cesium加载飞机模型，entity方式和primitive方式加载，缩放至模型处

    
    
    
    
    
    
    
    
    





//primitive方式加载
    var modelMatrix = Cesium.Transforms.eastNorthUpToFixedFrame(
        Cesium.Cartesian3.fromDegrees(-75.62898254394531, 40.02804946899414, 0.0));
    var model = scene.primitives.add(Cesium.Model.fromGltf({
        url : './Apps/SampleData/models/CesiumAir/Cesium_Air.gltf',
        modelMatrix : modelMatrix,
        scale : 200.0,

    }));
    // Cesium.when(model.readyPromise).then(function(model) {
    //     model.activeAnimations.addAll({
    //         loop : Cesium.ModelAnimationLoop.REPEAT
    //     });
    // });
//通过viewer设置镜头，飞行至实体位置
    viewer.camera.setView({
        destination : Cesium.Cartesian3.fromDegrees(-75.62898254394531, 40.02804946899414, 0.0)
    });
    //viewer.zoomTo([-75.62898254394531, 40.02804946899414,0]);