Hi Barend,

On 12 February 2014 13:46, Barend Gehrels <barend@xs4all.nl> wrote:

Good. That warning can be ignored. It's a (more or less personal) development branch. Please comment it in cart_intersect.hpp if you want to get rid of it. I will fix this but it is, for me, diagnostic information

I suspected as much. Didn't want to keep any diagnostic info to myself ;-)

Ah, that is a known problematic side-effect. That has to be fixed too but of course, if you need it today, or even somewhere this week, I cannot do that.

Alas, then I'll have to wait a bit more.

You can try one more thing: please define BOOST_GEOMETRY_NO_ROBUSTNESS. It will than skip all rescaling-to-integer-for-robustness code. That sounds a bit weird, because this thread was to fix that. But besides the rescaling more enhancements have been made, so it might be that your code then runs OK. However, I cannot predict that, there are also cases which really need this rescaling. So you can try how it looks.

Unfortunately, that doesn't help. Then I get an empty result at some point - see the attached "exception.svg" file.

Besides that, maybe even better, you can try to call the function "geometry::remove_spikes" on your output. It hopefully will remove all spikes which are generated.

It appears that it doesn't, the spike is still there. I tried this without defining BOOST_GEOMETRY_NO_ROBUSTNESS, as the empty result I described occurs sooner than the generation of any spike.