function addGltf(url, lng, lat, height, heading , pitch , roll, scale , id) {

	// var modelMatrix = Cesium.Transforms.eastNorthUpToFixedFrame(Cesium.Cartesian3.fromDegrees(lng, lat, height));
	var model = viewer.scene.primitives.add(Cesium.Model.fromGltf({
		url: url,        //如果为bgltf则为.bgltf
		// modelMatrix: modelMatrix,
		scale: scale,  //放大倍数
		heightReference:Cesium.HeightReference.CLAMP_TO_GROUND,
		id : id,
		shadows : Cesium.ShadowMode.ENABLED,
		distanceDisplayCondition:new Cesium.DistanceDisplayCondition(0.0, 5000.0),
		color:Cesium.Color.fromAlpha(Cesium.Color.WHITE, 1),
		colorBlendMode:Cesium.ColorBlendMode.HIGHLIGHT
		
	}));

	var params= {
		tx: lng,  //模型中心X轴坐标（经度，单位：十进制度）
		ty: lat,    //模型中心Y轴坐标（纬度，单位：十进制度）
		tz: height,    //模型中心Z轴坐标（高程，单位：米）
		rx: heading,    //X轴（经度）方向旋转角度（单位：度）
		ry: pitch,    //Y轴（纬度）方向旋转角度（单位：度）
		rz: roll ,     //Z轴（高程）方向旋转角度（单位：度）
		scale: scale
	};

	model.type = "model"; 
	model.tx = lng;
	model.ty = lat;
	model.tz = height;
	model.rx = heading;
	model.ry = pitch;
	model.rz = roll;
	update3dtilesMaxtrix(model,params);

}

//根据id获取 对象
function getprimitiveModel(id){
    var primitives = viewer.scene.primitives;
    for (var i = 0; i < primitives.length; i++) {
        var primitive = primitives.get(i);
		if (typeof(primitive._id)!=='undefiend' && primitive._id == id) {
				return primitive;
        }
    }
}
function delprimitiveModel(id){
	var primitives = viewer.scene.primitives;
    for (var i = 0; i < primitives.length; i++) {
        var primitive = primitives.get(i);
		if (typeof(primitive._id)!=='undefiend' && primitive._id == id) {
			viewer.scene.primitives.remove(primitive);
		}
	}
}
function getentityModel(id){
    var entities = viewer.entities;
	return entities.getById(id);
}
function delentityModel(id){
	var entities = viewer.entities;
	return entities.removeById(id);
}
function get3DTile(tilesetid,title){
	if(base3dtilesPrimitives.length==0){
		return undefined;
	}else{
		var primitive = undefined;
		for(let i in base3dtilesPrimitives){
			if(tilesetid==base3dtilesPrimitives[i]._id){
				primitive = base3dtilesPrimitives[i];
			}
		}
		var objs = undefined;
		for(let i in primitive.root.children){
			// if(primitive.root.children[i].children[0]._content.batchTable._properties.名称 == title){
			if(primitive.root.children[i]._header.content.url == title){
				objs = primitive.root.children[i];
			}
		}
		return objs instanceof Cesium.Cesium3DTile?objs:undefined;
	}
}
function get3DTileSet(id){
	if(base3dtilesPrimitives.length==0){
		return undefined;
	}else{
		var primitive = undefined;
		for(let i in base3dtilesPrimitives){
			if(id==base3dtilesPrimitives[i]._id){
				primitive = base3dtilesPrimitives[i];
			}
		}
		return primitive instanceof Cesium.Cesium3DTileset?primitive:undefined;
	}
}
//更新模型
function update3dtilesMaxtrix(model,params) {
	model.scale=params.scale;
	//旋转
	var mx = Cesium.Matrix3.fromRotationX(Cesium.Math.toRadians(params.rx));
	var my = Cesium.Matrix3.fromRotationY(Cesium.Math.toRadians(params.ry));
	var mz = Cesium.Matrix3.fromRotationZ(Cesium.Math.toRadians(params.rz));
	var rotationX = Cesium.Matrix4.fromRotationTranslation(mx);
	var rotationY = Cesium.Matrix4.fromRotationTranslation(my);
	var rotationZ = Cesium.Matrix4.fromRotationTranslation(mz);
	//平移
	var position = Cesium.Cartesian3.fromDegrees(params.tx, params.ty, params.tz);
	var m = Cesium.Transforms.eastNorthUpToFixedFrame(position);
	//旋转、平移矩阵相乘
	Cesium.Matrix4.multiply(m, rotationX, m);
	Cesium.Matrix4.multiply(m, rotationY, m);
	Cesium.Matrix4.multiply(m, rotationZ, m);
	//赋值给model
	model.modelMatrix = m;
}


function update3dtilesMaxtrix2(model,params) {
	//平移
	var position = Cesium.Cartesian3.fromDegrees(params.tx, params.ty, params.tz);
	var m = Cesium.Transforms.eastNorthUpToFixedFrame(position);

	//赋值给model
	model.modelMatrix = m;
}