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

Subject: [ggl] Re: Help needed with Intersection operation
From: Barend Gehrels (barend)
Date: 2011-09-06 13:55:20

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