implement component system

1 files changed, 48 insertions, 0 deletions

diff --git a/Sprite.lua b/Sprite.lua
new file mode 100644
index 0000000..dac5ce8
--- /dev/null
+++ b/Sprite.lua
@@ -0,0 +1,48 @@
+local component = require 'component'
+local Transform = require 'Transform'
+local Drawable = require 'Drawable'
+
+local Sprite = component({Drawable}, {Transform})
+
+local function load_image(path)
+	return love.graphics.newImage(path, {dpiscale = 2})
+end
+
+local loaded = setmetatable({}, {__mode = 'v'})
+local function get_states(name)
+	if loaded[name] then return loaded[name] end
+	loaded[name] = {}
+
+	local path = "sprite/"..name
+	if love.filesystem.getInfo(path..".png", 'file') then
+		loaded[name][name] = load_image(path..".png")
+	elseif love.filesystem.getInfo(path, 'directory') then
+		local files = love.filesystem.getDirectoryItems(path)
+		for _, file in ipairs(files) do
+			local state = file:match '^(.*)%.png$'
+			if state then
+				loaded[name][state] = load_image(path.."/"..file)
+			end
+		end
+	end
+	return loaded[name]
+end
+
+function Sprite:init(inst)
+	assert(inst.name)
+	inst.state = inst.state or inst.name
+	inst.states = get_states(inst.name)
+end
+
+function Sprite:draw()
+	self.obj[Transform]:use()
+	local i = self.i.states[self.i.state]
+	local w, h = i:getDimensions()
+	love.graphics.draw(i, 0, 0, 0, 1, 1, w / 2, h / 2)
+end
+
+function Sprite:bee()
+	print "apioform"
+end
+
+return Sprite