test driven game development silly, stupid or inspired?

Tuesday, August 13, 13

//// build composite position//! movl! ebp,[_ds_xfrac]! shll! ebp,10! andl! ebp,0ffff0000h! movl! eax,[_ds_yfrac]! shrl! eax,6! andl! eax,0ffffh! orl!ebp,eax

! movl! esi,[_ds_source]

//// calculate screen dest//! movl! edi,[_ds_y]! movl! edi,[_ylookup+edi*4]! movl! eax,[_ds_x1]! addl edi,[_columnofs+eax*4]

//// build composite step//! movl! ebx,[_ds_xstep]! shll! ebx,10! andl! ebx,0ffff0000h! movl! eax,[_ds_ystep]! shrl! eax,6! andl! eax,0ffffh! orl!ebx,eax

! movl! ! eax,OFFSET hpatch1+2! ! // convice tasm to modify code...! movl! ! [eax],ebx! movl! ! eax,OFFSET hpatch2+2! ! // convice tasm to modify code...! movl! ! [eax],ebx

// eax!! aligned colormap// ebx!! aligned colormap// ecx,edx! scratch// esi!! virtual source// edi!! moving destination pointer// ebp!! frac

! shldl ecx,ebp,22!


TDD and GamesSilly, Stupid or Inspired?


var context, spaceBackground, player, bulletImage, spiderImage, bullets = [], spiders = [], startTicks, lastGeneration, laserBeam, gameOn = true, explosion, pop, backgroundMusicTuesday, August 13, 13

Scheduler ◦ schedules method called for repeated calls: ✓ schedules method called for repeated calls ◦ clears the interval when stop is called: ✓ clears the interval when stop is called ◦ calls that method with the tick rate: ✓ calls that method with the tick rate (200ms) ◦ returns the time for tics: ✓ returns the time for tics ◦ returns its tick time: ✓ returns its tick time

99 tests complete (743 ms)Done. Build script exited with 0


Eskimo!


?Tuesday, August 13, 13

it("uses an associated loader to create a level object, if one exists", function() { var gameDescription = { "newLevel": { "gameObject" : { "customObject" : {} } } };

var customObjectLoader = { load: function(levelSpec, objectName, level, callback) { callback(objectName, {levelSpec: levelSpec, objectName: objectName, level: level}); } }; var gameSpec = new GameSpec({ assetDefinition: gameDescription }); gameSpec.registerLoader('customObject', customObjectLoader);

gameSpec.load("newLevel", function(level) { var loadedObject = level.gameObject('gameObject'); assert.strictEqual(loadedObject.level, level); }); });


KEEPIT

SIMPLESTUPID


Hunting


Console DLL Game Logic


[Test] public void ItMovesAnArrowInTheCommandedDirection() { var presenter = Substitute.For<Presenter>(); var map = new Map(); var game = new Game(presenter, map); game.SetPlayerQuiver(1);

map.PlaceItem(0, MapItems.Player); map.AddPath(0, 1, Command.Directions.East);

game.Command(new Command { Direction = Command.Directions.East, Order = Command.Commands.Shoot});

Assert.AreEqual(MapItems.Arrow, map.ItemsInCavern(1)[0]); }


protected void Rest() { DisplayAvailableDirections(); DisplayArrowStatus(); }


Feeling Good


Cubicle Wars


UnityMakes your life easier when it’s not making it harder


Scripts


public class NewScript : MonoBehaviour {

// Use this for initialization void Start () { } // Update is called once per frame void Update () { }}


void Awake() { stateMachine = new CubicleWarsStateMachine( new HumanPlayer("Player1"), new HumanPlayer("Player2"));


! ! [Test]! ! public void ItAllowsAddingAUnitToAPlayer()! ! {! ! ! var unit = Substitute.For<Unit>();

! ! ! stateMachine.AddUnitToPlayer("PlayerOne", unit);! ! ! stateMachine.AddUnitToPlayer("PlayerTwo", unit);

! ! ! playerOne.Received().AddUnit(unit);! ! ! playerTwo.Received().AddUnit(unit);! ! }


Updating the View


Update the View

public void Attack(Unit unit)! ! {! ! ! if (CurrentState == State.Attacking)! ! ! {! ! ! ! unit.AttackWith(CurrentPlayer.Weapon());


Shared Interfaces


C# Eventspublic delegate void GameOverEvent(String winner);

...

public event GameOverEvent GameOver = delegate { };

...

private void AnnouncePlayerWins(){

GameOver(CurrentPlayer.Name);}


Wiring the Eventsmachine.GameOver += delegate(string winner) {winMessage.SendMessage("ShowWinner", String.Format("{0} wins!", winner));

};


Health


“MVC”


void Update() { // Each update checks if we are waiting, and if so // modulates the color based on the sin wave and the // current time. if (StartWaiting) { renderer.material.color =

tint * wave.at(Time.time); }}


Effectspublic class SineWave

{! protected float Amplitude { get; set; }! protected float Frequency { get; set; }! protected float Offset { get; set; }

! public SineWave(float amplitude, float frequency, float offset)! {! ! Amplitude = amplitude;! ! Frequency = frequency;! ! Offset = offset;! }

! public float at(float time)! {! ! return (Amplitude * (float)Math.Sin(Frequency * time)) + Offset;! }}


Effects[Test]public void ItReturnsANormalSinWaveOnTime(){! var sineWave = new SineWave(1, 1, 0);

! Assert.AreEqual(0, sineWave.at(0));! Assert.AreEqual(1, sineWave.at((float) Math.PI / 2.0f));}


Hypothesis


-(void) notifyOfSuccessfulDay{ [self.presenter gameOver:Successful];}

-(void) notifyOfFailedDay{ [self.presenter gameOver:Failed];}

-(void) notifyOfKidDeath{ [self.presenter kidsKilledYou];}

-(void) notifyOfWorkDeath{ [self.presenter workKilledYou];}


It(@"Will inform the employee of clock ticks when the turn ends", ^{ id daddy = [OCMockObject niceMockForProtocol:@protocol(Freelancer)];

WorkdayStateMachine *machine = [WorkdayStateMachine machineWithFreeLancer:daddy presenter:nil]; [machine start];

[[daddy expect] clockTicked];

[machine endTurn];

[daddy verify]; });


It(@"is fun", ^{ [ExpectBool(game.fun) toBeTrue];})


FTT

• Forget

• The

• Tests


Sprite *sprite = Sprite::createWithTexture(batchNode->getTexture()); sprite->setPosition(ccp(0, 60)); batchNode->addChild(sprite, 0, kTopBucket); sprite = Sprite::createWithTexture(batchNode->getTexture()); sprite->setPosition(ccp(0, 0)); batchNode->addChild(sprite, 0, kMiddleBucket); sprite = Sprite::createWithTexture(batchNode->getTexture()); sprite->setPosition(ccp(0, -60)); batchNode->addChild(sprite, 0, kBottomBucket);


Design Phase


Bugs


Not the Hard Part


Throw It Out!


It(@"lets the lesson know about an incorrect guess if this is the wrong card", ^{ [[lesson expect] incorrectGuess]; [card tap]; [lesson verify]; });

-(void) tap{ self.current ? [self.lesson correctGuess] : [self.lesson incorrectGuess];}


-(BOOL) ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event{ CGSize textureSize = [self.texture contentSizeInPixels]; if ([Card contains: [self convertTouchToNodeSpaceAR:touch]

inTextureSize:textureSize]) { [self setScale:1.2f]; return true; } return false;}

-(void) ccTouchEnded:(UITouch *)touch withEvent:(UIEvent *)event{ [self setScale:1.0f]; [self.card tap];}


<p> <strong>Title:</strong> <%= @post.title %></p> <p> <strong>Text:</strong> <%= @post.text %></p>


<%= form_for :post, url: posts_path do |f| %> <% if @post.errors.any? %> <div id="errorExplanation"> <h2><%= pluralize(@post.errors.count, "error") %> prohibited this post from being saved:</h2> <ul> <% @post.errors.full_messages.each do |msg| %> <li><%= msg %></li> <% end


Expect(game) toBeFun


@paytonruleswww.paytonrules.comwww.8thlight.comwww.github.com/paytonrules


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August 11th – 13th 2014Same Place, Same Time


test driven game development silly, stupid or inspired?

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