Add readme

README.md

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+# Creando sencillos juegos con Löve2D
+
+![Löve2D Logo](logo.png)
+
+Cada uno de los pasos se encuentra en la carpeta de **STEPS**.
+
+- **1_hello**: Hola mundo.
+- **2_layout**: Ventana.
+- **3_background**: Fondo
+- **4_spaceship1**: Nave estática.
+- **4_spaceship2**: Nave animada.
+- **5_move_spaceship**: Moviendo la nave.
+- **6_asteroids1**: Creando un asteoride.
+- **6_asteroids2**: Moviendo el asteroide.
+- **6_asteroids2**: Generando asteroides aleatorios.
+- **7_collision_detection**: Colisiones.
+- **8_sounds**: Sonidos.
+
+## Ejecutar el juego terminado
+
+Descarga todos los archivos en zip y descomprimelos. 
+
+Instala löve desde su [página oficial](https://love2d.org/).
+
+Ejecuta *love* seguido de la carpeta descargada del proyecto.
+
+``` bash
+love love2d-tutorial-runner
+```

main.lua

@@ -93,6 +93,7 @@ function love.update(dt)
                 -- Colision
                 if checkCollision(spaceship.x, spaceship.y[spaceship.pos], spaceship.img:getWidth(), spaceship.img:getHeight() / spaceship.num_frames / 2, asteroid.x, asteroid.y[asteroid.pos], asteroid.img:getWidth(), asteroid.img:getHeight()) then
                         game.play = false
+                        sounds.die:stop()
                         sounds.die:play()
                         explosion.animate = true
                         explosion.x = spaceship.x

steps/7_collision_detection/main.lua

@@ -0,0 +1,110 @@
+function love.load()
+	math.randomseed(os.time())
+	game = {}
+	game.width = 800
+	game.height = 480
+	game.play = true
+	love.window.setMode(game.width, game.height)
+	score = { x = 500, y = 40 }
+	-- Background
+	background = {}
+	background.img = love.graphics.newImage('assets/sprites/background.jpg')
+	background.x = 0
+	background.y = 0
+        -- Spaceship
+        spaceship = {}
+	spaceship.img = love.graphics.newImage('assets/sprites/spaceship.png')
+	spaceship.x = game.height / 8
+	spaceship.num_frames = 4
+	spaceship.pos_frame = 1
+  	spaceship.frame_height = spaceship.img:getHeight() / spaceship.num_frames
+	spaceship.y = {
+		(game.height / 4) - (spaceship.img:getHeight() / 8),	
+		2 * (game.height / 4) - (spaceship.img:getHeight() / 8),	
+		3 * (game.height / 4) - (spaceship.img:getHeight() / 8),	
+	}
+	spaceship.pos = 1
+	spaceship.frames = {
+                 love.graphics.newQuad(0, spaceship.frame_height * 0, spaceship.img:getWidth(), spaceship.frame_height, spaceship.img:getWidth(), spaceship.img:getHeight()),
+                 love.graphics.newQuad(0, spaceship.frame_height * 1, spaceship.img:getWidth(), spaceship.frame_height, spaceship.img:getWidth(), spaceship.img:getHeight()),
+                 love.graphics.newQuad(0, spaceship.frame_height * 2, spaceship.img:getWidth(), spaceship.frame_height, spaceship.img:getWidth(), spaceship.img:getHeight()),
+                 love.graphics.newQuad(0, spaceship.frame_height * 3, spaceship.img:getWidth(), spaceship.frame_height, spaceship.img:getWidth(), spaceship.img:getHeight())
+             }
+
+        -- Asteroids
+	num_asteroids = 3
+	asteroids = {}
+	for i = 1, num_asteroids do
+		asteroid = {}
+		asteroid.img = love.graphics.newImage('assets/sprites/asteroid_' .. tostring(math.random(1, 9)) .. '.png')
+		asteroid.x = game.width
+		asteroid.y = {
+			(game.height / 4) - (asteroid.img:getHeight() / 2),	
+			2 * (game.height / 4) - (asteroid.img:getHeight() / 2),	
+			3 * (game.height / 4) - (asteroid.img:getHeight() / 2),	
+		}
+		asteroid.pos = 2
+		asteroid.speed = 600
+		asteroids[i] = asteroid
+		if checkCollision(spaceship.x, spaceship.y[spaceship.pos], spaceship.img:getWidth(), spaceship.img:getHeight() / spaceship.num_frames / 2, asteroid.x, asteroid.y[asteroid.pos], asteroid.img:getWidth(), asteroid.img:getHeight()) then
+                        game.play = false
+                        explosion.animate = true
+                        explosion.x = spaceship.x
+                        explosion.y = spaceship.y[spaceship.pos]
+                end
+
+	end
+end
+
+function love.draw()
+	-- Background
+	love.graphics.draw(background.img, background.x, background.y)
+	-- Spaceship
+	if game.play then
+		love.graphics.draw(spaceship.img, spaceship.frames[spaceship.pos_frame], spaceship.x, spaceship.y[spaceship.pos])
+	end
+	-- Asteroids
+	for key, asteroid in pairs(asteroids) do
+		love.graphics.draw(asteroid.img, asteroid.x, asteroid.y[asteroid.pos])
+	end
+end
+
+function love.update(dt)
+        -- Spaceship
+        if spaceship.pos_frame ~= spaceship.num_frames then
+		spaceship.pos_frame = spaceship.pos_frame + 1
+	else
+		spaceship.pos_frame = 1
+	end
+        -- Asteroids
+        for key, asteroid in pairs(asteroids) do
+		asteroid.x = asteroid.x - (dt * asteroid.speed)
+		if asteroid.x < -asteroid.img:getWidth() then
+			asteroid.x = game.width + math.random(0, game.width)
+			asteroid.pos = math.random(1, 3)
+		end
+		if checkCollision(spaceship.x, spaceship.y[spaceship.pos], spaceship.img:getWidth(), spaceship.img:getHeight() / spaceship.num_frames / 2, asteroid.x, asteroid.y[asteroid.pos], asteroid.img:getWidth(), asteroid.img:getHeight()) then
+			game.play = false
+		end
+        end
+end
+
+-- Controls
+function love.keypressed(key, scancode, isrepeat)
+	if key == 'escape' then
+		love.event.push('quit')
+	end
+        if key == 'up' and spaceship.pos > 1 then
+		spaceship.pos = spaceship.pos - 1
+	elseif key == 'down' and spaceship.pos < 3 then
+		spaceship.pos = spaceship.pos + 1
+	end
+end
+
+function checkCollision(x1,y1,w1,h1, x2,y2,w2,h2)
+  return x1 < x2 + w2 and
+         x2 < x1 + w1 and
+         y1 < y2 + h2 and
+         y2 < y1 + h1
+end
+

steps/8_sounds/main.lua

@@ -0,0 +1,115 @@
+function love.load()
+	math.randomseed(os.time())
+	game = {}
+	game.width = 800
+	game.height = 480
+	game.play = true
+	love.window.setMode(game.width, game.height)
+	score = { x = 500, y = 40 }
+	-- Background
+	background = {}
+	background.img = love.graphics.newImage('assets/sprites/background.jpg')
+	background.x = 0
+	background.y = 0
+        -- Spaceship
+        spaceship = {}
+	spaceship.img = love.graphics.newImage('assets/sprites/spaceship.png')
+	spaceship.x = game.height / 8
+	spaceship.num_frames = 4
+	spaceship.pos_frame = 1
+  	spaceship.frame_height = spaceship.img:getHeight() / spaceship.num_frames
+	spaceship.y = {
+		(game.height / 4) - (spaceship.img:getHeight() / 8),	
+		2 * (game.height / 4) - (spaceship.img:getHeight() / 8),	
+		3 * (game.height / 4) - (spaceship.img:getHeight() / 8),	
+	}
+	spaceship.pos = 1
+	spaceship.frames = {
+                 love.graphics.newQuad(0, spaceship.frame_height * 0, spaceship.img:getWidth(), spaceship.frame_height, spaceship.img:getWidth(), spaceship.img:getHeight()),
+                 love.graphics.newQuad(0, spaceship.frame_height * 1, spaceship.img:getWidth(), spaceship.frame_height, spaceship.img:getWidth(), spaceship.img:getHeight()),
+                 love.graphics.newQuad(0, spaceship.frame_height * 2, spaceship.img:getWidth(), spaceship.frame_height, spaceship.img:getWidth(), spaceship.img:getHeight()),
+                 love.graphics.newQuad(0, spaceship.frame_height * 3, spaceship.img:getWidth(), spaceship.frame_height, spaceship.img:getWidth(), spaceship.img:getHeight())
+             }
+
+    -- Asteroids
+	num_asteroids = 3
+	asteroids = {}
+	for i = 1, num_asteroids do
+		asteroid = {}
+		asteroid.img = love.graphics.newImage('assets/sprites/asteroid_' .. tostring(math.random(1, 9)) .. '.png')
+		asteroid.x = game.width
+		asteroid.y = {
+			(game.height / 4) - (asteroid.img:getHeight() / 2),	
+			2 * (game.height / 4) - (asteroid.img:getHeight() / 2),	
+			3 * (game.height / 4) - (asteroid.img:getHeight() / 2),	
+		}
+		asteroid.pos = 2
+		asteroid.speed = 600
+		asteroids[i] = asteroid
+		if checkCollision(spaceship.x, spaceship.y[spaceship.pos], spaceship.img:getWidth(), spaceship.img:getHeight() / spaceship.num_frames / 2, asteroid.x, asteroid.y[asteroid.pos], asteroid.img:getWidth(), asteroid.img:getHeight()) then
+                        game.play = false
+                        explosion.animate = true
+                        explosion.x = spaceship.x
+                        explosion.y = spaceship.y[spaceship.pos]
+                end
+
+	end
+	-- Sound
+	ambient = love.audio.newSource('assets/sounds/ambient.wav', 'static')
+	ambient:play()
+	ambient:setLooping(true)
+
+end
+
+function love.draw()
+	-- Background
+	love.graphics.draw(background.img, background.x, background.y)
+	-- Spaceship
+	if game.play then
+		love.graphics.draw(spaceship.img, spaceship.frames[spaceship.pos_frame], spaceship.x, spaceship.y[spaceship.pos])
+	end
+	-- Asteroids
+	for key, asteroid in pairs(asteroids) do
+		love.graphics.draw(asteroid.img, asteroid.x, asteroid.y[asteroid.pos])
+	end
+end
+
+function love.update(dt)
+        -- Spaceship
+        if spaceship.pos_frame ~= spaceship.num_frames then
+		spaceship.pos_frame = spaceship.pos_frame + 1
+	else
+		spaceship.pos_frame = 1
+	end
+        -- Asteroids
+        for key, asteroid in pairs(asteroids) do
+		asteroid.x = asteroid.x - (dt * asteroid.speed)
+		if asteroid.x < -asteroid.img:getWidth() then
+			asteroid.x = game.width + math.random(0, game.width)
+			asteroid.pos = math.random(1, 3)
+		end
+		if checkCollision(spaceship.x, spaceship.y[spaceship.pos], spaceship.img:getWidth(), spaceship.img:getHeight() / spaceship.num_frames / 2, asteroid.x, asteroid.y[asteroid.pos], asteroid.img:getWidth(), asteroid.img:getHeight()) then
+			game.play = false
+		end
+        end
+end
+
+-- Controls
+function love.keypressed(key, scancode, isrepeat)
+	if key == 'escape' then
+		love.event.push('quit')
+	end
+        if key == 'up' and spaceship.pos > 1 then
+		spaceship.pos = spaceship.pos - 1
+	elseif key == 'down' and spaceship.pos < 3 then
+		spaceship.pos = spaceship.pos + 1
+	end
+end
+
+function checkCollision(x1,y1,w1,h1, x2,y2,w2,h2)
+  return x1 < x2 + w2 and
+         x2 < x1 + w1 and
+         y1 < y2 + h2 and
+         y2 < y1 + h1
+end
+