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基于WEBGL架構的3D可視化平臺—新風系統演示
2020-10-14 by uino 15.0K 技術分享

新風系統是根據在密閉的室內一側用專用設備向室內送新風，再從另一側由專用設備向室外排出，在室內會形成“新風流動場”，從而滿足室內新風換氣的需要。UINO實施方案是：采用高風壓、大流量風機、依靠機械強力由一側向室內送風，由另一側用專門設計的排風風機向室外排出的方式強迫在系統內形成新風流動場。在送風的同時對進入室內的空氣進過濾、消毒、殺菌、增氧、預熱（冬天）。

接下來就用ThingJs平臺來搭建一個新風系統

第一步，利用CampusBuilder搭建模擬場景。CampusBuilder的模型庫有各種各樣的模型，使我們搭建出的場景更逼真。

//加載場景代碼
var app = new THING.App({
    // 場景地址
    "url": "http://www.thingjs.com/./uploads/wechat/oLX7p05lsWJZUIxnIWsNXAzJ40X8/scene/新風演示2",

});

第二步，創建三個數組來保存每個風的模型。

var hotWindGroup = [];
var coolWindGroup = [];
var newWindGroup = [];
var wind = null;

第三步，構造一個創建風的函數，為了方便創建風及其位置，我們選取排風設備為風的父物體，將創建出來的風的visiable屬性設置為false（這里這個坐標問題可以看一下官網的教程中控制物體中的坐標轉換）。

function createWind(parent, x, y, angle, localPosition, color, group) {
    rs = app.query(parent)[0];
    wind = app.create({
        type: 'Thing',
        name: 'hotWind',
        url: 'http://model.3dmomoda.cn/models/4da706d8a37047298c0318a5b9546abd/0/gltf/',
        localPosition: localPosition,
        scale: [1, 2, 1],
        angle: angle,
        parent: rs,
    });
    wind.style.color = color;
    wind.visible = false;
    wind.rotateX(x);
    wind.rotateY(y);
    group.push(wind);
}

第四步，開始創建風模型，并調整一下攝像機的角度及位置。

app.on('load', function () {
    //攝像機角度
    app.camera.position = [-22.91452445633646, 30.46296743148116, -23.83548169673341];
    app.camera.target = [-13.532807014407252, 5.6565539015865856, -3.3431546399681276];
    //hotWind
    createWind('空調1', 0, 0, 0, [0, -2, 0], '#FF0000', hotWindGroup);
    createWind('空調1', 0, 0, 0, [0, -2, 0.5], '#FF0000', hotWindGroup);
    createWind('空調1', 0, 0, 0, [0, -2, 1], '#FF0000', hotWindGroup);
    createWind('空調2', 0, 0, 0, [0, -2, 0], '#FF0000', hotWindGroup);
    createWind('空調2', 0, 0, 0, [0, -2, 0.5], '#FF0000', hotWindGroup);
    createWind('空調2', 0, 0, 0, [0, -2, 1], '#FF0000', hotWindGroup);
    //coolWind
    createWind('空調1', 0, 0, 0, [0, -2, 0], '#0000FF', coolWindGroup);
    createWind('空調1', 0, 0, 0, [0, -2, 0.5], '#0000FF', coolWindGroup);
    createWind('空調1', 0, 0, 0, [0, -2, 1], '#0000FF', coolWindGroup);
    createWind('空調2', 0, 0, 0, [0, -2, 0], '#0000FF', coolWindGroup);
    createWind('空調2', 0, 0, 0, [0, -2, 0.5], '#0000FF', coolWindGroup);
    createWind('空調2', 0, 0, 0, [0, -2, 1], '#0000FF', coolWindGroup);
    //newWind
    createWind('排風1', -50, 0, 0, [0, -0.5, 2], '#00FF00', newWindGroup);
    createWind('排風1', -50, 0, 0, [0, -0.5, 4], '#00FF00', newWindGroup);
    createWind('排風1', -50, 0, 0, [0, -0.5, 6], '#00FF00', newWindGroup);
    createWind('排風1', -50, 50, 50, [2, -0.5, 7], '#00FF00', newWindGroup);
    createWind('排風1', -50, 50, 50, [4, -0.5, 8], '#00FF00', newWindGroup);
    createWind('排風1', -50, 50, 50, [6, -0.5, 9], '#00FF00', newWindGroup);
    createWind('排風1', -50, 50, 50, [8, -0.5, 12], '#00FF00', newWindGroup);
    createWind('排風1', -50, 50, 50, [10, -0.5, 15], '#00FF00', newWindGroup);
    createWind('排風1', -50, 50, 50, [12, -0.5, 18], '#00FF00', newWindGroup);
    createWind('排風1', -50, 50, 50, [10, -0.5, 9], '#00FF00', newWindGroup);
    createWind('排風1', -50, 50, 50, [14, -0.5, 9], '#00FF00', newWindGroup);
    createWind('排風1', -50, 50, 50, [18, -0.5, 9], '#00FF00', newWindGroup);
    createWind('排風1', -50, 50, 50, [22, -0.5, 9], '#00FF00', newWindGroup);
    createWind('排風1', -50, 50, 50, [26, -0.5, 9], '#00FF00', newWindGroup);
    createWind('排風2', -50, 0, 0, [0, -0.5, 2], '#00FF00', newWindGroup);
    createWind('排風3', -50, 0, 0, [0, -0.5, 2], '#00FF00', newWindGroup);
    createWind('排風4', -50, 0, 0, [0, -0.5, 2], '#00FF00', newWindGroup);
    createWind('排風4', -50, 0, 0, [0, -0.5, 4], '#00FF00', newWindGroup);
    createWind('排風4', -50, 0, 0, [0, -0.5, 6], '#00FF00', newWindGroup);
    createWind('排風4', -50, 0, 0, [0, -0.5, 8], '#00FF00', newWindGroup);
    createWind('排風4', -50, 0, 0, [0, -0.5, 10], '#00FF00', newWindGroup);
    createWind('排風4', -50, 0, 0, [0, -0.5, 12], '#00FF00', newWindGroup);
    createWind('排風4', -90, 50, 50, [2, -0.6, 12], '#00FF00', newWindGroup);
    createWind('排風4', -90, 50, 50, [4, -0.7, 12], '#00FF00', newWindGroup);
    createWind('排風4', -90, 50, 50, [6, -0.8, 13], '#00FF00', newWindGroup);
    createWind('排風4', -90, 50, 90, [8, -0.8, 11], '#00FF00', newWindGroup);
    createWind('排風4', -90, 50, 90, [12, -0.8, 9], '#00FF00', newWindGroup);
    createWind('排風4', -90, 50, 90, [16, -0.8, 7], '#00FF00', newWindGroup);
    createWind('排風4', -90, 50, 90, [20, -0.8, 5], '#00FF00', newWindGroup);
    createWind('排風4', -90, 50, 90, [24, -0.8, 3], '#00FF00', newWindGroup);
    createWind('排風4', -90, 0, 90, [8, -0.8, 13], '#00FF00', newWindGroup);
    createWind('排風4', -90, 0, 90, [12, -0.8, 13], '#00FF00', newWindGroup);
    createWind('排風4', -90, 0, 90, [16, -0.7, 13], '#00FF00', newWindGroup);
    createWind('排風4', -90, 0, 90, [20, -0.6, 13], '#00FF00', newWindGroup);
    //createWind('排風4', -90, 0, 90, [24, -0.5, 13], '#00FF00', newWindGroup);

    //熱風演示
    new THING.widget.Button('熱風演示', function () {
        for (let i of coolWindGroup) {
            i.visible = false;
        };
        for (let i of hotWindGroup) {
            i.visible = true;
        };

    });

    //冷風演示
    new THING.widget.Button('冷風演示', function () {
        for (let i of coolWindGroup) {
            i.visible = true;
        };
        for (let i of hotWindGroup) {
            i.visible = false;
        };
    });

    //新風演示
    new THING.widget.Button('新風演示', function () {
        playNewWind();
    });

    function playNewWind() {
        for (var i = 0; i < newWindGroup.length; i++) {
            if(i==newWindGroup.length-1)
            return;
            newWindGroup[i].visible = true;
            newWindGroup[i].moveTo({
                "time": 4000,
                "position": newWindGroup[i+1].position,
            });
        }
});

第五步，運行項目。演示地址

思考與總結：

首先就是空間坐標系下轉父物體坐標真是弄暈了，看了官網的教程多少理解了一點。剛開始的時候我一直認為我的子物體以父物體坐標下放置的時候，子物體坐標軸的問題指向的問題。看了教程發現自己的擔心多余了，就好像是人戴鴨舌帽帽子不管戴在誰的頭上都一樣。

其次就是讓風動起來，最初是想讓一個模型在空間中運動，發現效果不好用。最后就創建了多個模型他們對應著有各自的點，讓每一個模型向他下一個模型的位置移動實現運動。

完整代碼

/加載場景代碼
var app = new THING.App({
    // 場景地址
    "url": "http://www.thingjs.com/./uploads/wechat/oLX7p05lsWJZUIxnIWsNXAzJ40X8/scene/新風演示2",

});

var hotWindGroup = [];
var coolWindGroup = [];
var newWindGroup = [];
var wind = null;

function createWind(parent, x, y, angle, localPosition, color, group) {
    rs = app.query(parent)[0];
    wind = app.create({
        type: 'Thing',
        name: 'hotWind',
        url: 'http://model.3dmomoda.cn/models/4da706d8a37047298c0318a5b9546abd/0/gltf/',
        localPosition: localPosition,
        scale: [1, 2, 1],
        angle: angle,
        parent: rs,
    });
    wind.style.color = color;
    wind.visible = false;
    wind.rotateX(x);
    wind.rotateY(y);
    group.push(wind);
}

app.on('load', function () {
    //攝像機角度
    app.camera.position = [-22.91452445633646, 30.46296743148116, -23.83548169673341];
    app.camera.target = [-13.532807014407252, 5.6565539015865856, -3.3431546399681276];
    //hotWind
    createWind('空調1', 0, 0, 0, [0, -2, 0], '#FF0000', hotWindGroup);
    createWind('空調1', 0, 0, 0, [0, -2, 0.5], '#FF0000', hotWindGroup);
    createWind('空調1', 0, 0, 0, [0, -2, 1], '#FF0000', hotWindGroup);
    createWind('空調2', 0, 0, 0, [0, -2, 0], '#FF0000', hotWindGroup);
    createWind('空調2', 0, 0, 0, [0, -2, 0.5], '#FF0000', hotWindGroup);
    createWind('空調2', 0, 0, 0, [0, -2, 1], '#FF0000', hotWindGroup);
    //coolWind
    createWind('空調1', 0, 0, 0, [0, -2, 0], '#0000FF', coolWindGroup);
    createWind('空調1', 0, 0, 0, [0, -2, 0.5], '#0000FF', coolWindGroup);
    createWind('空調1', 0, 0, 0, [0, -2, 1], '#0000FF', coolWindGroup);
    createWind('空調2', 0, 0, 0, [0, -2, 0], '#0000FF', coolWindGroup);
    createWind('空調2', 0, 0, 0, [0, -2, 0.5], '#0000FF', coolWindGroup);
    createWind('空調2', 0, 0, 0, [0, -2, 1], '#0000FF', coolWindGroup);

    //newWind
    createWind('排風1', -50, 0, 0, [0, -0.5, 2], '#00FF00', newWindGroup);
    createWind('排風1', -50, 0, 0, [0, -0.5, 4], '#00FF00', newWindGroup);
    createWind('排風1', -50, 0, 0, [0, -0.5, 6], '#00FF00', newWindGroup);
    createWind('排風1', -50, 50, 50, [2, -0.5, 7], '#00FF00', newWindGroup);
    createWind('排風1', -50, 50, 50, [4, -0.5, 8], '#00FF00', newWindGroup);
    createWind('排風1', -50, 50, 50, [6, -0.5, 9], '#00FF00', newWindGroup);
    createWind('排風1', -50, 50, 50, [8, -0.5, 12], '#00FF00', newWindGroup);
    createWind('排風1', -50, 50, 50, [10, -0.5, 15], '#00FF00', newWindGroup);
    createWind('排風1', -50, 50, 50, [12, -0.5, 18], '#00FF00', newWindGroup);
    createWind('排風1', -50, 50, 50, [10, -0.5, 9], '#00FF00', newWindGroup);
    createWind('排風1', -50, 50, 50, [14, -0.5, 9], '#00FF00', newWindGroup);
    createWind('排風1', -50, 50, 50, [18, -0.5, 9], '#00FF00', newWindGroup);
    createWind('排風1', -50, 50, 50, [22, -0.5, 9], '#00FF00', newWindGroup);
    createWind('排風1', -50, 50, 50, [26, -0.5, 9], '#00FF00', newWindGroup);
    createWind('排風2', -50, 0, 0, [0, -0.5, 2], '#00FF00', newWindGroup);
    createWind('排風3', -50, 0, 0, [0, -0.5, 2], '#00FF00', newWindGroup);
    createWind('排風4', -50, 0, 0, [0, -0.5, 2], '#00FF00', newWindGroup);
    createWind('排風4', -50, 0, 0, [0, -0.5, 4], '#00FF00', newWindGroup);
    createWind('排風4', -50, 0, 0, [0, -0.5, 6], '#00FF00', newWindGroup);
    createWind('排風4', -50, 0, 0, [0, -0.5, 8], '#00FF00', newWindGroup);
    createWind('排風4', -50, 0, 0, [0, -0.5, 10], '#00FF00', newWindGroup);
    createWind('排風4', -50, 0, 0, [0, -0.5, 12], '#00FF00', newWindGroup);
    createWind('排風4', -90, 50, 50, [2, -0.6, 12], '#00FF00', newWindGroup);
    createWind('排風4', -90, 50, 50, [4, -0.7, 12], '#00FF00', newWindGroup);
    createWind('排風4', -90, 50, 50, [6, -0.8, 13], '#00FF00', newWindGroup);
    createWind('排風4', -90, 50, 90, [8, -0.8, 11], '#00FF00', newWindGroup);
    createWind('排風4', -90, 50, 90, [12, -0.8, 9], '#00FF00', newWindGroup);
    createWind('排風4', -90, 50, 90, [16, -0.8, 7], '#00FF00', newWindGroup);
    createWind('排風4', -90, 50, 90, [20, -0.8, 5], '#00FF00', newWindGroup);
    createWind('排風4', -90, 50, 90, [24, -0.8, 3], '#00FF00', newWindGroup);
    createWind('排風4', -90, 0, 90, [8, -0.8, 13], '#00FF00', newWindGroup);
    createWind('排風4', -90, 0, 90, [12, -0.8, 13], '#00FF00', newWindGroup);
    createWind('排風4', -90, 0, 90, [16, -0.7, 13], '#00FF00', newWindGroup);
    createWind('排風4', -90, 0, 90, [20, -0.6, 13], '#00FF00', newWindGroup);
    //createWind('排風4', -90, 0, 90, [24, -0.5, 13], '#00FF00', newWindGroup);

    //熱風演示
    new THING.widget.Button('熱風演示', function () {
        for (let i of coolWindGroup) {
            i.visible = false;
        };
        for (let i of hotWindGroup) {
            i.visible = true;
            //playWind(i,[0,-0.6499999999999999,0],[0,-0.7234152255572697,0.46352549156242107],[0,-1.2683221215612903,1.2135254915624212],[0,-2.15,1.5])
        };

    });

    //冷風演示
    new THING.widget.Button('冷風演示', function () {
        for (let i of coolWindGroup) {
            i.visible = true;
        };
        for (let i of hotWindGroup) {
            i.visible = false;
        };
    });

    //新風演示
    new THING.widget.Button('新風演示', function () {
        playNewWind();
    });

    function playNewWind() {
        for (var i = 0; i < newWindGroup.length; i++) {
            if(i==newWindGroup.length-1)
            return;
            newWindGroup[i].visible = true;
            newWindGroup[i].moveTo({
                "time": 4000,
                "position": newWindGroup[i+1].position,
            });
        }
    }

});
--------------------- 
作者：extends  Thread