FPC DOOM

In this repository i try to port DOOM to Free-Pascal using OpenGL and therefore beeing platform indipendant.

!! Attention !!

This is a work in Progress, don't expect anything to work (yet)..

The original code was released by id-Software unfortunatunelly i was not able to get the code running so i decided to use the crispy-doom version as base (as this one directly compiled and was able to start and play the .wad files i have had laying around).

Also i found some usefull documentations that try to explain the code:

• https://fabiensanglard.net/doomIphone/doomClassicRenderer.php
• https://doomwiki.org/wiki/Doom_source_code
• https://doom.fandom.com/wiki/Doom_source_code
• https://doom.fandom.com/wiki/Doom_source_code_files

There is already a FPC Doom on the List of ports, but that version only supports DirectX and therefore only supports Windows platform.

What needs to be done to compile the code

• install Lazarus-IDE
• install package LazOpenGLContext (is shipped with lazarus)
• download dglOpenGL.pas and store it in the units folder

What needs to be done to play the game

• get a valid .wad file and copy it where the binary is beeing created (or use this shareware version)
• wait until this repository has have enough progress to be a playable game (see section progress)
• start the application

progress:

• got crispy-doom compiled
• created initial FPC_DOOM Lazarus project
• (2025.01.03) stored everything on Github
• able to extract icon from doom_icon.pas
• w_wad.pas can now "load" the .wad file
• (2025.01.09) able to store "patches" when drawn as .bmp files to harddisc, very first extracted image "M_DOOM"
• (2025.01.10) activate OpenGL Rendering default upscale = 2
• (2025.01.12) integrate keyboard event loop and main menu with quit button
• (2025.01.13) finish part of menues necessary to actually start a game
• (2025.01.20) finish wipe function
• (2025.01.22) able to create very first screenrendering
  still missing flats..
• (2025.01.23) finally was able to enable flats