DOOM

Modern linux version of DOOM

Major changes

• X11 code rewrite
• OpenAL sounds
• Fluidsynth / ALSA MIDI music

Dependencies

• X11
• OpenAL
• FluidSynth or ALSA for music
• OpenGL + GLEW (not strictly necessary, see below)

Additional requirements

FluidSynth: Appropriate soundfont

If you want to use FluidSynth, you will also need a soundfont.

Recommended: https://archive.org/download/SC55EmperorGrieferus/Roland%20SC-55%20v3.7.sf2

WADfile

You're going to need a WADfile for playing DOOM. I recommend you buy a copy of the original game through Steam.

(By the way, DOOM Eternal also gives you the WADs for DOOM I and II)

Instructions

Part 1: Basics

1. Clone the code

Part 2: Setting up the music

- FluidSynth (recommended):

1. Edit the SOUNDFONT= line in the Makefile to point to the soundfont you wish to use
2. Make sure the line USE_FLUIDSYNTH=1 is not commented out (so make sure that it does not have a hashtag in front of it)
3. Make sure that the MUSIC_TYPE is set to fluidsynth.

- ALSA_SEQ:

1. Edit the MIDI_PORT= line in the Makefile to the MIDI port that your MIDI synthesizer uses (You can find the connected MIDI device ports by running aplaymidi -l)
2. Make sure the line USE_ALSA_SEQ=1 is not commented out (so make sure that it does not have a hashtag in front of it)
3. Make sure that the MUSIC_TYPE is set to alsa_seq.

Part 3: Compiling and running

1. Compile with make (you might need to run make -B if you've changed the Makefile)
2. Put the WADfile in the wads folder
3. Run make run
4. Have fun!

Movement

Default

• You can use WASD to move around and use your mouse to look left/right.
• The interact key is E.
• Sprinting is on LSHIFT.
• You can shoot with the left mouse button.

Original movement

You can go back to the original movement by disabling the -DFPSMOVE flag in the Makefile.

The old mouse movement can be enabled in the Makefile with the -DMOUSEMOVE flag.

After changing the Makefile, run make -B to recompile.

OpenGL

This project uses OpenGL to accelerate image processing and to display the image. (no actual graphics rewrite)

An older version of OpenGL using immediate mode can be enabled by uncommenting the GL2=1 line in the Makefile.

Alternatively X11 primitives can be used for rendering by commenting out the line USE_OPENGL=1.

Again, you'll need to run make -B to recompile.

License

This project is licensed under the GPLv2 license. See LICENSE for a copy of the text.