https://github.com/mohd-akram/st

C port of Ken Thompson's Space Travel
https://github.com/mohd-akram/st

c game ken-thompson space space-travel unix

Last synced: about 1 month ago
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C port of Ken Thompson's Space Travel

• Host: GitHub
• URL: https://github.com/mohd-akram/st
• Owner: mohd-akram
• Created: 2023-01-23T12:31:20.000Z (over 2 years ago)
• Default Branch: master
• Last Pushed: 2024-09-18T04:04:08.000Z (7 months ago)
• Last Synced: 2025-03-14T08:05:46.487Z (about 1 month ago)
• Topics: c, game, ken-thompson, space, space-travel, unix
• Language: C
• Homepage: https://akr.am/st
• Size: 161 KB
• Stars: 136
• Watchers: 5
• Forks: 13
• Open Issues: 3
• Metadata Files:
  • Readme: README.md

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README

        
# Space Travel

This is a C port of Ken Thompson's

[Space Travel](https://en.wikipedia.org/wiki/Space_Travel_\(video_game\)),

ported from PDP-7 assembly. The original source files are in `src/cmd/st*.s`

in the [pdp7-unix](https://github.com/DoctorWkt/pdp7-unix) repository. The game

is available to [play online](https://akr.am/st) via WebAssembly.

## Install

The SDL2 library is required.

Run `make` to build `st`.

Run `make install` to install to `/usr/local/bin`.

Run `make wasm` (requires [Emscripten](https://emscripten.org)) to build a

WebAssembly version of the game. To play it, launch a web server via

`python3 -m http.server -d html` and go to http://localhost:8000.

## Controls

| Key | Action       |

|-----|--------------|

| 1   | Quit         |

| 2   | New game     |

| 3   | Thrust down  |

| 4   | Thrust up    |

| 5   | Yaw right    |

| 6   | Yaw left     |

| 7   | Scale up     |

| 8   | Scale down   |

You can also use the arrow keys for yaw and scale.

## Gameplay

> For controls, there were several buttons: jet forward, jet back, turn left,

> turn right; go up scale on the display, go down scale. The acceleration of

> the ship was fixed, but it scaled with the display scale--it was thus fixed

> in terms of pixels/sec/sec. Normally the ship was in the center of the screen

> and always pointed up; the display showed the plan view of the solar system,

> so that the "rotate" controls rotated the solar system around you on the

> display.

>

> No relativity; scale up enough and you travel to Pluto in a few seconds. But

> don't scale up too much, or you might not find the Solar System again without

> restarting.

>

> The object of the game was simply to fly around, get into orbits, land.

> "Land" meant to cross the surface with a small enough speed.

>

> *[Space Travel: Exploring the solar system and the

> PDP-7](https://www.bell-labs.com/usr/dmr/www/spacetravel.html) by Dennis

> Ritchie*

The current dominating attractor, scale, and landing status (L/CL for

landed/crash landed) are displayed at the bottom. The moving dot on the line

below the main view represents the horizontal velocity relative to the current

dominating attractor.