当ThreeLayer使用InstancedMesh创建实体时，会导致ShapeLayer不可见

https://mapv.baidu.com/gl/examples/editor.html#threejs-camera.html //替换示例为如下代码
var map = new window.BMapGL.Map('map_container');

map.setTilt(47);
var projection = mapvgl.MercatorProjection;
var point = projection.convertLL2MC(new BMapGL.Point(106.542353,29.565448));
var point2 = projection.convertLL2MC(new BMapGL.Point(106.542353,29.565448));

map.centerAndZoom(new BMapGL.Point(106.542353,29.565448), 13);

map.enableKeyboard();
map.enableScrollWheelZoom();
map.enableInertialDragging();
map.enableContinuousZoom();

var view = new mapvgl.View({
    map: map
});

var threeLayer = new mapvgl.ThreeLayer();
view.addLayer(threeLayer);

//创建ShapeLayer
    fetch('./static/chongqing.json').then(function (rs) {
        return rs.json();
    }).then(function (rs) {
        var data = rs;
        var polygons = [];
        var len = data.length;
        for (var i = 0; i < len; i++) {
            var line = data[i];
            var polygon = [];
            var pt = [line[1] * 512, line[2] * 512];
            for (var j = 3; j < line.length; j += 2) {
                pt[0] += line[j] / 100 / 2;
                pt[1] += line[j + 1] / 100 / 2;
                polygon.push([pt[0], pt[1]]);
            }

            if (Math.random() > 0.5) {
                polygons.push({
                    geometry: {
                        type: 'Polygon',
                        coordinates: [polygon]
                    },
                    properties: {
                        height: line[0] / 2
                    }
                });
            }

        }

        var shapeLayer = new mapvgl.ShapeLayer({
            color: 'rgba(194, 147, 75, 0.8)', // 柱状图颜色
            enablePicked: true, // 是否可以拾取
            selectedIndex: -1, // 选中项
            selectedColor: '#ee1111', // 选中项颜色
            autoSelect: true, // 根据鼠标位置来自动设置选中项
            onClick: (e) => { // 点击事件
                console.log(e);
            },
        });
        view.addLayer(shapeLayer);
        shapeLayer.setData(polygons);
     });

var geometry = new THREE.BoxGeometry(20, 20, 20);
var material =  new THREE.MeshBasicMaterial( { color: 0x0000ff, flatShading: true, wireframe: false } );
//var cube = new THREE.Mesh(geometry, material);
//cube.position.z = 10;

//以下代码创建InstancedMesh后导致ShapeLayer不可见
  var z = 0;
  var mesh =  new THREE.InstancedMesh(geometry, material, 6);
  for (var xt = 0; xt < 6; xt++) {
    var matrix = mesh.matrixWorld.clone();
    matrix.setPosition(0, 0, z);
     mesh.setMatrixAt(xt, matrix);
    z += 50;
}
threeLayer.add(mesh, point2);
huiyan-fe / mapvgl

当ThreeLayer使用InstancedMesh创建实体时，会导致ShapeLayer不可见 #107
