Windows build instructions and pip wheels

[colmap]

Windows build instructions and pip wheels

[stevosaurus]

+1 I would like windows wheels available as well. I am struggling to build the library on windows with the given instructions and latest commit in master.

[urbste]

I would highly recommend to use the Ubuntu subsystem WSL 2 this. WSL2 + VSCode with Remote Explorer Extension. In this way you can install and use pycolmap (or rather any Linux only project) on Windows without problems.

[mihaidusmanu]

I think a lot of people use vcpkg on Windows .

Maybe you can take a look at the following guide to compile PyCOLMAP on Windows - https://github.com/colmap/pycolmap/pull/85/files (but I think this way broke at some point)

[pwais]

@mihaidusmanu FWIW I've messed around some more and now I'm installing COLMAP via vcpkg. I have a modern Core i7 laptop with good internet and it's taking now over 4hrs and still going... I wonder, do you think the COLMAP maintainers might be open to just building pycolmap wheels as part of their own release? That's probably a longer conversation... but it would save a bit of build confusion and afford a better tie between pycolmap and colmap releases. I wonder how many windows users are indeed spending 4+ hours installing colmap via vcpkg ...

Thus far I've failed to get Github CI to build a wheel. It'll run for 4+hours but I'm concerned about running out of minutes on my account. Other alternatives I'll try:

• use the Windows binary release plus the source release headers. I've never tried something like that on Windows CMake but it might work. that strategy works on linux cmake / C++ usually at least.
• see if there's a way to have conda and vcpkg work together for pycolmap windows wheels.. https://github.com/conda-forge/vcpkg-feedstock I guess most windows users use conda? And so that might be a fruitful avenue.

[maorp]

https://github.com/colmap/pycolmap/pull/85/files
this worked for me, just use: vcpkg install colmap[cuda]:x64-windows --head
if you want to use dense reconstruction...

if vcpkg fails to build with cuda (nvcc errors) - there is another way...

1. install colmap without cuda using vcpkg (this will also install all deps)
2. compile colmap independently from source using cmake (with cuda)
3. copy the libs from 3 to vcpkg installed/colmap folder
4. if you want to build pycolmap from source - go to C:\dev\vcpkg\installed\x64-windows\share\colmap\colmapConfig.cmake find the line with "set(COLMAP_CUDA_ENABLED ON)" - make sure its on.
5. add env variable CMAKE_TOOLCHAIN_FILE=C:/dev/vcpkg/scripts/buildsystems/vcpkg.cmake
6. in pycolmap folder - pip install .

[MirrorYuChen]

Hard Core Demand!!!!!!!!

[Skydes]

+1, likely the source of some issues/confusions when installing hloc: cvg/Hierarchical-Localization#149 cvg/Hierarchical-Localization#140

[ZZWang21]

I would highly recommend to use the Ubuntu subsystem WSL 2 this. WSL2 + VSCode with Remote Explorer Extension. In this way you can install and use pycolmap (or rather any Linux only project) on Windows without problems.

what if I use pycolmap on Windows?

[zr19980402]

I have got the same error , But I cannot find a valid way to solve it. Could you help me?

[pwais]

Am attempting to work on this in #114 ...

Dumb question: how are windows users installing pycolmap today? It seems the windows binary release for COLMAP doesn't necessarily include everything you need... but vcpkg can install it maybe? Do windows users use vcpkg to install COLMAP?

[pwais]

thank you @mihaidusmanu ! I'll keep pushing on vcpkg ... it looks like part of that recommended path still works
https://github.com/pwais/pycolmap/actions/runs/4220906865/jobs/7327625654

[pwais]

cc #70