First commit

main.lua

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+function table_length(T)
+ 	local count = 0
+ 	for _ in pairs(T) do count = count + 1 end
+ 	return count
+end
+
+function love.load(arg)
+	-- Configuración
+	math.randomseed(os.time())
+	love.window.setMode(1280, 720, {resizable=false})
+	love.window.setTitle( 'Alunizaje' )
+	fondo = { x = 0, y = 0, img = love.graphics.newImage('assets/img/fondo.jpg') }
+	game_height = 2880
+	game_width = 1280
+	gravedad = 2
+	-- Fisicas
+	love.physics.setMeter(64) -- Altura del mundo en metros
+  	world = love.physics.newWorld(0, gravedad * 64, true) -- Crea el mundo físico
+
+  	-- Nave fisicas
+  	nave = {}
+	nave_x = game_width / 2
+	nave_y = 0
+  	nave.body = love.physics.newBody(world, nave_x, nave_y, "dynamic") --place the body in the center of the world and make it dynamic, so it can move around
+  	nave.shape = love.physics.newCircleShape(20) --the ball's shape has a radius of 20
+  	nave.fixture = love.physics.newFixture(nave.body, nave.shape, 1) -- Attach fixture to body and give it a density of 1.
+  	nave.fixture:setRestitution(0.9) --let the ball bounce
+  	nave.power = 100
+  	nave.img = love.graphics.newImage('assets/img/nave.png')
+
+	-- Genera los asteroides
+	num_asteroides = 50
+	max_speed = 5
+	img_asteroide = {
+		love.graphics.newImage('assets/img/asteroide1.png'), 
+		love.graphics.newImage('assets/img/asteroide2.png'),
+		love.graphics.newImage('assets/img/asteroide3.png')
+	}
+	asteroides = {}
+	for i=1, num_asteroides do
+		temp_img = img_asteroide[math.random(1, table_length(img_asteroide))]
+		asteroides[i] = { x = math.random(0, game_width - temp_img:getWidth()), 
+		y = math.random(0, game_height - temp_img:getHeight()), 
+		speed = math.random(1, max_speed), 
+		img = temp_img,
+		angle = math.random(0, 90)}
+	end
+end
+
+function love.update(dt)
+	-- Fisicas del mundo
+	world:update(dt)
+
+	-- Controles
+	if love.keyboard.isDown('escape') then
+		love.event.push('quit')
+	end
+
+	if love.keyboard.isDown("right") then 
+    	nave.body:applyForce(nave.power, 0)
+  	elseif love.keyboard.isDown("left") then 
+    	nave.body:applyForce(-nave.power, 0)
+  	end
+  	if love.keyboard.isDown("up") then 
+    	nave.body:applyForce(0, -nave.power)
+  	elseif love.keyboard.isDown("down") then 
+    	nave.body:applyForce(0, nave.power)
+  	end
+
+
+	-- Asteroides rotar
+	for key, value in pairs(asteroides) do
+		-- Rota
+		value.angle = asteroides[key].angle + (dt * math.pi / 10)
+		value.x = asteroides[key].x - asteroides[key].speed
+	end
+
+	-- Asteroides destruir
+	for key, value in pairs(asteroides) do
+		-- Destruye los que salen de pantalla
+		if value.x + asteroides[key].img:getWidth() < 0 then
+			table.remove(asteroides, key)
+		end
+	end
+
+	-- Asteroides crear
+	if table_length(asteroides) < num_asteroides then
+		temp_img = img_asteroide[math.random(1, table_length(img_asteroide))]
+		asteroides[table_length(asteroides) + 1] = { 
+		x = game_width + temp_img:getWidth(), 
+		y = math.random(0, game_height - temp_img:getHeight()), 
+		speed = math.random(1, max_speed), 
+		img = temp_img,
+		angle = math.random(0, 90)}
+	end
+end
+
+function love.draw()
+  	-- Camara
+  	camara_y = -nave.body:getY() + (game_height / 8) - nave.img:getHeight()
+	if (game_height / 8) - nave.img:getHeight() <= nave.body:getY() then 
+  		love.graphics.translate(0, camara_y)
+  	end
+	if game_height - (game_height / 6) < nave.body:getY() then
+ 		love.graphics.translate(0, -game_height)
+  	end
+  	
+	-- Fondo
+	love.graphics.draw(fondo.img, fondo.x, fondo.y)
+
+	-- Asteroides
+	for key, value in pairs(asteroides) do
+		love.graphics.draw(value.img, value.x, value.y, value.angle, 1, 1, value.img:getWidth() / 2, value.img:getHeight() / 2)
+	end
+
+	-- Nave
+	love.graphics.draw(nave.img, nave.body:getX(), nave.body:getY())
+end
+