继承的精灵不可绘制

Question

在 SFML 中我想要一个 sprite 但有其他函数和变量所以我决定创建一个 class 继承 sprite class 像这样：
1. Player.hpp

#pragma once

#include <stdio.h>
#include <SFML/Audio.hpp>
#include <SFML/Graphics.hpp>

class Player : sf::Sprite{
    public:
        void setup();
        void input();
    private:
        int direction;
        void moveRight();
        void moveLeft();
        sf::Texture textures[8];
};

2（在制品）。 Player.cpp

void Player::setup(){
    direction = 0;
    textures[0].loadFromFile("images/player_right_still.png");
    textures[1].loadFromFile("images/player_right_jump.png");
    textures[2].loadFromFile("images/player_right_walk1.png");
    textures[3].loadFromFile("images/player_right_walk2.png");
    textures[4].loadFromFile("images/player_left_still.png");
    textures[5].loadFromFile("images/player_left_jump.png");
    textures[6].loadFromFile("images/player_left_walk1.png");
    setTexture(textures[0]);
}

void Player::input(){
    if (sf::Keyboard::isKeyPressed(sf::Keyboard::Right) || sf::Keyboard::isKeyPressed(sf::Keyboard::D)){
        moveRight();
    }
    if (sf::Keyboard::isKeyPressed(sf::Keyboard::Left) || sf::Keyboard::isKeyPressed(sf::Keyboard::A)){
        moveLeft();
    }
}

void Player::moveRight(){

}

void Player::moveLeft(){

}

game.cpp（图片因为 SO 对我来说很奇怪）

但是当我编译它时出现这个错误：

game.cpp: In function ‘int main()’:
game.cpp:23:27: error: ‘sf::Drawable’ is an inaccessible base of ‘Player’
         window.draw(player);

Answer 1

class Player : sf::Sprite 表示继承是私有的，即使用 Player class 实例的代码将无法将其转换为 Sprite 或继承的访问方法来自 Sprite class。您应该将继承更改为 public:

class Player: public sf::Sprite

继承的精灵不可绘制

Inherited sprite not draw-able

c++

inheritance

class

sfml