View source for Tuto tiny-ecs demo Part 10 Conclusion

__TOC__

So this is the last chapter.

== Adding Buildings ==
Let's finish the '''tiny-ecs demo''' by adding some buildings to our level1.

In the entities folder "_E", let's add a file called "''eBuilding.lua''" for example.

This is the code for an '''EBuilding''' entity:
<syntaxhighlight lang="lua">
EBuilding = Core.class()

function EBuilding:init(xspritelayer, x, y, w, h)
	-- sprite
	self.spritelayer = xspritelayer
	self.sprite = Pixel.new(math.random(0xffffff), 1, w, h)
	self.sprite:setAnchorPoint(0.5, 1)
	-- params
	self.x = x
	self.y = y
end
</syntaxhighlight>

The only thing here is to change the anchor point of the '''EBuilding''' entity.

Now in the "''LevelX.lua''" file we add some buildings to tiny-ecs world:
<syntaxhighlight lang="lua">
	-- ...
	-- tiny-ecs
	if self.tiny == nil then
		self.tiny = require "classes/tiny-ecs"
	end
	self.tiny.tworld = self.tiny.world()
	-- some deco (xspritelayer, x, y, w, h)
	for i = 1, 8 do -- 8 random buildings
		self.tiny.tworld:addEntity(
			EBuilding.new(self.camera,
				math.random(myappwidth), 14*16,
				math.random(4*16, myappwidth/4), math.random(8, 12)*16
			)
		)
	end
	-- some enemies (xspritelayer, x, y, dx, dy)
	local nmes = {}
	for i = 1, 10 do -- we create 10 enemies
	-- ...
</syntaxhighlight>

We add 8 randomly positionned and sized EBuilding entities.

'''I hope you like the demo'''!

== Gideros Project ==
In the project I added an '''SDebugDraw''' system.

'''[[Media:tiny-ecs_demo.zip]]''' '''(tip: right click and save link as)'''

== Conclusion ==
This was my take on using '''tiny-ecs'''. To sum up:
* tiny-ecs has a world
* a world is made of entities and systems
* entities have ids
* entities can have components
* components can serve as ids
* a system filters the entities to act upon based on entities ids
* a system can run once or every update

'''I really enjoy making games using the ECS paradigm. I hope to have given you the keys to experiment with it'''!


'''Thanks for reading'''!

== Further reading ==
One last link if you want to know more about ECS:

'''[https://github.com/SanderMertens/ecs-faq#what-is-ecs github SanderMertens what is ecs]'''


Prev.: [[Tuto tiny-ecs demo Part 9 Player Shoots Enemies Die]]</br>
'''END'''


'''[[Tutorial - tiny-ecs demo]]'''
{{GIDEROS IMPORTANT LINKS}}