Separate atmosphere preprocessor

[Schneegans]

This extracts the preprocessing code of the Bruneton atmosphere model into a separate binary. This allows us to precompute the scattering data offline and thus improve the startup time of CosmoScout VR significantly.

The precomputed data is stored in Tiff files and is available in this repository which is used as a submodule in CosmoScout VR.

[JonasGilg]

I get the following error, when I try to compile with Visual Studio 2019:

[...]/plugins/csp-atmospheres/src/models/bruneton/Model.cpp(65): error C2079: "file" verwendet undefiniertes class "std::basic_ifstream<char,std::char_traits<char>>"
[...]/plugins/csp-atmospheres/src/models/bruneton/Model.cpp(65): error C2440: "Initialisierung": "std::basic_string<char,std::char_traits<char>,std::allocator<char>>" kann nicht in "int" konvertiert werden

[Schneegans]

I get the following error, when I try to compile with Visual Studio 2019:

[...]/plugins/csp-atmospheres/src/models/bruneton/Model.cpp(65): error C2079: "file" verwendet undefiniertes class "std::basic_ifstream<char,std::char_traits<char>>"
[...]/plugins/csp-atmospheres/src/models/bruneton/Model.cpp(65): error C2440: "Initialisierung": "std::basic_string<char,std::char_traits<char>,std::allocator<char>>" kann nicht in "int" konvertiert werden

I fixed some other msvc-related issues. However, this error I do not get (also Visual Studio 2019) and the CI builds do not complain either. Do you have an idea what could be the reason?

[JonasGilg]

Okay, I got it to compile. If I start it now I get the following error, when the atmospheres plugin loads:

[I] csp-atmospheres ... Loading plugin...
../share/resources/atmosphere-data/earth/phase.tif: Deflate compression support is not configured.
../share/resources/atmosphere-data/earth/phase.tif: Deflate compression support is not configured.
../share/resources/atmosphere-data/earth/phase.tif: Deflate compression support is not configured.
../share/resources/atmosphere-data/earth/transmittance.tif: Deflate compression support is not configured.
../share/resources/atmosphere-data/earth/transmittance.tif: Deflate compression support is not configured.
../share/resources/atmosphere-data/earth/transmittance.tif: Deflate compression support is not configured.

Edit: Seems that libtiff needs to be compiled with zlib support in Windows to resolve this.
Edit 2: We need libdeflate AND zlib to get this running on Windows.

[Schneegans]

Yeah, I simply use textures without compression now. Seems to be the easier approach, I guess.

[Schneegans]

You'll need a git submodule update to fetch the new textures.

[coveralls]

Pull Request Test Coverage Report for Build 9743267682

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 130 (0.0%) changed or added relevant lines in 4 files are covered.
• 10 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+0.04%) to 1.181%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
plugins/csp-atmospheres/src/models/cosmoscout/Model.cpp	0	1	0.0%
plugins/csp-atmospheres/src/Atmosphere.cpp	0	2	0.0%
plugins/csp-atmospheres/src/models/bruneton/Metadata.cpp	0	6	0.0%
plugins/csp-atmospheres/src/models/bruneton/Model.cpp	0	121	0.0%

Files with Coverage Reduction	New Missed Lines	%
plugins/csp-atmospheres/src/models/bruneton/Model.hpp	2	0.0%
plugins/csp-atmospheres/src/Atmosphere.cpp	3	0.0%
plugins/csp-atmospheres/src/models/bruneton/Model.cpp	5	0.0%

Totals
Change from base Build 9006373097:	0.04%
Covered Lines:	193
Relevant Lines:	16347

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💛 - Coveralls