增加PolarChart极坐标图表

Runtime/API/PolarChart_API.cs

@@ -0,0 +1,30 @@
+/******************************************/
+/*                                        */
+/*     Copyright (c) 2018 monitor1394     */
+/*     https://github.com/monitor1394     */
+/*                                        */
+/******************************************/
+
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace XCharts
+{
+    public partial class PolarChart
+    {
+        /// <summary>
+        /// 极坐标。
+        /// </summary>
+        public Polar polar { get { return m_Polar; } }
+        /// <summary>
+        /// Angle axis of Polar Coordinate.
+        /// 极坐标系的角度轴。
+        /// </summary>
+        public AngleAxis angleAxis { get { return m_AngleAxis; } }
+        /// <summary>
+        /// Radial axis of polar coordinate.
+        /// 极坐标系的径向轴。
+        /// </summary>
+        public RadiusAxis radiusAxis { get { return m_RadiusAxis; } }
+    }
+}