webgl(three.js)实现室内定位,楼宇bim、实时定位三维可视化解决方案

（写在前面，谈谈物联网展会）上次深圳会展中心举行物联网展会，到了展会一看，80%以上的物联网应用都是在搞rfid，室内定位，我一度怀疑物联网落地方案的方向局限性与市场导向，后来多方面了解才明白，展会上看到的不能体现目前物联网最前沿最广泛的应用，很多大的企业与技术前沿企业没有参与这样的展会，一是不屑于参加，二是展会带来的市场价值实在太少太少，展会最大的价值就是让同行之间再抄一抄（国内大部分企业基本这样，互相山寨），看看各家都做了啥，所以，展会上我们所看到的往往不是企业最核心最好的东西，不能体现当前国内物联网最前沿的技术与发展状况。

前言：gps、北斗系统将全球地图导航定位发展到了极致的程度，但精确精度还不能达到两米以内， 如何解决解决室内这最后几米的定位问题，国内外各大厂家各出奇招。因为有市场需求所以有资本驱动，室内精确定位在仓库，档案馆，*，医院，办公，人员，以及各种高价值重要资产等定位场景中都要这样的需求。室内定位设想应用于人员的管理、机器人仿生、被标签物的定位追踪等等。如果室内定位能够解决精度，延迟，容量三方面瓶颈，其市场应用价值不可限量

技术目标：将非可视内容的可视化呈现，更直观的掌控数据情况。

一、市场背景与领域：

　　1、信息采集定位：打卡、签注、活动范围圈定、电子围栏、工作中日常监控等等。

　　2、安防监控定位：安防领域比较广泛，包括了消防、监控、维保安保等等，这些具体行业划分方面对精准定位可视化需求都比较强烈。保护人民生命财产、监控消防英雄实时位置这些都是有待解决的问题。

　　3、工业4.0：这是最新的工业诉求，真正落地的，目前还没有几家，其主要目标就是通过室内定位技术让整个生产流程实现可视化，可追踪化。

　　4、*、医院、机场领域、商场。定位可视化需求也比较强烈

　　　　*：防止越狱，防止自杀等。每个犯人手上上一个不可拆卸的手环，只要系统检查到有人某处停留时间过长，系统就会报警。

　　　　医院：为患者提供快捷的寻址巡诊服务。

　　　　机场、商场：为客人，旅客提供方便快捷的定位导航服务，为机场提供可疑物品贴标签定位方案。

　　5、仓库资产定位

　　6、无人机、物流、快递派送定位

　　7、app应用服务，适当位置推送适当服务。

　　8、游戏场景，vr应用

　等等，随便想想就这么多，看来市场还是比较有前景的。

二、技术方案分析：

　　当前市面上室内定位技术主要分为下列几种：

　　1、wifi探针+摄像机智能分析技术：这种技术利用wifi探针撤出大体位置在用摄像机智能分析，分析出精确位置，优点是精确度高，缺点是成本高，摄像机死角多。

　　　　

　　2、无源rfid+读卡器技术：这种技术是目前市面上用的比较多的技术，比如超市，仓储，优点是成本低，缺点是没什么精度要求 ，精度范围 是房间内

 

　　3、低功耗有源rfid+读卡器基地器+智能分析：这种利用有源发射信号的方式定位，精确多虽然高 但是读卡器多的情况下会出现误报，乱报情况，这就需要智能分析，数据清洗。目前比较看好的方案，成本低，精确度一米以内。

　　4、蓝牙信号强度探测分析：精確的高，但是藍牙信號受阻擋，受干扰比较严重。这也是展会中看到的方案。

　　5、定位地毯+有源信号卡（手环）：这是精确度非常高的方案，但是成本也很高。要在室内铺上一层定位弱电地毯。

　　6、红外探测技术、超宽带技术、超声波技术：和蓝牙的方案差不多。

 

三、三维可视化显示

我们还是和前面的课程( 使用webgl(three.js)搭建一个3d智慧园区、3d建筑，3d消防模拟，web版3d,bim管理系统——第四课（炫酷版一）)一样选择webgl无插件解决方案，直观体现定位可视化。

3.1、首先是场景搭建，搭建需要定位的三维场景。这里我们随便做了一栋大楼，作为需要定位的场景。

下图是gif图效果，（为了上传到文章里，特意做了帧数删减）

模型代码：

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3.2、显示单个楼层实时定位效果。这里我们动态添加定位标签。标注标签。在右下角显示标签信息，规避场景内凌乱。

楼层切换效果

逻辑代码：　

   if (_this.build1currentshowflow == 8&&_this.currentshowlocationstate == 1) {
             _this.closelocation(doshowanimiation);
    } else {
             doshowanimiation();
      }
     function doshowanimiation(){
    wt3dobj.commonfunc.changecameraposition(
        { x: -3160 + (8 - floornub) * 300, y: 5645 - (8 - floornub) * 300, z: -3292 + (8 - floornub) * 300 },
        { x: 80, y: 23, z: 155 },
        500,
       function () {
                if (_this.build1currentshowflow > floornub)
                {
                    var start = _this.build1currentshowflow;
                    _this.build1currentshowflow = floornub;
                    for (var i = start; i >= floornub + 1; i--) {
                        (function (floorindex) {
                            settimeout(function () {
                                var movemodesname = "cm_dingweifloor_" + floorindex;
                                var movemodel = _this.outfloormodels[movemodesname];
                                if (!movemodel.oldposition) {
                                    movemodel.oldposition = {
                                        x: movemodel.position.x,
                                        y: movemodel.position.y,
                                        z: movemodel.position.z
                                    };
                                }
                                var movetopositon = movemodel.position.y + 5000;
                                new tween.tween(movemodel.position).to({
                                    y: movetopositon
                                }, 1000).oncomplete(function () {
                                    movemodel.visible = false;
                                    if (floorindex == floornub + 1) {
                                        if (_this.currentshowlocationstate == 1) {
                                            if (floornub < 8) {
                                                var showtxt = "";
                                                showtxt += _this.addfloormarks(floornub);
                                                $("#showtext").html(showtxt);
                                            } else {
                                                _this.showlocation();
                                            }
                                        }
                                    }
                                }).start();
                            }, 500 * (start+1 - floorindex));
                        })(i);
                    }

                }
                else if (_this.build1currentshowflow < floornub)
                {
                    var start = _this.build1currentshowflow+1;
                    _this.build1currentshowflow = floornub;
                    for (var i = start; i <= floornub ; i++) {
                        (function (floorindex) {
                            settimeout(function () {
                                var movemodesname = "cm_dingweifloor_" + floorindex;
                                var movemodel = _this.outfloormodels[movemodesname];
                                var movetopositon = movemodel.oldposition.y;
                                movemodel.visible = true;
                                new tween.tween(movemodel.position).to({
                                    y: movetopositon
                                }, 1000).oncomplete(function () {
                                    if (floorindex == floornub) {
                                    settimeout(function () {
                                        if (_this.currentshowlocationstate == 1) {
                                            if (floornub < 8) {
                                                var showtxt = "";
                                                showtxt += _this.addfloormarks(floornub);
                                                $("#showtext").html(showtxt);
                                            } else {
                                                _this.showlocation();
                                            }
                                        }
                                    }, 150 * floornub - start);
                                    }


                                }).start();
                            }, 500 * (floorindex-start + 1));
                        })(i);
                    }

                }
                
       });
     }

　　

单楼层显示定位效果

‘’

动态标签模型代码：

 [{ "show": true, "uuid": "", "name": "dmark_" + name, "objtype": "groupobj", "scale": { "x": 1, "y": 1, "z": 1 }, "position": position, "rotation": [{ "direction": "x", "degree": 0 }], "childrens": [{ "name": "dmark_" + name + "objcren0", "objtype": "picidentification", "size": { "x": size.width, "y": size.height }, "position": { "x": 0, "y": 0, "z": 0 }, "imgurl": picurl, "showsortnub": 3480, "animation": null, "dbclickevents": null, "binddevid": null, "binddevname": null, "devinfo": null, "bindmeteid": null, "bindmetename": null }, { "name": "dmark_" + name + "objcren1", "objtype": "maketextsprite", "textcolor": { "r": txtcolor.r, "g": txtcolor.g, "b": txtcolor.b, "a": 1 }, "message": "" + shownub, "fontsize": 300, "canvaswidth": 400, "canvasheight": 350, "position": { "x": 0, "y": 64.901, "z": 0 }, "showsortnub": 3481, "animation": null, "dbclickevents": null, "binddevid": null, "binddevname": null, "devinfo": null, "bindmeteid": null, "bindmetename": null }], "showsortnub": 3480 }];

单楼层显示定位代码：

modelbusiness.prototype.marks = [];
modelbusiness.prototype.addmark = function (name, position, size, picurl,shownub,txtcolor) {
    if (this.marks.indexof("dmark_" + name) >= 0) {
        modelbusiness.movemark("dmark_" + name, position, 1000);
        return;
    }
    this.marks.push("dmark_" + name);
    var timestrik = new date().gettime();

    var showhtml = "hello";
    var local = [{ "show": true, "uuid": "", "name": "dmark_" + name, "objtype": "groupobj", "scale": { "x": 1, "y": 1, "z": 1 }, "position": position, "rotation": [{ "direction": "x", "degree": 0 }], "childrens": [{ "name": "dmark_" + name + "objcren0", "objtype": "picidentification", "size": { "x": size.width, "y": size.height }, "position": { "x": 0, "y": 0, "z": 0 }, "imgurl": picurl, "showsortnub": 3480, "animation": null, "dbclickevents": null, "binddevid": null, "binddevname": null, "devinfo": null, "bindmeteid": null, "bindmetename": null }, { "name": "dmark_" + name + "objcren1", "objtype": "maketextsprite", "textcolor": { "r": txtcolor.r, "g": txtcolor.g, "b": txtcolor.b, "a": 1 }, "message": "" + shownub, "fontsize": 300, "canvaswidth": 400, "canvasheight": 350, "position": { "x": 0, "y": 64.901, "z": 0 }, "showsortnub": 3481, "animation": null, "dbclickevents": null, "binddevid": null, "binddevname": null, "devinfo": null, "bindmeteid": null, "bindmetename": null }], "showsortnub": 3480 }];


    //[{ "name": "dmark_" + name, "objtype": "picidentification", "size": { "x": size.width, "y": size.height }, "position": position, "imgurl": picurl, "showsortnub": 3480, "show": true, "customtype1": "", "customtype2": "", "animation": null, "dbclickevents": null, "binddevid": null, "binddevname": null, "devinfo": null, "bindmeteid": null, "bindmetename": null },
    //    { "name": "dmark_txtnub_" + name, "objtype": "maketextsprite", "textcolor": { "r": 255, "g": 255, "b": 0, "a": 1 }, "message": "001", "fontsize": 100, "canvaswidth": 100, "canvasheight": 120, "position": { "x": position.x, "y": position.y + 53.904, "z": position.z}, "showsortnub": 5, "animation": null, "dbclickevents": null, "binddevid": null, "binddevname": null, "devinfo": null, "bindmeteid": null, "bindmetename": null }];
    wt3dobj.commonfunc.loadmodelsbyjsons(local, { x: 0, y: 0, z: 0 }, { x: 0, y: 0, z: 0 }, true);

}
modelbusiness.prototype.addmarktxt = function (showhtml, _obj, buildnub, position, closefunc) {
    var timestrik = new date().gettime();
    var _obj = {
        uuid: 'daf4',
        name: "showmark",
        showsortnub: 1,
        objtype: "divtagging",
        tagtype: 'sprite',//plane/sprite
        elementparam: {
            cssid: "style_divtest",
            css: "",
            marginvalue: {
                x: 0,
                y: 0,
                z: 0
            },
            divid: 'divtest',
            html: "<div id='divtest'><div  style='width:300px;height:200px;background-color:rgba(0,0,0,1);padding:10px;border:1px solid #00ffff;'>" + showhtml + "</div > </div >",
        },
        position: { x: position.x, y: position.y + 500, z: position.z },
        scale: { x: 8, y: 8, z: 1 },
        rotation: [],
    }
    var ccd = wt3dobj.adddivtagging(wt3dobj, _obj);
    ccd.renderorder = 1;
    wt3dobj.addobject(ccd);
}

3.3、显示整体楼层实时定位效果。

 

gif录屏图

　　实现代码：

modelbusiness.prototype.getallfloorbuild = function () {
    var _this = this;
    if (!_this.outfloormodels) {
        var modelnames = ["cm_dingweifloor_8", "cm_dingweifloor_7", "cm_dingweifloor_6", "cm_dingweifloor_5", "cm_dingweifloor_4", "cm_dingweifloor_3", "cm_dingweifloor_2", "cm_dingweifloor_1"];
        var models = wt3dobj.commonfunc.findobjectsbynames(modelnames);
        _this.outfloormodels = {};
        $.each(models, function (_index, _obj) {
            _this.outfloormodels[_obj.name] = _obj;
        });
    }
    return _this.outfloormodels;
}
//floornub:楼层编号
modelbusiness.prototype.showfloor = function ( floornub) {
    var _this = this;
     _this.getallfloorbuild();
     _this.removeallmark();

    if (_this.build1currentshowflow == 8&&_this.currentshowlocationstate == 1) {
             _this.closelocation(doshowanimiation);
    } else {
             doshowanimiation();
      }
     function doshowanimiation(){
    wt3dobj.commonfunc.changecameraposition(
        { x: -3160 + (8 - floornub) * 300, y: 5645 - (8 - floornub) * 300, z: -3292 + (8 - floornub) * 300 },
        { x: 80, y: 23, z: 155 },
        500,
       function () {
                if (_this.build1currentshowflow > floornub)
                {
                    var start = _this.build1currentshowflow;
                    _this.build1currentshowflow = floornub;
                    for (var i = start; i >= floornub + 1; i--) {
                        (function (floorindex) {
                            settimeout(function () {
                                var movemodesname = "cm_dingweifloor_" + floorindex;
                                var movemodel = _this.outfloormodels[movemodesname];
                                if (!movemodel.oldposition) {
                                    movemodel.oldposition = {
                                        x: movemodel.position.x,
                                        y: movemodel.position.y,
                                        z: movemodel.position.z
                                    };
                                }
                                var movetopositon = movemodel.position.y + 5000;
                                new tween.tween(movemodel.position).to({
                                    y: movetopositon
                                }, 1000).oncomplete(function () {
                                    movemodel.visible = false;
                                    if (floorindex == floornub + 1) {
                                        if (_this.currentshowlocationstate == 1) {
                                            if (floornub < 8) {
                                                var showtxt = "";
                                                showtxt += _this.addfloormarks(floornub);
                                                $("#showtext").html(showtxt);
                                            } else {
                                                _this.showlocation();
                                            }
                                        }
                                    }
                                }).start();
                            }, 500 * (start+1 - floorindex));
                        })(i);
                    }

                }
                else if (_this.build1currentshowflow < floornub)
                {
                    var start = _this.build1currentshowflow+1;
                    _this.build1currentshowflow = floornub;
                    for (var i = start; i <= floornub ; i++) {
                        (function (floorindex) {
                            settimeout(function () {
                                var movemodesname = "cm_dingweifloor_" + floorindex;
                                var movemodel = _this.outfloormodels[movemodesname];
                                var movetopositon = movemodel.oldposition.y;
                                movemodel.visible = true;
                                new tween.tween(movemodel.position).to({
                                    y: movetopositon
                                }, 1000).oncomplete(function () {
                                    if (floorindex == floornub) {
                                    settimeout(function () {
                                        if (_this.currentshowlocationstate == 1) {
                                            if (floornub < 8) {
                                                var showtxt = "";
                                                showtxt += _this.addfloormarks(floornub);
                                                $("#showtext").html(showtxt);
                                            } else {
                                                _this.showlocation();
                                            }
                                        }
                                    }, 150 * floornub - start);
                                    }


                                }).start();
                            }, 500 * (floorindex-start + 1));
                        })(i);
                    }

                }
                
       });
     }
}

modelbusiness.prototype.dbclickfloor = function (clickobj) {
    console.log(clickobj);
    var modelnames = ["cm_dingweifloor_8", "cm_dingweifloor_7", "cm_dingweifloor_6", "cm_dingweifloor_5", "cm_dingweifloor_4", "cm_dingweifloor_3", "cm_dingweifloor_2", "cm_dingweifloor_1"];
    if (clickobj.name.indexof("cm_dingweifloor_") >= 0) {
        this.showfloor( parseint(clickobj.name.replace("cm_dingweifloor_", "")));
    }
}

 

 

由于篇幅原因，这一课先介绍到这里 

后面我将继续讲解用webgl 建立 3d园区 3d智慧小区 、室内定位、桥梁隧道三维应用炫酷效果等等

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