local coords = require"common.coords"

-- in screen units
local screen_width, screen_height = love.graphics.getDimensions()

-- zoom is screen pixels per world unit
local Camera = {}
Camera.__index = Camera
function Camera.make(pos,zoom)
	pos = pos or coords.Pos.make(0,0)
	zoom = zoom or 30
	return setmetatable({pos=pos,zoom=zoom},Camera)
end
function Camera.apply_trans(self)
	love.graphics.origin()
	-- centre (0,0) in the middle of the screen
	love.graphics.translate(screen_width/2,screen_height/2)
	-- apply camera transformations

	love.graphics.scale(self.zoom)
	love.graphics.translate(-self.pos.x,-self.pos.y)
end


return {Camera=Camera}