Drawing with the debugRenderer

Im trying to draw some geometry with the debugRenderer
Start():

   SubscribeToEvent(E_POSTRENDERUPDATE, URHO3D_HANDLER(MyApp, DrawDebug));

    scene_ = new Scene(context_);
    debugRenderer_ = scene_->CreateComponent<DebugRenderer>();

    // Let the scene have an Octree component!
    scene_->CreateComponent<Octree>();

    // We need a camera from which the viewport can render.
    cameraNode_ = scene_->CreateChild("Camera");
    Camera* camera = cameraNode_->CreateComponent<Camera>();
    camera->SetFarClip(2000);
  
    // Now we setup the viewport. Of course, you can have more than one!
    Renderer* renderer = GetSubsystem<Renderer>();
    SharedPtr<Viewport> viewport(new Viewport(context_, scene_, cameraNode_->GetComponent<Camera>()));
    renderer->SetViewport(0, viewport);

void MyApp::DrawDebug(StringHash eventType, VariantMap& eventData)
{
    debugRenderer_->AddLine(Vector3(-10, -10, -100), Vector3(10, 10,100), Color(255,0,0), false);
}

But im not seeing anything. Am i missing a step or is my geometry simply not on screen?

Is the camera pointed at the line?

It turns out my camera was not pointing at the line, now it works fine, thanks