Geometry Boost List: [ggl] Re: Help needed with Intersection operation

Subject: [ggl] Re: Help needed with Intersection operation
From: Barend Gehrels (barend)
Date: 2011-10-13 02:19:29

Hi Christoph,

OK, great to hear.

Regards, Barend

On 12-10-2011 2:22, Christoph Keller wrote:
> Hello Barend,
>
> Thanks for that fix.
>
> It works for me and I am pretty happy the Geometry module is in boost. 
> I did not have other errors and the one I had did not occur again.
>
> Thanks!
> Christoph
>
> On 09/06/2011 07:17 PM, Barend Gehrels wrote:
>> Hi Christoph,
>>
>>> The difference between integer and ttmath is that if we look at the 
>>> original test case and substract B from A (lets call the result C) 
>>> and then intersect C with B, then no precision would have avoided 
>>> this kind of numerical problem. (The problem is that a point from B 
>>> is very near the border of C in the order of epsilon). With integer 
>>> we get some rounding error in each operation(I can live with that). 
>>> It is ok, if I get a very small triangle from the intersecton 
>>> operation, that can be thrown away.
>>>
>>> This whole series of operations is a bit strange anyway.
>>>
>>> Thanks for all your effort.
>>
>> You are welcome ;-)
>>
>> Just curious if you tested the fix I submitted, is your problem now 
>> solved with that, or did you select another way and did not test (I 
>> can imagine that as well).
>>
>> Regards, Barend
>>
>>
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-- 
Barend Gehrels
http://about.me/barendgehrels