void
TileModelFactory::buildElevation(const TileKey& key,
const MapFrame& frame,
bool accumulate,
TileModel* model,
ProgressCallback* progress)
{
const MapInfo& mapInfo = frame.getMapInfo();
const osgEarth::ElevationInterpolation& interp =
frame.getMapOptions().elevationInterpolation().get();
// Request a heightfield from the map, falling back on lower resolution tiles
// if necessary (fallback=true)
osg::ref_ptr<osg::HeightField> hf;
bool isFallback = false;
if (_hfCache->getOrCreateHeightField(frame, key, accumulate, hf, isFallback, SAMPLE_FIRST_VALID, interp, progress))
{
model->_elevationData = TileModel::ElevationData(
hf,
GeoLocator::createForKey( key, mapInfo ),
isFallback );
// Edge normalization: requires adjacency information
if ( _terrainOptions.normalizeEdges() == true )
{
for( int x=-1; x<=1; x++ )
{
for( int y=-1; y<=1; y++ )
{
if ( x != 0 || y != 0 )
{
TileKey nk = key.createNeighborKey(x, y);
if ( nk.valid() )
{
osg::ref_ptr<osg::HeightField> hf;
if (_hfCache->getOrCreateHeightField(frame, nk, accumulate, hf, isFallback, SAMPLE_FIRST_VALID, interp, progress) )
{
model->_elevationData.setNeighbor( x, y, hf.get() );
}
}
}
}
}
// parent too.
if ( key.getLOD() > 0 )
{
osg::ref_ptr<osg::HeightField> hf;
if ( _hfCache->getOrCreateHeightField(frame, key.createParentKey(), accumulate, hf, isFallback, SAMPLE_FIRST_VALID, interp, progress) )
{
model->_elevationData.setParent( hf.get() );
}
}
}
}
}
void
TileModelFactory::buildNormalMap(const TileKey& key,
const MapFrame& frame,
bool accumulate,
TileModel* model,
ProgressCallback* progress)
{
const MapInfo& mapInfo = frame.getMapInfo();
const osgEarth::ElevationInterpolation& interp =
frame.getMapOptions().elevationInterpolation().get();
// Request a heightfield from the map, falling back on lower resolution tiles
// if necessary (fallback=true)
osg::ref_ptr<osg::HeightField> hf;
osg::ref_ptr<osg::HeightField> parentHF;
osg::ref_ptr<const TileModel> parentModel;
bool isFallback = false;
unsigned minNormalLOD =
_terrainOptions.minNormalMapLOD().isSet() ?
_terrainOptions.minNormalMapLOD().get() : 0u;
if ( key.getLOD() >= minNormalLOD )
{
// look up the parent's heightfield to use as a template
TileKey parentKey = key.createParentKey();
if ( accumulate )
{
osg::ref_ptr<TileNode> parentNode;
if (_liveTiles->get(parentKey, parentNode))
{
parentModel = parentNode->getTileModel();
parentHF = parentModel->_normalData.getHeightField();
if ( parentHF->getNumColumns() == EMPTY_NORMAL_MAP_SIZE )
parentHF = 0L;
}
}
// Make a new heightfield:
if (_normalHFCache->getOrCreateHeightField(frame, key, parentHF.get(), hf, isFallback, SAMPLE_FIRST_VALID, interp, progress))
{
if ( isFallback && parentModel.valid() )
{
model->_normalData = parentModel->_normalData;
model->_normalData._fallbackData = true;
}
else
{
model->_normalData = TileModel::NormalData(
hf,
GeoLocator::createForKey( key, mapInfo ),
isFallback );
}
}
}
else
{
// empty HF must be at least 2x2 for normal texture gen to work
hf = HeightFieldUtils::createReferenceHeightField(
key.getExtent(), EMPTY_NORMAL_MAP_SIZE, EMPTY_NORMAL_MAP_SIZE, true );
model->_normalData = TileModel::NormalData(
hf,
GeoLocator::createForKey( key, mapInfo ),
false );
}
if ( isFallback && parentModel.valid() )
{
model->_normalTexture = parentModel->_normalTexture.get();
}
else
{
model->generateNormalTexture();
}
}
void
TileModelFactory::buildElevation(const TileKey& key,
const MapFrame& frame,
bool accumulate,
bool buildTexture,
TileModel* model,
ProgressCallback* progress)
{
const MapInfo& mapInfo = frame.getMapInfo();
const osgEarth::ElevationInterpolation& interp =
frame.getMapOptions().elevationInterpolation().get();
// Request a heightfield from the map, falling back on lower resolution tiles
// if necessary (fallback=true)
osg::ref_ptr<osg::HeightField> hf;
bool isFallback = false;
// look up the parent's heightfield to use as a template
osg::ref_ptr<osg::HeightField> parentHF;
TileKey parentKey = key.createParentKey();
if ( accumulate )
{
osg::ref_ptr<TileNode> parentNode;
if (_liveTiles->get(parentKey, parentNode))
{
parentHF = parentNode->getTileModel()->_elevationData.getHeightField();
if ( _debug && key.getLOD() > 0 && !parentHF.valid() )
{
OE_NOTICE << LC << "Could not find a parent tile HF for " << key.str() << "\n";
}
}
}
// Make a new heightfield:
if (_meshHFCache->getOrCreateHeightField(frame, key, parentHF.get(), hf, isFallback, SAMPLE_FIRST_VALID, interp, progress))
{
model->_elevationData = TileModel::ElevationData(
hf,
GeoLocator::createForKey( key, mapInfo ),
isFallback );
// Edge normalization: requires adjacency information
if ( _terrainOptions.normalizeEdges() == true )
{
for( int x=-1; x<=1; x++ )
{
for( int y=-1; y<=1; y++ )
{
if ( x != 0 || y != 0 )
{
TileKey neighborKey = key.createNeighborKey(x, y);
if ( neighborKey.valid() )
{
osg::ref_ptr<osg::HeightField> neighborParentHF;
if ( accumulate )
{
TileKey neighborParentKey = neighborKey.createParentKey();
if (neighborParentKey == parentKey)
{
neighborParentHF = parentHF;
}
else
{
osg::ref_ptr<TileNode> neighborParentNode;
if (_liveTiles->get(neighborParentKey, neighborParentNode))
{
neighborParentHF = neighborParentNode->getTileModel()->_elevationData.getHeightField();
}
}
}
// only pull the tile if we have a valid parent HF for it -- otherwise
// you might get a flat tile when upsampling data.
if ( neighborParentHF.valid() )
{
osg::ref_ptr<osg::HeightField> hf;
if (_meshHFCache->getOrCreateHeightField(frame, neighborKey, neighborParentHF.get(), hf, isFallback, SAMPLE_FIRST_VALID, interp, progress) )
{
model->_elevationData.setNeighbor( x, y, hf.get() );
}
}
}
}
}
}
// parent too.
if ( parentHF.valid() )
{
model->_elevationData.setParent( parentHF.get() );
}
}
if ( buildTexture )
{
model->generateElevationTexture();
}
}
}