Showing posts with label Gameover calculate scores add sounds for game effervescent. Show all posts
Showing posts with label Gameover calculate scores add sounds for game effervescent. Show all posts

Wednesday, January 21, 2015

[Tutorial] Cocos2d-x: Create the first simple game - Gameover, calculate scores, add sounds for game effervescent (Part 4)

In this last part, we do all remaining tasks:

+ Check game-Over when monsters collide character
+ Add sound when shooting bullets and add some background music for more attractive.
+ Here skip calculating scores. This lesson is only in simple level.

Now let's start!!!!!


Step 1 - Add sound into game

You Download resource, copy into folder Resource of Project
Then open file HelloWordScene.cpp, in function init(), add the following lines

CocosDenshion::SimpleAudioEngine::getInstance()->preloadBackgroundMusic("background-music-aac.wav");
CocosDenshion::SimpleAudioEngine::getInstance()->playBackgroundMusic("background-music-aac.wav",true); // True = unlimited loop


Find to function onTouchEnded(), add the following lines


CocosDenshion::SimpleAudioEngine::getInstance()->preloadEffect("pew-pew-lei.wav");

CocosDenshion::SimpleAudioEngine::getInstance()->playEffect("pew-pew-lei.wav");

Add a command #include"SimpleAudioEngine.h" after first "#include" .

Step 2 - Create GameOver scene

you create a new Scene named GameOverScene.h and GameOverScene.cpp like this, Download Class


Now view a bit the two files:

* Open file GameOverScene.h, declare 2 Classes GameOverLayer, and GameOverScene, with constructor, destructor, init() function.

But, you should notice the two commands:

CC_SYNTHESIZE_READONLY(cocos2d::LabelTTF*, _label, Label); (1)

CC_SYNTHESIZE_READONLY(GameOverLayer*, _layer, Layer); (2)

It's rather difficult to see, but we can see as follow:

(1) create a variable _label with type LabelTTF* through a method of Label class

(2) create a variable _layer with type GameOverLayer* tthrough a method of Layer class

It's simple like so, you can study more about function Inline here

* Open file GameOverScene.cpp, destructor (with the mark ~ ), simply release the pointers of class to release memory.

Consider function Init()
GameOverScene::init(), create a new Scene with new Layer
GameOverLayer::init(), create a layer with white color - Color4B(255,255,255,255)

Color3B create color of RGB from 3 input params. Color4B create color of RGBA from 4 input params, there the last param will adjust opacity.

This block: 

this->runAction( Sequence::create(
                                DelayTime::create(3),
                                CallFunc::create(this, 
                                callfunc_selector(GameOverLayer::gameOverDone)),
                                NULL));

is to create 2 Actions continuously
+ delay 3 seconds: DelayTime::create(3)
+ Then CallFunc::create(this, callfunc_selector(GameOverLayer::gameOverDone)), // call function gameOverDone

The function gameOverDone() do only task to replace GameOverScene by new Game Scene to continue playing

void GameOverLayer::gameOverDone()
{
    Director::getInstance()->replaceScene(HelloWorld::createScene()); // Create a new Game Scene
}


You open file HelloWordScene.cpp, find to function onContactBegin(), in the code block:

// Character that is collided by monsters
if((tag==1&tag1==2)||(tag==2&tag1==1))
 {
// process GameOver
// calculate scores
 }

Add the following code block

auto gameOverScene = GameOverScene::create(); // Create a Scene Over of GameOverScene class
gameOverScene->getLayer()->getLabel()->setString("You Lose :["); // Set a message on the screen
Director::getInstance()->replaceScene(gameOverScene); // Replace game Scene by  game Over Scene 

Remember to add "#include"GameOverScene.h" in #include lines.

Before compiling and running, you must do the following task:

+ Build Android, open file Android.mk in the path firstgame\proj.android\jni\Android.mk add this line ../../Classes/GameOverScene.cpp below the line ../../Classes/HelloWorldScene.cpp
+ Build Win32: open file firstgame.vcxproj in the path firstgame\proj.win32\firstgame.vcxproj add the two following lines:

<ClCompile Include="..\Classes\GameOverScene.h" /> below the line <ClCompile Include="..\Classes\HelloWorldScene.h" />

<ClCompile Include="..\Classes\GameOverScene.cpp"/> below the line <ClCompile Include="..\Classes\HelloWorldScene.cpp" />

Now build and run 

And ... error 

You should add USING_NS_CC; below the lines "#include" in GameOverScene.h ( each .h file should be added it ).

Done, build and run now is OK.

























Posted By Dev Bananaer7:52 AM

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