Method update

src/engine/AudioEngine.cpp:287–319

}

void Xaudio2Effect3D::update(std::chrono::system_clock::time_point const & now, bool leftHanded)
{
    using namespace std::chrono;

    float dt = (float)0.001f * duration_cast<milliseconds>(now - prevTime).count();

    affine3 const & xform = transform.get();

    float3 prevP = prevPosition,
           curP = xform.m_translation,
           V = dt * (curP - prevP);

    float3 front = xform.transformVector({ 0.f, 0.f, -1.f }),
           up = xform.transformVector({ 0.f, 1.f, 0.f });

    if (leftHanded)
    {
        emitter.Position = X3DAUDIO_VECTOR(curP.x, curP.y, curP.z);
        emitter.Velocity = X3DAUDIO_VECTOR(V.x, V.y, V.z);
        emitter.OrientFront = X3DAUDIO_VECTOR(front.x, front.y, front.z);
        emitter.OrientTop = X3DAUDIO_VECTOR(up.x, up.y, up.z);
    }
    else
    {
        emitter.Position = X3DAUDIO_VECTOR(curP.x, curP.y, -curP.z);
        emitter.Velocity = X3DAUDIO_VECTOR(V.x, V.y, -V.z);
        emitter.OrientFront = X3DAUDIO_VECTOR(front.x, front.y, -front.z);
        emitter.OrientTop = X3DAUDIO_VECTOR(up.x, up.y, -up.z);
    }

    prevPosition = prevP;
    prevTime = now;
}

//
// Xaudio2 engine specialization