c++ - 未设置SDL_Texture

我在SDL_Texture上遇到麻烦

RPGTutorial.cpp

#include "stdafx.h"

int main(int argc, char *argv[])
{

    bool quit = false;

    SDL_Init(SDL_INIT_VIDEO);
    SDL_Window* window = NULL;
    window = SDL_CreateWindow("RPG Tutorial!", 100, 100, 600, 400, SDL_WINDOW_SHOWN);

    if (window == NULL)
    {
        std::cout << "Window couldn't be created" << std::endl;
        return 0;
    }

    SDL_Renderer* renderer = NULL;
    renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
    if (renderer == NULL)
    {
        std::cout << "Renderer is not being created!" << std::endl;

        SDL_DestroyWindow(window);
        system("PAUSE");
        return 0;

    }

    SDL_Event* mainEvent = new SDL_Event();

    SDL_Texture* grass = NULL;
    grass = IMG_LoadTexture(renderer, "Grass.bmp");
    if (grass == NULL)
    {
        std::cout << "Grass Image was not found!" << std::endl;

        SDL_DestroyWindow(window);
        SDL_DestroyRenderer(renderer);
        delete mainEvent;
        system("PAUSE");
        return 0;
    }

    SDL_Rect grass_rect;
    grass_rect.x = 0;
    grass_rect.y = 0;
    grass_rect.w = 64 * 2;
    grass_rect.h = 64 * 2;

    while (!quit && mainEvent->type != SDL_QUIT)
    {
        SDL_PollEvent(mainEvent);
        SDL_RenderClear(renderer);

        SDL_RenderCopy(renderer, grass, NULL, &grass_rect);

        SDL_RenderPresent(renderer);
    }

    SDL_DestroyWindow(window);
    SDL_DestroyRenderer(renderer);
    delete mainEvent;

    return 0;
}

stdafx.h

#include <SDL.h>
#include <SDL_image.h>
#include <SDL_mixer.h>
#include <iostream>

我在RPGTutorial-> RPGTutorial-> Grass.bmp中有Grass.bmp
当我编译它时，它是成功的。它一直运行到直到我检查if（grass == NULL）的那部分代码为止，然后通过并退出。有人可以帮我知道为什么当我将图像放在.cpp文件所在的文件夹中时，为什么没有将我的草设置为该图像吗？我什至尝试添加一个Image文件夹来容纳它，但是它也不起作用。

最佳答案

如果您有时间，我建议您花一些时间进行Lazyfoo tutorials的学习，他们很棒。他在第二个教程“在屏幕上获取图像”中提到了此问题。

Visual Studio将当前工作目录更改为.vcxproj文件所在的位置。那将是您要在其中放置资源的目录。如果不确定该位置，则可以在direct.h标头MSDN Source For getcwd中使用_getcwd()函数。