sdl

I have used SDL to save the window image via SDL_SaveBMP . The problem is that the saved image is upside down. The saved image is while it has to be How should I fix the code? screen_shot function: void screen_shot(std::string filename) { int width = glutGet(GLUT_WINDOW_WIDTH); int height = glutGet(GLUT_WINDOW_HEIGHT); SDL_Surface * image = SDL_CreateRGBSurface(SDL_SWSURFACE, width, height, 24, 0x000000FF, 0x0000FF00, 0x00FF0000, 0); glReadBuffer(GL_FRONT); glReadPixels(0, 0, width, height, GL_RGB, GL_UNSIGNED_BYTE, image->pixels); SDL_SaveBMP(image, filename.c_str()); SDL_FreeSurface(image);

I downloaded SDL2-2.0.3 . I ran ./configure && make && make install . I've also tried brew install SDL2 . This is my main.c //Using SDL and standard IO #include <SDL2/SDL.h> #include <stdio.h> //Screen dimension constants const int SCREEN_WIDTH = 640; const int SCREEN_HEIGHT = 480; int main( int argc, char* args[] ) { SDL_Window* window = NULL; SDL_Surface* screenSurface = NULL; if (SDL_Init( SDL_INIT_VIDEO ) < 0 ) { printf( "SDL could not initialize! SDL_Error: %s\n", SDL_GetError() ); } } When I run it ~:.make main gcc main.c -o main Undefined symbols for architecture x86_64: "_SDL_GetError"

I'm writing a 2D game using SDL and OpenGL in the D programming language. At the moment it simply tries to render a texture-mapped quad to the screen. Problem is, the whole texture-mapping part doesn't quite seem to work. Despite the texture apparently loading fine (gets assigned a nonzero texture number, doesn't cause glGetError to return values other than zero), the quad is rendered with the last color set in glColor, entirely ignoring the texture. I've looked for common reasons for texture mapping to fail, including this question , to no avail. The image file being loaded is 64x64, a valid

I was looking for a detailed guide to setting up Gl3w, since there are none anywhere I look! GigaBass First of all, download gl3w at https://github.com/skaslev/gl3w Then, download Python 3.x: https://www.python.org/downloads/ Next, run the script. It'll generate gl3w.c in the source folder, and gl3w.h and glcorearb.h in the include/GL/ folder. Take the three of them, and either add them directly to your project, or (easier to do the includes), move them into your project's source files folder, and add the 3 into the project. In your main source AND in your "gl3w.c" source, you want to change

小学生日记： 2019.10.13，哈尔滨，打了个铜 开头 先说结论， 这次失败，我的锅70%，sdl的锅5%，ykh25% Day0 周五， 我们队出现了奇怪的厄运上身 首先是我中途在飞机上数据线突然出现在前面座位上，下了飞机发现数据线丢了( 然后ykh的羽绒服被刮掉了一堆毛 后来sdl比赛的时候也一直激动地拉肚子上厕所 本来我是十分反对今天去吃东北菜的，但是还是架不住饿的诱惑，吃了 一盆 锅包肉 Day1 哈尔滨真的是冷的一笔，我们出发去东北林业大学 学校很大很豪华，风景很美 和女队一起报道完拍了照，就去学校食堂挂机等热身赛了 我队的特色一直是ykh从a读到z，sdl从z读到a，我有代码敲代码，无代码读最短的（毕竟六级没过） 热身赛开始，我先上机敲完了头文件，ykh此时看懂了A题并告诉了我 然后一通操作过掉A题，此时rank40+ 这个时候ykh和sdl都在看B，并且好像有哪一句话没有看懂，让我读一遍看看题意 我看了一遍居然直接看懂了并且脑子过了样例，跟队友讲了一遍就上机过了 此时rank大概铜首，问了下队友c题意，我直接说出了算法并且上机 这题细节有点多，我敲代码的时候出了不少问题，队友正在口胡d题 过了样例之后直接交就过了，此时大概rank仍然是40+ 然后讨论了一会d题发现不可做，就开始了愉快的吹b时间 此时sdl和我争论c题的出处，我就让他上机测试java以及各种c+

I'm working on a little 2D platformer/fighting game with C++ and SDL, and I'm having quite a bit of trouble with the collision detection. The levels are made up of an array of tiles, and I use a for loop to go through each one (I know it may not be the best way to do it, and I may need help with that too). For each side of the character, I move it one pixel in that direction and check for a collision (I also check to see if the character is moving in that direction). If there is a collision, I set the velocity to 0 and move the player to the edge of the tile. My problem is that if I check for