MarkerBeacons.cpp

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#include "Module.h"
#include "../GridProperties.h"
#include "../MathUtilities.h"

void MarkerBeacons::FrameMove(float fElapsed)
{
        if (!sound)
                return;

        switch (checking)
        {
        case Bus::MarkerBeaconTypes::Outer: // 1 NM (1.85km) inside of the FAF LUMEN
                Check(D3DXVECTOR3(-1285.193f, -2633.716f, 231.8641f));
                checking = Bus::MarkerBeaconTypes::Middle;
                break;
        case Bus::MarkerBeaconTypes::Middle: // 0.5-0.8 NM (1km) from threshold (DH point) (actually 2km in our case)
                Check(D3DXVECTOR3(-1285.639f, -2634.818f, 218.8949f));
                checking = Bus::MarkerBeaconTypes::Inner;
                break;
        case Bus::MarkerBeaconTypes::Inner: // threshold
                Check(D3DXVECTOR3(-1285.7f, -2634.95f, 216.924f));
                //checking = Bus::MarkerBeaconTypes::Outer;
                //break;
        case Bus::MarkerBeaconTypes::None:
                checking = Bus::MarkerBeaconTypes::Outer;
                break;
        }
}

void MarkerBeacons::Check(const D3DXVECTOR3& marker) const
{
        float volume = 0.0f;

        if (ourcockpit.power > 0.5f && playerships[0].reference == REF_APNMODE && gridProperties->markerBeaconsPowered)
        {
                const D3DXVECTOR3 diff = marker - playerships[0].position;
                const float dist = D3DXVec3Length(&diff);
                // The valid signal area is a 2,400 ft (730 m) × 4,200 ft (1,280 m) ellipse (as measured 1,000 ft (300 m) above the antenna.)
                // If he is traveling 165 knots on final that is 85 m/s 8 seconds or 680 meters
                // 0 meters, lets limit to 300 meters? // so at 0 it is 1 and and at 0.3 it is 0
                if (checking == Bus::MarkerBeaconTypes::Inner)
                        volume = Clamp(1.0f - 3.333333f * dist, 0, 1);
                // 300 meters should be 1.0 ... so at 0.3 it is 1, at 1 it is 0
                else if (checking == Bus::MarkerBeaconTypes::Middle)
                        volume = Clamp(1.428571f - 1.428571f * dist, 0, 1);
                else // 840 meters should be 1.0 ... so at .84 it is 1, at 1.84 it is 0
                        volume = Clamp(1.84f - dist, 0, 1);
        }

        if (volume == 0.0f)
        {
                sound->Stop(SOUND_OUTERMARKER + checking - 1);
                bus->MarkerBeacon = Bus::MarkerBeaconTypes::None;
        }
        else
        {
                sound->PlayEx(SOUND_OUTERMARKER + checking - 1, true, volume);
                bus->MarkerBeacon = checking;
        }
}

MarkerBeacons::MarkerBeacons(Bus* prmBus, Logger* prmLogger, Sound* prmSound, GridProperties* prmGridProperties) : Module(prmBus)
{
        logger = prmLogger;
        sound = prmSound;
        gridProperties = prmGridProperties;
}