地图上画轨迹

src/components/Map.jsx

@@ -175,7 +175,20 @@ export default function CesiumMap({ realtimePosition, pathPoints = [], devices =
 			viewer.entities.remove(trackLineRef.current);
 		}
 
-		if (!points || points.length === 0) return;
+		// 2. 传入的 points 本身为空 → 清空轨迹退出
+		if (!points || points.length === 0) {
+			const viewer = viewerRef.current;
+			if (viewer) {
+				try {
+					if (trackLineRef.current) {
+						viewer.entities.remove(trackLineRef.current);
+						trackLineRef.current = null;
+					}
+				} catch (e) { }
+				viewer.scene.requestRender(); // 强制刷新！
+			}
+			return;
+		}
 
 		const validPoints = points.filter(p => {
 			const lon = Number(p.lon);