void
OSGTerrainEngineNode::updateTextureCombining()
{
if ( _texCompositor.valid() )
{
int numImageLayers = _update_mapf->imageLayers().size();
osg::StateSet* terrainStateSet = _terrain->getOrCreateStateSet();
if ( _texCompositor->usesShaderComposition() )
{
// Creates or updates the shader components that are generated by the texture compositor.
// These components reside in the CustomTerrain's stateset, and override the components
// installed in the VP on the engine-node's stateset in installShaders().
VirtualProgram* vp = new VirtualProgram() ;
vp->setName( "engine_osgterrain:TerrainNode" );
vp->installDefaultColoringShaders(numImageLayers);
terrainStateSet->setAttributeAndModes( vp, osg::StateAttribute::ON );
// first, update the default shader components based on the new layer count:
const ShaderFactory* sf = Registry::instance()->getShaderFactory();
// second, install the per-layer color filter functions.
for( int i=0; i<numImageLayers; ++i )
{
std::string layerFilterFunc = Stringify() << "osgearth_runColorFilters_" << i;
const ColorFilterChain& chain = _update_mapf->getImageLayerAt(i)->getColorFilters();
// install the wrapper function that calls all the filters in turn:
vp->setShader( layerFilterFunc, sf->createColorFilterChainFragmentShader(layerFilterFunc, chain) );
// install each of the filter entry points:
for( ColorFilterChain::const_iterator j = chain.begin(); j != chain.end(); ++j )
{
const ColorFilter* filter = j->get();
filter->install( terrainStateSet );
}
}
}
// next, inform the compositor that it needs to update based on a new layer count:
_texCompositor->updateMasterStateSet( terrainStateSet ); //, numImageLayers );
}
}
osg::Node*
ExtrudeGeometryFilter::push( FeatureList& input, FilterContext& context )
{
reset( context );
// minimally, we require an extrusion symbol.
if ( !_extrusionSymbol.valid() )
{
OE_WARN << LC << "Missing required extrusion symbolology; geometry will be empty" << std::endl;
return new osg::Group();
}
// establish the active resource library, if applicable.
_wallResLib = 0L;
_roofResLib = 0L;
const StyleSheet* sheet = context.getSession() ? context.getSession()->styles() : 0L;
if ( sheet != 0L )
{
if ( _wallSkinSymbol.valid() && _wallSkinSymbol->libraryName().isSet() )
{
_wallResLib = sheet->getResourceLibrary( *_wallSkinSymbol->libraryName() );
if ( !_wallResLib.valid() )
{
OE_WARN << LC << "Unable to load resource library '" << *_wallSkinSymbol->libraryName() << "'"
<< "; wall geometry will not be textured." << std::endl;
_wallSkinSymbol = 0L;
}
}
if ( _roofSkinSymbol.valid() && _roofSkinSymbol->libraryName().isSet() )
{
_roofResLib = sheet->getResourceLibrary( *_roofSkinSymbol->libraryName() );
if ( !_roofResLib.valid() )
{
OE_WARN << LC << "Unable to load resource library '" << *_roofSkinSymbol->libraryName() << "'"
<< "; roof geometry will not be textured." << std::endl;
_roofSkinSymbol = 0L;
}
}
}
// calculate the localization matrices (_local2world and _world2local)
computeLocalizers( context );
// push all the features through the extruder.
bool ok = process( input, context );
// convert everything to triangles and combine drawables.
if ( _mergeGeometry == true && _featureNameExpr.empty() )
{
for( SortedGeodeMap::iterator i = _geodes.begin(); i != _geodes.end(); ++i )
{
MeshConsolidator::run( *i->second.get() );
}
}
// parent geometry with a delocalizer (if necessary)
osg::Group* group = createDelocalizeGroup();
// combines geometries where the statesets are the same.
for( SortedGeodeMap::iterator i = _geodes.begin(); i != _geodes.end(); ++i )
{
group->addChild( i->second.get() );
}
_geodes.clear();
// if we drew outlines, apply a poly offset too.
if ( _outlineSymbol.valid() )
{
osg::StateSet* groupStateSet = group->getOrCreateStateSet();
groupStateSet->setAttributeAndModes( new osg::PolygonOffset(1,1), 1 );
if ( _outlineSymbol->stroke()->width().isSet() )
groupStateSet->setAttributeAndModes( new osg::LineWidth(*_outlineSymbol->stroke()->width()), 1 );
}
// if we have textures, install a shader to draw them
if ( _wallSkinSymbol.valid() || _roofSkinSymbol.valid() )
{
osg::StateSet* stateSet = group->getOrCreateStateSet();
VirtualProgram* vp = new VirtualProgram();
vp->setName("ExtrudeGeomFilter");
vp->installDefaultColoringShaders( 1 );
stateSet->setAttributeAndModes( vp, osg::StateAttribute::ON );
// a default empty texture will support any non-textured geometry
osg::Texture2D* tex = new osg::Texture2D( ImageUtils::createEmptyImage() );
tex->setUnRefImageDataAfterApply( false );
stateSet->setTextureAttributeAndModes(0, tex, osg::StateAttribute::ON);
stateSet->getOrCreateUniform("tex0", osg::Uniform::SAMPLER_2D)->set(0);
}
return group;
}
