allegro : Cross-platform library aimed at video game and multimedia programming ( https://liballeg.org/ )
colmap : A general-purpose Structure-from-Motion and Multi-View Stereo pipeline. ( https://colmap.github.io/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a ahyangyi-overlay
For Paludis use this rsync : rsync://gentoo.zugaina.org/ahyangyi-overlay-portage
If you have a problem : ycarus(-at-)zugaina.org