FreeTrack.cpp

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#include "FreeTrack.h"

#include "Viewscreen.h"

FreeTrack::FreeTrack(Viewscreen* prmViewscreen)
{
        viewscreen = prmViewscreen;
        logger = viewscreen->logger;
        pData = &data;

        // load DLL file
        hinstLib = LoadLibrary(L"FreeTrackClient.dll");
        if (hinstLib == nullptr)
                logger->Log("FreeTrack: Unable to load DLL", Logger::Level::Fatal);

        logger->Log("FreeTrack: DLL loaded!");

        // get function pointers
        getData = reinterpret_cast<importGetData>(GetProcAddress(hinstLib, "FTGetData"));
        getDllVersion = reinterpret_cast<importGetDllVersion>(GetProcAddress(hinstLib, "FTGetDllVersion"));
        reportID = reinterpret_cast<importReportID>(GetProcAddress(hinstLib, "FTReportName"));
        provider = reinterpret_cast<importProvider>(GetProcAddress(hinstLib, "FTProvider"));

        // check they are valid
        if (getData == nullptr) 
                logger->Log("FreeTrack: Unable to find 'FTGetData' function", Logger::Level::Fatal);
        if (getDllVersion == nullptr) 
                logger->Log("FreeTrack: Unable to find 'FTGetDllVersion' function", Logger::Level::Fatal);
        if (reportID == nullptr) 
                logger->Log("FreeTrack: Unable to find 'FTReportID' function", Logger::Level::Fatal);
        if (reportID == nullptr) 
                logger->Log("FreeTrack: Unable to find 'FTProvider' function", Logger::Level::Fatal);

        // print the address of each function
        char msg[99];
        sprintf_s(msg, 99, "FreeTrack: FTGetData is at address: 0x%p", getData);
        logger->Log(msg);
        sprintf_s(msg, 99, "FreeTrack: FTGetDllVersion is at address: 0x%p", getDllVersion);
        logger->Log(msg);
        sprintf_s(msg, 99, "FreeTrack: FTReportID is at address: 0x%p", reportID);
        logger->Log(msg);
        sprintf_s(msg, 99, "FreeTrack: FTProvider is at address: 0x%p", provider);
        logger->Log(msg);

        // call each function and display result
        sprintf_s(msg, 99, "FreeTrack: DLL Version: %s", getDllVersion());
        logger->Log(msg);
}

void FreeTrack::Poll()
{
        try
        {
                if (getData(pData))
                {
                        viewscreen->targetLeftright = -pData->yaw;
                        viewscreen->targetUpdown = -pData->pitch;
                        viewscreen->rolltilt = pData->roll;

                        // 30 cm (11.811 inches) gives us a value of 75 by default? converted to km
                        x = -pData->x * 0.0000004f;
                        y = -pData->z * 0.0000004f;
                        z = pData->y * 0.0000004f;
                }
        }
        catch (...)
        {
                logger->Log("FreeTrack: Poll unhandled exception!", Logger::Level::Error);
        }
}

FreeTrack::~FreeTrack()
{
        if (!hinstLib)
                return;

        // unload DLL file
        FreeLibrary(hinstLib);
}