## Summary of Changes
As reported in #7868 the function `CGAL::IO::write_PLY()` used in binary
mode does not correctly write the coordinates if the points are from a
kernel with exact constructions.
~~This PR applies `to_double()" to the coordinates.~~
~~After a discussion with @MaelRL we decided that the user is in charge
to pass a `vertex_point_map` as named parameter that does the
conversion. This is straightforward as we offer the
[`Cartesian_converter_property_map`](https://doc.cgal.org/latest/Property_map/structCGAL_1_1Cartesian__converter__property__map.html).~~
Moving back to the previous proposal: hardcode some to_double and
to_float casts such that we meet the requirements of the file format,
whatever the input.
As the problem is the same for the vertex normals we add a named
parameter `vertex_normal_map`.
### Todo
- [x] Fix the generic function `write_polygon_mesh()`. Currently it is
fixed for `Surface_mesh`
## Release Management
* Affected package(s): Stream_support
* Issue(s) solved (if any): fix#7868 and fix
https://github.com/CGAL/cgal/issues/7327
* License and copyright ownership: unchanged
* upcoming integration, update #9072 and test it
## Summary of Changes
The `read_..._WKT()` functions have `bool` as return type, but currently
only check if the stream is bad, which is not the case if no input was
read.
This PR was triggered by the fact that CGALlab could not WTK files with
polygons, but only polylines. It now can read polygons, but does only
draw the contours and not the interior.
## Release Management
* Affected package(s): Stream_support
* License and copyright ownership: unchanged
## Summary of Changes
### Todo
In the issue I had questions to @soesau and @janetournois
## Release Management
* Affected package(s):
* Issue(s) solved (if any): fix#9039
* License and copyright ownership: unchanged
## Summary of Changes
Add a new package computing the approximate Fréchet distance between two
polylines in dD under Euclidean metric, or decides if the distance is
smaller than a given value.
## Release Management
* Affected package(s): Frechet_distance
* Feature (if any):
[link](https://cgal.geometryfactory.com/CGAL/Members/wiki/Features/Frechet_Distance)
* License and copyright ownership: MPI, GeometryFactory, cnrs(?)
## TODO:
- [x] check branch size (@sloriot)
- [x] Make it work with `Epick_d<Dimension_tag<2>>` @sloriot
Sébastien Loriot
Andreas Fabri
Mael Rouxel-Labbé
Sven Oesau
Laurent Rineau
Yliess Bellargui
albert-github
Jane Tournois