Atrium - 3D game written in D

[Timur Gafarov via Digitalmars-d-announce]

07.11.2015 21:17, Manuel König пишет:
> Am Fri, 6 Nov 2015 12:04:03 +0300
> schrieb Timur Gafarov <gecko0307 at gmail.com>:
>
>> Atrium (code name) is a work-in-progress science fiction game with
>> physics based puzzles (gravity effects, force fields, etc) akin to
>> Portal or Inverto. The game is fully written in D, it uses custom
>> graphics engine based on OpenGL and SDL. Physics engine is also
>> written from scratch.
>>
>> Source code:
>> https://github.com/gecko0307/atrium
>>
>> IndieDB page:
>> http://www.indiedb.com/games/atrium
>>
>> A precompiled demo for Windows:
>> https://www.dropbox.com/s/qh8gai2n94qe8jj/atrium-testbuild-051115.zip?dl=0
>
> This looks very nice, congrats! I'm especially interested in the physics
> and character controller part, because I'm currently developing a
> character controller myself, but just a sphere character in a static
> triangle world for now.
>
> Finding a robust and fast sliding algorithm for sliding a sphere along
> triangles in a given direction seems to be the hardest part. I'm
> investigating two approaches, which can be simplified to:
>
> 1) move until we hit any geometry, compute new slide direction, repeat
> 2) move first, then project the character out of the world geometry
>
> Both approaches work reasonably well, but there are scenarios where
> they don't work so well (mostly pathetic scenarios). I'll
> definitely look how you solved the problem and maybe tinker with your
> physics code :)
>

I took rather idiomatic approach: move, detect collisions, generate 
contact points, then solve them iteratively. Sliding is obtained 
somewhat automatically.