main.lua

-- Made in 2 hours, copied a lot from tutorials by Jack Robbers
rotation = 0
createEnemyTimerMax = 0.4
createEnemyTimer = createEnemyTimerMax

love.graphics.setDefaultFilter('nearest')

computer = { x = 200, y = 710, speed = 300, img = nil }
love.graphics.setBackgroundColor(255,255,255)
enemyImg= nil
enemies = {}

isAlive = true
score = 0

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

function love.load(arg)
	computer.img = love.graphics.newImage('assets/computer.png')
	enemyImg = love.graphics.newImage('assets/clock.png')
end

function love.update(dt)
  if isAlive then
    score = score + 1
  end
	if love.keyboard.isDown('escape') then
		love.event.push('quit')
	end
	if love.keyboard.isDown('left','a') then
		if computer.x > 0 then
			computer.x = computer.x - (computer.speed*dt)
		end
	elseif love.keyboard.isDown('right','d') then
		if computer.x < (love.graphics.getWidth() - computer.img:getWidth()) then
			computer.x = computer.x + (computer.speed*dt)
		end
	end
	if not isAlive and love.keyboard.isDown('r') then
		-- remove all our bullets and enemies from screen
		bullets = {}
		enemies = {}

		-- reset timers
		canShootTimer = canShootTimerMax
		createEnemyTimer = createEnemyTimerMax

		-- move computer back to default position
		computer.x = 50
		computer.y = 710

		-- reset our game state
		score = 0
		isAlive = true
	end

	createEnemyTimer = createEnemyTimer - (1 * dt)
	if createEnemyTimer < 0 then
		createEnemyTimer = createEnemyTimerMax

		-- Create an enemy
		randomNumber = math.random(10, love.graphics.getWidth() - 10)
		newEnemy = { x = randomNumber, y = -10, img = enemyImg }
		table.insert(enemies, newEnemy)
	end
	for i, enemy in ipairs(enemies) do
	enemy.y = enemy.y + (100 * dt)

	if enemy.y > 850 then -- remove enemies when they pass off the screen
		table.remove(enemies, i)
	end
	end
	for i, enemy in ipairs(enemies) do
		if CheckCollision(enemy.x, enemy.y, enemy.img:getWidth(), enemy.img:getHeight(), computer.x, computer.y, computer.img:getWidth() * 3, computer.img:getHeight() * 3)
		and isAlive then
			table.remove(enemies, i)
			isAlive = false
		end
	end
end

function love.draw(dt)
	love.graphics.setColor(0, 255, 0, 255)
	love.graphics.print(score, 0, 0, 0, 2, 2)
	love.graphics.setColor(0,0,0)
	if isAlive then
		love.graphics.draw(computer.img, computer.x, computer.y, 0, 3, 3)
	else
		love.graphics.print("Press 'R' to restart", love.graphics:getWidth()/2-50, love.graphics:getHeight()/2-10)
	end

	for i, enemy in ipairs(enemies) do
		rotation = rotation + 0.001
		love.graphics.draw(enemy.img, enemy.x, enemy.y, rotation)
	end

end