基于WebGL（ThingJS）的社区水电燃气管线3D可视化管理演示【三维管线,3D管线,水管可视化】...

r囧r小猫 2021-09-19 02:40 358阅读 0赞

地下的管线错综复杂如何，图纸并不能完全满足实际需求，我们就用ThingJS平台来模拟一个小区水，电，天然气管线演示。

[查看DEMO][DEMO]

![1545460405328_86138639][]

第一步，利用CampusBuilder搭建模拟场景。CampusBuilder的模型库有各种各样的模型，使我们搭建出的场景更逼真。使用CampusBuilde创建层级，之后再给层级加外立面就出现了当前的效果。详情移步： [CampusBuilder3D场景制作工具][CampusBuilder3D]

第二步， 初始化摄像机位置，添加四个按钮，并创建四个方法。

app.on('load', function () {
        //摄像机位置初始化
        app.camera.position = [0.4374202706634094, 101.92917348318593, 97.06808820543526];
        app.camera.target = [52.75056074670042, -18.885239034825123, -20.619558480451797];
        new THING.widget.Button('水管演示', water);
        new THING.widget.Button('电线演示', electric);
        new THING.widget.Button('燃气演示', gas);
    });
    
    function water() {
    }
    function electric() {
    }
    function gas() {
    }

第三步，创建管线，我们这里写水管线以后的电线，燃气管线同理。这里简单说一下PolygonLine，它继承THING.LineBase，同样有贴图属性，可以自己从本地上传图片至页面资源后使用。

这里用到了两个方法：

1） buildingOpacity(num)；

这个方法的主要作用就是为了将场景虚化，更好的展示我们的管线。

2）renderOrder();

这个我在代码中先注释掉了我们先看一下现在的效果:

![1545461322537_87630830][]

注意：如果没有设置renderOrder();属性的 ，管线的渲染层级没有building高 ，就会导致有被building遮盖的PolygonLine无法正常显示，设置renderOrder();属性后，渲染效果正常

![1545461420633_62310877][]

最后一步，创建出电线以及燃气线

![1545461532418_47795671][]

附上完整代码，可以直接在 [ThingJS][]平台调试

//加载场景代码
    var app = new THING.App({
        // 场景地址
        "url": "http://www.thingjs.com/./uploads/wechat/oLX7p05lsWJZUIxnIWsNXAzJ40X8/scene/管线演示2",
        //背景设置
        "skyBox": "BlueSky"
    });
    
    app.on('load', function () {
        //摄像机位置初始化
        app.camera.position = [0.4374202706634094, 101.92917348318593, 97.06808820543526];
        app.camera.target = [52.75056074670042, -18.885239034825123, -20.619558480451797];
    
        new THING.widget.Button('水管演示', water);
        new THING.widget.Button('电线演示', electric);
        new THING.widget.Button('燃气演示', gas);
    
    });
    
    function water() {
        var waterUnderPoints = []; 
        buildingOpacity(0.3);
        app.query(/building_0/).forEach(
            function (parentObj) {
                var points = [];
                points.push(parentObj.selfToWorld([5, -0.8, 0]));
                waterUnderPoints.push(points[0]);
                for (var i = 3; i <= 24; i += 3) {
                    points.push(parentObj.selfToWorld([5, i, 0]));
                    points.push(parentObj.selfToWorld([5, i, 3]));
                    points.push(parentObj.selfToWorld([-5, i, 3]));
                    points.push(parentObj.selfToWorld([-5, i, -3]));
                    points.push(parentObj.selfToWorld([5, i, -3]));
                    points.push(parentObj.selfToWorld([5, i, 0]));
                }
                points.push(parentObj.selfToWorld([5, 24, 0]));
                buildLine(points, '#0000FF');
            }
        );
        waterUnderPoints.push([15.32711, -0.79, -55.655339999999999]);
        buildLine(waterUnderPoints, '#0000FF');
        renderOrder();
    }
    
    function electric() {
        var electricUnderPoints = [];
        buildingOpacity(0.3);
        app.query(/building_0/).forEach(
            function (parentObj) {
                var points = [];
                points.push(parentObj.selfToWorld([3, -0.8, 0]));
                electricUnderPoints.push(points[0]);
                for (var i = 3; i <= 24; i += 2.5) {
                    points.push(parentObj.selfToWorld([3, i, 0]));
                    points.push(parentObj.selfToWorld([-3, i, 2]));
                }
                points.push(parentObj.selfToWorld([3, 24, 0]));
                buildLine(points, '#00FF00');
                console.log(points);
            }
        );
        electricUnderPoints.push([16.690666, -0.79, -55.115203999999999]);
        buildLine(electricUnderPoints, '#00FF00');
        renderOrder();
    }
    
    function gas() {
        var gasUnderPoints = [];
        buildingOpacity(0.3);
        app.query(/building_0/).forEach(
            function (parentObj) {
                var points = [];
                points.push(parentObj.selfToWorld([-6.2, -0.3, 0]));
                gasUnderPoints.unshift(points[0]);
                for (var i = 3; i <= 24; i += 3) {
                    points.push(parentObj.selfToWorld([-6.2, i, 0]));
                    points.push(parentObj.selfToWorld([-6.2, i, 2]));
                    points.push(parentObj.selfToWorld([6.2, i, 2]));
                    points.push(parentObj.selfToWorld([6.2, i, -2]));
                    points.push(parentObj.selfToWorld([-6.2, i, -2]));
                    points.push(parentObj.selfToWorld([-6.2, i, 0]));
                }
                points.push(parentObj.selfToWorld([-6.2, 24, 0]));
                buildLine(points, '#FF0000');
                console.log(points);
            }
        );
        gasUnderPoints.unshift([22.963023600000003, -0.3, 57.8305784]);
        buildLine(gasUnderPoints, '#FF0000');
        renderOrder();
    }
    
    /************************************************************************
     * common
    */
    
    function buildingOpacity(num) {
        app.query("*").forEach(function (obj) {
            obj.style.opacity = num;
        });
    }
    
    function renderOrder(){
        app.query('.PolygonLine').forEach(
            function (obj) {
                obj.renderOrder = -10000;
            }
        );
    }
    
    var line = null;
    function buildLine(points, color) {
        line = app.create({
            type: 'PolygonLine',
            points: points,
            style: {
                color: color,
            }
        });
        line.scrollUV = true;
    }

现实中社区管线远比DEMO中复杂，开发者可以根据自身业务实际，使用 [ThingJS][]开发出更多三维可视化应用。

[DEMO]: http://www.thingjs.com/guide/sampleindex.html?name=/uploads/wechat/oLX7p05lsWJZUIxnIWsNXAzJ40X8/%E6%B0%B4%E7%94%B5%E7%87%83%E6%B0%94%E7%AE%A1%E7%BA%BF%E6%BC%94%E7%A4%BA.js
[1545460405328_86138639]: /images/20210726/4c4f5fa702244bb097b2cc00a1da4a1c.png
[CampusBuilder3D]: http://www.thingjs.com/guide/?m=campus
[1545461322537_87630830]: /images/20210726/a883d2dbba334c658b7a368ffa31fdfb.png
[1545461420633_62310877]: /images/20210726/a817bac639904402aaf6061388516202.png
[1545461532418_47795671]: /images/20210726/7f7812d0632848b59ea840df41220b22.png
[ThingJS]: http://www.thingjs.com/