cesium使用gltf模型和gltf模型文件夹

gltf模型以文件夹形式存放，内部有纹理图片文件夹和gltf文件，gltf文件以相对路径请求该文件夹下的资源。
注意存放路径
cesium使用时，可以使用entity和Cesium.Model.fromGltf

建议使用前者

1.www.cnblogs.com/Haiszu/p/12…

var z= new Array('./src/1.gltf', './src/2.gltf','./src/3.gltf' );
var model,modelin,modelroot;
var modelMatrix = Cesium.Transforms.eastNorthUpToFixedFrame(Cesium.Cartesian3.fromDegrees(经度, 纬度,1));        //gltf数据加载位置——中点
//加载gltf格式数据到cesium，z为模型名称，modelMatrix为模型中心点的经纬度坐标
function model_add(url){
/*        let index = url.lastIndexOf("/"); // lastIndexOf("/")  找到最后一个  /  的位置
        let fileName = url.substr(index + 1); // substr() 截取剩余的字符，即得文件名xxx.doc*/
        model=scene.primitives.add(Cesium.Model.fromGltf({
            url : url,        //如果为bgltf则为.bgltf
            modelMatrix : modelMatrix,
            scale : 0.001,  //放大倍数
        }));
        /*获取3D model 的旋转矩阵modelMatrix*/
        let m = model.modelMatrix;
        //构建一个三阶旋转矩阵。模型旋转一定的角度，fromRotation[Z]来控制旋转轴，toRadians()为旋转角度，转为弧度再参与运算
        let m1 = Cesium.Matrix3.fromRotationZ(Cesium.Math.toRadians(-78));
        //矩阵计算
        Cesium.Matrix4.multiplyByMatrix3(m,m1,m);
        //将计算结果再赋值给modelMatrix
        model.modelMatrix = m;
}
function mode3D_play(checkbox){
    if(checkbox.checked==true){
        model.show=true;
    }else{
        model.show=false;
    }
}
for(let i=0;i<z.length;i++){
    model_add(z[i]);
}

function createPlanes(info) {
    var planeEntities = [];
    for (var i = 0; i < info.length; i++) {
      var position = Cesium.Cartesian3.fromDegrees(
        info[i][0],
        info[i][1],
        info[i][2]
      );
      var heading = Cesium.Math.toRadians(info[i][3]);
      var pitch = 0;
      var roll = 0;
      var hpr = new Cesium.HeadingPitchRoll(heading, pitch, roll);
      var orientation = Cesium.Transforms.headingPitchRollQuaternion(
        position,
        hpr
      );
      var descriptionHTML = "";
      descriptionHTML +=
        "<p>" + (p.lon[0].display || p.lon[0].name) + ":" + info[i][0] + "</p>";
      descriptionHTML +=
        "<p>" + (p.lat[0].display || p.lat[0].name) + ":" + info[i][1] + "</p>";
      descriptionHTML +=
        "<p>" +
        (p.height[0].display || p.height[0].name) +
        ":" +
        info[i][2] +
        "</p>";
      descriptionHTML +=
        "<p>" +
        (p.head[0].display || p.head[0].name) +
        ":" +
        info[i][3] +
        "</p>";
      var minimumPixelSize = 80;
      var maximumScale = 4000;
      if (
        audioList[info[i][6]] ==
        adress + "/api/rest//upload/web/gltfs/towers/scene.gltf"
      ) {
        minimumPixelSize = 40;
        maximumScale = 1700;
      }
      var entity = viewer.entities.add({
        name: info[i][4],
        position: position,
        orientation: orientation,

        model: {
          uri: audioList[info[i][6]],
          minimumPixelSize: minimumPixelSize, //最小的模型像素
          maximumScale: maximumScale, //最大的模型像素
          runAnimations: true, //是否显示动画
          clampAnimations: true, //是否保持最后一针的动画
          //color:Cesium.Color.RED,//颜色
          color: Cesium.Color.fromAlpha(Cesium.Color.RED, parseFloat(1.0)), //包含透明度的颜色
          colorBlendMode: Cesium.ColorBlendMode["MIX"], //常用的有三个HIGHLIGHT,REPLACE,MIX
          colorBlendAmount: 0.1, //这个属性必须是MIX混合属性才能生效,见colorBlendMode
        },
        description: descriptionHTML,
      });
      planeEntities.push(entity);
      // var PolylineTrailBase = viewer.entities.add({
      //   name: "line",
      //   polyline: {
      //     show: true,
      //     positions: Cesium.Cartesian3.fromDegreesArrayHeights(info[i][5]),
      //     width: 3,
      //     material: Cesium.Color.RED.withAlpha(1),
      //   },
      // });
      if(info[i][5]!=-2){
        var PolylineTrail = viewer.entities.add({
          name: "line:" + info[i][4],
          polyline: {
            show: true,
            positions: Cesium.Cartesian3.fromDegreesArrayHeights(info[i][5]),
            width: 2,
            material: makeColor(i),
          },
        });
        planeEntities.push(PolylineTrail);
      }
     
    }
    return planeEntities;
  }

audioList数组为gltf文件路径数组。