cesium之三维漫游飞行效果实现篇

本篇实现cesium三维漫游飞行效果,效果图如下:

实现的思路如下:

1.初始化函数:

Init:function(cesium,drawHelper){
        this.cesium = cesium; //cesium对象
        this.drawHelper = drawHelper;//drawHelper对象
        this.InitEvent();
        this.loadData();
},

三维漫游的初始化参数cesium、drawHelper,其中cesium是cesium创建对象,drawHelper是绘制工具创建对象;InitEvent()界面监听事件;loadData()漫游列表信息

2.漫游路线列表信息:

loadData:function () {
        //请求三维漫游轨迹
        $.ajax({
            url: "/information/fly/queryAll",
            type: 'post',
            async: true,//异步
            dataType: 'json',
            success: function (data) {
                var html=''
                if (data.length>0) {
                    for(var i=0;i<data.length;i++){
                        var flydata=data[i];
                        html+='<tr>'+
                            // '<td><input type="checkbox" name="FLYNAME" id="'+flydata.id+'" style="cursor: pointer;" onchange=""></td>'+
                            '<td><a style="color:#fff;text-decoration:none;font-size:12px;">'+flydata.name+'</a></td>'+
                            '<td><button class="btn btn-default btn-xs" style="color:#fff;">飞行</button></td>'+
                            '<td><button class="btn btn-default btn-xs" style="color:#fff;">修改</button></td>'+
                            '<td><button class="btn btn-default btn-xs" style="color:#fff;">删除</button></td>'+
                            "<td><a style='color:black;text-decoration:none;font-size:13px;'>" + flydata.id + "</a></td>" +
                            "<td><a style='color:black;text-decoration:none;font-size:13px;'>" + flydata.geojson + "</a></td>" +
                            "<td><a style='color:black;text-decoration:none;font-size:13px;'>" + flydata.position + "</a></td>" +
                            "<td><a style='color:black;text-decoration:none;font-size:13px;'>" + flydata.orientation + "</a></td>" +
                            '</tr>';
                    }
                    $("#overFly_table tbody").html(html);
                    $('#overFly_table').find('td:eq(4)').hide();//隐藏id字段列
                    $('#overFly_table').find('td:eq(5)').hide();//隐藏geojson字段列
                    $('#overFly_table').find('td:eq(6)').hide();//隐藏position字段列
                    $('#overFly_table').find('td:eq(7)').hide();//隐藏orientation字段列
                    //表格---行点击事件
                    bxmap.FlyCesium.flyTableOnclick();
                }
                else {
                }
            }
        });
    }

3.监听事件:

(1)开始飞行:

//开始飞行
$("#start_Fly3DPaths").click(function(){
    bxmap.FlyCesium.cesium.showFly3DPaths(bxmap.FlyCesium.draw3DObj);
});
/**
* 飞行漫游路径
 * @method showFly3DPaths
* @param  pathsData 飞行路径信息,格式如下:{"orientation":{"heading":2.411783930363565,"pitch":-0.21097267398444197,"roll":0.0015622392231300353},"position": {"x":-2206260.239730831,"y":5510911.392077349,"z":2331987.10863007}, "geometry":{"type": "LineString", "coordinates": [[101.80089882736969, 26.60700234866561], [101.80082205161088, 26.607156056057718]]} }
* @param  position 飞行路径跳转位置
* @return
*/
function computeCirclularFlight() {
                    var property = new Cesium.SampledPositionProperty();
                    for (var i = 0; i < position.length; i++) {
                        if (i == 0) {
                            var time = Cesium.JulianDate.addSeconds(start, i, new Cesium.JulianDate());
                            //var _position = Cesium.Cartesian3.fromDegrees(position[i].x, position[i].y, 1170);
                            var _position = Cesium.Cartesian3.fromDegrees(position[i].x, position[i].y, 0);
                            property.addSample(time, _position);
                        }
                        if (i < 10000 && i > 0) {
                            var position_a = new Cesium.Cartesian3(property._property._values[i * 3 - 3], property._property._values[i * 3 - 2], property._property._values[i * 3 - 1]);
                            if (i < 976) {
                                //var _position = Cesium.Cartesian3.fromDegrees(position[i].x, position[i].y, 1170);
                                var _position = Cesium.Cartesian3.fromDegrees(position[i].x, position[i].y, 0);
                            }
                            else if (i > 975 && i < 986) {
                                //var _position = Cesium.Cartesian3.fromDegrees(position[i].x, position[i].y, 1170 + 20 * (i - 980));
                                var _position = Cesium.Cartesian3.fromDegrees(position[i].x, position[i].y, 0);
                            }
                            else if (i > 985) {
                                //var _position = Cesium.Cartesian3.fromDegrees(position[i].x, position[i].y, 1170 + 200);
                                var _position = Cesium.Cartesian3.fromDegrees(position[i].x, position[i].y, 0);
                            }

                            var positions = [Cesium.Ellipsoid.WGS84.cartesianToCartographic(position_a), Cesium.Ellipsoid.WGS84.cartesianToCartographic(_position)];
                            var a = new Cesium.EllipsoidGeodesic(positions[0], positions[1]);
                            var long = a.surfaceDistance;
                            var _time = long/50;
                            var time = Cesium.JulianDate.addSeconds(property._property._times[i - 1], _time, new Cesium.JulianDate());
                            property.addSample(time, _position);
                        }
                    }
                    return property;
}

(2)暂停飞行:

//暂停飞行
$("#pause_Fly3DPaths").click(function(){
            bxmap.FlyCesium.cesium.pauseFly3DPaths();
});

(3)向前飞行:

//向前飞行
$("#playForward_Fly3DPaths").click(function(){
            bxmap.FlyCesium.cesium.playForwardFly3DPaths();
});

(4)向后飞行:

//向后飞行
$("#playReverse_Fly3DPaths").click(function(){
            bxmap.FlyCesium.cesium.playReverseFly3DPaths();
});

(5)退出飞行:

//退出飞行
$("#stop_Fly3DPaths").click(function(){
            $("#cesiumFly3DPaths").click();
            bxmap.FlyCesium.cesium.stopFly3DPaths();
});

(6)设定路线:

//设定路线
$("#draw_Fly3DPaths").click(function(){
 if(!bxmap.FlyCesium.drawHelper){
                bxmap.FlyCesium.drawHelper = new DrawHelper(bxmap.FlyCesium.cesium.cesiumViewer);
            }
  bxmap.FlyCesium.draw3DObj = bxmap.FlyCesium.cesium.DrawFly3DPaths(bxmap.FlyCesium.drawHelper);
});

(7)保存路线

var draw3DObj=JSON.stringify(bxmap.FlyCesium.draw3DObj); //将JSON对象转化为JSON字符
var TbFly={name:$("#FlyAdd_name").val(),geojson:draw3DObj};
//保存三维漫游轨迹
$.ajax({
 url: GLOBAL.domainRest + "/information/fly/saveOrUpdate",
 type: 'post',
 async: true,//异步
 dataType: 'json',
 data:TbFly,
 success: function () {
     $("#overFlyClick").click();
     jDialog.dialog({
           title: "提示信息",
           modal: true,// 非模态,即不显示遮罩层
           autoClose: 1000,
           content: "保存成功"
      });
      dialog.close();
     bxmap.FlyCesium.cesium.clearFly3DPaths();
                                    }
});

 

作者: GIS之家

GIS之家微信号:gishome;GIS之家拥有自己的GIS开发团队,均是高校GIS研究生,具备丰富的webgis开发项目工作经验,专注以及热爱研究webgis技术的团队

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