Raycasting example in C++ language with SDL 1.2, see install guide here https://lodev.org/cgtutor/quickcg.html Follow tutorial, test speed change, texture & sprite size change (64x64 to 128x128) with pre-made images
Determine if C++ can easily be compiled for Atari and Dreamcast. If not convert this program to C in next repo. Test adding GFXEngine layer on C++. No networking for now.
A CG library is provided by lodev : quickcg.
Install SDL 1.2 following : https://loka.developpez.com/tutoriel/sdl/installation/linux/
With g++ it's quite easy: place all .cpp and .h files of QuickCG in the same directory, put the example code of tutorials in the main.cpp file, and then you can compile it with the following command:
g++ *.cpp -lSDL -O3
The -O3 is optional if you want compiler optimization. The -lSDL lets it link to SDL. This requires you to have SDL installed on your distro (look for sdl and sdl-devel packages or similar).
FastCG includes a FPS counter.
To rotate a vector, we have to multiply it by the rotaton matrix : [ cos(a) - sin(a) ] [ sin(a) cos(a) ]
When rotating input keys, value of dir and plane change, but remain perpentdicular and with same length. Direction of ray is sum of direction vector and part of the plane vector
Atari ST resolutions : 16colors@320x200 // 4colors@640x200 // BW@640x400 Target PC resolution : 640x480 (use 80 extra height for extra infos)
Either do a makefile with system link to installed C/C++ libraries Or add sources and headers to project for portability JSON for modern C++ lib : https://github.com/nlohmann/json