sdl

问题 Dose anyone know how to set up SDL (simple direct media layer) on OSX Lion so I can compile my code with g++ ? I have read the "readme" that comes with the package and I have placed the frameworks folder in the relevant directory, however, this does not seem to be enough. Can anyone help me ? (I do not want to use Xcode) 回答1: If you're not using XCode, and are compiling SDL projects using gcc , you can run: gcc -o test SDLTest.c `sdl-config --cflags --libs` g++ -o test SDLText.c `sdl-config -

问题 I'm working with SDL2.0, and using a (semi modern) opengl (3.1). I'm looking to add a text overlay to my application, and to render TTF in the application. How would I go about this using modern OpenGL? EDIT: As per the suggestion of genpfault, I've tried using the SDL_TTF library, but All I'm getting is garbage on screen http://i.stack.imgur.com/FqyCT.png I've attached a gist of my shaders, which are very simple for this program, and also the snipped I'm using to load the text into surface,

问题 I'm trying to draw a rectangle outline in SDL 2.0 in order to use as a selection box. Does anyone know how to make one in SDL 2.0? 回答1: You are looking for the SDL_RenderDrawRect: int SDL_RenderDrawRect(SDL_Renderer* renderer, const SDL_Rect* rect); Typical usage would be: SDL_Rect rectToDraw = {100,100,100,100} // Just some random rect //Set Color of Rect with SDL_SetRenderDrawColor if needed SDL_RenderDrawRect(renderer, &rectToDraw); To draw a filled rect it would then be with SDL

问题 I am creating a 2D Mario game. The following function is intended to update a player's position when a particular key is pressed. The player is allowed to move left and right, and jump in the same place, or jump to the left or to the right (to form like an arc). bool updatePlayerPosition(Movement* mov){ if (this->keyPressed(SDLK_RIGHT)) { mov->applyForce(1); // Changes the velocity in X } if (this->keyPressed(SDLK_LEFT)) { mov->applyForce(-1); // Changes the velocity in X } if (this-

问题 I've recently started migrating from using SDL (1.2.15) to SDL2 (2.0.0), and had previously depended on using the extension library SDL_ttf (2.0.11) to render fonts. When I try to use the same text library I used with version one SDL with SDL2 (admittedly not yet officially released), it compiles just fine. When I run the executable, though (I'm using VS2012 for Desktop at the moment), I get the following error: Unhandled exception at 0x6C7D8C24 (SDL2.dll) in test.exe: 0xC0000005: Access

问题 I'm trying to compile a cmake project on my mac, but it depends on the SDL framework. I installed this framework and after cmake then reported to me libSDL was not found I set following export variables myself (as suggested by cmake): export SDL_INCLUDE_DIR=/Library/Frameworks/SDL.framework/ export SDLIMAGE_LIBRARY=/Library/Frameworks/SDL_image.framework/ export SDLIMAGE_INCLUDE_DIR=/Library/Frameworks/SDL_image.framework/Headers Now cmake does it job, but when I run make, I get the following

问题 Hi there I have a image with a black rectangle drawn on it, and its background is transparent. This file is saved as a png ( clear.png ). Then I have another image which is just a solid red background saved as a jpeg ( background.jpeg ). What I was trying to do is make so that the black rectangle in clear.png show up on top of the solid red background image. This is what I have done.. /*Transparent image*/ #include "SDL/SDL.h" #include "SDL/SDL_image.h" #include <iostream> using namespace std

问题 I'm getting started with SDL and C programming. I have experience with other programming languages, but linking/compiling libraries in C is new to me. I am using Mac 10.8 and have installed latest stable 2.0 using the instructions in the read me ( ./configure; make; make install ). Here is the sample code that I am trying to compile: #include <stdlib.h> #include <stdio.h> #include "SDL.h" int main(void) { if (SDL_Init(SDL_INIT_VIDEO|SDL_INIT_TIMER) != 0) { fprintf(stderr, "\nUnable to

问题 I have a C++ project that uses SDL, in particular SDL Events. I would like to use the event system for incoming network messages just as it is used for UI events. I can define a new event type and attach some arbitrary data (see this example). This is what I would do if I was using ordinary pointers: Uint32 message_event_type = SDL_RegisterEvents(1); /* In the main event loop */ while (SDL_Poll(&evt)) { if (evt.type == message_event_type) { Message *msg = evt.user.data1; handle_message(msg);