QuakeServer

The server side of the Quake engine in Elixir. It runs a QuakeC game's levels: spawning, entities, collision and linking, server physics, monster movement, the builtins, and the messages the program writes. It serves both id's Quake programs and FTE's extended programs (FreeHL's, for one).

server = QuakeServer.Server.start("e1m1", source: MyGame.Source, skill: 1)
server = QuakeServer.Server.connect(server)
server = QuakeServer.Server.frame(server, 1 / 60, command)
{events, server} = QuakeServer.Server.drain(server)

A game supplies its files through a QuakeServer.Source (program, maps, models, and optionally file reads, listings and package names).

Quake and FTE

• Quake's builtins (QuakeServer.Builtins) cover numbers 1 to 78.
• FTE's extension builtins (QuakeServer.Extensions) are grouped by family: strings and sprintf, maths, entities, settings and info keys, storage (files, hash tables, memory, string buffers), effects, messages, models (studio sequences, skeleton objects, tags, surfaces) and waypoint routes.
• Spawning and hooks: a program with CheckSpawn spawns map entities itself; init and initents are called at level start.
• Player commands: a program with SV_RunClientCommand moves its own players (QuakeServer.Physics.Command).
• Console: QuakeServer.Console runs the commands programs queue with localcmd and the config files they exec.
• Entity networking: QuakeServer.Network keeps each entity's SendFlags every server frame and, when a player is sent a packet, runs SendEntity for the entities the player may see under FTE's rules (fat PVS, pvsflags, viewmodelforclient, tag_entity, customizeentityforclient, dimensions; QuakeServer.Visibility).
• Messages to players: QuakeServer.Outbox holds each player's reliable messages, datagram and centerprint until its next packet; multicast reaches the players FTE would send to (QuakeServer.Multicast), and bprint, sprint and centerprint write svc_print and svc_centerprint.
• The host: QuakeServer.Runner runs a level on its own clock as FTE's host does, and sends the player a packet (reliable messages, entity updates, datagram) for each command it receives.

Options set what differs between games: the builtins module, hull choice, spawn-flag filtering, coordinate encoding, statement budget, a data directory for written files, and a function trace.

Licence

GPL-2.0-or-later. The server physics, monster movement, the Quake builtins, the message encodings and the player movement (QuakeServer.Pmove, from QuakeWorld) follow id Software's GPL release of Quake, so this package is a derivative of it. The FTE extensions follow the behaviour FTE documents in its generated fteextensions.qc.