Manipulate water droplets in a snake-inspired game using a joystick, featuring the innovative use of 'Water Pixels'
**Introduction**
Steve Mould, a renowned science communicator, has taken the classic Snake game to a new level by transforming it into a digital microfluidics-based game using the OpenDrop device. This unique setup, originally designed for lab experiments, has been repurposed into a one-of-a-kind gaming console that combines physics, engineering, and coding.
**The Technical Setup**
The heart of this innovative gaming rig is the OpenDrop, an open-source digital microfluidics platform, which serves as the game's playing surface [1][2]. The surface consists of an 8x14 grid of electrodes, each coated with a dielectric (insulating) layer [2]. The grid allows for the precise movement of water droplets, which act as the game's pixels, by attracting or repelling them using bipolar molecules of water and dielectric materials [1][2][4].
**Gameplay Dynamics**
In this water-based version of Snake, the main water droplet represents the snake's head. As it "eats" targets (other droplets), additional droplets are added to the snake's body, visually elongating it [1][2]. The path of the droplet is traced as it moves across the grid, controlled by a joystick or similar input [1].
The game introduces real-world physics challenges, as water droplets don't always move predictably due to surface tension, evaporation, and other fluid dynamics [2]. This adds an element of unpredictability to the game, making it more engaging and challenging.
**Coding and Software**
The OpenDrop's open-source nature allows enthusiasts to modify and expand the system, including coding new games or features [2]. The custom software interprets joystick inputs, calculates the snake's path, and triggers the appropriate electrodes to move the droplet accordingly. This requires careful consideration of the physical behavior of water droplets, making gameplay both a programming and a physics challenge [2].
**Scientific and Educational Value**
This project demonstrates the potential of lab equipment for creative and educational applications. It offers a tangible, visual way to explore microfluidics, electrostatics, and coding, making abstract concepts accessible and engaging [1][2].
**The OpenDrop Challenge**
Steve Mould has challenged the community to craft a working implementation of Tetris on the dielectric platform, offering a prize for the most successful creation [3]. Every time a smaller droplet is grabbed, the snake grows bigger, making the game progressively difficult as a bigger water droplet is harder to control [5].
**Conclusion**
Playing Snake on a water droplet-based digital microfluidic surface with the OpenDrop device merges classic gaming with cutting-edge microfluidics. By using electric fields to maneuver real water droplets, the system offers a novel, interactive way to explore both gaming and science, underpinned by creative coding and open-source collaboration [1][2][4].
[1] Steve Mould (2022). Playing Snake on a water droplet using OpenDrop. [Online]. Available: https://www.youtube.com/watch?v=4u8LfW4x8m8
[2] OpenDrop Documentation. (n.d.). OpenDrop Documentation. [Online]. Available: https://opendrop.github.io/opendrop_docs/
[3] Steve Mould (2022). Tetris on a water droplet challenge. [Online]. Available: https://twitter.com/mouldingscience/status/1488416616345454594
[4] Steve Mould (2022). The physics of playing Snake on a water droplet. [Online]. Available: https://www.youtube.com/watch?v=gZiM-W3fEZk
[5] Steve Mould (2022). The challenge of controlling larger water droplets in the game. [Online]. Available: https://www.youtube.com/watch?v=lJjQ086yJvY
Events like the Tetris on a water droplet challenge are redefining the gaming landscape by incorporating cutting-edge technology, such as the OpenDrop device, into gameplay. With the increasing use of gadgets in creative ways, we can expect more intriguing technology-based events in the future.
