chroma_solstice/door.lua

require "entity"

Door = class("Door", Entity)

function Door:initialize(x, y)
	Entity.initialize(self, {
		x = x,
		y = y,
		color = "white",
		collision = "unmoveable",
		sprites = {
			red = loadSprite("art/game/door_r.png"),
			green = loadSprite("art/game/door_g.png"),
			blue = loadSprite("art/game/door_b.png"),
		},
	})
	self.locked = true

	self.colors = {}
	for _, color in pairs({"red", "green", "blue"}) do
		self.colors[color] = true --these are currently loc_ed
	end
	self:refreshSprites()
end

-- keep the per-channel sprite map in sync with lock state so the shared
-- Entity:draw(channel) renders the door with no door-specific draw code
function Door:refreshSprites()
	self.sprites = {}
	for _, c in ipairs({"red", "green", "blue"}) do
		if self.locked then
			if self.colors[c] then self.sprites[c] = loadSprite("art/game/door_" .. c:sub(1, 1) .. ".png") end
		else
			self.sprites[c] = loadSprite("art/game/door_unlocked.png")
		end
	end
end

function Door:setColors(colors)
	local offColors = {}

	for color, off in pairs(colors) do
		if off then
			if self.colors[color] then self.colors[color] = false end
			table.insert(offColors, color)
		else
			if not self.colors[color] then self.colors[color] = true end
		end
	end

	if #offColors == 3 then
		if self.locked then self:unlock() end
	else
		if not self.locked then self:lock() end
	end

	self:refreshSprites()
end

function Door:unlock()
	self.locked = false
	self.collision = "none"
end

function Door:lock()
	self.locked = true
	self.collision = "unmoveable"
end