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  1. 30th May 2021, 19:50 #1
    nemaider
    nemaider is offline Beginner
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    Apr 2021
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    Qt products
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    Default Program crashes with 0xC0000005 error code

    Hello everyone,

    I have made small computer game using QT in CLion.
    At beginning I show main menu with four rect items created as buttons, I connect it to some slots f.e start() - slot which start game, showHelp() - showing help informations, showScores() - top scores and the last one is quit connected to close() slot.

    Let me explain how my code works - I running for first time application then all items in the main menu working. When I click the start button it bring me to start method and all code from this method working as I wish.
    If the player health is equal 0 or lower program showing gameOverWindow() and in this window have two buttons. One is playAgain and this button restarting game, next one moving to main menu - this menu which are displayed at start of my program.

    The problem that arises is when I click play again button it successful restart game, but sometimes it crashing my application at showGameOverWindow or after when I back to mainMenuWindow with those error information:
    pure virtual method called terminate called without an active exception
    but not always, sometimes it's this exit code:
    Process finished with exit code -1073741819 (0xC0000005)
    When it doesn't crash after that cases program will always crash after clicking any button in mainMenu without play game button.

    Any help would be appreciated

    Source code:

    Code which checking health is under or equal 0
    Qt Code: 
    1. //some useless code before
    2. if (game->health->getHealth() <= 0){
    3.                 int score = game->score->getScore();
    4.  
    5.                 game->scene->clear();
    6.                 game->ShowGameOverWindow(score);
    7. }
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    ShowGameOverWindow
    Qt Code: 
    1. void Game::ShowGameOverWindow(int score){
    2.     setBackgroundBrush(QImage("../Sources/Pictures/gameover.png"));
    3.     float height = window()->height();
    4.     float width = window()->width();
    5.  
    6.     drawPanel(0,0,860,600,Qt::black,0.35);
    7.     drawPanel(width/4+30,height/4,400,400,Qt::lightGray,0.75);
    8.  
    9.     backMenuButton = new Button(QString("../Sources/Pictures/Menu/ok-inactive.png"),
    10.                             QString("../Sources/Pictures/Menu/ok-active.png"));
    11.     int qxPos = width-320;
    12.     int qyPos = height-110;
    13.     backMenuButton->setPos(qxPos, qyPos);
    14.     connect(backMenuButton, SIGNAL(clicked()), this, SLOT(displayMainMenu()));
    15.     scene->addItem(backMenuButton);
    16.  
    17.     playAgainButton = new Button(QString("../Sources/Pictures/Menu/again-inactive.png"),
    18.                             QString("../Sources/Pictures/Menu/again-active.png"));
    19.     int pxPos = width/3-30;
    20.     int pyPos = height-110;
    21.     playAgainButton->setPos(pxPos, pyPos);
    22.     playAgainButton->setSize(200,51);
    23.     connect(playAgainButton,SIGNAL(clicked()), this, SLOT(start()));
    24.     scene->addItem(playAgainButton);
    25. }
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    start game slot
    Qt Code: 
    1. void Game::start() {
    2.     scene->clear();
    3.  
    4.     scene->setSceneRect(0,0,800,600);
    5.     setFixedSize(800,600);
    6.     setBackgroundBrush(QImage("../Sources/Pictures/gameBackground.png"));
    7.  
    8.     player = new Player();
    9.     player->setFlag(QGraphicsItem::ItemIsFocusable);
    10.     player->setFocus();
    11.     player->resetPos();
    12.     scene->addItem(player);
    13.  
    14.     score = new Score();
    15.     score->resetScore();
    16.     score->setPos(score->x()+600, score->y()+9);
    17.     scene->addItem(score);
    18.  
    19.     health = new Health();
    20.     health->resetHealth();
    21.     health->setPos(health->x()+380, health->y()+9);
    22.     scene->addItem(health);
    23.  
    24.     if(!mainTimer->isActive()) {
    25.         connect(mainTimer, SIGNAL(timeout()), this, SLOT(mainLoop()));
    26.         mainTimer->start(0);
    27.     }
    28.     counting(1000);
    29.  
    30.     auto * timerHurdle = new QTimer();
    31.     QObject::connect(timerHurdle,SIGNAL(timeout()),player,SLOT(spawnHurdle()));
    32.     timerHurdle->start(2000);
    33.  
    34.     auto * timerHeart = new QTimer();
    35.     QObject::connect(timerHeart,SIGNAL(timeout()),player,SLOT(spawnHeart()));
    36.     timerHeart->start(10000);
    37. }
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    Display main menu
    Qt Code: 
    1. void Game::displayMainMenu() {
    2.     scene->clear();
    3.  
    4.     scene->setSceneRect(0,0,1030,768);
    5.     setFixedSize(1030,768);
    6.     setBackgroundBrush(QImage("../Sources/Pictures/Menu/background.png"));
    7.  
    8.     // buttons and properties
    9.     playButton = new Button(QString("../Sources/Pictures/Menu/start-inactive.png"),
    10.                             QString("../Sources/Pictures/Menu/start-active.png"));
    11.     int bxPos = playButton->boundingRect().width()/8 + 3;
    12.     int byPos = 380;
    13.     playButton->setPos(bxPos, byPos);
    14.     connect(playButton,SIGNAL(clicked()), this, SLOT(start()));
    15.     scene->addItem(playButton);
    16.  
    17.     scoreButton = new Button(QString("../Sources/Pictures/Menu/scores-inactive.png"),
    18.                              QString("../Sources/Pictures/Menu/scores-active.png"));
    19.     int sxPos = scoreButton->boundingRect().width()/8 + 3;
    20.     int syPos = 450;
    21.     scoreButton->setPos(sxPos, syPos);
    22.     connect(scoreButton,SIGNAL(clicked()), this, SLOT(showScores()));
    23.     scene->addItem(scoreButton);
    24.  
    25.     helpButton = new Button(QString("../Sources/Pictures/Menu/help-inactive.png"),
    26.                             QString("../Sources/Pictures/Menu/help-active.png"));
    27.     int hxPos = helpButton->boundingRect().width()/8 + 3;
    28.     int hyPos = 520;
    29.     helpButton->setPos(hxPos, hyPos);
    30.     connect(helpButton,SIGNAL(clicked()), this, SLOT(showHelp()));
    31.     scene->addItem(helpButton);
    32.  
    33.  
    34.     quitButton = new Button(QString("../Sources/Pictures/Menu/quit-inactive.png"),
    35.                             QString("../Sources/Pictures/Menu/quit-active.png"));
    36.     int qxPos = quitButton->boundingRect().width()/8 + 3;
    37.     int qyPos = 610;
    38.     quitButton->setPos(qxPos, qyPos);
    39.     connect(quitButton,SIGNAL(clicked()), this, SLOT(close()));
    40.     scene->addItem(quitButton);
    41.  
    42.     backButton = new Button(QString("../Sources/Pictures/Menu/back-inactive.png"),
    43.                             QString("../Sources/Pictures/Menu/back-active.png"));
    44.     int backxPos = scene->width()/2 - 40;
    45.     int backyPos = 610;
    46.     backButton->setPos(backxPos, backyPos);
    47.     connect(backButton,SIGNAL(clicked()), this, SLOT(displayMainMenu()));
    48.     scene->addItem(backButton);
    49.  
    50.     parchmentImage = new QLabel();
    51.     QPixmap img("../Sources/Pictures/Menu/paper.png");
    52.     parchmentImage->setPixmap(img);
    53.  
    54.  
    55.     double x = img.width();
    56.     double y = img.height();
    57.     parchmentImage->setGeometry(300,250,x,y);
    58.     scene->addWidget(parchmentImage);
    59.  
    60.     info = new TextInformation();
    61.     info->setPosition(300,270);
    62.     scene->addItem(info);
    63.  
    64.  
    65.     if(backButton->isVisible()) { scene->removeItem(backButton); }
    66.     if(info->isVisible())       { scene->removeItem(info); }
    67.  
    68.  
    69.     info->setProperties(Qt::black,"arial",16,300,270);
    70.     parchmentImage->setHidden(true);
    71.  
    72.  
    73.     playButton->setEnabled(true);
    74.     scoreButton->setEnabled(true);
    75.     helpButton->setEnabled(true);
    76.     quitButton->setEnabled(true);
    77.  
    78. }
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    If the problem is too hard to imagine I can make short video to show you how I really looks or even paste more source code.
    Last edited by nemaider; 30th May 2021 at 22:14.
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