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Update readme, add screenshots

tags/v1.0-RC1^0
Jens Pitkänen 3 months ago
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# A Walk In A Metro Tunnel
A Walk In A Metro Tunnel is a walking simulator. The environment is the
Ruoholahti-Lauttasaari part of the Helsinki metro, with the interiors
being completely improvised, but the route based on [some plans found
on the internet (page 41)][metro-plan].
A Walk In A Metro Tunnel is a walking simulator. The environment is
the Ruoholahti-Lauttasaari part of the Helsinki metro, with the
interiors being completely improvised, but the route based on [some
plans found on the internet (page 41)][metro-plan].

After writing most of this game, I ran into a problem: the default
floating-point numbers used in GLSL (that is, 32-bit ones) aren't
accurate enough after running them through as many transformations as
the ray marching code does, which results in varying amounts of visual
noise. To preserve compatibility and avoid complexity, I decided to
incorporate the noise into this project. So while one theme of this
game is metros, and the Helsinki Metro specifically, the other part is
about floating-point inaccuracy, and how you can get some
understanding about how floating-point numbers work when their errors
are such a visible part of the world.

The game takes about 25 minutes to walk through completely.

### Controls
- WASD or IJKL to move
- Arrow keys or mouse to look around
- Shift to run
- Q to auto-walk (like pressing W/I continuously, but just one key
press)

#### Configuration keys
- B to toggle head bobbing animation

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