very simple pure CPU raymarching demo

[karabuta via Digitalmars-d-announce]

On Sunday, 24 January 2016 at 14:18:23 UTC, ketmar wrote:
> ok, just4fun, mulththreaded renderer[1]. set ThreadCount to 
> number of your CPU cores to get some speedup.
>
> note: this is not how `std.concurrency` should be used! please, 
> don't do wroker queues as i did!
>
> [1] http://ketmar.no-ip.org/dmd/zrm3_adam_trd_x4.d


This is the kind of maths I hoped I could try to understand. The 
spirit is not there :)