Tobias Mansfield-Williams t-mw

Achieving warp speed with Rust

CUSTOM GAME ENGINES: A Small Study

WARNING: Article moved to separate repo to allow users contributions: https://github.com/raysan5/custom_game_engines

A couple of weeks ago I played (and finished) A Plague Tale, a game by Asobo Studio. I was really captivated by the game, not only by the beautiful graphics but also by the story and the locations in the game. I decided to investigate a bit about the game tech and I was surprised to see it was developed with a custom engine by a relatively small studio. I know there are some companies using custom engines but it's very difficult to find a detailed market study with that kind of information curated and updated. So this article.

Nowadays lots of companies choose engines like [Unreal](https:

	Latency Comparison Numbers (~2012)
	----------------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	Compress 1K bytes with Zippy 3,000 ns 3 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us
	Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD

	; -> ->> -<> -<>> for S7 Scheme
	; inspired by https://github.com/nightfly19/cl-arrows and https://github.com/rplevy/swiss-arrows

	(require stuff.scm)
	; using: any? while
	; replace those with your favorite scheme alternatives

	; direct translation from https://github.com/nightfly19/cl-arrows
	(define (arrow-proto handler initial-form forms)
	(let ((output-form initial-form)

	{-# LANGUAGE RecordWildCards, Arrows #-}

	import Numeric
	import Data.Char

	import Control.Monad
	import Data.Monoid ((<>))
	import Data.List (nub, sort, reverse)

	data RepeatBounds = RB

Tobias Mansfield-Williams t-mw

Achieving warp speed with Rust

Contents:

CUSTOM GAME ENGINES: A Small Study