Eegeo::v3 ComputeHeadingVector(Eegeo::dv3 interestPosition, float heading)
{
Eegeo::v3 interestForward(0,1,0);
Eegeo::dv3 interestEcefUp = interestPosition.Norm();
Eegeo::v3 interestUp = interestEcefUp.ToSingle();
Eegeo::v3 interestRight = Eegeo::v3::Cross(interestUp, interestForward);
interestRight = interestRight.Norm();
interestForward = Eegeo::v3::Cross(interestRight, interestUp);
interestForward = interestForward.Norm();
Eegeo::Quaternion rotation;
rotation.Set(interestUp, heading);
interestForward = rotation.RotatePoint(interestForward);
return interestForward;
}
void WorldPinsInFocusController::Update(float deltaSeconds, const Eegeo::dv3& ecefInterestPoint, const Eegeo::Camera::RenderCamera& renderCamera)
{
const IWorldPinsInFocusModel* pClosest = NULL;
double minDistanceSq = std::numeric_limits<double>::max();
Eegeo::v2 closestScreenPinLocation;
Eegeo::v2 screenInterestPoint = ProjectEcefToScreen(ecefInterestPoint, renderCamera);
if(m_focusEnabled)
{
for(size_t i = 0; i < m_worldPinsRepository.GetItemCount(); ++i)
{
ExampleApp::WorldPins::SdkModel::WorldPinItemModel* worldPinItemModel = m_worldPinsRepository.GetItemAtIndex(i);
if (!worldPinItemModel->IsFocusable())
{
continue;
}
Eegeo::dv3 ecefPinLocation;
Eegeo::v2 screenPinLocation;
m_worldPinsService.GetPinEcefAndScreenLocations(*worldPinItemModel,
ecefPinLocation,
screenPinLocation);
Eegeo::v3 cameraLocal = (ecefPinLocation - renderCamera.GetEcefLocation()).ToSingle();
Eegeo::v3 cameraSurfaceNormal = cameraLocal.Norm();
Eegeo::v3 upNormal = ecefPinLocation.Norm().ToSingle();
float dp = Eegeo::v3::Dot(cameraSurfaceNormal, upNormal);
if(dp > 0.0f)
{
continue;
}
screenPinLocation = ProjectEcefToScreen(ecefPinLocation, renderCamera);
double distanceToFocusSq = (screenInterestPoint - screenPinLocation).LengthSq();
if(distanceToFocusSq < minDistanceSq && worldPinItemModel->IsVisible())
{
pClosest = &worldPinItemModel->GetInFocusModel();
minDistanceSq = distanceToFocusSq;
closestScreenPinLocation = screenPinLocation;
}
}
}
if(m_pLastFocussedModel != pClosest)
{
m_pLastFocussedModel = pClosest;
if(m_pLastFocussedModel != NULL)
{
m_messageBus.Publish(WorldPinGainedFocusMessage(WorldPinsInFocusModel(m_pLastFocussedModel->GetPinId(),
m_pLastFocussedModel->GetTitle(),
m_pLastFocussedModel->GetSubtitle(),
m_pLastFocussedModel->GetVendor(),
m_pLastFocussedModel->GetJsonData(),
m_pLastFocussedModel->GetRatingsImage(),
m_pLastFocussedModel->GetReviewCount()),
closestScreenPinLocation));
}
else
{
m_messageBus.Publish(WorldPinLostFocusMessage());
}
}
else
{
if(m_pLastFocussedModel != NULL)
{
m_messageBus.Publish(WorldPinInFocusChangedLocationMessage(closestScreenPinLocation));
}
}
}