Qfusion

<i>Quake II</i> engine

Quake II engine

Game engine

The Quake II engine is a game engine developed by id Software for use in their 1997 first-person shooter Quake II.[1] It is the successor to the Quake engine. Since its release, the Quake II engine has been licensed for use in several other games.[2]

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One of the engine's most notable features was out-of-the-box support for hardware-accelerated graphics, specifically OpenGL, along with the traditional software renderer.[2] Another interesting feature was the subdivision of some of the components into dynamic-link libraries. This allowed both software and OpenGL renderers, which were selected by loading and unloading separate libraries. Libraries were also used for the game logic, with consequences including:

  • Since they were compiled for specific platforms, instead of an interpreter, they could run faster than Quake's solution, which was to run the game logic (QuakeC) in a limited interpreter.[3]
  • id could release the source code to allow modifications while keeping the remainder of the engine proprietary.[4]

The level format, as with previous id Software engines, used binary space partitioning. The level environments were lit using lightmaps, a method in which light data for each surface is precalculated (this time, via a radiosity method) and stored as an image, which is then used to determine the lighting intensity each 3D model should receive, but not its direction.[5][6]

id Software released the source code on December 22, 2001, under the terms of the GNU General Public License v2.0 or later.[7]

Games using the Quake II engine

Games using a proprietary license

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Games based on the GPL source release

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Ports

  • Jake2 is a Java port of the Quake II engine's GPL release. It has since been used by Sun as an example of Java Web Start capabilities for games distribution over the Internet.[10] In 2006, it was used to experiment playing 3D games with eye tracking.[11] The performance of Jake2 is on par with the original C version.[12]
  • Yamagi Quake II is a port of Quake II to modern systems which aims to preserve the original gameplay.[13][14][15][16]
  • vkQuake2 is the original Quake II engine with additional Vulkan renderer created by Krzysztof Kondrak, a programmer from Poland. It was originally released in December 2018 under the GPLv2.[17][18]
  • Qfusion is a modification of the GPL version of the engine. The engine was used in the 2012 game Warsow.[8][9]

See also

References

  1. [1]
    Grant, Christopher (August 9, 2011). "id Software looking to shorten dev cycles, stop building new engines for every game". Joystiq. AOL. Archived from the original on August 28, 2011.
  2. [2]
    "Technology Licensing: id Tech 2". Archived from the original on November 8, 2009. Retrieved September 17, 2008.
  3. [3]
    Sanglard, Fabien (September 16, 2011). "Quake 2 Source Code Review 2/4". fabiensanglard.net. Retrieved July 29, 2023. Dynamic linking provided numerous advantages: [...] Full native speed for mods, no need to rely on QuakeC and Quake Vitual machine.
  4. [4]
    Sanglard, Fabien (September 16, 2011). "Quake 2 Source Code Review 2/4". fabiensanglard.net. Retrieved July 29, 2023. Dynamic linking provided numerous advantages: [...] More capabilities to mod makers, the entire game could be altered via game.dll.
  5. [5]
    Milne, Rory (March 1, 2019). "The making of Quake 2". pcgamer.com. Retrieved July 29, 2023. We also had light bouncing—simulated radiosity—so every corner of the world had some lighting.
  6. [6]
    Sanglard, Fabien (September 16, 2011). "Quake 2 Source Code Review 3/4". fabiensanglard.net. Retrieved July 29, 2023. Contrary to Quake1, Quake2 used radiosity and colored light during the precalculation.
  7. [7]
    DiBona, Chris (December 22, 2001). "Quake 2 Source Code Released Under the GPL". Slashdot. Retrieved September 4, 2016.
  8. [8]
    Dolinsky, Sergey (2008). "Открытые бета-тесты декабря". Strana Igr (in Russian). No. 250. Gameland. p. 142.
  9. [9]
    "Warsow". Level (in Romanian). No. 4/2008. April 2008. p. 7.
  10. [10]
    "JDK 6u10: Jake2: Quake II in Java". Sun Microsystems. Retrieved July 27, 2023. The Jake2 applet example shows the future of game distribution over the Internet. Jake2 is a port of id Software's Quake II to the Java platform developed by Bytonic Software. (...). With the new Java Plug-In, it is now possible to deploy the game directly into the web page with full hardware acceleration and rock-solid reliability.
  11. [11]
    Miller, Ross (August 3, 2006). "Play with your eyes". Joystiq. Archived from the original on February 3, 2008. Retrieved July 18, 2009.
  12. [12]
    "Q24j: Jake and Java-gaming Viability". O'Reilly Media. November 28, 2005. Retrieved July 18, 2009. This is a great show of 3D prowess. Things like this, as well as the Narya 2D open source engine from ThreeRings really are starting to at least show Java can serve as a first-class gaming platform. More than that, just having seen all the… *cough* horrible code in games before, having things like Java's threading model, network and database support might really make it a BETTER platform for a lot of forthcoming games than C.
  13. [13]
    Dawe, Liam (July 21, 2021). "Alternate Quake II game engine Yamagi Quake II adds optional Vulkan support". GamingOnLinux. Retrieved July 29, 2023.
  14. [14]
    Burmeister, Yamagi. "Yamagi Quake II project page". Retrieved July 29, 2023.
  15. [15]
    "Quake 2 - Source Ports". GOG.com. Retrieved March 27, 2022.
  16. [16]
    "Quake II: Quad Damage Review". Gaming Pastime. August 18, 2017. Retrieved July 29, 2023.
  17. [17]
    Larabel, Michael (December 20, 2018). "Quake 2 Gets A Vulkan Renderer 21 Years After Release". Phoronix. Retrieved December 20, 2018.
  18. [18]
    "vkQuake2 on GitHub". GitHub. December 19, 2022.
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