SFML/C++雪碧在某些點後消失

int main() { 
sf::RenderWindow window; 

sf::Vector2i centerWindow((sf::VideoMode::getDesktopMode().width/2) - 445, (sf::VideoMode::getDesktopMode().height/2) - 480); 

window.create(sf::VideoMode(900, 900), "SFML Game", sf::Style::Titlebar | sf::Style::Close); 
window.setPosition(centerWindow); 

window.setKeyRepeatEnabled(true); 

sf::Texture wallTxture; 
sf::Sprite wall; 
if (!wallTxture.loadFromFile("wall.png")) { 
    std::cerr << "Error\n"; 
} 
wall.setTexture(wallTxture); 

//Gravity Vars: 
int groundHeight = 750; 
bool isJumping = false; 

//Movement Vars: 
bool goingRight = false; 
bool goingLeft = false; 

//Set View Mode: 
sf::View followPlayer; 
followPlayer.reset(sf::FloatRect(0, 0, window.getSize().x, window.getSize().y)); 

Player player("newPlayer.png"); 
player.setPos({ 800, 800 }); 

sf::Vector2f position(window.getSize().x/2, window.getSize().y/2); 

//Main Loop: 
while (window.isOpen()) { 

    const float moveSpeed = 0.1; 

    sf::Event Event; 

    if (sf::Keyboard::isKeyPressed(sf::Keyboard::Up)) { 
     isJumping = true; 
     //Handle Movement While Jumping: 
     if (goingLeft == true) { 
      player.move({ -moveSpeed, -moveSpeed }); 
     } 
     else if (goingRight == true) { 
      player.move({ moveSpeed, -moveSpeed }); 
     } 
     else { 
      player.move({ 0, -moveSpeed }); 
     } 
    } 
    else if (sf::Keyboard::isKeyPressed(sf::Keyboard::Down)) { 
     player.move({ 0, moveSpeed }); 
    } 
    else if (sf::Keyboard::isKeyPressed(sf::Keyboard::Left)) { 
     player.move({ -moveSpeed, 0 }); 
     goingLeft = true; 
     player.flipX('l'); 
    } 
    else if (sf::Keyboard::isKeyPressed(sf::Keyboard::Right)) { 
     player.move({ moveSpeed, 0 }); 
     goingRight = true; 
     player.flipX('r'); 
    } 

    //Event Loop: 
    while (window.pollEvent(Event)) { 
     switch (Event.type) { 

     case sf::Event::Closed: 
      window.close(); 

     case sf::Event::KeyReleased: 
      if (Event.key.code == sf::Keyboard::Up) { 
       isJumping = false; 
      } 
      else if (Event.key.code == sf::Keyboard::Left) { 
       goingLeft = false; 
      } 
      else if (Event.key.code == sf::Keyboard::Right) { 
       goingRight = false; 
      } 
     } 

    } 

    if (player.getX() > window.getSize().x) { 
     position.x = player.getX(); 
    } 
    else { 
     position.x = window.getSize().x; 
    } 

    //If player is in air and not jumping: 
    if (player.getY() < groundHeight && isJumping == false) { 
     player.move({ 0, moveSpeed }); 
    } 

    followPlayer.setCenter(position); 

    window.clear(); 
    window.setView(followPlayer); 
    window.draw(wall); 
    player.drawTo(window); 
    window.display(); 
} 
}

這是我的代碼。我想要做的是創建一個2D平臺的sidescroller。一切正常，除非精靈經過某個點時它會消失。當我在同一時間跳躍並在空中移動時也會發生這種情況。我不明白爲什麼會發生這種情況，任何幫助將不勝感激:)SFML/C++雪碧在某些點後消失

來源

2016-07-11 Benjamin Bollinger

它始終是有用的：1.適當地格式化SO代碼（您可以使用代碼按鈕將所有代碼4空格右移）。 2.解釋代碼在做什麼。 3.由於你的問題是精靈，截圖將是非常有用的。 – grochmal

我的代碼是創建一個播放器，然後相機在他移動時跟隨播放器，然後在某個點後播放器因某種原因消失。我在這裏做了一個簡短的介紹：https://www.youtube.com/watch?v=YrDB7uwItIY&feature=youtu.be –

我發現這個問題，很好。出於某種原因，當我將我爲我的播放器類創建的flipX函數加入時，會發生此錯誤。所以現在我有一個新問題。爲什麼這個功能會導致這個問題： –

我通過擺脫我的flipX函數解決了問題，而只是創建一個面向不同方向的新精靈，然後每次都改變它用戶正面臨新的方向

來源

2016-07-12 04:54:44

SFML/C++雪碧在某些點後消失

回答

相關問題