Question

当我在游戏运行时尝试创建射弹时，会弹出两条Microsoft Visual C ++运行时库消息

Debug Assertion Failed! Program: C:\WINDOWS\SYSTEM32\MSVCP120D.dll
File: c:\program files (x86)\microsoft visual studio
12.0\vc\include\vector Line:1201 Expression: vector subscript out of range

和

Debug Assertion Failed!
Program: C:\SFML-2.3.2\SFML\Debug\SFML.exe
File: c:\program files (x86)\microsoft visual studio 12.0\vc\include\vector
Line:1202
Expression: "Standard C++ Libraries Out of Range" && 0

然后是Microsoft Visual Studio Express 2013的消息：

SFML.exe中0x5B89A893（msvcr120d.dll）的未处理异常：无效参数传递给认为无效的函数参数致命。

只要按空格键创建弹丸（绿色方块），就会发生这种情况。绿色方块出现在屏幕上，然后立即弹出消息。此时使用当前代码的抛射物应该表现为绿色方形画笔，但会弹出此消息。这是我的源代码：

主：

int main ( )

{
int counter1 = 0;
int counter2 = 0;
int counter3 = 0;

//create the main window

sf::RenderWindow window(sf::VideoMode(640, 480), "SFML Demo");

sf::Event event;

sf::Vector2i source(1, 0);

//load texture

sf::Texture texturePlayer;

if (!texturePlayer.loadFromFile("images/player.png"))
    return EXIT_FAILURE;

//class object
class player Player1;
Player1.sprite.setTexture(texturePlayer);

//Projectile vector array
vector<projectile>::const_iterator iter;
vector<projectile> projectileArray;

//projectile object

class projectile projectile1;


while ( window.isOpen() )
{
    while (window.pollEvent(event))
    {
        if ( event.type == sf::Event::EventType::Closed )
            window.close();
    }
    window.clear();

    //fire missile (space bar)
    if (sf::Keyboard::isKeyPressed(sf::Keyboard::Space))
    {
        projectile1.rect.setPosition(Player1.rect.getPosition());
        projectileArray.push_back(projectile1);
    }

    //Draw projectile
    for (iter = projectileArray.begin(); iter != projectileArray.end(); iter++)
    {
        window.draw(projectileArray[counter1].rect);
        counter1++;
    }


    //update player with rectangle collision detection
    Player1.update();  
    Player1.updateMovement();


    //window.draw(Player1.rect);
    window.draw(Player1.sprite);
    window.display();


 }

}

projectile.h

class projectile：公共实体//从实体继承 { 公共：

float movementSpeed = 10;
int attackDamage = 5;

projectile();               //constructor
//void update();
//void updateMovement();
};

#endif

projectile.cpp

    projectile::projectile() {

rect.setSize(sf::Vector2f(10.0, 10.0));

rect.setFillColor(sf::Color::Green);

rect.setPosition(0, 0);

//sprite.setTextureRect(sf::IntRect(0, 0, 32, 32)); }

我该如何解决这个问题？任何建议/帮助非常感谢。提前致谢

Answer 1

在周期Draw projectile中您必须使用或迭代器来访问projectileArray中的元素

for (iter = projectileArray.begin(); iter != projectileArray.end(); iter++)
{
    window.draw(iter->rect);
}

或在周期之前初始化counter1=0;否则在主while counter1的第二次迭代中将不会指向向量projectileArray的开头。

在弹丸制作过程中向量下标超出范围

主：

projectile.h

projectile.cpp

1 个答案: