可视域分析

可视域分析需要额外调用接口，需要引用插件 ViewshedAnalysis.js 和 ViewshedAnalysis.css

<link href="SDK/Plugins/ViewshedAnalysis/ViewshedAnalysis.css"/>
<script src="SDK/Plugins/ViewshedAnalysis/ViewshedAnalysis.js"></script>

绘制可视域分析开始

    //初始化鼠标事件
    var ViewAnalysisHandler = new LSGlobe.ScreenSpaceEventHandler(viewer.scene.canvas);
    ViewAnalysisHandler.setInputAction(function(movement) {
            var cartesian = viewer.scene.pickGlobe(movement.position);
            var cartographic = LSGlobe.Cartographic.fromCartesian(cartesian);
            var currentClickLon = LSGlobe.Math.toDegrees(cartographic.longitude);
            var currentClickLat = LSGlobe.Math.toDegrees(cartographic.latitude);
            var CurrentTileSet = [tileset];
            //判断点是否在模型上函数和压平获取压平对象相同
            //可视域分析点必须在模型上
            if (CurrentTileSet.length < 1) {
                //如果点没有点在模型上不在向下走
                return;
            }
            if (cartesian != undefined && !viewshed3ding) {
                viewshed3d.viewerPosition = cartesian;
                //初始添加一个点
                viewshed3ding = true;
            } else {
                viewshed3d.setPoseByTargetPoint(cartesian);
                //点击第二个点绘制结束
                viewshed3ding = false;
            }
        },
        LSGlobe.ScreenSpaceEventType.LEFT_CLICK);

    ViewAnalysisHandler.setInputAction(function(movement) {
            if (viewshed3daction && viewshed3ding) {
                var cartesian = viewer.scene.pickGlobe(movement.endPosition);
                viewshed3d.setPoseByTargetPoint(cartesian);
            }
        },
        LSGlobe.ScreenSpaceEventType.MOUSE_MOVE);

删除可视域分析状态

 for (var i = 0; i < aViewshed3d.length; i++) {
        try {
            aViewshed3d[i].destroy();
        } catch(e) {}
    }
    aViewshed3d = [];
    viewshed3ding = false;

示例代码 code

code示例地址