Writing Native Code

Resources

Media:Headers.zip

Unreal Tournament headers modified to be as compatible as possible with RC.

Media:Debug.zip

Native coding example that implements the game's main loop and adds useful features like a framerate cap that can be set using a new custom console command ("SetRefreshrate") and error handling using Message boxes that show the stack trace in case of a crash. Also have a look at Republic Commando UCC

Code

This code assumes that the folders with the headers for Core and Engine are in the same directory as the source file

//Linking the import libraries for Core.dll and Engine.dll so that functions from these libraries can be called
#pragma comment(lib, "Core/lib/Core.lib")
#pragma comment(lib, "Engine/lib/Engine.lib")

//Includes the headers for core and engine
#include "Engine/Inc/Engine.h"

//This function is going to replace appInit from UnFile.h and thus needs to have the same signature
__declspec(dllexport) void testFunc(const char* InPackage, const char* InCmdLine, FOutputDevice* InLog, FOutputDeviceError* InError,
                                    FFeedbackContext* InWarn, FConfigCache*(*ConfigFactory)(), int RequireConfig){
    const char* newCmdLine = "-windowed -log abcdefg 12345";

    InLog->Logf("Replacing command line with %s", newCmdLine);

    appInit(InPackage, newCmdLine, InLog, InError, InWarn, ConfigFactory, RequireConfig);
}

Making The Game Call Custom Code