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#include <SDL.h>
#include <GL/gl.h>
#include <GL/glu.h>
void quit(int code)
{
SDL_Quit();
exit(code);
}
void handle_key_down(SDL_keysym* keysym) // une touche a été pressée
{
switch(keysym->sym)
{
case SDLK_ESCAPE: quit(0); break; // touche échap
}
}
void process_events(void)
{
SDL_Event event;
while(SDL_PollEvent(&event))
{
switch(event.type)
{
case SDL_KEYDOWN:
handle_key_down(&event.key.keysym); break;
case SDL_QUIT:
quit(0); break;
}
}
}
void draw_screen(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
//scene(); // code d'affichage de la scene
SDL_GL_SwapBuffers();
}
void setup_opengl( int width, int height )
{
float ratio = (float) width / (float) height;
glClearColor(0, 0, 0, 0);
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45, ratio, 0.5, 50);
glMatrixMode(GL_MODELVIEW);
glEnable(GL_DEPTH_TEST);
}
int main(int argc, char *argv[])
{
const SDL_VideoInfo* info = NULL;
int width = 400;
int height = 400;
int bpp = 0;
int flags = 0;
// initialisation de SDL
if(SDL_Init(SDL_INIT_VIDEO) < 0)
{
printf("Video initialization failed: %s\n", SDL_GetError());
quit(1);
}
info = SDL_GetVideoInfo();
if(!info)
{
printf("Video query failed: %s\n", SDL_GetError());
quit(1);
}
// propriétés de la fenêtre (RGB, profondeur et double buffer)
bpp = info->vfmt->BitsPerPixel;
SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5);
SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 5);
SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 5);
SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
flags = SDL_OPENGL;
// éventuellement flags |= SDL_FULLSCREEN;
if(SDL_SetVideoMode(width, height, bpp, flags) == 0 )
{
printf("Video mode set failed: %s\n", SDL_GetError());
quit(1);
}
setup_opengl(width, height);
while(1) // boucle d'affichage
{
process_events();
draw_screen();
}
return 0;
} |
