AllegroGL not making window http://www.allegro.cc/forums/view/586031 Allegro.cc Forum Thread matthew@allegro.cc (Matthew Leverton) Thu, 22 Jun 2006 18:42:30 +0000
1#include <allegro.h>
2#include <alleggl.h>
3 
4 
5void Init()
6{
7 allegro_init();
8 install_allegro_gl();
9 install_keyboard();
10 
11 set_gfx_mode(GFX_OPENGL_WINDOWED, 640, 480, 0, 0);
12 
13 glClearColor(0.0, 0.0, 0.0, 0.0);
14}
15 
16int main()
17{
18 Init();
19 glClear(GL_COLOR_BUFFER_BIT);
20 readkey();
21 
22 return 0;
23}
24END_OF_MAIN();

The code is supposed to make a blank window but the window doesn't show up. :(

P.S. I installed the latest dev-paks for Allegro and AllegroGL.

]]> no-reply@allegro.cc (biscuitz) Thu, 22 Jun 2006 05:36:37 +0000

Heh I bet I know what tutorial you're getting that from. You need to call the allegro_gl_flip() function (no parameters) to flip the buffer onto the screen.

]]> no-reply@allegro.cc (BrknPhoenix) Thu, 22 Jun 2006 05:50:16 +0000

I added flip after the "glClear" in main() :( now it comes up with an error

Quote:

AppName: allegro gl.exe AppVer: 0.0.0.0 ModName: allegro gl.exe
ModVer: 0.0.0.0 Offset: 00002fc5

edit: I tried compiling another example:

1#include <allegro.h>
2#include <alleggl.h>
3 
4volatile int Time = 0;
5void TimerFunc()
6{
7 Time++;
8}
9END_OF_FUNCTION(TimerFunc);
10 
11void Init()
12{
13 allegro_init();
14 install_allegro_gl();
15 install_keyboard();
16 install_timer();
17 
18 set_gfx_mode(GFX_OPENGL_WINDOWED, 640, 480, 0, 0);
19 
20 glClearColor(0.0, 0.0, 0.0, 0.0);
21}
22 
23int main()
24{
25 Init();
26 
27 float x = 0.0, y = 0.5;
28 
29 LOCK_VARIABLE(Time);
30 LOCK_FUNCTION(TimerFunc);
31 
32 install_int_ex(TimerFunc, BPS_TO_TIMER(60));
33 
34 while(!key[KEY_ESC])
35 {
36 while(Time > 0)
37 {
38 poll_keyboard();
39 if(key[KEY_UP]) y += 0.01;
40 if(key[KEY_DOWN]) y -= 0.01;
41 if(key[KEY_RIGHT]) x += 0.01;
42 if(key[KEY_LEFT]) x -= 0.01;
43 
44 glClear(GL_COLOR_BUFFER_BIT);
45 glBegin(GL_LINES);
46 glColor3f(1.0, 0.0, 0.0);
47 glVertex2f(0.0, 0.0);
48 glVertex2f(x, y);
49 glColor3f(0.0, 1.0, 0.0);
50 glVertex2f(0.0, 0.0);
51 glVertex2f(-x, y);
52 glColor3f(0.0, 0.0, 1.0);
53 glVertex2f(0.0, 0.0);
54 glVertex2f(x, -y);
55 glColor3f(0.0, 1.0, 1.0);
56 glVertex2f(0.0, 0.0);
57 glVertex2f(-x, -y);
58 glEnd();
59 glFlush();
60 
61 Time--;
62 }
63 }
64 
65 return 0;
66}
67END_OF_MAIN();

And the window still won't show up. I think it has something to do with the dev-paks I installed >.< Ima try to compile the libraries from scratch.

]]> no-reply@allegro.cc (biscuitz) Thu, 22 Jun 2006 05:59:48 +0000

Oh well, I wasn't sure if just the flip would work. This should:

1#include <allegro.h>
2#include <alleggl.h>
3 
4 
5void Init()
6{
7 allegro_init();
8 install_allegro_gl();
9 install_keyboard();
10 
11 allegro_gl_clear_settings();
12 allegro_gl_set(AGL_COLOR_DEPTH, 16);
13 allegro_gl_set(AGL_Z_DEPTH, 8);
14 allegro_gl_set(AGL_WINDOWED, TRUE);
15 allegro_gl_set(AGL_DOUBLEBUFFER, 1);
16 allegro_gl_set(AGL_RENDERMETHOD, 1);
17 allegro_gl_set(AGL_SUGGEST, AGL_COLOR_DEPTH |
18 AGL_DOUBLEBUFFER | AGL_RENDERMETHOD |
19 AGL_Z_DEPTH | AGL_WINDOWED);
20 
21 set_gfx_mode(GFX_OPENGL, 640, 480, 0, 0);
22 
23 glClearColor(0.0, 0.0, 0.0, 0.0);
24}
25 
26int main()
27{
28 Init();
29 glClear(GL_COLOR_BUFFER_BIT);
30 allegro_gl_flip();
31 while (!key[KEY_ESC]);
32 
33 return 0;
34}
35END_OF_MAIN();

]]> no-reply@allegro.cc (BrknPhoenix) Thu, 22 Jun 2006 06:06:00 +0000

bows ty :) It works now.

]]> no-reply@allegro.cc (biscuitz) Thu, 22 Jun 2006 18:42:30 +0000