cocos2d-xna学习笔记4
修改游戏程序入口。在AppDelegate里的applicationDidFinishLauching（）方法里添加一句:
pScene.addChild(Tweejump.Classes.MainMenu.node());
public override bool applicationDidFinishLaunching()
{
//initialize director
CCDirector pDirector = CCDirector.sharedDirector();
pDirector.setOpenGLView();
//turn on display FPS
pDirector.DisplayFPS = true;
pDirector.deviceOrientation = ccDeviceOrientation.CCDeviceOrientationPortrait;
// set FPS. the default value is 1.0/60 if you don't call this
pDirector.animationInterval = 1.0 / 60;
// create a scene. it's an autorelease object
CCScene pScene = CCScene.node();
//添加了这句，修改了游戏的入口
pScene.addChild(Tweejump.Classes.MainMenu.node());
//run
pDirector.runWithScene(pScene);
return true;
}
然后在mainmenu.cs里又添加了game.cs的入口
void playCallback(CCObject sender) { CCScene pScene = CCScene.node(); pScene.addChild(Tweejump.Classes.Game.node()); CCDirector.sharedDirector().pushScene(pScene); }
当然，在game.cs里还要添加如下代码：
public static new CCLayer node() { Game ret = new Game(); if (ret.init()) { return ret; } return null; }
接下来还要重写Init方法
public override bool init()；
在init方法里加载了游戏平台（注意，平台是多个且位置不定。见学习笔记2）、小鸟、金币（注意，平台是多个且位置不定。见学习笔记2）等。全部都放在spritesmanager里
在init方法里最重要的方法：this.schedule(step);
schedule，我猜应该是一个实时调用的类，而step里面更新了小鸟是否吃到了金币、小鸟的位移效果等，jump()实现了小鸟踩到平台时的跳跃（y）的变化，
代码：
new void step(float dt) { //？ base.step(dt); if (gameSuspended) return; CCSpriteBatchNode spriteManager = (CCSpriteBatchNode)getChildByTag((int)tags.kSpriteManager); CCSprite bird = (CCSprite)spriteManager.getChildByTag((int)tags.kBird); //小鸟x水平的变化 bird_pos.x += bird_vel.x * dt; #region ---- //if (bird_vel.x < -30f && birdLookingRight) //{ // birdLookingRight = false; // bird.scaleX = -sx; //} //else if (bird_vel.x > 30f && birdLookingRight) //{ // birdLookingRight = true; // bird.scaleX = sx; //} #endregion //480是手机宽度，max_x和min_x设置的理由都是基于小鸟图片大小确立的。 CCSize bird_size = new CCSize(bird.contentSize.width * sx, bird.contentSize.height * sy); float max_x = 480 - bird_size.width / 2; float min_x = 0 + bird_size.width / 2; //当小鸟的x位置大于max_x时，表示已经跨出手机屏幕，故设置最大值为max_x //当小鸟的x位置小于min_x时，表示已经跨出手机屏幕，故设置最小值为min_x if (bird_pos.x > max_x) bird_pos.x = max_x; if (bird_pos.x < min_x) bird_pos.x = min_x; //小鸟垂直坐标变化，为什么如此设置？ bird_vel.y += bird_acc.y * dt; bird_pos.y += bird_vel.y * dt; CCSprite bonus = (CCSprite)spriteManager.getChildByTag((int)tags.kBonusStartTag + currentBonusType); if (bonus.visible) { //吃到金币 CCPoint bonus_pos = bonus.position; float range = 20f; if (bird_pos.x > bonus_pos.x - range && bird_pos.x < bonus_pos.x + range && bird_pos.y > bonus_pos.y - range && bird_pos.y < bonus_pos.y + range) { switch (currentBonusType) { case (int)kbonus.kBonus5: score += 5000; break; case (int)kbonus.kBonus10: score += 10000; break; case (int)kbonus.kBonus50: score += 50000; break; case (int)kbonus.kBonus100: score += 100000; break; } //得分的显示实现-1，游戏中没有动作时分数的更新 string scoreStr = score.ToString(); CCLabelBMFont scoreLabel = (CCLabelBMFont)this.getChildByTag((int)tags.kScoreLabel); scoreLabel.setString(scoreStr); var a1 = CCScaleTo.actionWithDuration(.2f, 1.5f, .8f); var a2 = CCScaleTo.actionWithDuration(.2f, 1.0f, 1f); var a3 = CCSequence.actions(a1, a2, a1, a2, a1, a2); scoreLabel.runAction(a3); this.resetBonus(); } } int t; //当小鸟的高度小于0时，分两种情况：有平台则跳越，没平台且高度低于自身的一半即游戏结束 if (bird_vel.y < 0) { t = (int)tags.kPlatformsStartTag; for (int i = t; i < (int)tags.kPlatformsStartTag + kNumPlatforms; i++) { CCSprite platform = (CCSprite)spriteManager.getChildByTag(i); CCSize platform_size = new CCSize(platform.contentSize.width * sx, platform.contentSize.height * sy); CCPoint platform_pos = platform.position; //max_x和min_x的差分别是一个平台加上20 max_x = platform_pos.x - platform_size.width / 2 - 10; min_x = platform_pos.x + platform_size.width / 2 + 10; float min_y = platform_pos.y + (platform_size.height + bird_size.height) / 2 - kPlatformTopPadding; //platform_pos.y、 min_y、 max_x、 min_x恰好构成了一个平台的范围 if (bird_pos.x > max_x && bird_pos.x < min_x && bird_pos.y > platform_pos.y && bird_pos.y < min_y) { this.jump(); } } //判断游戏结束的条件：即当小鸟的Y低于自身图片的一半时生效 if (bird_pos.y < bird_size.height / 2) { this.gameOver(); } } else //为什么设置400，应该是小鸟跳动的高度 if (bird_pos.y > 400) { float delta = bird_pos.y - 400; bird_pos.y = 400; currentPlatformY -= delta; //更新游戏中云的高度吗？ t = (int)tags.kCloudsStartTag; for (int i = t; i < t + kNumClouds; i++) { CCSprite cloud = (CCSprite)spriteManager.getChildByTag(i); Scale(cloud); CCPoint pos = cloud.position; pos.y -= delta * cloud.scaleY * 0.8f; if (pos.y < -cloud.contentSize.height * sy / 2) { currentCloudTag = i; this.resetCloud(); } else { cloud.position = pos; } } //更新游戏中平台的高度？ t = (int)tags.kPlatformsStartTag; for (int i = t; i < t + kNumPlatforms; i++) { CCSprite platform = (CCSprite)spriteManager.getChildByTag(i); Scale(platform); CCPoint pos = platform.position; pos = new CCPoint(pos.x, pos.y - delta); if (pos.y < -platform.contentSize.height * sy / 2) { currentPlatformTag = i; this.resetPlatform(); } else { platform.position = pos; } } if (bonus.visible) { CCPoint pos = bonus.position; pos.y -= delta; if (pos.y < -bonus.contentSize.height * sy / 2) { this.resetBonus(); } else { bonus.position = pos; } } //得分的显示实现-2，游戏中有动作时分数的更新 score += (int)delta; string scoreStr = score.ToString(); CCLabelBMFont scoreLabel = (CCLabelBMFont)this.getChildByTag((int)tags.kScoreLabel); scoreLabel.setString(scoreStr); } bird.position = bird_pos; }
void jump() { bird_vel.y = 583f + Math.Abs(bird_vel.x); }
后知后觉 后来居上
