[feature] Add smoothLimit for Line

CHANGELOG.md

@@ -59,6 +59,7 @@
 
 ## master
 
+* (2022.09.10) 增加`Line`的`SmoothLimit`可控制平滑曲线不同效果
 * (2022.09.05) 修复`Serie`隐藏时`Tooltip`还显示信息的问题
 * (2022.09.30) 修复`Chart`在很小尺寸时出现`DivideByZeroException`异常
 

Editor/Series/LineEditor.cs

@@ -18,6 +18,10 @@ namespace XCharts.Editor
                 PropertyField("m_YAxisIndex");
             }
             PropertyField("m_LineType");
+            if (serie.lineType == LineType.Smooth)
+            {
+                PropertyField("m_SmoothLimit");
+            }
             //PropertyField("m_Clip");
             PropertyFiledMore(() =>
             {

Runtime/Serie/Line/LineHelper.cs

@@ -505,7 +505,7 @@ namespace XCharts.Runtime
                 if (isY)
                     UGLHelper.GetBezierListVertical(ref s_CurvesPosList, sp, ep, smoothness, setting.lineSmoothStyle);
                 else
-                    UGLHelper.GetBezierList(ref s_CurvesPosList, sp, ep, lsp, nep, smoothness, setting.lineSmoothStyle, true);
+                    UGLHelper.GetBezierList(ref s_CurvesPosList, sp, ep, lsp, nep, smoothness, setting.lineSmoothStyle, serie.smoothLimit);
                 for (int j = 1; j < s_CurvesPosList.Count; j++)
                 {
                     serie.context.drawPoints.Add(new PointInfo(s_CurvesPosList[j], ignore));

Runtime/Serie/Serie.cs

@@ -247,6 +247,7 @@ namespace XCharts.Runtime
         [SerializeField] private float m_SampleAverage = 0;
 
         [SerializeField] private LineType m_LineType = LineType.Normal;
+        [SerializeField][Since("v3.3.1")] private bool m_SmoothLimit = true;
         [SerializeField] private BarType m_BarType = BarType.Normal;
         [SerializeField] private bool m_BarPercentStack = false;
         [SerializeField] private float m_BarWidth = 0;
@@ -492,6 +493,16 @@ namespace XCharts.Runtime
             set { if (PropertyUtil.SetStruct(ref m_LineType, value)) SetVerticesDirty(); }
         }
         /// <summary>
+        /// Whether to restrict the curve. When true, the curve between two continuous data of the same value 
+        /// is restricted to not exceed the data point, and is flat to the data point.
+        /// |是否限制曲线。当为true时，两个连续相同数值的数据间的曲线会限制为不超出数据点，和数据点是平直的。
+        /// </summary>
+        public bool smoothLimit
+        {
+            get { return m_SmoothLimit; }
+            set { if (PropertyUtil.SetStruct(ref m_SmoothLimit, value)) { SetVerticesDirty(); } }
+        }
+        /// <summary>
         /// the min pixel dist of sample.
         /// |采样的最小像素距离，默认为0时不采样。当两个数据点间的水平距离小于改值时，开启采样，保证两点间的水平距离不小于改值。
         /// </summary>