ref: 4f4a0b78514eabbd3d5c1e86a178bd3628d37435
dir: /QW/docs/glqwcl-readme.txt/
GLQWCL v2.20 3dfx owners -- read the 3dfx.txt file. On a standard OpenGL system, all you should need to do to run glqwcl is put glqwcl.exe in your quake directory, and run it from there. DO NOT install the opengl32.dll unless you have a 3dfx! Glquake should change the screen resolution to 640*480*32k colors and run full screen by default. If you are running win-95, your desktop must be set to 32k or 64k colors before running glqwcl. NT can switch automatically. Theoretically, glqwcl will run on any compliant OpenGL that supports the texture objects extensions, but unless it is very powerfull hardware that accelerates everything needed, the game play will not be acceptable. If it has to go through any software emulation paths, the performance will likely by well under one frame per second. At this time (march '97), the only standard opengl hardware that can play glqwcl reasonably is an intergraph realizm, which is a VERY expensive card. 3dlabs has been improving their performance significantly, but with the available drivers it still isn't good enough to play. Some of the current 3dlabs drivers for glint and permedia baords can also crash NT when exiting from a full screen run, so I don't recommend running glqwcl on 3dlabs hardware. 3dfx has provided an opengl32.dll that implements everything glqwcl needs, but it is not a full opengl implementation. Other opengl applications are very unlikely to work with it, so consider it basically a "glqwcl driver". See the encluded 3dfx.txt for specific instalation notes. 3dfx can only run full screen, but you must still have your desktop set to a 16 bit color mode for glqwcl to start. resolution options ------------------ We had dynamic resolution changing in glqwcl for a while, but every single opengl driver I tried it on messed up in one way or another, so it is now limited to startup time only. glqwcl -window This will start glqwcl in a window on your desktop instead of switching the screen to lower resolution and covering everything. glqwcl -width 800 -height 600 Tries to run glqwcl at the specified resolution. Combined with -window, it creates a desktop window that size, otherwise it tries to set a full screen resolution. texture options --------------- The amount of textures used in the game can have a large impact on performance. There are several options that let you trade off visual quality for better performance. There is no way to flush already loaded textures, so it is best to change these options on the command line, or they will only take effect on some of the textures when you change levels. OpenGL only allows textures to repeat on power of two boundaries (32, 64, 128, etc), but software quake had a number of textures that repeated at 24 or 96 pixel boundaries. These need to be either stretched out to the next higher size, or shrunk down to the next lower. By default, they are filtered down to the smaller size, but you can cause it to use the larger size if you really want by using: glqwcl +gl_round_down 0 This will generally run well on a normal 4 MB 3dfx card, but for other cards that have either worse texture management or slower texture swapping speeds, there are some additional settings that can drastically lower the amount of textures to be managed. glqwcl +gl_picmip 1 This causes all textures to have one half the dimensions they otherwise would. This makes them blurry, but very small. You can set this to 2 to make the textures one quarter the resolution on each axis for REALLY blurry textures. glqwcl +gl_playermip 1 This is similar to picmip, but is only used for other players in deathmatch. Each player in a deathmatch requires an individual skin texture, so this can be a serious problem for texture management. It wouldn't be unreasonable to set this to 2 or even 3 if you are playing competatively (and don't care if the other guys have smudged skins). If you change this during the game, it will take effect as soon as a player changes their skin colors. run time options ---------------- At the console, you can set these values to effect drawing. gl_texturemode GL_NEAREST Sets texture mapping to point sampled, which may be faster on some GL systems (not on 3dfx). gl_texturemode GL_LINEAR_MIPMAP This is the default texture mode. gl_texturemode GL_LINEAR_MIPMAP_LINEAR This is the highest quality texture mapping (trilinear), but only very high end hardware (intergraph intense 3D / realizm) supports it. Not that big of a deal, actually. gl_finish 0 This causes the game to not issue a glFinish() call each frame, which may make some hardware run faster. If this is cleared, the 3dfx will back up a number of frames and not be very playable. gl_flashblend 0 By default, glqwcl just draws a shaded ball around objects that are emiting light. Clearing this variable will cause it to properly relight the world like normal quake, but it can be a significant speed hit on some systems. gl_ztrick 0 Glquake uses a buffering method that avoids clearing the Z buffer, but some hardware platforms don't like it. If the status bar and console are flashing every other frame, clear this variable. gl_keeptjunctions 0 If you clear this, glqwcl will remove colinear vertexes when it reloads the level. This can give a few percent speedup, but it can leave a couple stray blinking pixels on the screen. novelty features ---------------- These are some rendering tricks that were easy to do in glqwcl. They aren't very robust, but they are pretty cool to look at. r_shadows 1 This causes every object to cast a shadow. r_wateralpha 0.7 This sets the opacity of water textures, so you can see through it in properly processed maps. 0.3 is very faint, almost like fog. 1 is completely solid (the default). Unfortunately, the standard quake maps don't contain any visibility information for seeing past water surfaces, so you can't just play quake with this turned on. If you just want to see what it looks like, you can set "r_novis 1", but that will make things go very slow. When I get a chance, I will probably release some maps that have been processed properly for this. r_mirroralpha 0.3 This changes one particular texture (the stained glass texture in the EASY start hall) into a mirror. The value is the opacity of the mirror surface.