A highly inventive individual, going by the online moniker "b33f", has undertaken a fascinating project: the meticulous conversion of the entirety of the groundbreaking 1993 first-person shooter video game, Doom, into the portable document format (PDF). This is not simply a document about Doom, but rather a functional, albeit unconventional, rendition of the game itself. The PDF file, hosted online for public access, leverages the surprising capabilities of the PDF specification to emulate a rudimentary form of interactive gameplay within the confines of a document typically associated with static text and images.
The project utilizes a series of intricately designed pages, each representing a distinct game state or a minor incremental change within the game world. Rather than employing traditional animation or code execution, the "gameplay" progresses by manually navigating through these numerous pages, simulating movement, actions, and even the passage of time within the Doom environment. Each page is a static snapshot, depicting the game's visuals at a specific moment, including elements such as the player's perspective, enemy positions, and the state of the environment. Progression is achieved by clicking hyperlinks embedded within the PDF, each link corresponding to a potential player action, like moving forward, turning, or firing a weapon. Clicking a link transports the user to the page representing the outcome of that action, effectively creating a painstakingly constructed illusion of interactive experience.
While this approach drastically deviates from the original game's real-time dynamics and smooth animation, it serves as a remarkable demonstration of the often-overlooked flexibility inherent in the PDF format. The project is not meant to be a practical replacement for playing the original Doom, but rather an intriguing experiment and a testament to creative problem-solving. It showcases how a seemingly inflexible format can be manipulated to achieve unexpected results, blurring the lines between document and application, and offering a unique, albeit cumbersome, way to experience a classic piece of gaming history within the familiar confines of a PDF reader. The sheer volume of pages required to represent even a small portion of the game highlights the dedication and effort invested in this curious undertaking.
Xavier Toffoli's blog post, "Mac Mini G4 – The best « classic » Macintosh for retro-gaming?", explores the merits of the PowerPC G4-based Mac Mini as a platform for playing older video games, particularly those designed for classic Mac OS and early Intel-based Macs. Toffoli frames his argument by acknowledging the existing popularity of older Macintosh models for retro gaming, such as the iMac G3 and Power Macintosh G3/G4, but posits that the Mac Mini G4 offers a compelling combination of factors that distinguish it as a potentially superior choice.
He highlights the Mac Mini G4's relatively compact size, making it easily transportable and less demanding of desk space compared to its bulkier predecessors. This portability, combined with its relatively low power consumption, contributes to its practicality as a retro gaming machine. Toffoli emphasizes the machine's quiet operation, a significant advantage over the often noisy fans found in older Macs, allowing for a more immersive and less distracting gaming experience.
The author delves into the technical specifications of the Mac Mini G4, explaining how its PowerPC G4 processor, coupled with the capabilities of Mac OS 9 and early versions of Mac OS X, allows for compatibility with a wide range of classic Macintosh games. He notes the system's ability to run both Classic environment software (older Mac OS applications) within OS X and natively boot into OS 9, offering flexibility for different gaming needs. Furthermore, he points out that the Mac Mini G4 can also run early Intel-based Mac games through Rosetta, Apple's software layer for PowerPC emulation on Intel Macs, expanding the potential library of playable titles. This bridging of the PowerPC and Intel eras contributes to the machine's versatility.
Toffoli acknowledges some limitations, such as the Mac Mini G4's integrated graphics, which may struggle with more demanding 3D games designed for later Mac models. He also discusses the potential need for upgrades, such as increasing RAM or installing a larger hard drive, to optimize performance and storage capacity for a larger game library. Despite these limitations, he concludes that the Mac Mini G4, with its balance of performance, compact design, quiet operation, and software compatibility, represents a compelling and arguably optimal choice for enthusiasts seeking a dedicated machine for experiencing the rich history of Macintosh gaming. He underscores the machine's ability to offer a satisfying retro gaming experience across a spectrum of titles, from older Mac OS classics to early Intel-era releases.
The Hacker News post "Mac Mini G4 – The best « classic » Macintosh for retrogaming?" sparked a modest discussion with a few interesting points raised.
One commenter highlights the Mac Mini G4's advantages for retro gaming, specifically its compact size, relatively powerful PowerPC G4 processor, ability to boot into both Mac OS 9 and early versions of OS X, and support for classic Mac games that often struggle on later Intel-based Macs. They also mention the ease of upgrading the RAM and hard drive. This commenter positions the Mini as a good compromise, lacking the expandability of a full tower G4 but offering a more practical and space-saving solution.
Another commenter agrees with the original post's sentiment, emphasizing the Mac Mini G4's balance of performance and affordability, calling it the "sweet spot" for classic Mac gaming. They further note the benefit of its official support for Tiger, which allows for running emulators for other retro systems.
A different commenter expresses nostalgia for this era of Apple hardware, recounting their positive experience using a PowerBook G4. While not directly related to gaming, this comment adds to the overall sentiment of appreciation for the G4 era.
Another contributor points out the potential challenge of finding suitable displays for older Macs, as many modern monitors lack the necessary connections. They suggest exploring solutions like DVI to HDMI converters or specifically seeking out older displays with DVI or VGA inputs. This practical consideration provides valuable context for anyone looking to set up a retro gaming system with a Mac Mini G4.
Finally, a commenter mentions the iBook G4 as another viable, and often cheaper, alternative for retro gaming, although acknowledging its lower performance compared to the Mini.
While the discussion thread is not extensive, it offers valuable insights into the advantages and considerations of using a Mac Mini G4 for retro gaming, touching on aspects like performance, practicality, compatibility, and alternative options.
Summary of Comments ( 57 )
https://news.ycombinator.com/item?id=42678754
Hacker News users generally expressed amusement and appreciation for the novelty of rendering Doom as a PDF. Several commenters questioned the practicality, but acknowledged the technical achievement. Some discussed the technical aspects, wondering how it was accomplished and speculating about the use of vector graphics and custom fonts. Others shared similar projects, like rendering Quake in HTML. A few users pointed out potential issues, such as the large file size and the lack of interactivity, while others jokingly suggested printing it out. Overall, the sentiment was positive, with commenters finding the project a fun and interesting hack.
The Hacker News post titled "Show HN: Doom (1993) in a PDF" generated a fair amount of discussion, with several commenters intrigued by the concept and its execution.
One of the most compelling threads started with a user questioning the practical use of having Doom rendered within a PDF. This sparked a discussion about potential applications, with some suggesting it could be used for archival purposes, preserving the game in a format less susceptible to software and hardware obsolescence. Others saw it as a novelty or a technical curiosity, appreciating the ingenuity involved in rendering a dynamic game within a static document format. The creator of the PDF chimed in, explaining that it was mainly a technical experiment, driven by curiosity about the possibilities of the PDF format.
Several users expressed admiration for the technical feat, particularly the implementation of sound within the PDF, which some found surprising. They inquired about the methods used to achieve this, prompting the creator to explain that they utilized the PDF's multimedia capabilities and embedded a MIDI soundtrack.
There was also discussion about the limitations of the PDF version, such as performance issues and the lack of interactivity beyond basic menu navigation. Some users pondered whether it would be possible to incorporate more complex game logic within a PDF, leading to a brief exchange about the potential and limitations of PDF as a platform for interactive applications.
A few commenters also drew parallels to other projects that had explored unconventional ways of running Doom, referencing instances like Doom running on calculators or other limited hardware. This reinforced the theme of technical curiosity and the desire to push the boundaries of what's possible with existing technology.
Finally, there were some lighthearted comments appreciating the quirkiness of the project and its nostalgic connection to the original Doom game.