@ Pure public int getPointCountInGroup ( int groupIndex ) { if ( groupIndex == 0 && this . pointCoordinates == null ) { return 0 ; } final int firstInGroup = firstInGroup ( groupIndex ) ; final int lastInGroup = lastInGroup ( groupIndex ) ; return ( lastInGroup - firstInGroup ) / 2 + 1 ; }
Replies the count of points in the specified group .