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.
- install Lazarus-IDE
- install package LazOpenGLContext (is shipped with lazarus)
- download dglOpenGL.pas and store it in the units folder
- 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
As this section is not interesting for everyone i extracted this into a separate section lessons learned.
- 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
- (2025.01.24) add ability to rotate player, lets take a shy look around ;)
- (2025.01.25) enable sprite rendering
- (2025.01.26) give the player a weapon
still not able to shoot or move :( - (2025.01.28) enable "normal" map preview
- (2025.01.29) enable am map cheats, and finished am functions
- (2025.01.30) enable forward walking and falling
still no strafe / clipping or interaction with the map - (2025.02.01) enable interaction with doors
