gistfile1.txt

- (BOOL)isEqual:(id)object;
{
    if ( object == self ) {
        return YES;
    }
    
    if ( object == nil || ![object isKindOfClass:[self class]] ) {
        return NO;
    }
    
    BOOL xEqual = fabs( self.x - [object x] ) < .00001;
    BOOL yEqual = fabs( self.y - [object y] ) < .00001;

    return ( xEqual && yEqual );
}