Question

我只是在玩C ++ SFML的东西，我有点不明白为什么我的代码不起作用。我想要做的就是画出像5，窗口中的方块随机放在屏幕上使用矢量，但我不明白它为什么不起作用。

这是主要的游戏类：

#include "main_game.h"
#include "main_menu.h"

void main_game::Initialize(sf::RenderWindow* window)
{
    this->Player = new player();
    this->Player->setOrigin(this->Player->getGlobalBounds().width / 2, this->Player->getGlobalBounds().height / 2);

    this->TestObject = new testObject();
    this->TestObject->Initialize();
    this->TestObject->setOrigin(this->TestObject->getGlobalBounds().width / 2, this->TestObject->getGlobalBounds().height / 2);
}

void main_game::Update(sf::RenderWindow* window)
{
    this->Player->setPosition(sf::Mouse::getPosition(*window).x, sf::Mouse::getPosition(*window).y);
    this->Player->Update();

    if (this->Player->CheckCollision(TestObject))
    {
        this->TestObject->setColor(sf::Color::Red);
    }
    else
    {
        this->TestObject->setColor(sf::Color::Cyan);
    }

    if (sf::Keyboard::isKeyPressed(sf::Keyboard::Key::Escape))
    {
        coreState.SetState(new main_menu());
    }
}

void main_game::Render(sf::RenderWindow* window, std::vector<sf::Sprite> sprites)
{
    this->TestObject->Render(*window, sprites);

    window->draw(*this->Player);
}

void main_game::Destroy(sf::RenderWindow* window)
{
    delete this->Player;
    delete this->TestObject;
}

这是testObject.h类

#pragma once

#include "entity.h"

class testObject : public Entity
{
public:
    testObject();
    void Initialize();
    void Render(sf::RenderWindow window, std::vector<sf::Sprite> sprites);
    void Update();
private:
    sf::RenderWindow window;
};

这是testObject.cpp类

#include "testObject.h"

testObject::testObject()
{
    this->Load("testObject.png");
}

void testObject::Initialize()
{
    sf::Texture testObjectTexture;
    sf::Sprite testObjectSprite;

    testObjectTexture.loadFromFile("testObject.png");
    testObjectSprite.setTexture(testObjectTexture);

    std::vector<sf::Sprite> sprites(5, sf::Sprite(testObjectSprite));

    srand(time(0));

    for (unsigned int i = 0; i < sprites.size(); i++)
    {
        sprites[i].setPosition(1 + (rand() % 1024 - 32), rand() % 640 - 32);
    }
}

void testObject::Render(sf::RenderWindow window, std::vector<sf::Sprite> sprites)
{
    for (unsigned int i = 0; i < sprites.size(); i++)
    {
        window.draw(sprites[i]);
    }
}

void testObject::Update()
{
    Entity::Update();
}

错误消息是

1>------ Build started: Project: Blahblah, Configuration: Debug Win32 ------
1>  testObject.cpp
1>d:\visual studio projects\blahblah\blahblah\testobject.cpp(18): warning C4244: 'argument' : conversion from 'time_t' to 'unsigned int', possible loss of data
1>d:\visual studio projects\blahblah\blahblah\testobject.cpp(22): warning C4244: 'argument' : conversion from 'int' to 'float', possible loss of data
1>  main_game.cpp
1>d:\visual studio projects\blahblah\blahblah\main_game.cpp(16): warning C4244: 'argument' : conversion from 'int' to 'float', possible loss of data
1>d:\visual studio projects\blahblah\3rdpartylibs\include\sfml\window\window.hpp(521): error C2248: 'sf::NonCopyable::NonCopyable' : cannot access private member declared in class 'sf::NonCopyable'
1>          d:\visual studio projects\blahblah\3rdpartylibs\include\sfml\system\noncopyable.hpp(67) : see declaration of 'sf::NonCopyable::NonCopyable'
1>          d:\visual studio projects\blahblah\3rdpartylibs\include\sfml\system\noncopyable.hpp(42) : see declaration of 'sf::NonCopyable'
1>          This diagnostic occurred in the compiler generated function 'sf::Window::Window(const sf::Window &)'
1>d:\visual studio projects\blahblah\3rdpartylibs\include\sfml\graphics\rendertarget.hpp(419): error C2248: 'sf::NonCopyable::NonCopyable' : cannot access private member declared in class 'sf::NonCopyable'
1>          d:\visual studio projects\blahblah\3rdpartylibs\include\sfml\system\noncopyable.hpp(67) : see declaration of 'sf::NonCopyable::NonCopyable'
1>          d:\visual studio projects\blahblah\3rdpartylibs\include\sfml\system\noncopyable.hpp(42) : see declaration of 'sf::NonCopyable'
1>          This diagnostic occurred in the compiler generated function 'sf::RenderTarget::RenderTarget(const sf::RenderTarget &)'
1>  Generating Code...
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

Answer 1

这个特定的错误，（虽然我很确定你一旦修好它会有更多），可能来自于：

void testObject::Render(sf::RenderWindow window, std::vector<sf::Sprite> sprites)

您正在传递RenderWindow值，但它不可复制。通过引用或指针传递它。

Answer 2

好的，我解决了这个问题，但现在它没有给我任何错误，所以这很好，但它没有渲染任何东西。

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C ++ SFML 2.2向量

2 个答案: