本文整理汇总了C++中MapFrame::populateHeightField方法的典型用法代码示例。如果您正苦于以下问题：C++ MapFrame::populateHeightField方法的具体用法？C++ MapFrame::populateHeightField怎么用？C++ MapFrame::populateHeightField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MapFrame的用法示例。
在下文中一共展示了MapFrame::populateHeightField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:
bool
HeightFieldCache::getOrCreateHeightField(const MapFrame& frame,
const TileKey& key,
const osg::HeightField* parent_hf,
osg::ref_ptr<osg::HeightField>& out_hf,
bool& out_isFallback,
ElevationSamplePolicy samplePolicy,
ElevationInterpolation interp,
ProgressCallback* progress )
{
// default
out_isFallback = false;
// check the quick cache.
HFKey cachekey;
cachekey._key = key;
cachekey._revision = frame.getRevision();
cachekey._samplePolicy = samplePolicy;
if (progress)
progress->stats()["hfcache_try_count"] += 1;
LRUCache<HFKey,HFValue>::Record rec;
if ( _enabled && _cache.get(cachekey, rec) )
{
// Found it in the cache.
out_hf = rec.value()._hf.get();
out_isFallback = rec.value()._isFallback;
if (progress)
{
progress->stats()["hfcache_hit_count"] += 1;
progress->stats()["hfcache_hit_rate"] = progress->stats()["hfcache_hit_count"]/progress->stats()["hfcache_try_count"];
}
}
else
{
// Not in the cache, so we need to create a HF.
TileKey parentKey = key.createParentKey();
// Elevation "smoothing" uses the parent HF as the starting point for building
// a new tile. This will cause lower-resolution data to propagate down the tree
// and fill in any gaps in higher-resolution data. The result will be an elevation
// grid that is "smoother" but not necessarily as accurate.
if ( _useParentAsReferenceHF && parent_hf && parentKey.valid() )
{
out_hf = HeightFieldUtils::createSubSample(
parent_hf,
parentKey.getExtent(),
key.getExtent(),
interp );
}
// If we are not smoothing, or we have no parent data, start with a basic
// MSL=0 reference heightfield instead.
if ( !out_hf.valid() )
{
out_hf = HeightFieldUtils::createReferenceHeightField( key.getExtent(), _tileSize, _tileSize, 0u );
}
// Next, populate it with data from the Map. The map will overwrite our starting
// data with real data from the elevation stack.
bool populated = frame.populateHeightField(
out_hf,
key,
true, // convertToHAE
progress );
// Check for cancelation before writing to a cache
if (progress && progress->isCanceled())
{
if (out_hf.valid())
{
OE_DEBUG << LC << "Cancelation with a valid HF; this would cache bad data." << std::endl;
}
return false;
}
// If the map failed to provide any suitable data sources at all, replace the
// heightfield with data from its parent (if available).
if ( !populated )
{
if ( parentKey.valid() && parent_hf )
{
out_hf = HeightFieldUtils::createSubSample(
parent_hf,
parentKey.getExtent(),
key.getExtent(),
interp );
}
if ( !out_hf.valid() )
{
// NOTE: This is probably no longer be possible, but check anyway for completeness.
return false;
}
}
// ONLY cache the new heightfield if a parent HF existed. Otherwise the new HF
//.........这里部分代码省略.........