Question

 #pragma once
#include "Entity.h"
#include <iostream>

class Projectile : public Entity
{
public:
    Projectile() {}

    Projectile(float x, float y) {
        load("Graphics/Projectile.png");
        m_sprite.setPosition(x, y);
        m_speed = 400;
    }
};

#pragma once

#include "Entity.h"
#include <iostream>
#include "Projectile.h"

enum class Color {
    red, 
    yellow, 
    brown,
    blue
};

class Enemy : public Entity
{
public:
    Enemy(const Color& c, const sf::Vector2f& pos) {
        switch (c) {
            case Color::blue:
            {
                load("Graphics/blueEnemy.png");
            }
            break;
            case Color::red:
            {
                load("Graphics/redEnemy.png");
            }
            break;
            case Color::yellow:
            {
                load("Graphics/yellowEnemy.png");
            }
            break;
            case Color::brown:
            {
                load("Graphics/brownEnemy.png");
            }
            break;
        }
        setPos(pos);
        m_speed = 100; 
    }
};



  #pragma once
    #include "Entity.h"
    #include "Projectile.h"
    #include <vector>

class Spaceship : public Entity 
{
public:
    Spaceship();
    void move(float);
    void shoot(float);
    void update(float);
    void draw(sf::RenderWindow*) override;
private:
    bool wasSpacePressed; 
    std::vector<std::unique_ptr<Projectile>> m_projectiles; 
    sf::Clock m_clock; 
};


class EnemyFleet : public Entity
{
public:
    EnemyFleet();
    ~EnemyFleet();
    void move(float);
    bool isEnemyBottom() const; 
    bool isLeftMost() const;
    bool isRightMost() const;
    void moveX(float);
    void moveDown();
    void update(float);
    void draw(sf::RenderWindow*) override;

private:
    std::vector<std::unique_ptr<Enemy>> m_enemyFleet; 
    bool m_leftToRight; //motion of the enemyfleet
    float m_speedModifier;
};

我希望能够在它们相互碰撞时删除一个射弹和敌人，但我不知道如何做到这一点，因为unique_ptr无法复制到某些碰撞管理器类中的任何参数bc它具有独占性所有权。 unique_ptr仍然是我应该使用的东西，我不必调用删除（如果它是一个原始的ptr）？

Answer 1

是的，您无法复制AddOutputFilter，但您可以复制或获取unique_ptr指向（unique_ptr和Projectile）的对象的引用。

Enemy

您也可以使用//Example bool collision_manager::is_collision(Projectile & pr, Enemy & en) { if (pr.position() == en.position()) { return true; } return false } // similar for other objects that contain vector of unique_ptr Projectile & Spaceship::get_Projectile(size_t num) { if(num < m_projectiles.length()) { return *projectiles.at(num); } throw std::invalid_argument("some alert info"); }。

处理与使用唯一指针向量的对象的冲突

1 个答案: