New Example: Coin Collecting Game

examples/200_coin_collecting_game.lua

@@ -0,0 +1,249 @@
+-- Example: Coin Collecting Game
+-- Author: R. Bassett Jr. (Tatwi)
+--[[Descripton:
+I made this as a performance test to see if I wanted to convert RocketTux 
+from JavaScript (Phaser CE) to Love. It's an example of a simple game that 
+can be built in a day.
+
+Game Play:
+- Collect all the coins before you run out of fuel for your rocket pack!
+- Move with the arrow keys.
+- Ascending and moving forward use more fuel than steady flight, while
+  descending and moving backward (slowing down) use less fuel.
+
+Changing the Difficulty:
+Play with the levelLength, coinsMin, coinsMax, fuelStart, fuelBonus and
+the fuelModMin values (higher = more fuel use for fuelModMin).
+
+Credits:
+- This game started as a copy of the 014_keyboard_move.lua example.
+- coin.ogg, fuel.ogg, semi_arctic.png are from the SuperTux progject
+  (github.com/SuperTux/supertux). fuel.ogg is lifeup.wav in SuperTux.
+- rocketpack-running.ogg, coin.png, fuel-can.png, tux-fly.png, 
+  tux-stand.png are from RocketTux (github.com/Tatwi/RocketTux).
+]]
+require("animation")
+
+x, y = 100, 536
+bgX = 0
+playerSpeed = 400
+levelSpeed = 222
+levelLength = 5000
+totalCoins = 0
+coinsMin = 25
+coinsMax = 50
+coinStartX = 600
+collectedCoins = 0
+fuelStart = 3000
+fuel = 0
+fuelModMin = 2
+fuelCanLive = false
+fuelCanX = 832
+fuelBonus = 200
+fuelChance = 10
+gameOver = true
+winner = false
+gamesPlayed = 0
+gamesWon = 0
+
+function placeCoins()
+	math.randomseed( tonumber(tostring(os.time()):reverse():sub(1,6)) )
+
+    totalCoins = math.random(coinsMin, coinsMax)
+
+    for i = 1, totalCoins do
+    	coins[i] = { }
+    	coins[i].x = math.random(coinStartX,levelLength)
+    	coins[i].y = math.random(24,558)
+    	coins[i].alive = 1
+    end
+end
+
+function love.load()
+	love.mouse.setVisible(false)
+
+	imgBackground = love.graphics.newImage("assets/semi_arctic.jpg")
+
+	coinSound = love.audio.newSource("assets/coin.ogg", "static")
+	fuelSound = love.audio.newSource("assets/fuel.ogg", "static")
+	rocketpackRun = love.audio.newSource("assets/rocketpack-running.ogg", "static")
+	rocketpackRun:setLooping(true)
+
+    imgTuxFly = love.graphics.newImage("assets/tux-fly.png")
+    tuxFly = newAnimation(imgTuxFly, 64, 64, 0.1, 3)
+    tuxStand = love.graphics.newImage("assets/tux-stand.png")
+
+    imgFuelCan = love.graphics.newImage("assets/fuel-can.png")
+
+    imgCoin = love.graphics.newImage("assets/coin.png")
+    coinAnim = newAnimation(imgCoin, 32, 32, 0.1, 4)
+    coins = { }
+
+    placeCoins()
+end
+
+function love.update(dt)
+	local fuelMod = fuelModMin
+
+	if gameOver then
+		if rocketpackRun:isPlaying() then
+			rocketpackRun:stop()
+		end
+
+		if love.keyboard.isDown("space") then
+			gameOver = false
+			winner = false
+			fuel = fuelStart
+			fuelCanX = 832
+			collectedCoins = 0
+			totalCoins = math.random(25,50)
+			placeCoins()
+			fuelSound:play()
+			rocketpackRun:play()
+		end
+	else 
+		if fuel == 0 then 
+			gameOver = true
+		end
+
+		if collectedCoins == totalCoins then
+			gameOver = true
+			winner = true
+			gamesWon = gamesWon + 1
+		end
+
+		if gameOver then
+			gamesPlayed = gamesPlayed + 1
+		end
+	end
+
+	if fuel > 0 and not gameOver then
+		if love.keyboard.isDown("left") then
+			x = x - playerSpeed/1.75 * dt
+			fuelMod = fuelMod - 2
+		end
+		if love.keyboard.isDown("right") then
+			x = x + playerSpeed * dt
+			fuelMod = fuelMod + 2
+		end
+		if love.keyboard.isDown("up") then
+			y = y - playerSpeed/1.5 * dt
+			fuelMod = fuelMod + 3
+		end
+		if love.keyboard.isDown("down") then
+			y = y + playerSpeed*1.25 * dt
+			fuelMod = fuelMod - 5
+		end
+
+		bgX = bgX - 4
+		if bgX == -800 then 
+			bgX = 0
+
+			if not fuelCanActive and math.random(1,100) < fuelChance then
+				fuelCanActive = true
+			end
+		end
+
+		if fuelCanActive then
+			fuelCanX = fuelCanX - 4
+
+			if fuelCanX < 0 then
+				fuelCanActive = false
+				fuelCanX = 832
+			end
+
+			if math.abs(fuelCanX - x) < 40 and math.abs(534 - y) < 40 then
+		   		fuelCanActive = false
+				fuelCanX = 832
+				fuel = math.min(fuel + fuelBonus, fuelStart)
+
+				if fuelSound:isPlaying() then
+					fuelSound:stop()
+				end
+
+				fuelSound:play()
+		   	end
+		end
+    elseif y < 736 then
+    	y = y + 70 * dt
+    end
+
+    -- keep in bounds
+    if x < 0 then x = 0 end
+    if x > 736 then x = 736 end
+    if y < 18 then y = 18 end
+    if y > 536 then y = 536 end
+
+	if fuel > 0 and not gameOver then
+		for i = 1, totalCoins do
+			if coins[i].alive == 1 then
+				coins[i].x = coins[i].x - levelSpeed * dt
+
+				if coins[i].x < 0 then 
+					coins[i].x = levelLength - coinStartX
+				end
+
+				-- simple collision
+				if math.abs(coins[i].x - x-16) < 40 and math.abs(coins[i].y - y-16) < 40 then 
+					coins[i].alive = 0
+					collectedCoins = collectedCoins + 1
+
+					if coinSound:isPlaying() then
+						coinSound:stop()
+					end
+					coinSound:play()
+		   		end
+			end
+	 	end
+
+ 	 	fuel = math.floor(fuel - dt * math.max(fuelMod, 1))
+
+ 	tuxFly:update(dt)
+ 	end
+
+	coinAnim:update(dt)
+end
+
+function love.draw()
+	love.graphics.setColor(1,1,1,1)
+	love.graphics.draw(imgBackground, bgX, 0)
+	love.graphics.draw(imgBackground, bgX + 800, 0)
+	love.graphics.rectangle("fill", 0, 0, 800, 24)
+
+	if not gameOver then
+		tuxFly:draw(x, y, 0, 1, 1)
+
+		if fuelCanActive then
+			love.graphics.print("GRAB THE FUEL CAN!", 320, 400)
+			love.graphics.draw(imgFuelCan, fuelCanX, 534)
+		end
+	else
+		love.graphics.draw(tuxStand, x, y)
+		love.graphics.setColor(0,0,0,255)
+
+		if winner then
+		  	love.graphics.print("YOU WIN!!", 380, 300)
+		else
+			love.graphics.print("Out of fuel...", 380, 320)
+		end
+
+		love.graphics.print("Hit SPACE to play!", 362, 360)
+		love.graphics.setColor(255,255,255,255)
+	end
+
+	for i = 1, totalCoins do
+    	if coins[i].alive == 1 then
+    		coinAnim:draw(coins[i].x, coins[i].y, 0, 1, 1)
+    	end
+ 	end 
+
+ 	love.graphics.setColor(0,0,0,255)
+    love.graphics.print("Coins: " .. tostring(collectedCoins) .. "/" .. tostring(totalCoins), 5, 5)
+    love.graphics.print("Games Won: " .. tostring(gamesWon) .. "/" .. tostring(gamesPlayed), 170, 5)
+
+    love.graphics.print("Fuel:", 370, 5)
+    love.graphics.setColor(0.2,0.5,0.6,1)
+	love.graphics.rectangle("fill", 400, 2, 390, 20)
+	love.graphics.setColor(0,1,0,1)
+	love.graphics.rectangle("fill", 404, 6, 382 * (fuel/fuelStart) + 1, 12)
+end

main.lua

@@ -187,7 +187,7 @@ function exf.resume()
 	love.mouse.setVisible(true)
 	love.mouse.setCursor()
 	love.window.setTitle("LOVE Example Browser")
-
+	love.audio.stop()
 end