吃豆人碰撞代码帮助在c++和SFML

所以，最近我开始用c++和SFML制作《吃豆人》的克隆。一切都很顺利，直到我需要创造墙壁碰撞。我不太擅长碰撞，所以我预料会有问题。

我要做的是检查墙壁是否在你的上方，旁边或其他地方，然后在你撞到墙壁时阻止玩家。

问题是当你碰壁时，你停得太早了。有时你会陷入其中。不要将这与让吃豆人在墙壁上方或其他地方无法转弯的代码混淆，而是在撞到墙壁时停止。

这是我刚才提到的关于转向碰撞的代码(它也可以工作，所以不需要修复):

// All of the movement functions.
if (Keyboard::isKeyPressed(Keyboard::Up) && mapData[xtile + (ytile - 1) * 25] != 1 && mapData[xtile + (ytile - 1) * 25] != 2){
    direction = Directions{ Up };
    setVelocity(0.0, -2.5);
    source.x = 73;
}
if (Keyboard::isKeyPressed(Keyboard::Down) && mapData[xtile + (ytile + 1) * 25] != 1 && mapData[xtile + (ytile + 1) * 25] != 2){
    direction = Directions{ Down };
    setVelocity(0.0, 2.5);
    source.x = 110;
}
if (Keyboard::isKeyPressed(Keyboard::Left) && mapData[(xtile + 1) + ytile * 25] != 1 && mapData[(xtile - 1) + ytile * 25] != 2){
    direction = Directions{ Left };
    setVelocity(-2.5, 0.0);
    source.x = 0;
}
if (Keyboard::isKeyPressed(Keyboard::Right) && mapData[(xtile - 1) + ytile * 25] != 1 && mapData[(xtile + 1) + ytile * 25] != 2){
    direction = Directions{ Right };
    setVelocity(2.5, 0.0);
    source.x = 38;
}

。X是用于动画的，所以这与手头的问题无关。setVelocity为玩家设置速度，方向就是玩家的方向。方向由枚举设置。

这是我的代码，如果你想看到所有其他的文件和类(虽然他们可能是无关的问题)或其他一些信息，只要问我的代码或解释，我会张贴它!

废话少说了，我们开始吧!

main.cpp

// Headers for the program.
#include <iostream>
#include <vector>
#include <SFML/Graphics.hpp>
// Game headers.
#include "renderer.h"
#include "pacman.h"
#include "pellet.h"
#include "map.h"
using std::cout;
using namespace sf;
// All of theese functions will be used for doing things in the future.
void render();
void logic();
enum Directions{ Up = 1, Down = 2, Left = 3, Right = 4 }; // pacman's directions 
// Level data array. For the map.
int mapData[] =
{
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 1
1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, // 2
1, 3, 1, 1, 1, 3, 1, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 1, 3, 1, 1, 1, 3, 1, // 3
1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, // 4
1, 3, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 3, 1, // 5
1, 3, 3, 3, 3, 3, 1, 3, 3, 3, 3, 3, 1, 3, 3, 3, 3, 3, 1, 3, 3, 3, 3, 3, 1, // 6
1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 1, // 7
0, 0, 0, 0, 1, 3, 1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 3, 1, 0, 0, 0, 0, // 8
1, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 2, 2, 2, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 1, // 9
3, 3, 3, 3, 3, 3, 3, 3, 1, 0, 0, 0, 0, 0, 0, 0, 1, 3, 3, 3, 3, 3, 3, 3, 3, // 10
1, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 1, // 11
0, 0, 0, 0, 1, 3, 1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 3, 1, 0, 0, 0, 0, // 12
1, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 1, // 13
1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, // 14
1, 3, 1, 1, 1, 3, 1, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 1, 3, 1, 1, 1, 3, 1, // 15
1, 3, 3, 3, 1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 3, 3, 3, 1, // 16
1, 1, 1, 3, 1, 3, 1, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 3, 1, 3, 1, 1, 1, // 17
1, 3, 3, 3, 3, 3, 1, 3, 3, 3, 3, 3, 1, 3, 3, 3, 3, 3, 1, 3, 3, 3, 3, 3, 1, // 18
1, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, // 19
1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, // 20
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 // 21
};
// The maze for the game.
Map maze{ mapData };
// Make the renderer.
Renderer renderer(Vector2u(800, 800), "Pac-man");
// Make our yellow friend
Pacman pacman(358, 353);
int main(){
while (renderer.window.isOpen()){ // As long as the window is open, do this loop.
    Event event; // A event var for only one thing, closing the window.
    while (renderer.window.pollEvent(event)){ // Poll a event...
        if (event.type == Event::Closed){ // Check if the event is a close event...
            renderer.window.close(); // ... and if it is a close event then close the window.
        }
    }
    logic(); // Doing our logic before the rendering.
    render(); // Rendering.
}
}
void render(){
for (int x = 0; x < maze.map.size(); x++){
    renderer.Render(maze.map[x]);
}
renderer.Render(pacman.sprite); // Render Pacman.
renderer.window.display(); // Display...
renderer.window.clear(); // ... And then clear the image.
}
void logic(){ // Here we are going to do all of our game logic.
pacman.update(mapData, maze.map);
pacman.sprite.move(pacman.xvel, pacman.yvel); // Move Pacman
// The problem most likely occurs with theese ifs:
if (pacman.direction == Up &&     !pacman.sprite.getGlobalBounds().intersects(maze.map[pacman.xtile  + (pacman.ytile - 1) * 25].getGlobalBounds()) && mapData[
    pacman.xtile + (pacman.ytile - 1) * 25] == 1){
    pacman.yvel = 0;
}
if (pacman.direction == Down && !pacman.sprite.getGlobalBounds().intersects(maze.map[pacman.xtile + (pacman.ytile + 1) * 25].getGlobalBounds()) && mapData[
    pacman.xtile + (pacman.ytile + 1) * 25] == 1){
    pacman.yvel = 0;
}
if (pacman.direction == Left && !pacman.sprite.getGlobalBounds().intersects(maze.map[(pacman.xtile - 1) + pacman.ytile * 25].getGlobalBounds()) && mapData[
    (pacman.xtile - 1) + pacman.ytile * 25] == 1){
    pacman.xvel = 0;
}
if (pacman.direction == Right && !pacman.sprite.getGlobalBounds().intersects(maze.map[(pacman.xtile + 1) + pacman.ytile * 25].getGlobalBounds()) && mapData[
    (pacman.xtile + 1) + pacman.ytile * 25] == 1){
    pacman.xvel = 0;
}
// pellet collision (fully working)
if (mapData[pacman.xtile + pacman.ytile * 25] == 3){
    mapData[pacman.xtile + pacman.ytile * 25] = 0;
    maze.map[pacman.xtile + pacman.ytile * 25].setColor(sf::Color(0, 0, 0, 0));
    pacman.addPoint();
}
}

好了。如果你对如何解决或绕过这个问题有任何建议，请随时发布给我。记住，如果你需要更多信息，尽管问我。提前感谢!