Whether the vertex is in the circle

1   ///   <Summary>  2           ///  Whether the vertex is in the circle (or in the circle on the edge)  3           ///   </Summary>  4           ///   <Param name = "cpoint">  Center Coordinate  </Param>  5           ///  <Param name = "cradius">  Circle radius  </Param>  6           ///   <Param name = "point">  Current point  </Param>  7           ///   <Returns> </returns>  8           Public   Static   Bool Whether the vertex is in the circle (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           ///  Whether the vertex is in the circle (or in the circle on the edge)  16           ///   </Summary>  17           ///   <Param name = "cpoint">  Center Coordinate  </Param>  18           ///  <Param name = "onpoint">  Coordinates on the edges  </Param>  19           ///   <Param name = "point">  Current point  </Param>  20           ///   <Returns> </returns>  21           Public   Static   Bool Whether the vertex is in the circle (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 }