A list of helpful libraries and code

SDK Development Discussion
21

Kubrick
A library to help organize and execute logic for action sequences in your game. It sits on coroutines and is based on the ideas in this post by Elias Daler: Redirecting to https://edw.is/

kubrick.zip (701 Bytes)

Example project coming soon.

Here's a rough example:

-- cutscene.lua

class("StopPlayerAction").extends(kubrick.Action)
function StopPlayerAction:update(dt, player)
	local a <const> = player.acceleration * dt
	player.velocity.x += math.cos(player.rotation) * a
	player.velocity.y += math.sin(player.rotation) * a
	local velocity_magnitude <const> = player.velocity:magnitude()
	if velocity_magnitude <= a then
		ship.velocity.x = 0
		ship.velocity.y = 0
		self.finished = true -- Marks the action as finished.
	end
end

function cutscene_main(dt)
	kubrick.Wait(2.0) -- wait 2 seconds.
	StopPlayerAction(globals.player) -- stop player
	kubrick.Together(
		function()
			print("this function gets run")
			kubrick.Wait(1.0)
			print("in parallel the other functions.")
		end,
		function()
			kubrick.Wait(3.0)
			print("This function finishes last because it takes the longest.")
		end
	) -- run 2 or more routines in parallel. 
end


-- main.lua

import "cutscene"

local my_cutscene <const> = kubrick.create(cutscene_main)
local cutscene_started = false

function playdate.update()
	if cutscene_started then
		kubrick.update(my_cutscene, dt)
		if kubrick.finished(my_cutscene) then
			cutscene_started = false
		end
	end
end
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