const bool Character::canSee( Entity* entity ) const
{
auto scene = Locator::getGraphics().getScene();
auto movable = entity->getMovable();
auto worldEye = getWorldEyePosition();
auto halfFov = Degree( mFieldOfView.valueDegrees() / 2.0f );
auto aabb = movable->getWorldAabbUpdated();
if ( aabb.distance( worldEye ) > mViewDistance )
return false;
auto samplingPoints = Math::aabbCorners( aabb );
for ( size_t i = 0; i < samplingPoints.size(); i++ )
{
auto sample = samplingPoints[i];
if ( sample.distance( worldEye ) <= mViewDistance )
{
sample -= worldEye;
if ( sample.angleBetween( mFacing ) <= halfFov )
{
Ogre::Ray ray( worldEye, sample );
auto query = scene->createRayQuery( ray );
// Mask out cameras, because 1) we don't care 2) their bounds will
// be out of date, causing an assertion failure
uint32_t mask = 0xFFFFFFFF;
mask &= ~SceneQueryFlag_Camera;
query->setQueryMask( mask );
query->setSortByDistance( true );
auto results = query->execute();
for ( auto result : results )
{
if ( !result.movable )
break;
auto flags = result.movable->getQueryFlags();
if ( ( flags & SceneQueryFlag_World ) != 0 )
break;
if ( result.movable->getId() == movable->getId() )
{
scene->destroyQuery( query );
return true;
}
}
scene->destroyQuery( query );
}
}
}
return false;
}
void GLES2HardwareOcclusionQuery::notifyOnContextLost()
{
destroyQuery();
}
/**
* Object destructor
*/
GLES2HardwareOcclusionQuery::~GLES2HardwareOcclusionQuery()
{
destroyQuery();
}
