Vissarion Fisikopoulos

I think it is OK to stay as is until the strategies are documented and properly linked as available strategies in the algorithm documentation. Also note that recently set operations...

Thanks for noticing. Could you please add a minimal example to reproduce this behaviour.

It probably discards the 3rd coordinate and computes the convex hull of the projection in the first two. However, the user should be notified for this behaviour. This notification should...

Hi @Siddharth-coder13, sure you can create an PR on 3D convex hull algorithm and discuss the details there.

Indeed, as @barendgehrels note the output of 3D convex hull cannot be just an ordered list (opposed to 2D) so you need a new geometry. For `volume` things could be...

Indeed, as @barendgehrels note the output of 3D convex hull cannot be just an ordered list (opposed to 2D) so you need a new geometry. So an alternative starting point...

You can start by reading the OGC standard, and see how this is done in postGIS. On Thu, Dec 24, 2020, 12:45 Siddharth Kumar wrote: > @vissarion will you please...

> Hey, @vissarion, @barendgehrels I am interested in implementing `volume` for 3d pointsets. Is that already done? If not could I work on the same? @ayushgupta138 do you have a...

>Since @Siddharth-coder13 is working on volume implementation, @vissarion can I work on surface area and distance implementation for 3d pointsets after #789 is merged? The implementation of surface area would...

This is most probably caused by the [`epsilon_equals_policy`](https://github.com/boostorg/geometry/commit/e38c093b5d8d1a76f32e1e92e10c39d64054a7c6#diff-fc187ebce47d2e8ed80562f60ef0adc96392bd142970571dd6f86caa60855a9aR36) that treats almost collinear points as collinear. By using the [`fp_equals_policy`](https://github.com/boostorg/geometry/commit/e38c093b5d8d1a76f32e1e92e10c39d64054a7c6#diff-fc187ebce47d2e8ed80562f60ef0adc96392bd142970571dd6f86caa60855a9aR36) the result should be as expected. Note that [`eps_policy`](https://github.com/boostorg/geometry/commit/e38c093b5d8d1a76f32e1e92e10c39d64054a7c6#diff-0ac1ae6884f5b879c1fb14cc37a7b94c464364c9480c04ef2f75f27399601ce7L56) was also...