Re: [boost] GGL Review

Subject: Re: [boost] GGL Review
From: Brandon Kohn (blkohn_at_[hidden])
Date: 2009-11-16 14:23:05

Hartmut Kaiser wrote:
>> Brandon Kohn wrote:
> 
>> There
>> are many buggy floating point boolean op libraries out there. Why do we
>> need another?
> 
> I would like to ask you to refrain from spreading FUD with regards to the
> library under review without any concrete proof.
> 

I don't think this is a fair appraisal of my statements. It is common 
knowledge in computational geometry that floating point operations in 
boolean operations (orientation tests, intersections...) are inherently 
flawed and so in the absence of any proof by the authors that they have 
attempted to compensate I think it is justified to bring up these 
points. There has been some insinuation in recent posts that the GGL 
Boolean Ops could be used to perform floating point boolean operations 
as a proxy for Boost.Polygon. Such a usage would require that we know if 
  the implementation actually works. It wasn't intended as a personal 
attack on GGL.

Brandon