Thanks for the update. I think I found a bug now. A lookup with 
Grid2D.ANY should return at least the same locations as Grid2D.CENTER, 
as far as I understand. But this does not work if a value smaller 
sqrt(0.5) is passed as dist. ANY will return 0 locations then, but 
CENTER returns 1 (the origin), which is correct and should be reported 
by ANY as well.

You can also look at the attached JUnit test.

Best regards,
Christian

On 15.09.2015 18:32, Sean Luke wrote:
> Agreed.  I just updated them to do that.  See the respository.
>
> Sean
>
> On Sep 15, 2015, at 9:42 AM, Christian Meyer <[log in to unmask]> wrote:
>
>> Hi all,
>>
>> in Grid2D interface getRadialLocations is defined with a double value for 'dist'. But getRadialNeighbors in all implementing classes uses an int for 'dist', although the value is only passed.
>>
>> Implementing classes should accept double values in getRadialNeighbors as well.
>>
>> Best regards,
>> Christian