vsgCs 1.0.0 released

[timoore]

I wanted to share this announcement to vsgCs discussions.

I'm very happy to announce the 1.0.0 release of vsgCs. The last sort-of-official release, 0.4, was almost two years ago. Since then, there have been some changes and bug fixes:

Breaking Changes

• vsgCs now requires C++20. This is driven by Cesium Native's requirements, and we are leaning into it. The main visible change is that gsl::span has been replaced with std::span.
• The csclient program has been removed.

Additions

• The official release of Cesium Native, at this time v0.47.0, is used. Previously vsgCs used a fork of Cesium Native.
• vsgCs now sends identifying headers with http requests.
• The control key works as a modifier in the manipulator.
• vsgCs now uses vcpkg to manage its dependencies, including VSG and, via an overlay port, Cesium Native.
• Added Basic github CI actions.
• Arguments to the worldviewer program have been greatly simplified. WorldNode files no longer require flags. Local and remote 3D Tilesets can be specified directly on the command line.
• The glTF EXT_mesh_gpu_instancing extension is supported. As a result, 3D Tiles .i3dm files are now supported too.
• A World Anchor node, which places the world in a local coordinate frame, is added.
• vsgCs can now load glTF i.e., .gltf and .glb files. The new gltfviewer program displays glTF files.
• Added an option to build using header-only spdlog.
• Added GPU profiling with Tracy.
• Place collections of models using an aribitrary CRS. Added the proj library to do transforms between CRSes. Models can be loaded using VSG's vsgXchange library.
• Enabled depthClamp and samplerAnisotropy features (1 year, 7 months ago)
• Added smooth LOD transitions based on a blue noise texture

Fixes

• Error messages from Curl were improved. Problems with OpenSSL finding the correct configuration files were fixed.
• The location specified by the --poi argument is actually used to initialize the home viewpoint.
• Several serious memory leaks are fixed.
• Use vsg::ViewDependentStateBinding in pbr shader set, which avoids a black Earth in some implementations.
• Use the transpose inverse modelview matrix for normals in the pbr shader

Now that vsgCs is using the official release of Cesium Native, vsgCs will track Cesium Native's releases and, as a result, will follow the same monthly cadence, although vsgCs will obviously have far fewer contributions. We want vsgCs to be an extremely solid library for paging 3D Tiles and allied content in the VSG, but it won't provide particularly advanced rendering algorithms or user interaction. Those will be implemented in other projects that consume vsgCs. As a result, vsgCs will evolve to be more flexible.

[gwaldron]

Way to go Tim :)