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• Simple DirectMedia Layer – cross-platform multimedia library

– GNU LGPL

– fornisce accesso (a livello abb basso) a

• audio,

• keyboard, mouse, joystick,

• windowing

• 3D hardware via OpenGL

• 2D video framebuffer.

– gira su: Linux, Windows, BeOS, MacOS X ...

– completato di librerie "figlie" per vari scopo (e.g. SDL_png per file png)

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main(){

init();do_my_beautiful_algorithm();exit();

}

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main(){

init();while (true) {get_event() ;process_event();

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#ifdef WIN32#define WIN32_LEAN_AND_MEAN#include <windows.h>#endif

#include <GL/gl.h>#include <GL/glu.h>#include <stdlib.h>#include <SDL.h>

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int main(int argc, char **argv) { SDL_Init(SDL_INIT_VIDEO);SDL_SetVideoMode(640, 480, 0, SDL_OPENGL);

int done = 0;while ( ! done ) /* Loop, drawing and checking events */

{SDL_Event event;SDL_WaitEvent(&event);switch(event.type)

{ case SDL_VIDEOEXPOSE: /* evento "ridisegnati" */

rendering(); /* riempi screen buffer*/break;

case SDL_QUIT: done = 1; break ;

case SDL_KEYDOWN: if ( event.key.keysym.sym == SDLK_ESCAPE )done = 1;break;

} }SDL_Quit();return 1;

}

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void rendering(){

glClear(GL_COLOR_BUFFER_BIT);

/* disegna tutto */

glFinish(); /* aspetta che sia tutto finito */SDL_GL_SwapBuffers(); /* vediamo questa fra un sec */

}

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/* ci automandiamo un messaggio che (s.o. permettendo)ci fara' ridisegnare la finestra*/

void updateScene(){

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}

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glVertex3d(x,y,z);

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ç >2EÌp�>2D >glBegin (GL_TRIANGLES);

³ ´m¦NM¨ ³ Ńm ¦*ìmªNmŃ¬N�¡&³'¨ * *¯N Ñ<´m¬J· º

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simple directmedia layer - cnrvcg.isti.cnr.it/~tarini/teaching/cg07/lez05.implementaz.pdf• simple...

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