Question

三维尾迹线绘制完成后，尾迹线没有运动，只有在地图滚动缩放的时候尾迹线才有短暂的运动，并且占用掉了电脑大量运行内存（不绘制尾迹线不会出现这个问题）。地图中其他内容添加了地形、三维管道、一些模型图标等。代码写法如下，请问各位有办法遇到过类似无操作情况下尾迹线无法运动的问题吗

const draw_primitive_line = (Cesium, viewer, data) => {
	data.pipe_vertices.forEach((item, index) => {
		let startNode = data.pipe_startNode[index];
		let endNode = data.pipe_endNode[index];
		const endNodeIndex = data.junction_id.findIndex(item => item == endNode);
		const startNodeIndex = data.junction_id.findIndex(item => item == startNode);
		viewerMap.entities.add({
			polyline: {
				positions: Cesium.Cartesian3.fromDegreesArrayHeights(handleData(item, startNodeIndex, endNodeIndex)),
				width: 2,
				// clampToGround: true,
				material: new Cesium.PolylineTrailMaterialProperty({
					// 尾迹线材质
					color: Cesium.Color.RED, //尾迹线颜色
					trailLength: 0.2, //尾迹线长度
					period: 10.0 //终点到起点的运行周期
				})
			}
		});
	});
	// initLineObj.value = viewer.scene.primitives.add(primitive_line_list);
	function handleData(data1, startNodeIndex, endNodeIndex) {
		let arr = [];
		data1.forEach((item, idx) => {
			let height = 0;
			if (idx === 0) {
				height = data.junction_elev[startNodeIndex] || 0;
			} else {
				height = data.junction_elev[endNodeIndex] || 0;
			}
			arr.push(item[1], item[0], height + 1);
		});
		return arr;
	}
};

Answer 1

目前暂无该情况的发生，您可以了解一下轨迹线的基本原理，通过结尾的示例上去审视这个情况

https://blog.csdn.net/supermapsupport/article/details/126959030