149 lines
4.5 KiB
Markdown
149 lines
4.5 KiB
Markdown
# Ordoor
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Ordoor is an **unofficial** [game engine recreation](https://en.wikipedia.org/wiki/Game_engine_recreation)
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of the classic game from 1998, [Warhammer 40,000: Chaos Gate](https://en.wikipedia.org/wiki/Warhammer_40,000:_Chaos_Gate)
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**You must have a copy of the original game data to use this project**. GOG is
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the current publisher of this game; [you can purchase it here](https://www.gog.com/game/warhammer_40000_chaos_gate).
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"Warhammer 40,000" is a trademark of Games Workshop, and the game data used by
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Ordoor contains Games Workshop intellectual property. I am confident that this
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project uses all those things in accordance with the
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[Intellectual Property Policy](https://www.games-workshop.com/en-GB/Intellectual-Property-Policy)
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and the license granted when purchasing a copy of the game in question. Do let
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me know if you see or suspect any violation, and I'll address it immediately.
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Ordoor is a portmanteau of Order Door, which is, of course, the opposite of a
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Chaos Gate.
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## Current status
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Some of the original file formats are either partially or fully decoded. Maps,
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menus, and most visual data can be rendered pixel-perfect. Sound can be played
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(with a preprocessing step). Some UI tookit work is done. No game mechanics are
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implemented yet.
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I keep a GIF showcasing interesting progress here:
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I've just been informed that another game from 1998, [Soldiers At War](https://en.wikipedia.org/wiki/Soldiers_at_War),
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seems to use the same engine. Maybe at some point Ordoor will be able to play
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both. Will that need a rename? Hmm. Watch this space.
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## Building from source
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I'm writing code in Go at the moment, so you'll need to have a Go runtime
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installed on your system:
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```
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$ go version
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go version go1.14 linux/amd64
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```
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In addition, you'll also need the following packages installed, at least in
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Debian:
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```
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# apt install libx11-dev libxcursor-dev mesa-common-dev libxrandr-dev \
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libxinerama-dev libgl1-mesa-dev libxi-dev libasound2-dev mpv ffmpeg
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```
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You can then run `make all` in the source tree to get the binaries that are
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present at the moment.
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Place your WH40K: Chaos Gate installation in `./orig` to benefit from automatic
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path defaults. Otherwise, point to it with `-game-path`
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The `view-map` binary attempts to render a map, and is the current focus of
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effort. Once I can render a whole map, including pre-placed characters (cultist
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scum), things can start to get more interesting.
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Current status: almost pixel-perfect map rendering. Static objects (four per map
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coordinate: floor, centre, left, and right) are rendered fine, and each Z level
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looks good. There are a few minor artifacts here and there.
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Characters and animations aren't touched at all yet. Rendering performance is
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poor. No gameplay, no campaign logic. Interaction with the play area is minimal
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and limited to pan, zoom, and click for basic console output.
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Still, I'm proud of myself.
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To run:
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```
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$ make view-map
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$ ./view-map -map Chapter01
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```
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Looks like this:
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Use the arrow keys to scroll around the map, the mouse wheel to zoom, and the
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`1` - `7` keys to change Z level.
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Dependency management uses `go mod`, so ensure you have at least Go 1.11.
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There is the **start** of the menu / campaign flow in a `ordoor` binary:
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```
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$ cp config.toml.example config.toml
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$ make ordoor
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$ ./ordoor
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```
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This plays the introductory videos so far, and nothing else.
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Menus are in the process of being rendered; you can use the `view-menu` binary
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to inspect them:
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```
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make view-menu
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./view-menu -menu ./orig/Menu/Main.mnu
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```
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This menu *displays* OK, including
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## Sound
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Sound is in the very early stages. Chaos Gate uses ADPCM WAV files, which are a
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pain to play in Go, so for now, a preprocessing step that converts them to .ogg
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is used instead. To create ./orig/Wav/*.wav.ogg, run:
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```
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# apt install ffmpeg
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$ ./scripts/convert-wav ./orig/Wav
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```
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As with video playback, the ambition is to *eventually* remove this dependency
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and operate on the unmodified files instead.
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## Miscellany
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"Mission Setup" includes information about available squad types
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From EquipDef.cpp Dumo: CEquipment we learn the following object types:
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0. DELETED
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1. WEAPON
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2. GRENADE
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3. MEDIPACK
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4. SCANNER
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5. GENESEED
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6. CLIP
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7. DOOR KEY
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8. DOOR KEY
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9. DOOR KEY
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10. DOOR KEY
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And we learn they can be "on"....
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0. CHARACTER
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1. VEHICLE
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2. CANISTER
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I'm starting to see some parallels with [this](https://github.com/shlainn/game-file-formats/wiki/)
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in the data formats, and the timeline (1997) seems about right. Worth keeping an
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eye on!
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