This is a simple header-only library that allows reading GLTF files
containing 3D graphics content. This will be useful for 3D tiles support.
The library does not have any dependencies other than nlohmann's json
which we already have in the "external" directory.
Syncs some files with their counterparts from https://github.com/LibreCAD/libdxfrw
Basically this undoes the QGIS specific styling applied to these
files and excludes them from the astyle script. Apart from the
whitespace changes there's only very minor code modernization
changes.
But the goal here is to reduce the diffs between us and upstream
so that we can more easily push fixes upstream and pull them
downstream.
Laz-perf is a relatively "underground" library, and is not packaged
for many major distributions. Its also tiny and trivial to include with
the other external libraries.
This avoids requiring users who want point cloud support to have to
compile their own laz-perf
[FEATURE] fix#31575 mesh layer speed rendering improvements (LOD)
As mesh layer could have millions of triangles, rendering could be very slow, especially when all the triangles are displayed in the view whereas triangles are too small to be viewed.
For those situations QGIS has an option to simplify the mesh. Simplification leads to one or more simplified mesh that represents levels of detail (LOD). When rendering the mesh, the appropriate level of detail is chosen to have an adequate rendering depending on the view.
Turns out this index is MUCH (magnitudes) faster for use in pal. So
grab an updated version of the upstream library and place in external libs,
and use this for indices in pal.
(we should probably investigate whether this is faster for snapping and
other index use too!)
This library, original taken from https://github.com/sijk/qt-unix-signals
(but a maintained fork exists at https://github.com/nyalldawson/qt-unix-signals),
handles unix signal watching using the Qt libraries.
It allows for detection of signals like SIGINT and SIGTERM,
and allows Qt applications to respond gracefully to these.
Included in external libraries for use in QGIS terminal
applications.
A very fast static spatial index for 2D points based on a flat KD-tree,
using https://github.com/mourner/kdbush.hpp
Compared to QgsSpatialIndex, this index:
- supports single point features only (no multipoints)
- is static (features cannot be added or removed from the index after construction)
- is much faster!
- supports true "distance based" searches, i.e. return all points within a radius
from a search point
