JamesMcMahon/monocle-engine

Cite as: JamesMcMahon/monocle-engine
Original: https://github.com/JamesMcMahon/monocle-engine
Pinned: JamesMcMahon/monocle-engine @ 759c15ad6a59c4855db36fd0dfc1970cef9607a5
Accessed: 2026-10-20
Licence: MIT (License.txt, copyright 2012–2014)
Credit: Engine by Maddy Thorson. GitHub mirror hosted under James McMahon's account; the Celeste README links the original Bitbucket repository.
Notes: The Celeste README calls this "The Framework Celeste was developed in". It is the public version, not necessarily the build that shipped with Celeste: for example it sets IsFixedTimeStep = false, while Celeste's own code says the game "is locked to 60fps".

Cited on

In each update, `Player.Update` ticks both jump timers, the state machine runs `NormalUpdate` (gravity, hold, and new jump), and then `MoveV` applies `Speed.Y * Engine.DeltaTime`.	`Monocle/Entity.cs L95–98`	T3
In the public Monocle source, `Calc.Approach(val, target, maxMove)` moves `val` toward `target` by at most `maxMove` without overshooting.	`Monocle/Util/Calc.cs L852–855`	T3
At normal speed, Celeste's `Engine.DeltaTime` is most likely `(float)0.0166667` s, the XNA and FNA default 166,667-tick step, not an exact 1/60 s.	`Monocle/Engine.cs L198–199`	T1