checks if the y coordinate is zero . concode_field_sep double x concode_elem_sep double y concode_field_sep double getX concode_elem_sep double squareDist concode_elem_sep double getY concode_elem_sep int hashCode concode_elem_sep boolean equals concode_elem_sep boolean isXZero concode_elem_sep double dot concode_elem_sep boolean isZero concode_elem_sep String toString
boolean function ( ) { return DoubleUtils . equalsEps ( y , 0.0 ) ; }