Hi All,

I was looking through the Nexuis code and saw that the engine has a
lot of options for stereo viewing (red/blue, side-by-side) but no
active (quadbuffer) stereo for LCD shutter glasses and the like.
These patches add that capability. It work very well on my
QuadroFX card giving crystal clear eye poping 3D.

The modifications are pretty small thanks to all the previous stereo work.
It's controlled by two new command line options;

nexuis-glx -stereogl +r_stereo_active 1
or
nexuis-sdl -stereogl -r_stereo_active 1


Nice game engine. Have Fun.
Chuck Sites

vid_glx.c

Code: Select all

--- darkplaces/vid_glx.c        2006-08-31 10:16:54.000000000 -0400
+++ darkplaces_stereo/vid_glx.c 2006-09-24 12:53:17.717450740 -0400
@@ -87,6 +87,7 @@
static qboolean vid_usingmouse = false;
static qboolean vid_usingvsync = false;
static qboolean vid_usevsync = false;
+static qboolean vid_stereogl = false;
static qboolean vid_x11_hardwaregammasupported = false;
static int vid_x11_gammarampsize = 0;
static float   mouse_x, mouse_y;
@@ -610,6 +611,8 @@
// COMMANDLINEOPTION: Input: -nomouse disables mouse support (see also vid_mouse cvar)
        if (COM_CheckParm ("-nomouse") || COM_CheckParm("-safe"))
                mouse_avail = false;
+       if (COM_CheckParm ("-stereogl"))
+               vid_stereogl = true;
}

void VID_BuildGLXAttrib(int *attrib, int stencil)
@@ -620,6 +623,11 @@
        *attrib++ = GLX_BLUE_SIZE;*attrib++ = 1;
        *attrib++ = GLX_DOUBLEBUFFER;
        *attrib++ = GLX_DEPTH_SIZE;*attrib++ = 1;
+       if (vid_stereogl) {
+               // Humm why the *attrib++ = 1; above?
+               *attrib++ = GLX_STEREO;
+       }
+
        // if stencil is enabled, ask for alpha too
        if (stencil)
        {


vid_sdl.c

Code: Select all

--- darkplaces/vid_sdl.c        2006-08-31 10:16:54.000000000 -0400
+++ darkplaces_stereo/vid_sdl.c 2006-09-24 12:49:23.807755679 -0400
@@ -52,6 +52,7 @@

static qboolean vid_usingmouse;
static qboolean vid_isfullscreen;
+static qboolean vid_stereogl=false;
static int vid_numjoysticks = 0;
#define MAX_JOYSTICKS 8
static SDL_Joystick *vid_joysticks[MAX_JOYSTICKS];
@@ -530,6 +531,9 @@
                SDL_GL_SetAttribute (SDL_GL_BLUE_SIZE, 1);
                SDL_GL_SetAttribute (SDL_GL_DEPTH_SIZE, 16);
        }
+       if (COM_CheckParm("-stereogl"))
+               SDL_GL_SetAttribute (SDL_GL_STEREO, 1);
+

        screen = SDL_SetVideoMode(width, height, bpp, flags);
        if (screen == NULL)


glquake.h

Code: Select all

--- darkplaces/glquake.h        2006-08-10 16:33:44.000000000 -0400
+++ darkplaces_stereo/glquake.h 2006-09-24 12:59:24.064576006 -0400
@@ -170,8 +170,14 @@
#define GL_TEXTURE_COORD_ARRAY                 0x8078
//#define GL_EDGE_FLAG_ARRAY                   0x8079

+#define GL_FRONT_LEFT                           0x0400
+#define GL_FRONT_RIGHT                          0x0401
+#define GL_BACK_LEFT                            0x0402
+#define GL_BACK_RIGHT                           0x0403
#define GL_FRONT                               0x0404
#define GL_BACK                                        0x0405
+#define GL_LEFT                                 0x0406
+#define GL_RIGHT                                0x0407

#define GL_VENDOR                              0x1F00
#define GL_RENDERER                            0x1F01


cl_screen.c

Code: Select all

--- darkplaces/cl_screen.c      2006-09-05 21:23:50.000000000 -0400
+++ darkplaces_stereo/cl_screen.c       2006-09-24 14:23:27.386635358 -0400
@@ -37,6 +37,7 @@
cvar_t r_stereo_redblue = {0, "r_stereo_redblue", "0", "red/blue anaglyph stereo glasses (note: most of these glasses are actually red/cyan, try that one too)"};
cvar_t r_stereo_redcyan = {0, "r_stereo_redcyan", "0", "red/cyan anaglyph stereo glasses, the kind given away at drive-in movies like Creature From The Black Lagoon In 3D"};
cvar_t r_stereo_redgreen = {0, "r_stereo_redgreen", "0", "red/green anaglyph stereo glasses (for those who don't mind yellow)"};
+cvar_t r_stereo_active = {0, "r_stereo_active", "0", "Active stereo (for lcd-shutter glasses and quadro cards)"};
cvar_t scr_zoomwindow = {CVAR_SAVE, "scr_zoomwindow", "0", "displays a zoomed in overlay window"};
cvar_t scr_zoomwindow_viewsizex = {CVAR_SAVE, "scr_zoomwindow_viewsizex", "20", "horizontal viewsize of zoom window"};
cvar_t scr_zoomwindow_viewsizey = {CVAR_SAVE, "scr_zoomwindow_viewsizey", "20", "vertical viewsize of zoom window"};
@@ -607,6 +608,7 @@
        Cvar_RegisterVariable(&r_stereo_redblue);
        Cvar_RegisterVariable(&r_stereo_redcyan);
        Cvar_RegisterVariable(&r_stereo_redgreen);
+       Cvar_RegisterVariable(&r_stereo_active);
        Cvar_RegisterVariable(&scr_zoomwindow);
        Cvar_RegisterVariable(&scr_zoomwindow_viewsizex);
        Cvar_RegisterVariable(&scr_zoomwindow_viewsizey);
@@ -1493,7 +1495,7 @@
        if (r_timereport_active)
                R_TimeReport("clear");

-       if (r_stereo_redblue.integer || r_stereo_redgreen.integer || r_stereo_redcyan.integer || r_stereo_sidebyside.integer)
+       if (r_stereo_active.integer || r_stereo_redblue.integer || r_stereo_redgreen.integer || r_stereo_redcyan.integer || r_stereo_sidebyside.integer)
        {
                matrix4x4_t originalmatrix = r_view.matrix;
                r_view.matrix.m[0][3] = originalmatrix.m[0][3] + r_stereo_separation.value * -0.5f * r_view.matrix.m[0][1];
@@ -1510,6 +1512,9 @@
                        r_view.colormask[2] = 0;
                }

+               if (r_stereo_active.integer)
+                        qglDrawBuffer(GL_BACK_LEFT);
+
                SCR_DrawScreen();

                r_view.matrix.m[0][3] = originalmatrix.m[0][3] + r_stereo_separation.value * 0.5f * r_view.matrix.m[0][1];
@@ -1526,6 +1531,9 @@
                        r_view.colormask[2] = r_stereo_redcyan.integer || r_stereo_redblue.integer;
                }

+               if (r_stereo_active.integer)
+                        qglDrawBuffer(GL_BACK_RIGHT);
+
                SCR_DrawScreen();

                r_view.matrix = originalmatrix;


This have to be the coolest first post ever

It's a bit late for 3d maths for me ATM, but this code is using the toe-in method rather than off-axis projection, right? If so, good thing i'm going cross-eyed from fatigue...

Nice first post, BTW. =-)

Hi. Thanks for encouragement. I just wanted to pass on two more patches
for the Apple and Windows users that want active stereo. I don't have ether
of those systems, so these are completely untested. According to what
I've read these should work. Perhaps someone could test these. Also
I've read in some old posts that AGL does not support
glDrawBuffer(GL_BACK_LEFT); or glDrawBuffer(GL_BACK_RIGHT);
commands. So I wouldn't be supprized if active stereo on Apples is broke.

Also, I may have the Left and Right buffers reversed in cl_screen.c as I seem to
be seeing really good depth with the r_stereo_separation -4. Just swap
the LEFT and RIGHT in the cl_screen.c patch.

The only other problem I see is the floating gun. It's so close to the user that
it's hard to make the left and right images converge and it becomes very
distracting. Perhaps someone else may have a fix for that like a special
transformation for gun when viewed in stereo.

Have Fun,
Chuck

Code: Select all

--- darkplaces/vid_wgl.c        2006-08-31 10:16:54.000000000 -0400
+++ darkplaces_stereo/vid_wgl.c 2006-09-24 17:17:03.038885785 -0400
@@ -776,6 +776,10 @@
                pfd.cAlphaBits = 0;
        }

+       if (COM_CheckParm("-stereogl))
+                pfd.dwFlags =  PFD_DRAW_TO_WINDOW |  PFD_SUPPORT_OPENGL  |  PFD_DOUBLEBUFFER | PFD_STEREO;
+
+
        gldrivername = "opengl32.dll";
// COMMANDLINEOPTION: Windows WGL: -gl_driver <drivername> selects a GL driver library, default is opengl32.dll, useful only for 3dfxogl.dll or 3dfxvgl.dll, if you don't know what this is for, you don't need it
        i = COM_CheckParm("-gl_driver");


vid_agl.c

Code: Select all

--- darkplaces/vid_agl.c        2006-08-31 10:16:54.000000000 -0400
+++ darkplaces_stereo/vid_agl.c 2006-09-24 17:20:58.883645595 -0400
@@ -52,6 +52,7 @@

static qboolean vid_isfullscreen = false;
static qboolean vid_usingvsync = false;
+static qboolean vid_stereogl = false;

static qboolean sound_active = true;

@@ -231,6 +232,8 @@
// COMMANDLINEOPTION: Input: -nomouse disables mouse support (see also vid_mouse cvar)
        if (COM_CheckParm ("-nomouse") || COM_CheckParm("-safe"))
                mouse_avail = false;
+       if (COM_CheckParm ("-stereogl"))
+               vid_stereogl = true;
}

static void *prjobj = NULL;
@@ -369,6 +372,11 @@
        *attrib++ = AGL_DOUBLEBUFFER;
        *attrib++ = AGL_DEPTH_SIZE;*attrib++ = 1;

+       if (vid_stereogl) {
+               // Humm why the *attrib++ = 1; above?
+               *attrib++ = AGL_STEREO;
+       }
+
        // if stencil is enabled, ask for alpha too
        if (stencil)
        {


Opps. the patch for vid_wgl.c has a typo. Here is that patch corrected.

Have Fun,
Chuck

vid_wgl.c

Code: Select all

--- darkplaces/vid_wgl.c        2006-08-31 10:16:54.000000000 -0400
+++ darkplaces_stereo/vid_wgl.c 2006-09-24 18:24:12.853721979 -0400
@@ -776,6 +776,10 @@
                pfd.cAlphaBits = 0;
        }

+       if (COM_CheckParm("-stereogl"))
+                pfd.dwFlags =  PFD_DRAW_TO_WINDOW |  PFD_SUPPORT_OPENGL  |  PFD_DOUBLEBUFFER | PFD_STEREO;
+
+
        gldrivername = "opengl32.dll";
// COMMANDLINEOPTION: Windows WGL: -gl_driver <drivername> selects a GL driver library, default is opengl32.dll, usefu
l only for 3dfxogl.dll or 3dfxvgl.dll, if you don't know what this is for, you don't need it
        i = COM_CheckParm("-gl_driver");


I think your problem with the gun rendering is a symptom of the code using toe-in as the projection method, as this means the near/far planes of the left/right views aren't projected onto the same planes. To do so, you need to set up asymmetric view frustums in addition to simply moving the eye point. Have a look at http://local.wasp.uwa.edu.au/~pbourke/stereographics/stereorender/ for a better explanation than mine. =-)

The *attrib++ = 1; is because nnn_DEPTH_SIZE uses the following attribute as a value specifying how many depth bits of precision to require as a minimum. 1 by convention usually means "I need this buffer but don't care what precision it has".

I'll see if I can't sneek in some time at work to try this patch out.

syschuck wrote:Hi All,

I was looking through the Nexuis code and saw that the engine has a
lot of options for stereo viewing (red/blue, side-by-side) but no
active (quadbuffer) stereo for LCD shutter glasses and the like.
These patches add that capability. It work very well on my
QuadroFX card giving crystal clear eye poping 3D.

The modifications are pretty small thanks to all the previous stereo work.
It's controlled by two new command line options;

nexuis-glx -stereogl +r_stereo_active 1
or
nexuis-sdl -stereogl -r_stereo_active 1


Nice game engine. Have Fun.
Chuck Sites

This patch is interesting, though I think it may need some more refinement before inclusion.

Could you please change it from using a -stereogl commandline option to a vid_stereo cvar (this can still be set on the commandline using +vid_stereo 1) which is saved to the config and available in the video options menu. This way it can easily default off but be available to people who think their hardware supports it

Additionally that cvar could directly control the stereo rendering, since usually if someone turns that on they want stereo rendering, the other r_stereo_* cvars would only be relevant when not using a stereo buffered visual. Although the r_stereo_separation cvar is clearly relevant here, and should be put in the video options menu accordingly.

Regarding the weapon, I'm sorry about that, I keep shrinking the gun more and more due to complaints from people about it poking into walls, it is about 1/9th its actual size in Nexuiz, and consequently VERY distracting, it also doesn't light properly as a result. In DarkPlaces running Quake it is 1/3rd its actual size and I'd like to fix that as well, I just need to find another solution somehow...

Hi All,

LordHavoc, I've modified the patches so that there is now a
vid_stereogl cvar and I also left in the -stereogl command line
option as a convenience; when you see the code, I think you will
agree. I've also left in the r_stereo_active cvar for a couple
of reasons; but mainly so that a user at the console could turn
off stereo rendering and then re-enable it later; say for example
debugging purposes without re-initializing the video hardware,
or perhaps a user just gets tied eyes from stereo but doesn't
want to give up the game. The other reason is so the code doesn't
have to use an extern to peek into the cvars of the 'vid_' section
from the 'cl_' section of the code. I'm just trying to follow the
code style there and keep the changes small. Currently that leaves
the openGL's double buffering in a mess but I think a small change
to the console code will fix that.

Regarding the gun positioning, I can't find where the gun
coordinates are located. Are they in the model itself?
I don't think it's toe-in like kyre suggested (good URL kyre)
Everything else seems to have very good depth qualities even
close up.

About the code; modified are cl_screen.c vid_shared.c and vid_glx.c
vid_sdl.c vid_wgl.c and vid_agl.c. cl_screen.c contains all of the
quad-buffer stereo code. All of the vid_ codes are just initializing
openGL to support quad-buffering. All patches are generated with
diff -u original new

Anyway, I've been fragging away in eye popping 3D stereo for a weeks
now, and it's a blast! Usually me getting blasted! I'm such a novice.

Best Regards,
Chuck

Code: Select all

--- darkplaces/cl_screen.c      2006-09-05 21:23:50.000000000 -0400
+++ darkplaces_stereo/cl_screen.c       2006-10-15 22:45:08.545923182 -0400
@@ -37,6 +37,7 @@
cvar_t r_stereo_redblue = {0, "r_stereo_redblue", "0", "red/blue anaglyph stereo glasses (note: most of these glasses are actually red/cyan, try that one too)"};
cvar_t r_stereo_redcyan = {0, "r_stereo_redcyan", "0", "red/cyan anaglyph stereo glasses, the kind given away at drive-in movies like Creature From The Black Lagoon In 3D"};
cvar_t r_stereo_redgreen = {0, "r_stereo_redgreen", "0", "red/green anaglyph stereo glasses (for those who don't mind yellow)"};
+cvar_t r_stereo_active = {0, "r_stereo_active", "0", "Active stereo (for lcd-shutter glasses and quadro cards)"};
cvar_t scr_zoomwindow = {CVAR_SAVE, "scr_zoomwindow", "0", "displays a zoomed in overlay window"};
cvar_t scr_zoomwindow_viewsizex = {CVAR_SAVE, "scr_zoomwindow_viewsizex", "20", "horizontal viewsize of zoom window"};
cvar_t scr_zoomwindow_viewsizey = {CVAR_SAVE, "scr_zoomwindow_viewsizey", "20", "vertical viewsize of zoom window"};
@@ -46,7 +47,6 @@
int jpeg_supported = false;

qboolean       scr_initialized;                // ready to draw
-
float          scr_con_current;

extern int     con_vislines;
@@ -607,6 +607,7 @@
        Cvar_RegisterVariable(&r_stereo_redblue);
        Cvar_RegisterVariable(&r_stereo_redcyan);
        Cvar_RegisterVariable(&r_stereo_redgreen);
+       Cvar_RegisterVariable(&r_stereo_active);
        Cvar_RegisterVariable(&scr_zoomwindow);
        Cvar_RegisterVariable(&scr_zoomwindow_viewsizex);
        Cvar_RegisterVariable(&scr_zoomwindow_viewsizey);
@@ -1493,7 +1494,7 @@
        if (r_timereport_active)
                R_TimeReport("clear");

-       if (r_stereo_redblue.integer || r_stereo_redgreen.integer || r_stereo_redcyan.integer || r_stereo_sidebyside.integer)
+       if (r_stereo_active.integer || r_stereo_redblue.integer || r_stereo_redgreen.integer || r_stereo_redcyan.integer || r_stereo_sidebyside.integer)
        {
                matrix4x4_t originalmatrix = r_view.matrix;
                r_view.matrix.m[0][3] = originalmatrix.m[0][3] + r_stereo_separation.value * -0.5f * r_view.matrix.m[0][1];
@@ -1510,6 +1511,9 @@
                        r_view.colormask[2] = 0;
                }

+               if (r_stereo_active.integer)
+                        qglDrawBuffer(GL_BACK_RIGHT);
+
                SCR_DrawScreen();

                r_view.matrix.m[0][3] = originalmatrix.m[0][3] + r_stereo_separation.value * 0.5f * r_view.matrix.m[0][1];
@@ -1526,6 +1530,9 @@
                        r_view.colormask[2] = r_stereo_redcyan.integer || r_stereo_redblue.integer;
                }

+               if (r_stereo_active.integer)
+                        qglDrawBuffer(GL_BACK_LEFT);
+
                SCR_DrawScreen();

                r_view.matrix = originalmatrix;


vid_shared.c

Code: Select all

--- darkplaces/vid_shared.c     2006-09-04 19:58:08.000000000 -0400
+++ darkplaces_stereo/vid_shared.c      2006-10-15 23:48:17.448328112 -0400
@@ -76,6 +76,7 @@
cvar_t vid_mouse = {CVAR_SAVE, "vid_mouse", "1", "whether to use the mouse in windowed mode (fullscreen always does)"};
cvar_t vid_minwidth = {0, "vid_minwidth", "0", "minimum vid_width that is acceptable (to be set in default.cfg in mods)"};
cvar_t vid_minheight = {0, "vid_minheight", "0", "minimum vid_height that is acceptable (to be set in default.cfg in mods)"};
+cvar_t vid_stereogl = {CVAR_SAVE, "vid_stereogl", "0", "enable active stereo rendering (1) or not (0) enable r_stereo_active also if you want this option"};
cvar_t gl_combine = {0, "gl_combine", "1", "faster rendering by using GL_ARB_texture_env_combine extension (part of OpenGL 1.3 and above)"};
cvar_t gl_finish = {0, "gl_finish", "0", "make the cpu wait for the graphics processor at the end of each rendered frame (can help with strange input or video lag problems on some machines)"};

@@ -889,6 +890,7 @@
        Cvar_RegisterVariable(&vid_mouse);
        Cvar_RegisterVariable(&vid_minwidth);
        Cvar_RegisterVariable(&vid_minheight);
+       Cvar_RegisterVariable(&vid_stereogl);
        Cvar_RegisterVariable(&gl_combine);
        Cvar_RegisterVariable(&gl_finish);
        Cmd_AddCommand("force_centerview", Force_CenterView_f, "recenters view (stops looking up/down)");
@@ -985,6 +987,10 @@
// COMMANDLINEOPTION: Video: -bpp <bits> performs +vid_bitsperpixel <bits> (example -bpp 32 or -bpp 16)
                if ((i = COM_CheckParm("-bpp")) != 0)
                        Cvar_SetQuick(&vid_bitsperpixel, com_argv[i+1]);
+// COMMANDLINEOPTION: Video: -stereogl performs +vid_stereogl 1
+               if (COM_CheckParm("-stereogl"))
+                       Cvar_SetValueQuick(&vid_stereogl, true);
+               // add r_stereo_active too?
        }

        Con_Print("Starting video system\n");


vid_agl.c

Code: Select all

--- darkplaces/vid_agl.c        2006-08-31 10:16:54.000000000 -0400
+++ darkplaces_stereo/vid_agl.c 2006-10-16 02:31:30.074169150 -0400
@@ -369,6 +369,9 @@
        *attrib++ = AGL_DOUBLEBUFFER;
        *attrib++ = AGL_DEPTH_SIZE;*attrib++ = 1;

+        if (Cvar_VariableValue("vid_stereogl"))
+               *attrib++ = AGL_STEREO;
+
        // if stencil is enabled, ask for alpha too
        if (stencil)
        {


vid_glx.c

Code: Select all

--- darkplaces/vid_glx.c        2006-08-31 10:16:54.000000000 -0400
+++ darkplaces_stereo/vid_glx.c 2006-10-16 00:20:40.444854365 -0400
@@ -620,6 +620,10 @@
        *attrib++ = GLX_BLUE_SIZE;*attrib++ = 1;
        *attrib++ = GLX_DOUBLEBUFFER;
        *attrib++ = GLX_DEPTH_SIZE;*attrib++ = 1;
+
+       if (Cvar_VariableValue("vid_stereogl"))
+               *attrib++ = GLX_STEREO;
+
        // if stencil is enabled, ask for alpha too
        if (stencil)
        {


vid_sdl.c

Code: Select all

--- darkplaces/vid_sdl.c        2006-08-31 10:16:54.000000000 -0400
+++ darkplaces_stereo/vid_sdl.c 2006-10-15 23:58:13.202104672 -0400
@@ -530,6 +530,8 @@
                SDL_GL_SetAttribute (SDL_GL_BLUE_SIZE, 1);
                SDL_GL_SetAttribute (SDL_GL_DEPTH_SIZE, 16);
        }
+       if (Cvar_VariableValue("vid_stereogl"))
+               SDL_GL_SetAttribute (SDL_GL_STEREO, 1);

        screen = SDL_SetVideoMode(width, height, bpp, flags);
        if (screen == NULL)


vid_wgl.c

Code: Select all

--- darkplaces/vid_wgl.c        2006-08-31 10:16:54.000000000 -0400
+++ darkplaces_stereo/vid_wgl.c 2006-10-15 23:45:01.507098935 -0400
@@ -776,6 +776,9 @@
                pfd.cAlphaBits = 0;
        }

+       if (Cvar_VariableValue("vid_stereogl"))
+                pfd.dwFlags =  PFD_DRAW_TO_WINDOW |  PFD_SUPPORT_OPENGL  |  PFD_DOUBLEBUFFER | PFD_STEREO;
+
        gldrivername = "opengl32.dll";
// COMMANDLINEOPTION: Windows WGL: -gl_driver <drivername> selects a GL driver library, default is opengl32.dll, useful only for 3dfxogl.dll or 3dfxvgl.dll, if you don't know what this is for, you don't need it
        i = COM_CheckParm("-gl_driver");


syschuck wrote:Hi All,

LordHavoc, I've modified the patches so that there is now a
vid_stereogl cvar and I also left in the -stereogl command line
option as a convenience; when you see the code, I think you will
agree. I've also left in the r_stereo_active cvar for a couple
of reasons; but mainly so that a user at the console could turn
off stereo rendering and then re-enable it later; say for example
debugging purposes without re-initializing the video hardware,
or perhaps a user just gets tied eyes from stereo but doesn't
want to give up the game. The other reason is so the code doesn't
have to use an extern to peek into the cvars of the 'vid_' section
from the 'cl_' section of the code. I'm just trying to follow the
code style there and keep the changes small. Currently that leaves
the openGL's double buffering in a mess but I think a small change
to the console code will fix that.

I am applying your patch, however with some changes:
I'm skipping r_stereo_active as I really can't see enough justification for it - if you choose a stereo buffered video setting, it should be stereo, being able to turn it off is not that useful, and you can get that effect (with less potential buffering problems) with r_stereo_separation 0.
I'm skipping the -stereogl commandline option as I only support commandline options for legacy reasons, it is preferred to use +vid_stereogl 1 on the commandline.
I renamed vid_stereogl to vid_stereobuffer because I don't think it is correct to refer to OpenGL in a video option setting when it is not really specific to OpenGL (I'm sure Direct3D has an equivilant feature, if I ever get around to adding Direct3D support someday).
I added more qglDrawBuffer calls, especially to the loading screen code.
I changed the Vid_Mode setup to take stereo as a parameter, and properly turn it off if the mode set fails.

syschuck wrote: Regarding the gun positioning, I can't find where the gun
coordinates are located. Are they in the model itself?
I don't think it's toe-in like kyre suggested (good URL kyre)
Everything else seems to have very good depth qualities even
close up.

You're looking for the cl_bobmodel stuff in view.c.
I'll add a cl_viewmodel_scale cvar to allow changing the gun size back to 1.0 (just don't go too near a wall!).

I've noticed that in Doom3 the gun lowers if you get too near a wall, which may be a better behavior but not one I can implement easily in the engine for several compatibility reasons I won't go into here.

syschuck wrote: Anyway, I've been fragging away in eye popping 3D stereo for a weeks now, and it's a blast! Usually me getting blasted! I'm such a novice.

I can't directly apply your patch due to the whitespace (tabs and blank lines) being mangled by the forum, so I'm applying it manually.

In future it would be better to post it on a nopaste site and give the URL, as those services have a download option to get the original text.

I'd like to see stereo 3D but I don't have suitable hardware and the hardware seems to be quite expensive; I use LCDs so I would need to get a head mounted display from i-glasses instead of the usual shutter-glasses, and the Linux NVIDIA drivers only support stereo graphics on the Quadro models as far as I know, which are even more expensive than the head mounted display.

Although I could use the windows XP machine next to me for testing as it has a CRT and thus could use shutter glasses and the windows nvidia drivers support stereo even on non-Quadro models, I don't know if I'd have to buy anything extra to get the driver support though (as normally the shutter-glasses come with specific brands of nvidia card, I don't know if I could just buy them separately).

Lordhavac and All,

Thanks for accepting the patch for quadbuffer stereo. I think your changes
sound cool and your game engine rocks anyway. Yeeppeee! Yeepeee!!!
This is the first FPS game that I know that supports Quadbuffer stereo natively
with Linux, BSD, Mac OS-X, and Windows. I hope it will set a trend with other games.

Best Regards,
Chuck

That sounds really cool.. to bad i can't test it

Hardware wise, it's not too difficult to find the parts needed. Cards that should
work are all of the Nvidia Quadro series, all of the ATI firegl series and some of
the Matrox cards. The high-end of those cards really go through the roof in
price. On the low-to-mid range they are between $200-300. My personal
system is based on a quadro FX 500 (AGP with an Althon 1.4Ghz processor
running Mandriva Linux 2006). That card cost about $250 a year or so ago
and has about the same capabilities as a GeForce FX 5200. Not exactly a
great game card by today's standards but good enough.

For the glasses or displays there are a lot of options for Head mounted
displays to LCD shutter glasses, to Auto-stereo LCD panels. With LCD
shutter glasses, you need a CRT monitor with a high vertical refresh rate
(ie, high-res 1280x1024@75hz or better). If you have a LCD display, then
look at an HMD. Look at;

[url]
http://www.i-glassesstore.com/3dgaming.html
[/url]
They have some good HMDs and LCD shutter glasses that are pretty
affordable. What I have is the 'i-ware 3D Games Glasses Pack' which
comes with a wired pair of LCD shutter glasses and a video dongle which
takes stereo sync signals from the graphics card over the DCC signaling
channel to toggel the which eye is dark and which is clear. It costs about
$60 and for stereo on a CRT is the best $60 I've ever spent.
The other company worth looking at for consumer level HMD's is Emagin.
They make the best and most affordable HMD display system I know of.
at $549 it's nearly half the price of the HMD's from Iglassesstore. Not only
does it do stereo, but it also has an excellent USB based head tracker as
well. It works OK with linux but not the head tracking stuff (Ditto for Mac's
too) On Windows though, wow! Actually one of the projects I've been trying
to do in my spare time is to put together a driver for linux for the head tracking.
The Nexuiz engine will probably be what I experiment with.

Check out;

[url]
http://www.emagin.com/
[/url]

Best Regards
Chuck

syschuck wrote:Hardware wise, it's not too difficult to find the parts needed. Cards that should
work are all of the Nvidia Quadro series, all of the ATI firegl series and some of
the Matrox cards. The high-end of those cards really go through the roof in
price. On the low-to-mid range they are between $200-300. My personal
system is based on a quadro FX 500 (AGP with an Althon 1.4Ghz processor
running Mandriva Linux 2006). That card cost about $250 a year or so ago
and has about the same capabilities as a GeForce FX 5200. Not exactly a
great game card by today's standards but good enough.

Quadros are simply exorbitantly expensive (that GFFX5200 for instance is absolutely horrible as a gaming card, it can barely run normal games at playable speeds, let alone doom3-class-graphics like Nexuiz uses), I don't see why they should be required for quadbuffer stereo.

I remember when ELSA brand NVIDIA video cards came with shutter glasses and did quadbuffer stereo on a consumer card for normal prices.

Of course shutter glasses have become more and more useless due to the rise in LCDs and the decline in CRTs (my dad owns one of the last ever 22" 2048x1536x85hz CRTs, Mitsubishi DP2070sb - sure, other 2048x1536 CRTs exist but not at a nice flicker free 85hz).

And ever since I switched to LCDs I can't imagine going back to CRTs, because LCD are just so much sharper, which mostly compensates for the drawbacks (scaling and LCD ghosting such as ripples trailing moving objects and strange transitions between green/purple).

syschuck wrote:For the glasses or displays there are a lot of options for Head mounted
displays to LCD shutter glasses, to Auto-stereo LCD panels. With LCD
shutter glasses, you need a CRT monitor with a high vertical refresh rate
(ie, high-res 1280x1024@75hz or better). If you have a LCD display, then
look at an HMD. Look at;

HMDs aren't exactly what I'd call 'cheap' either... though this is not unexpected as they have to use highres LCDs that would normally only be used in projectors.

My biggest complaint about HMDs is that I have trouble imagining being immersed in 800x600 graphics

syschuck wrote:[url]
http://www.i-glassesstore.com/3dgaming.html
[/url]
They have some good HMDs and LCD shutter glasses that are pretty
affordable. What I have is the 'i-ware 3D Games Glasses Pack' which
comes with a wired pair of LCD shutter glasses and a video dongle which
takes stereo sync signals from the graphics card over the DCC signaling
channel to toggel the which eye is dark and which is clear. It costs about
$60 and for stereo on a CRT is the best $60 I've ever spent.
The other company worth looking at for consumer level HMD's is Emagin.
They make the best and most affordable HMD display system I know of.
at $549 it's nearly half the price of the HMD's from Iglassesstore. Not only
does it do stereo, but it also has an excellent USB based head tracker as
well. It works OK with linux but not the head tracking stuff (Ditto for Mac's
too) On Windows though, wow! Actually one of the projects I've been trying
to do in my spare time is to put together a driver for linux for the head tracking.
The Nexuiz engine will probably be what I experiment with.

Check out;

[url]
http://www.emagin.com/
[/url]

Best Regards
Chuck

Interesting, it hadn't occurred to me that short-lived OLED displays would be reasonable as HMDs, since you don't tend to use them a lot.

Still exorbitant pricing as is common with HMDs however.

Hi All,

LordHavoc; I couldn't agree with you more about how expensive HMD's and stereo enabled video cards are. Nvidia perticularly since there is no hardware reason that their consumer level cards can't support quad-buffer stereo. I have no experience with ATI.

Anyway, I just wanted to say that active stereo looks awsome in the 2.2.2 release and plays really good too. You have two really big thumbs up from me.

The new comand line switch for enabling the active stereo buffers took a little time to find so I'm passing along that little bit of info for the group. Here is what I'm using on my home linux box.

Code: Select all

./nexuiz-linux-glx.sh +vid_refreshrate 100 +vid_width 768 +vid_height 576 +vid_fullscreen 1 +vid_stereobuffer 1


Have Fun,
Chuck Sites

syschuck wrote:The new comand line switch for enabling the active stereo buffers took a little time to find so I'm passing along that little bit of info for the group. Here is what I'm using on my home linux box.

vid_stereobuffer is a cvar as opposed to a commandline switch - it can be enabled at any time (followed by a vid_restart), I may add it to the engine menu someday (however the nexuiz menu is not handled by the engine and not my responsibility).