boost::geometry::intersection wrong result about geometry

[jdmarsh]

I've had this issue using float and double. I only managed to solve it by moving to cpp_bin_float_quad in boost multiprecision but that's crazy slow and I can't guarantee that the issue isn't still going to crop up there as well, I just haven't seen it yet.

[jdmarsh]

I've had this issue crop up as well (1.82 and 1.83). It's not quite the same but I've added a repro of my problem here:
https://godbolt.org/z/W1s7YEczP
with the points plotted here:
https://www.desmos.com/calculator/zrytxj5d8u
The output line should be very small as it only intersects at a corner, but the output seems to be much much larger going outside of the bounds of the polygon.

[vissarion]

I can reproduce the issue. Probably a numerical issue. With double instead of float the results are as expected.

[vissarion]

@jdmarsh could you please open a new issue with your example and data?