SDL_Texture 未设置

Question

我遇到了 SDL_Texture

的问题

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。它运行代码，直到我到达检查 if(grass == NULL) 的部分，然后它通过并退出。有人可以帮助我知道为什么当我的图像与 .cpp 文件位于同一文件夹中时我的草没有设置为图像吗？我什至尝试添加一个图像文件夹来保存它，但它也没有用。

Answer 1

如果你有时间，我建议你花一些时间来浏览一下 Lazyfoo tutorials 它们太棒了。他在第二个教程中提到了这个问题，"Getting an Image on the Screen."

Visual Studio 将当前工作目录更改为 .vcxproj 文件所在的位置。那将是您要放置资源的目录。如果您不确定它在哪里，您可以使用 direct.h header MSDN Source For getcwd 中的 _getcwd() 函数

SDL_Texture 未设置

SDL_Texture is not being set

c++

sdl

sdl-2