These headers describe some of the most common structures and enum types for Alpha Centauri: Alien Crossfire.
The files have been tested to work with the GOG version of terranx.exe (3084288 bytes). Compatibility with other versions of the game is uncertain - particularly the function pointers are not expected to work with any other version of the binary. The structures still contain a considerable number of unknown variables - these have been prefixed with unk_ or similar.
To use the headers, simply include them with:
#include "terranx.h"
For more information about the internal game structures, refer to reversing work performed by the alphacentauri2.info forums.