继续骑行海图初始位置，地图属性调整

Assets/Scenes/Ride/Scripts/ChartDataSourceScript.cs

@@ -44,6 +44,22 @@ namespace Assets.Scenes.Ride.Scripts
         {
             return index - graph.HorizontalScrolling >= graph.DataSource.HorizontalViewSize / 2;
         }
+
+        public void InitHorizontalScrolling(int index)
+        {
+            var halfView = graph.DataSource.HorizontalViewSize / 2;
+            if (index >= halfView)
+            {
+                if (index + halfView >= mData.Count)
+                {
+                    graph.HorizontalScrolling = mData.Count - graph.DataSource.HorizontalViewSize;
+                }
+                else
+                {
+                    graph.HorizontalScrolling = index - halfView;
+                }
+            }
+        }
         bool VerifySorted(List<DoubleVector2> data)
         {
             if (data == null)