love2d打飞机---子弹_love free2d game 代码-优快云博客

本文介绍了一个简单的游戏开发示例，使用Lua语言和Love2D框架。通过创建一个可以移动并发射子弹的飞机，展示了如何加载图像资源、处理键盘输入、更新游戏状态和绘制游戏元素。适合初学者了解游戏开发的基本流程。

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debug = true

player = { x = 200, y = 710, speed = 150, img = nil }

-- Timers
-- We declare these here so we don't have to edit them multiple places
canShoot = true
canShootTimerMax = 0.2 
canShootTimer = canShootTimerMax

-- Image Storage
bulletImg = nil

-- Entity Storage
bullets = {} -- array of current bullets being drawn and updated

function love.load(arg)
    player.img = love.graphics.newImage('assets/plane.png')
    bulletImg = love.graphics.newImage('assets/bullet.png')
    --we now have an asset ready to be used inside Love
end

function love.update(dt)
	-- I always start with an easy way to exit the game
	if love.keyboard.isDown('escape') then
		love.event.push('quit')
	end

	if love.keyboard.isDown('left','a') then
		player.x = player.x - (player.speed*dt)
	elseif love.keyboard.isDown('right','d') then
		player.x = player.x + (player.speed*dt)
  end
  
  
  -- Time out how far apart our shots can be.
  canShootTimer = canShootTimer - (1 * dt)
  if canShootTimer < 0 then
    canShoot = true
  end

  if love.keyboard.isDown('space', 'rctrl', 'lctrl') and canShoot then
    -- Create some bullets
    newBullet = { x = player.x + (player.img:getWidth()/2), y = player.y, img = bulletImg }
    table.insert(bullets, newBullet)
    canShoot = false
    canShootTimer = canShootTimerMax
  end

  -- update the positions of bullets
  for i, bullet in ipairs(bullets) do
    bullet.y = bullet.y - (250 * dt)

      if bullet.y < 0 then -- remove bullets when they pass off the screen
      table.remove(bullets, i)
    end
  end

end

function love.draw(dt)
    love.graphics.draw(player.img, player.x, player.y)
    
    for i, bullet in ipairs(bullets) do
      love.graphics.draw(bullet.img, bullet.x, bullet.y)
    end
end