优化RadarChart雷达图，增加多雷达图支持

Scripts/UI/Internal/LineStyle.cs

@@ -0,0 +1,55 @@
+
+using UnityEngine;
+
+namespace XCharts
+{
+    /// <summary>
+    /// The style of line.
+    /// 线条样式。
+    /// 注： 修改 lineStyle 中的颜色不会影响图例颜色，如果需要图例颜色和折线图颜色一致，需修改 itemStyle.color，线条颜色默认也会取改颜色。
+    /// </summary>
+    [System.Serializable]
+    public class LineStyle
+    {
+        /// <summary>
+        /// 线的类型。
+        /// </summary>
+        public enum Type
+        {
+            Solid,
+            Dashed,
+            Dotted
+        }
+        [SerializeField] private bool m_Show = true;
+        [SerializeField] private Type m_Type = Type.Solid;
+        [SerializeField] private Color m_Color;
+        [SerializeField] private float m_Width = 0.8f;
+        [SerializeField] [Range(0, 1)] private float m_Opacity = 1;
+
+        /// <summary>
+        /// Set this to false to prevent the areafrom showing.
+        /// 是否显示区域填充。
+        /// </summary>
+        public bool show { get { return m_Show; } set { m_Show = value; } }
+        /// <summary>
+        /// the type of line.
+        /// 线的类型。
+        /// </summary>
+        public Type type { get { return m_Type; } set { m_Type = value; } }
+        /// <summary>
+        /// the color of line, default use serie color.
+        /// 线的颜色。
+        /// </summary>
+        public Color color { get { return m_Color; } set { m_Color = value; } }
+        /// <summary>
+        /// the width of line.
+        /// 线宽。
+        /// </summary>
+        public float width { get { return m_Width; } set { m_Width = value; } }
+        /// <summary>
+        /// Opacity of the line. Supports value from 0 to 1, and the line will not be drawn when set to 0.
+        /// 线的透明度。支持从 0 到 1 的数字，为 0 时不绘制该图形。
+        /// </summary>
+        public float opactiy { get { return m_Opacity; } set { m_Opacity = value; } }
+    }
+}