = [18.03, 2.6, 36.2]
        metro.sp = [245.63,2.6,36.2]
        metro.mp = [131.33, 2.6, 36.2]
        metro.ep = [17.03, 2.6, 36.2]
    }else if (metro.id == '车门-3') {
        metro.startPos = [247.67, 2.6, 38.8]
        metro.middlePos = [133.37, 2.6, 38.8]
        metro.endPos = [19.07, 2.6, 38.8]
        metro.sp = [248.67,2.6,38.8]
        metro.mp = [134.37, 2.6, 38.8]
        metro.ep = [20.07, 2.6, 38.8]
    }else if (metro.id == '车门-4') {
        metro.startPos = [246.63, 2.6, 38.8]
        metro.middlePos = [132.33, 2.6, 38.8]
        metro.endPos = [18.03, 2.6, 38.8]
        metro.sp = [245.63,2.6,38.8]
        metro.mp = [131.33, 2.6, 38.8]
        metro.ep = [17.03, 2.6, 38.8]
    }

    /*
    metro.sp = metro.startPos; metro.sp[0]++;
    metro.mp = metro.startPos; metro.mp[0]++;
    metro.ep = metro.startPos; metro.ep[0]++;
    world.say('名字叫做：'+ metro.id +'的实体的'+ `初始坐标为：${metro.startPos} 中间坐标为：${metro.middlePos} 终点坐标为:${metro.endPos}`)
    */

    metro.ani = metro.animate([
        { position: metro.startPos, duration: 0.1 },//车门开~
        { position: metro.sp, duration: 1.5 },//车门保持开启~
        { position: metro.sp, duration: 0.45 },//车门关~
        { position: metro.startPos, duration: 5.1 },//跑到第2站
        { position: metro.middlePos, duration: 0.1 },//车门开~
        { position: metro.mp, duration: 1.5 },//车门保持开启~
        { position: metro.mp, duration: 0.45},//车门关~
        { position: metro.middlePos, duration: 5.1 },//跑到终点~
        { position: metro.endPos, duration: 0.1 },//车门开~
        { position: metro.ep, duration: 1.5 },//车门保持开启~
        { position: metro.ep, duration: 0.45 },//车门关~
        { position: metro.endPos, duration: 5.1 },//跑到第2站
        { position: metro.middlePos, duration: 0.1 },//车门开~
        { position: metro.mp, duration: 1.5 },//车门保持开启~
        { position: metro.mp, duration: 0.45 },//车门关~
        { position: metro.middlePos, duration: 5.1 },//跑到起点

    ], {
        duration: 16 * 67.72/1.5, //播放一个循环共用时67.72秒（11.93*4）+5*4,
        iterations: Infinity,//动画无限次循环播放
        direction: Box3AnimationDirection.WRAP,//让动画实体从终点回到起点
    })
})

然后就阔以了~~~

或许我可以换掉Omega里面的地铁了）））