Function getVehicleAudioAttributes

src/OpenLoco/src/Audio/VehicleAudio.cpp:125–151

    }

    static AudioAttributes getVehicleAudioAttributes(const Vehicles::VehicleBase& base, const Vehicles::VehicleSound& soundParams, const Viewport& viewport)
    {
        auto vpPos = World::gameToScreen(base.position, WindowManager::getCurrentRotation());
        const auto uiPoint = viewport.viewportToScreen(vpPos);

        const auto zoomVolumeModifier = getZoomVolumeModifier(viewport.zoom);

        const auto panX = calculatePan(uiPoint.x, Ui::width());
        const auto panY = calculatePan(uiPoint.y, Ui::height());

        const auto undergroundModifier = isUnderground(base.position) ? kVolumeModifierUnderground : 0;

        const auto xFalloffModifier = getFalloffModifier(panX);
        const auto yFalloffModifier = getFalloffModifier(panY);

        const auto falloffVolumeModifier = std::min(xFalloffModifier, yFalloffModifier);

        const auto overallVolumeModifier = std::max(falloffVolumeModifier + undergroundModifier + zoomVolumeModifier, 0);

        const auto volume = std::max(((soundParams.drivingSoundVolume * overallVolumeModifier) / 8) + kVehicleVolumeCalcMin, kVolumeMin);

        AudioAttributes attribs{};
        attribs.volume = volume;
        attribs.pan = panX;
        attribs.frequency = soundParams.drivingSoundFrequency;
        return attribs;
    }

    static void stopVehicleSound(Vehicles::VehicleSound& sound)
    {