1. +1 on Neil's +sound and +set-position convention (as a private Racket
citizen not the style guide author)
2. When I find myself writing such code now, I often write a syntactic
extension that gives me some flexibility in how I want to do it:
(commands
(sound ...)
(set-position ...)
...)
which I can then expand to
(let* ([L '()]
[L (cons (sounds L ...) ...)] ;; <-- if L is needed for context (you say
it isn't)
[L (cons ...)]
...)
L) ;; or (send-to some-address L)
Alternatively I use the obvious set! expansion.
Either way hygienic expansion ensures that L isn't accidentally accessible,
only to commands that need it (or none).
-- Matthias
On Jul 3, 2015, at 12:32 PM, John Carmack <jo...@oculus.com> wrote:
> I am using a “cmd-name!” naming format for functions that are adding to the
> command list that will be communicated to the host program.
>
> (cmd-sound! WAV-FILE)
> (cmd-set-position! pos yaw-radians)
> Etc.
>
> I am considering using a terser naming convention, perhaps “@name”, so you
> would have:
> (@sound WAV-FILE)
> (@set-position pos yaw-radians)
> Etc.
>
> I would argue that while they do mutate global state by sticking something on
> a list, the list is never looked at except at the very end of the frame to
> hand it over to the host system, so they are more like a display / log
> function that a global state hazard, and having a syntax cue for functions
> that are going to impact the sensory presentation may be useful.
>
> Thoughts? What symbols have the least historic baggage?
>
>
>
>
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