点是否在圆内

 1 /// <summary>
 2         /// 点是否在圆内(在边上也认为在圆内)
 3         /// </summary>
 4         /// <param name="cPoint">圆心坐标</param>
 5         /// <param name="cRadius">圆半径</param>
 6         /// <param name="point">当前点</param>
 7         /// <returns></returns>
 8         public static bool 点是否在圆内(Vector2D cPoint, double cRadius, Vector2D point)
 9         {
10             double distance = Math.Sqrt(Math.Pow(Math.Abs(point.X - cPoint.X), 2) + Math.Pow(Math.Abs(point.Y - cPoint.Y), 2));
11             return distance <= cRadius;
12         }
13 
14         /// <summary>
15         /// 点是否在圆内(在边上也认为在圆内)
16         /// </summary>
17         /// <param name="cPoint">圆心坐标</param>
18         /// <param name="onPoint">圆边上坐标</param>
19         /// <param name="point">当前点</param>
20         /// <returns></returns>
21         public static bool 点是否在圆内(Vector2D cPoint, Vector2D onPoint, Vector2D point)
22         {
23             double cRadius = Math.Sqrt(Math.Pow(Math.Abs(onPoint.X - cPoint.X), 2) + Math.Pow(Math.Abs(onPoint.Y - cPoint.Y), 2));
24             double distance = Math.Sqrt(Math.Pow(Math.Abs(point.X - cPoint.X), 2) + Math.Pow(Math.Abs(point.Y - cPoint.Y), 2));
25             return distance <= cRadius;
26         }