LPMud

LPMud, abbreviated LP, is a family of MUD server software. Its first instance, the original LPMud game driver, was developed in 1989 by Lars Pensjö (hence the LP in LPMud).^[1][2][3] LPMud was innovative in its separation of the MUD infrastructure into a virtual machine (known as the driver) and a development framework written in the LPC programming language (known as the mudlib).^[4]

Motivation

Pensjö had been an avid player of TinyMUD and AberMUD. He wanted to create a world with the flexibility of TinyMUD and the style of AberMUD.^[5] Furthermore, he did not want to have sole responsibility for creating and maintaining the game world. He once said, "I didn't think I would be able to design a good adventure. By allowing wizards coding rights, I thought others could help me with this."^[6] The result was the creation of a new, C-based, object-oriented programming language, LPC, that made it simple for people with minimal programming skills to add elements like rooms, weapons, and monsters to a virtual world.^[7]

To accomplish his goal, Lennart Augustsson convinced Pensjö to write what today would be called a virtual machine, the LPMud driver. The driver managed the interpretation of LPC code as well as providing basic operating system services to the LPC code. By virtue of this design, Pensjö made it more difficult for common programming errors like infinite loops and infinite recursion made by content builders to harm the overall stability of the server. His choice of an OO approach made it easy for new programmers to concentrate on the task of "building a room" rather than programming logic.^[3]

Evolution of LPMuds

Further information: LPMud family tree

Pensjö's interest in LPMuds eventually waned in the early 1990s, but by that time LPMud had become one of the most popular forms of MUD.^{[citation needed]} His work has been extended or reverse engineered in a number of projects:

• LPMud 3.2, better known as the Amylaar driver, after its lead developer, Jörn "Amylaar" Rennecke^[8][9]
• MudOS^[8]
• DGD, Dworkin's Game Driver, a conceptual rather than code derivative of LPMud developed by Felix "Dworkin" Croes^[10]
• SWLPC, Shattered World's fork of LPMud 2.4.5^[11]

Though an LPMud server can be used to implement nearly any style of game,^[12] LPMuds are often thought of as having certain common characteristics as a genre, such as a mixture of hack and slash with role-playing, quests as an element of advancement, and "guilds" as an alternative to character classes.^[13][14]

LPMud talkers

LPMud was used as the basis for the first Internet talker, Cat Chat, which opened in 1990^[15].

TMI Mudlib

The TMI Mudlib from The Mud Institute^[16] was an attempt to create a framework driven mudlib for the MudOS LPMud driver. It consisted of many contributors to MudOS as well as people who became influential in the LPMud community. When TMI began work in 1992, a mudlib was generally packaged with both an LPMud driver and a complete world built on top of the mudlib. As a framework-driven mudlib, the goal of the TMI mudlib was to provide only examples for world objects and place the burden of building a working world on the game developers using TMI.

TMI implemented the first InterMUD communications network, when MudOS added network socket support in 1992.^[6]

TMI never realized its vision and shut down. It was quickly followed, however, by TMI-2. Unlike TMI, TMI-2 was somewhat independent of the driver team. It leveraged elements of the original TMI mudlib and eventually released a somewhat workable product. Though it never achieved the success of its sibling the Nightmare Mudlib (also based on the original TMI mudlib), it did influence many developers, and the lessons learned with TMI-2 led to the successes of the Lima Mudlib.^{[citation needed]}

In 1992, MIRE, a multi-user information system producing customised newspapers^[17] was built based on a modified TMI driver.^[16]

In 1993, the TMI-2 mudlib was used to create PangaeaMud, an academic research project designed as an interactive geologic database tool.^[18]

Though Lima took lessons from TMI-2, Lima is a completely independent codebase.^{[citation needed]}

TMI-2 is still available, and often used as a learning tool, but not typically used today for new LPMud development.^{[citation needed]}

Notable MUDs based on TMI-derived mudlibs include The Two Towers^{[19][20][21][22][23][24]} set in Tolkien’s universe^[19] and Threshold.

Server software

MudOS is a major family of LPMud server software, implementing its own variant of the LPC (programming language).^[25][26] It first came into being on February 18, 1992.^[27] It pioneered important technical innovations in MUDs, including the network socket support that made InterMUD communications possible^[6][28] and LPC-to-C compilation.^[29] Its name reflects its focus on separation of concerns between game driver and mudlib.^{[citation needed]}

Genocide was an important development testbed for MudOS from 1992 to 1994, but switched back to the main LPMud branch, citing speed concerns.^[30][31]

FluffOS

FluffOS

Original author(s)	Wodan
Developer(s)	Yucong Sun
Stable release	v2019
Repository	https://github.com/fluffos/fluffos
Written in	C++
Platform	Linux, Mac OS X, Windows
Type	MUD driver
Website	www.fluffos.info

FluffOS is originally forked by Wodan from Discworld MUD, released as a roll-up patch to support Discworld MUD. Wodan continues to maintain FluffOS up to version 2.27, and has since FluffOS been maintained by Yucong Sun. FluffOS right now has release version 2017 and version 2019 in development. The FluffOS codebase contains source release of MudOS all the way up to mudos-0.8.14, and has largely maintained backward compatibility for LPMUD code written for MudOS v22, with many more modern features.

FluffOS v2019 uses c++ 17, has a modern cmake build system, and able to compile and run on latest Ubuntu and Mac OS X;Native windows support is still under development.

FluffOS is already being deployed in production with a lot of Chinese LPMUDs, with an active community.

See also

• Chronology of MUDs

References

1. Bartle, Richard (2003). Designing Virtual Worlds. New Riders. p. 10. ISBN 0-13-101816-7. LPMUD was named after its author, Lars Pensjö of the University of Gothenburg, Sweden.
2. Shah, Rawn; Romine, James (1995). Playing MUDs on the Internet. John Wiley & Sons, Inc. p. 158. ISBN 0-471-11633-5. ... the original Mudlib distributed by LP, Lars Pensjö, and his team.
3. . Pike. Archived from the original on 2010-02-04. Retrieved 2009-09-09. In the beginning, there was Adventure. Then a bunch of people decided to make multi-player adventure games. One of those people was Lars Pensjö at the Chalmers university in Gothenburg, Sweden. For his game he needed a simple, memory-efficient language, and thus LPC (Lars Pensjö C) was born. About a year later Fredrik Hübinette started playing one of these games and found that the language was the most easy-to-use language he had ever encountered.
4. Bartle, Richard (2003). Designing Virtual Worlds. New Riders. p. 43. ISBN 0-13-101816-7. Above this layer is what (for historical reasons) is known as the mudlib⁵⁸. [...] ⁵⁸For "mud library". MUD1 had a mudlib, but it was an adaptation of the BCPL input/output library and therefore was at a lower level than today's mudlibs. The modern usage of the term was coined independently by LPMUD.
5. Bartle, Richard (2003). Designing Virtual Worlds. New Riders. p. 10. ISBN 0-13-101816-7. Having played both AberMUD and TinyMUD, he decided he wanted to write his own game with the adventure of the former and the user-extensibility of the latter.
6. Mulligan, Jessica; Patrovsky, Bridgette (2003). Developing Online Games: An Insider's Guide. New Riders. p. 451. ISBN 1-59273-000-0. 1989 [...] Lars Penjske creates LPMud and opens Genesis. "Having fun playing TinyMUD and AberMUD, Lars Penjske decides to write a server to combine the extensibility of TinyMUD with the adventures of AberMUD. Out of this inspiration, he designed LPC as a special MUD language to make extending the game simple. Lars says, '...I didn't think I would be able to design a good adventure. By allowing wizards coding rights, I thought others could help me with this.' The first running code was developed in a week on Unix System V using IPC, not BSD sockets. Early object-oriented features only existed accidentally by way of the nature of MUDs manipulating objects. As Lars learned C++, he gradually extended those features. The result is that the whole LPMud was developed from a small prototype, gradually extended with features." —George Reese's LPMud Timeline
7. Giuliano, Luca [in Italian] (1997). I padroni della menzogna. Il gioco delle identità e dei mondi virtuali [The masters of the lie: the play of identity and virtual worlds] (in Italian). Meltemi Editore. pp. 101–102. ISBN 978-88-86479-35-6. È stato creato nel 1990 da Lars Pensjö presso la Chalmers Academic Computing Society in Svezia. Pensjö proveniva dall'esperienza dell'AberMUD e il suo sistema è sostanzialmente il frutto di un compromesso tra la rigidità di AberMUD e l'egualitarismo del TinyMUD. Il server LPMUD è diverso dagli altri perché non è un gioco prefabricato ma un linguaggio, chiamato LPC, che gli utenti possono utilizzare per interagire, modificare il loro ambiente e costruire un gioco. Un DikuMUD è molto più efficiente come programma ma non può essere modificato senza avere un alto livello di conoscenza nella programmatazione. Invece un LPMUD è molto più flessible ed è possibile costruire anche oggetti molto complessi con un livello di conoscenza inferiore. Grazie a questa flessibilita, che si adatta all'immaginazione dei giocatori, LPMUD si è diffuso rapidamente. Il livello di programmazione degli oggetti però non è esteso a tutti, ma è limitato ai giocatori che hanno raggiunto un livello elevato di competenza all'interno del MUD stesso e delle sue regole. Grazie a questo maggior controllo del mondo, un LPMUD tende ad essere più organico e coerente nella construzione del mondo, diversamente dal TinyMUD che tende invece a diventare un po' caotico. Translation: It was created in 1990 by Lars Pensjö of the Chalmers Academic Computing Society in Sweden. Pensjö's experience was with AberMUD, and its system is basically the result of a compromise between the rigidity of AberMUD and the egalitarianism of TinyMUD. The LPMUD server is different from others because it is not a game but a prefabricated language called LPC, which users can use to interact, change their environment and build a game. A DikuMUD is much more efficient as a program but cannot be changed without having a high level of programming knowledge. On the other hand, LPMUD is much more flexible, and you can build very complex objects with a lower level of knowledge. Thanks to this flexibility, which adapts to players' imagination, LPMUD has spread rapidly. The level of programming objects is not for everyone, but is limited to players who have reached a high level of competence within the MUD itself and with its rules. Thanks to this greater control of the world, a LPMUD tends toward more comprehensive and coherent construction of the world, unlike TinyMUD, which tends to get a little chaotic.
8. Towers, J. Tarin; Badertscher, Ken; Cunningham, Wayne; Buskirk, Laura (1996). Yahoo! Wild Web Rides. IDG Books Worldwide Inc. p. 141. ISBN 0-7645-7003-X. MudOS and Amylaar:: There are a couple versions of LPmuds that you might run into. More are being developed as coders and wizards improve their games. Both MudOS and Amylaar are descendants of LPmuds, and Amylaar is an especially popular version.
9. Reese, George (1998-09-15). "LPMud FAQ". Internet FAQ Archives. Retrieved 2009-06-25. Amylaar is a person, not an LPMud. He is the primary author and torch bearer of the LPMud name. Given the generic sound of the term "LPMud" these days, people often refer to LPMud 3.2 as the Amylaar driver.
10. Shah, Rawn; Romine, James (1995). Playing MUDs on the Internet. John Wiley & Sons, Inc. p. 164. ISBN 0-471-11633-5. DGD, created by Dworkin aka Felix Croes, is a complete rewrite of the LPmud game.
11. Reese, George (1998-09-15). "LPMud FAQ". Internet FAQ Archives. Retrieved 2009-06-25. Shattered Worlds, on the otherhand, derives from LPMud 2.4.5.
12. Hahn, Harley (1996). The Internet Complete Reference (2nd ed.). Osborne McGraw-Hill. p. 557. ISBN 0-07-882138-X. The original LPC language was designed to create hack-n-slash muds. If you heard that a particular mud was an LPMud, you could guess what type of mud it was. In recent years, though, LPC has been redesigned into a general-purpose mud-creation language and, nowadays, virtually any type of mud might be an LPMud.
13. Ito, Mizuko (1997). "Virtually Embodied: The Reality of Fantasy in a Multi-User Dungeon". In Porter, David (ed.). Internet Culture (pbk. ed.). Routledge. p. 89. ISBN 0-415-91684-4. The MUDs that I study are LPMUDs, which are "traditional" and "mainstream" MUDs in the sense that they are combat and role-playing game oriented, and tend to use medieval images.
14. Towers, J. Tarin; Badertscher, Ken; Cunningham, Wayne; Buskirk, Laura (1996). Yahoo! Wild Web Rides. IDG Books Worldwide Inc. p. 141. ISBN 0-7645-7003-X. LPmuds: When you play LPmuds, you'll probably be faced with more of a bent toward socialization and an attempt to get characters to role-play more. Quests, where you have to complete a predetermined set of actions, tend to be used to try to move people away from relying simply on combat to gain experience. When you first enter the game, your character has no profession until you join a guild, which you usually need to search around for. It is normally against the rules for seasoned characters to help you with your quests or finding a guild, but some LPmuds do not enforce this.
15. "Talker History". NetLingo the Internet Dictionary. Retrieved 2010-04-13. Single-server talkers on the internet first appeared in 1990, with the talker Cat Chat. This was a hack of the LPMud source code, put together by Chris Thompson (aka 'Cat') at Warwick University, in England.
16. Takacs, Mark (August 17, 1993). "Prolix A Text-based Participant System for VR". Washington: 13. CiteSeerX 10.1.1.53.5993. 2.3.7 MIRE Kay has taken a TMI LPMud driver (a popular alternative driver developed by The Mud Institute) and used it as the basis for a multi-user news and information retrieval system {{cite journal}}: Cite journal requires |journal= (help)
17. Electronic Publishing Group at the MIT Media Lab. 25+ Years of the Electronic Publishing Group "MIRE--news in a MUD"
18. Boring, Erich (1993-12-03). PangaeaMud: An Online, Object-oriented Multiple User Interactive Geologic Database Tool (PDF) (Master's thesis). Miami University. Retrieved 2010-05-03.
19. English, Katharine, ed. (1996). Most Popular Web Sites: The Best of the Net from A 2 Z. Lycos Press / Macmillan Publishers. p. 315. ISBN 0-7897-0792-6. Two Towers Multi-User Dungeon http://www.angband.com/towers This page serves as an entrance to the Two Towers Multi-User Dungeon, allowing game players to step into the world of fantasy writer J.R.R. Tolkien. Intrepid visitors can learn about the game or link to Tolkien sites dotting the net.
20. Smith, Bud; Bebak, Arthur (1997). Creating Web Pages for Dummies (2nd ed.). IDG. pp. 40–41. ISBN 0-7645-0114-3.
21. Jones, Nimrod (April 1997). . Archived from the original on 2011-07-22. Retrieved 2010-07-20. The MUD referred to in this work is The Two Towers LpMUD based upon J. R. R. Tolkien's Lord of the Rings. It claims to be the most faithful MUD to his Middle-Earth and boasts players in their hundreds gathered from 50 countries world-wide.
22. "Tolkien Gaming - Gaming Havens - Game Reviews - Two Tower MUD". theonering.net. 2000-05-23. Retrieved 2010-10-15. The experience system was very simple, you kill things and complete missions, you get more attributes.
23. Ekman, Fredrik (1995-05-09). "LP mud's". rec.arts.books.tolkien. Retrieved 2010-07-05.
24. "The MUD Connector: The Two Towers". The MUD Connector. Retrieved 2010-07-06. Highly customized TMI-2 1.1.1 mudlib on MudOS v22 (May 4, 2007)
25. Towers, J. Tarin; Badertscher, Ken; Cunningham, Wayne; Buskirk, Laura (1996). Yahoo! Wild Web Rides. IDG Books Worldwide Inc. p. 141. ISBN 0-7645-7003-X. MudOS and Amylaar:: There are a couple versions of LPmuds that you might run into. More are being developed as coders and wizards improve their games. Both MudOS and Amylaar are descendants of LPmuds, and Amylaar is an especially popular version.
26. Busey, Andrew (1995). Secrets of the MUD Wizards. SAMS Publishing. p. 216. ISBN 0-672-30723-5. For example, the MudOS server is based on the LPMUD server, but has been developed along different lines than the current LPMUD server.
27. Reese, George (1995-08-01). . Archived from the original on February 26, 2012. February 18, 1992 The LPMud 3.1.2-A project is renamed MudOS.
28. Shah, Rawn; Romine, James (1995). Playing MUDs on the Internet. John Wiley & Sons, Inc. p. 164. ISBN 0-471-11633-5. MudOS is a much enhanced version that was a major rewrite that is not compatible with the old 2.4.5 LPmud version. It is one of the most feature-rich Mud systems available, making the game seem almost like a high-level operating system of its own. You can create objects within the Mud that can directly access the Internet Protocols, such as Transmission Control Protocol (TCP) and User Datagram Protocol (UDP); [...]
29. Reese, George (1995-08-01). . Archived from the original on 2012-02-26. BeekOS is basically a MudOS core with dynamic compilation of LPC->C, linking the compiled machine code to the running server dynamically. These enhancements are later merged into MudOS once Beeks takes over MudOS development.
30. Reese, George (1996-03-11). . Archived from the original on 2012-02-26. Retrieved 2010-04-14. June 1992 ¶ After having taken over as admin of Genocide in April, Blackthorn decides to move Genocide over to the new MudOS driver. At this time, the driver was filled with new features, but equally filled with bugs. Genocide spent most of the summer as a testbed for MudOS development, with MudOS developers Truilka, Jacques, and Wayfarer working along on the driver over on Portals.
31. Reese, George (1996-03-11). . Archived from the original on 2012-02-26. Retrieved 2010-04-14. Early 1994 ¶ Genocides [sic] converts over to LPMud in order to get the unusual speed demands made of it by its theme and its old machine. As a result, Blackthorn stops with the trickle of bug-fixes which had been the whole of MudOS development at the time.

Further reading

• Shah, Rawn (1995). "Part 2: LPmuds". In Shah, Rawn; Romine, James (eds.). Playing MUDs on the Internet. John Wiley & Sons, Inc. pp. 155–231. ISBN 0-471-11633-5.
• Busey, Andrew (1995). Secrets of the MUD Wizards. SAMS Publishing. ISBN 0-672-30723-5.

External links

• LPMud FAQ
• LDMud Website
• LPMuds.net - A resource for MUDs that use LPC.
• MUDseek - A Google custom search engine for MUDs.
• The LPmuds.net downloads page has a driver-bundled version of TMI-2 that's "easy-ish" to install.
• LPMuds at Curlie