luna

A set of love2d helpers lib

luna.input

input = require("input")

function love.load()
	input.registerKey("jump", "space", "up", "c")
	input.registerKey("select", "space", "c", "enter")
end

function love.update(dt)
	input.update(dt)

	if input.isMouseClicked(1) then
		input.fixMousePos() -- call this function before use 'input.getMouseDelta()'
	end

	local dx, dy = input.getMouseDelta()
	print(dx, dy)

	if input.isKeyDown("a") then
		print("a")
	end

	if input.isPressed("jump") then print("jump!!") end
end

TODO

• Joystick support
• Named input: input.isPressed("jump") ~> '"jump" = "space", "c", ...'

luna.class

class = require("class")
local Player = class:extend("Player")

function Player:constructor(x, y)
	self.x = x
	self.y = y
end

function Player:update(dt)
	if love.keyboard.isDown("right") then self.x = self.x + 1 end
	if love.keyboard.isDown("left") then self.x = self.x - 1 end
end

function Player:draw()
	love.graphics.rectangle("line", self.x, self.y, 32, 32)
end

function love.load()
	p1 = Player:new(0, 0)
	p2 = Player(32, 32)
end

function love.update(dt)
	p1:update(dt)
	p2:update(dt)
end

function love.draw()
	p1:draw()
	p2:draw()
end

luna.sprite

Sprite(image or path, frame_width, [frame_height (frame_width)])

local Sprite = require("luna.sprite")
local input = require("luna.input")
local sprite = Sprite("assets/knight.png", 16)

local x, y = 0, 0

function love.load()
	sprite:add_animation("idle", "1-4")
	sprite:add_animation("walk", "5-10")
end

function love.update(dt)
	input.update(dt)

	if input.isKeyDown("left") then
		x = x - 100 * dt
		sprite:play("walk")
		sprite:flip(true)
	elseif input.isKeyDown("right") then
		x = x + 100 * dt
		sprite:play("walk")
		sprite:flip(false)
	else
		sprite:play("idle")
	end

	sprite:update(dt)
end

function love.draw()
	sprite:draw(x, y)
end

luna.camera

Camera(x, y, width, height [, zoom (1), angle (0)])

Constructor for camera class

:update(dt)

Update camera (needed for smooth functions and follow target)

:move(x, y [, smooth (false)])

Move camera to position

:rotate(angle [, smooth])

Rotate camera

:set_zoom(zoom [, smooth])

Zoom (scale) camera

:offset(ox (string or number) [, oy (ox)])

Change camera offset, ox string arg can be: "center", "left", "right" and oy string arg can be "top", "center", "bottom"

:attach()

Attach camera for apply transform

:detach()

Pop camera

local Camera = require("luna.camera")

function love.load()
	camera = Camera(0, 0, 320, 160)
end

function love.update(dt)
	camera:update(dt)
end

function love.draw()
	camera:attach()
	-- draw stuff here
	camera:detach()
end

luna.canvas

Canvas(width, height [, filter ("nearest")])

Constructor for canvas

:attach()

Bind canvas

:detach()

Unbind canvas

:draw()

Draw canvas

:on_resize(w, h)

Callback function to autoscale canvas, if you rewrite love.resize, call that function inside that

You can use Canvas with Camera module

local Canvas = require("luna.canvas")
local Camera = require("luna.camera")

function love.load()
	canvas = Canvas(160, 90)
	camera = Camera(0, 0, 160, 90)
end

function love.update(dt)
	camera:update(dt)
end

function love.draw()
	canvas:attach()
	camera:attach()
	-- draw stuff here
	camera:detach()
	canvas:detach()

	canvas:draw()
end