Intro to my Voxel Engine

-- main.lua

-- Voxel Engine Script
-- @author Natesh Narain

package.path = '?.lua;' .. package.path

require("player")

-- -------------------------------------------------------------------------
-- Main
-- -------------------------------------------------------------------------
function main()
	--
	engine = Engine.getEngine()

	-- get the camera
	camera = engine:getCamera()

	-- create the opengl window and initial context
	engine:createWindow("Voxel Engine Test", 1080, 720)

	-- register the window for UI callbacks
	window = engine:getWindow()
	registerUICallbacks(window)

	-- load assets
	engine:loadAtlas("assets/atlas.png")

	-- create a chunk manager for the terrain
	local terrain = ChunkManager(32, 32, 32, 16, 1, "atlas")
	generateTerrain(terrain, 7)

	-- add the chunk managers to the engine
	engine:addManager(terrain)

	-- create a timer to get the delta frame time
	timer = Timer()

	-- create the player
	player = Player(camera)

	-- Window Event Loop: loop while window hasn't been signaled to close
	while not window:shouldClose() do
		-- poll user events
		window:pollEvents()

		-- get the delta time
		delta = timer:getElapsed()

		-- update game logic
		update(delta)

		-- render
		engine:render()

		--
		window:swapBuffers()
	end
end

function update(delta)
	engine:updateCameraView(delta)
	updatePlayer(delta)
end

-- update the cameras movement on the xz plane
function updatePlayer(delta)

	-- update forward \ backward movement
	if window:isKeyPressed(Window.Key.W) then
		player:advanceForward(delta)
	elseif window:isKeyPressed(Window.Key.S) then
		player:advanceForward(-delta)
	end

	-- update right \ left movement
	if window:isKeyPressed(Window.Key.A) then
		player:advanceRight(-delta)
	elseif window:isKeyPressed(Window.Key.D) then
		player:advanceRight(delta)
	end

end

-- use a height map generating using a Noise class the create the terrain
function generateTerrain(terrain, octaves)

	local x = terrain:getBlockX()
	local z = terrain:getBlockZ()

	local heightMap = Noise(x, z)
	heightMap:generate(octaves)

	for i = 0,x-1 do
		for k = 0,z-1 do
			local h = math.floor(heightMap:at(i, k) * 20)

			for j = 0,h do
				if j == h then
					terrain:setBlock(i, j, k, 2)
				elseif j == h-1 then
					terrain:setBlock(i, j, k, 4)
				else
					terrain:setBlock(i, j, k, 3)
				end
			end

		end
	end
end

function onKeyEvent(keycode)

end

function onMouseMove(x, y)

end


-- run main
main()

-- Player.lua


Player = {}
Player.__index = Player

setmetatable(Player, {
	__call = function(cls, ...)
		local self = setmetatable({}, Player)
		self:_init(...)
		return self
	end
})

function Player:_init(camera)
	self.camera = camera
	self.speed = 20
end

function Player:advanceForward(delta)
	self.camera.position = self.camera.position + (self.camera.direction * self.speed * delta)
end

function Player:advanceRight(delta)
	self.camera.position = self.camera.position + (self.camera.right * self.speed * delta)
end