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