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| //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
static void initGL ()
{
initTerrain();
redim (gScreen->w, gScreen->h);
glMatrixMode( GL_PROJECTION );
glLoadIdentity( );
gluPerspective(60,(double)width/height,0.001,200000);
camera = new FreeFlyCamera(Vector3D(0,0,2));
}
//``````````````````````````````````````````````````
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
static void mainLoop ()
{
SDL_Event event;
int done = 0;
const Uint32 time_per_frame = 1000/FPS;
Uint32 last_time,current_time,elapsed_time; //for time animation
Uint32 start_time,stop_time; //for frame limit
last_time = SDL_GetTicks();
while ( !done )
{
start_time = SDL_GetTicks();
/* Check for events */
while ( SDL_PollEvent (&event) )
{
switch (event.type)
{
case SDL_QUIT: done = 1; break;
case SDL_MOUSEMOTION: if (!modeSelect) camera->OnMouseMotion(event.motion);
else camera->OnMouseMotion2(event.motion); break;
case SDL_MOUSEBUTTONUP:
case SDL_MOUSEBUTTONDOWN: if (!modeSelect) camera->OnMouseButton(event.button);
else camera->OnMouseButton2(event.button); break;
case SDL_KEYUP: camera->OnKeyboard(event.key); break;
case SDL_KEYDOWN:
switch (event.key.keysym.sym)
{
case SDLK_p: takeScreenshot("test.bmp"); break;
case SDLK_m: modeSelect = !modeSelect;
if (!modeSelect) SDL_ShowCursor(SDL_DISABLE);
else SDL_ShowCursor(SDL_ENABLE);
break;
case SDLK_ESCAPE: exit(0); break;
default : camera->OnKeyboard(event.key);
}
break;
default: break;
}
}
current_time = SDL_GetTicks();
elapsed_time = current_time - last_time;
last_time = current_time;
camera->animate(elapsed_time);
// Affichage de la scène
affichage ();
stop_time = SDL_GetTicks();
if ((stop_time - last_time) < time_per_frame)
{
SDL_Delay(time_per_frame - (stop_time - last_time));
}
}
}
//``````````````````````````````````````````````````
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void affichage (void)
{
static double th[4] = {0.0, 0.0, 0.0, 0.0};
static double t1 = 0.0, t2 = 0.0, t;
char num_str[128];
t1 = t2;
glClearColor(0,0,0,0);
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
// mise en place du Z-BUFFER
glEnable (GL_DEPTH_TEST);
glPushMatrix();
glMatrixMode (GL_PROJECTION);
glLoadIdentity();
glOrtho(0, width, 0, height, -10.0, 10.0);
glRasterPos2f(5.0, 5.0);
t2 = mtime();
t = t2 - t1;
if(t > 0.0001) t = 1.0 / t;
glColor3f( 0.0, 0.0, 1.0 );
sprintf(num_str, "%0.2f FPS ", filter(t, th));
DrawStr(num_str);
glPopMatrix();
glPushMatrix();
camera->look();
dessineTerrain();
if (modeSelect) dessinePoint();
glPopMatrix();
glFlush();
SDL_GL_SwapBuffers();
}
//``````````````````````````````````````````````````
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void redim (int x , int y)
{
if (y == 0 || x == 0) return;
//Set a new projection matrix
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(60,(double)width/height,0.001,200000);
glMatrixMode(GL_MODELVIEW);
glViewport(0,0,x,y); //Use the whole window for rendering
}
//`````````````````````````````````````````````````` |
