本文整理汇总了C++中EngineContext::landCoverBins方法的典型用法代码示例。如果您正苦于以下问题：C++ EngineContext::landCoverBins方法的具体用法？C++ EngineContext::landCoverBins怎么用？C++ EngineContext::landCoverBins使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类EngineContext的用法示例。
在下文中一共展示了EngineContext::landCoverBins方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: cull
void TileNode::cull(osg::NodeVisitor& nv)
{
if ( nv.getFrameStamp() )
{
_lastTraversalFrame.exchange( nv.getFrameStamp()->getFrameNumber() );
}
unsigned currLOD = getTileKey().getLOD();
#if OSGEARTH_REX_TILE_NODE_DEBUG_TRAVERSAL
if (currLOD==0)
{
OE_INFO << LC <<"Traversing: "<<"\n";
}
#endif
osgUtil::CullVisitor* cv = dynamic_cast<osgUtil::CullVisitor*>( &nv );
EngineContext* context = static_cast<EngineContext*>( nv.getUserData() );
const SelectionInfo& selectionInfo = context->getSelectionInfo();
// determine whether we can and should subdivide to a higher resolution:
bool subdivide = shouldSubDivide(nv, selectionInfo, cv->getLODScale());
// If this is an inherit-viewpoint camera, we don't need it to invoke subdivision
// because we want only the tiles loaded by the true viewpoint.
bool canCreateChildren = subdivide;
const osg::Camera* cam = cv->getCurrentCamera();
if ( cam && cam->getReferenceFrame() == osg::Camera::ABSOLUTE_RF_INHERIT_VIEWPOINT )
{
canCreateChildren = false;
}
// If *any* of the children are visible, subdivide.
if (subdivide)
{
// We are in range of the child nodes. Either draw them or load them.
// If the children don't exist, create them and inherit the parent's data.
if ( getNumChildren() == 0 && canCreateChildren )
{
Threading::ScopedMutexLock exclusive(_mutex);
if ( getNumChildren() == 0 )
{
createChildren( context );
}
}
// All 4 children must be ready before we can traverse any of them:
unsigned numChildrenReady = 0;
if ( getNumChildren() == 4 )
{
for(unsigned i = 0; i < 4; ++i)
{
if ( getSubTile(i)->isReadyToTraverse() )
{
++numChildrenReady;
}
}
}
// If all are ready, traverse them now.
if ( numChildrenReady == 4 )
{
// TODO:
// When we do this, we need to quite sure that all 4 children will be accepted into
// the draw set. Perhaps isReadyToTraverse() needs to check that.
_children[0]->accept( nv );
_children[1]->accept( nv );
_children[2]->accept( nv );
_children[3]->accept( nv );
}
// If we don't traverse the children, traverse this node's payload.
else if ( _surface.valid() )
{
cullSurface( cv );
}
}
// If children are outside camera range, draw the payload and expire the children.
else if ( _surface.valid() )
{
cullSurface( cv );
if ( getNumChildren() >= 4 && context->maxLiveTilesExceeded() )
{
if (getSubTile(0)->isDormant( nv ) &&
getSubTile(1)->isDormant( nv ) &&
getSubTile(2)->isDormant( nv ) &&
getSubTile(3)->isDormant( nv ))
{
expireChildren( nv );
}
}
}
// Traverse land cover bins at this LOD.
for(int i=0; i<context->landCoverBins()->size(); ++i)
{
bool first = true;
//.........这里部分代码省略.........