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Node Body boundary problem

MoseHas

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Problem Description

Hi there. Got a new question again.

In the tutorial “Game Scene Background” in Flappy Bird tutorial series, the demo showed me the perfect red boundary line just exactly at the edges of the display window. However, I wrote the same code and my rectangle flew up.

This is the original one.

This is the one I manually reset the vaue of the y axis.

And the code as follows.

#include "GameScene.h"

USING_NS_CC;

Scene* GameScene::createScene()
{
    // 'scene' is an autorelease object
    auto scene = Scene::createWithPhysics();
	scene->getPhysicsWorld()->setDebugDrawMask(PhysicsWorld::DEBUGDRAW_ALL);
    
    // 'layer' is an autorelease object
	auto layer = GameScene::create();
	layer->SetPhysicsWorld(scene->getPhysicsWorld());

    // add layer as a child to scene
    scene->addChild(layer);

    // return the scene
    return scene;
}

// on "init" you need to initialize your instance
bool GameScene::init()
{
    //////////////////////////////
    // 1. super init first
    if ( !Layer::init() )
    {
        return false;
    }
    
    Size visibleSize = Director::getInstance()->getVisibleSize();
    Vec2 origin = Director::getInstance()->getVisibleOrigin();
    
	auto backgroundSprite = Sprite::create("background.jpg");
	backgroundSprite->setPosition(visibleSize.width / 2 + origin.x, visibleSize.width / 2 + origin.y - 120);
	backgroundSprite->setScale(0.93);
	this->addChild(backgroundSprite);

	auto edgeBody = PhysicsBody::createEdgeBox(visibleSize, PHYSICSBODY_MATERIAL_DEFAULT, 3);

	auto edgeNode = Node::create();
	edgeNode->setPosition(visibleSize.width / 2 + origin.x, visibleSize.width / 2 + origin.y/* - 160*/);

	edgeNode->setPhysicsBody(edgeBody);

	this->addChild(edgeNode);

    return true;
}

I have to manually subtract 160 to make it perfectly fit in.

And when I added the background image I had faced the same problem. My image flew up out of the window as well.

In the beginning I thought that my image’s resolution might not be correctly fit, so I subtract 120 from the height of y.

Don’t know what is going on right now. Hope it was not another stupid rookie mistake.

Thanks. Wish good.

Sonar Systems admin

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That’s crazy weird, could you show us the code in the AppDelegate.cpp please.

MoseHas

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Sure. Here is my AppDelegate.cpp.

#include "AppDelegate.h"
#include "SplashScene.h"

USING_NS_CC;

AppDelegate::AppDelegate() {

}

AppDelegate::~AppDelegate() 
{
}

//if you want a different context,just modify the value of glContextAttrs
//it will takes effect on all platforms
void AppDelegate::initGLContextAttrs()
{
    //set OpenGL context attributions,now can only set six attributions:
    //red,green,blue,alpha,depth,stencil
    GLContextAttrs glContextAttrs = {8, 8, 8, 8, 24, 8};

    GLView::setGLContextAttrs(glContextAttrs);
}

// If you want to use packages manager to install more packages, 
// don't modify or remove this function
static int register_all_packages()
{
    return 0; //flag for packages manager
}

bool AppDelegate::applicationDidFinishLaunching() {
    // initialize director
    auto director = Director::getInstance();
    auto glview = director->getOpenGLView();
    if(!glview) {
        glview = GLViewImpl::create("My Game");
        director->setOpenGLView(glview);
    }

    // turn on display FPS
    director->setDisplayStats(true);

    // set FPS. the default value is 1.0/60 if you don't call this
    director->setAnimationInterval(1.0 / 60);

    register_all_packages();

    // create a scene. it's an autorelease object
    auto scene = SplashScene::createScene();

    // run
    director->runWithScene(scene);

    return true;
}

// This function will be called when the app is inactive. When comes a phone call,it's be invoked too
void AppDelegate::applicationDidEnterBackground() {
    Director::getInstance()->stopAnimation();

    // if you use SimpleAudioEngine, it must be pause
    // SimpleAudioEngine::getInstance()->pauseBackgroundMusic();
}

// this function will be called when the app is active again
void AppDelegate::applicationWillEnterForeground() {
    Director::getInstance()->startAnimation();

    // if you use SimpleAudioEngine, it must resume here
    // SimpleAudioEngine::getInstance()->resumeBackgroundMusic();
}

Actually I do not remember I have changed anything except replacing every HelloWorldScene by SplashScene (In tutorial #2: Creating The Scene about 2:50).

And I have just finished watching Pipe Class Creation. Same problem showed up when I tried to create a Pipe sprite. I have only my topPipe and bottomPipe is gone! I assume it is the same problem as my NodeBody boundary.

Thankks for your replying.

MoseHas

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Ah… awkard things happened.

I imported the sorce code you provided below the video and it did work correctly.

Get so frustrated and still don’t know why.

Sonar Systems admin

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so is it working and you are happy?

MoseHas

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Working correctly but not so happy though.

Wanna understand why strange things happened.

Well, someday I will have to handle a program my own, so I try my best to prevent bugs.

Well, thanks anyway.

This reply has been verified.

Sonar Systems admin

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That’s programming for you :D