Tuto tiny-ecs demo Part 7 Systems to move actors
We continue with our tiny-ecs demo. It is time to add some action!
A System to control our player1
We will create a system to control our player1 using the keyboard.
Please in the systems folder "_S" create a file called "sPlayer1Control.lua" for example.
SPlayer1Control = Core.class()
function SPlayer1Control:init(xtiny) -- tiny function
xtiny.system(self) -- called only once on init (no update)
end
function SPlayer1Control:filter(ent) -- tiny function
return ent.isplayer1
end
function SPlayer1Control:onAdd(ent) -- tiny function
stage:addEventListener(Event.KEY_DOWN, function(e) -- is the stage best?
if e.keyCode == KeyCode.LEFT then ent.isleft = true end
if e.keyCode == KeyCode.RIGHT then ent.isright = true end
if e.keyCode == KeyCode.SPACE then ent.isaction1 = true end
end)
stage:addEventListener(Event.KEY_UP, function(e) -- is the stage best?
if e.keyCode == KeyCode.LEFT then ent.isleft = false end
if e.keyCode == KeyCode.RIGHT then ent.isright = false end
if e.keyCode == KeyCode.SPACE then ent.isaction1 = false end
end)
end
In the init function we tell tiny-ecs that this system will be executed only once on init.
Then in the filter function we tell tiny-ecs to execute the system on entities with an id of isplayer1.
Finally, in the o
Entity Component
Now we extend our player1 entity with the body component.
Please go to the "ePlayer1.lua" file and add the following code:
-- ...
-- params
self.x = x
self.y = y
-- BODY COMPONENTS: function CBody:init(xspeed, xjumpspeed)
self.body = CBody.new(8*16, 8*16)
self.body.defaultmass = 1
self.body.currmass = self.body.defaultmass
-- ...
The component will also serve as an id for a later System we will create.
You can add more parameters to the body component like mass, ...
A Component can be attached to any entity.
The challenge with the ECS paradigm is to create meaningful components and systems!
Next?
In the next part, we will create systems to move our actors (entities).
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