HeightFieldCache::HeightFieldCache(const MPTerrainEngineOptions& options) :
_cache ( true, 128 ),
_tileSize( options.tileSize().get() )
{
_useParentAsReferenceHF = (options.elevationSmoothing() == true);
_enabled = (::getenv("OSGEARTH_MEMORY_PROFILE") == 0L);
}
TileModelFactory::TileModelFactory(TileNodeRegistry* liveTiles,
const MPTerrainEngineOptions& terrainOptions,
TerrainEngineRequirements* terrainReqs) :
_liveTiles ( liveTiles ),
_terrainOptions( terrainOptions ),
_terrainReqs ( terrainReqs )
{
_meshHFCache = new HeightFieldCache(liveTiles, terrainOptions);
_meshHFCache->setTileSize( terrainOptions.tileSize().get() );
_normalHFCache = new HeightFieldCache(liveTiles, terrainOptions);
_normalHFCache->setTileSize( 257 );
_debug = terrainOptions.debug() == true;
}
void
SimpleOceanNode::rebuild()
{
this->removeChildren( 0, this->getNumChildren() );
if ( _parentMapNode.valid() )
{
const MapOptions& parentMapOptions = _parentMapNode->getMap()->getMapOptions();
const MapNodeOptions& parentMapNodeOptions = _parentMapNode->getMapNodeOptions();
// set up the map to "match" the parent map:
MapOptions mo;
mo.coordSysType() = parentMapOptions.coordSysType();
mo.profile() = _parentMapNode->getMap()->getProfile()->toProfileOptions();
// new data model for the ocean:
Map* oceanMap = new Map( mo );
// ditto with the map node options:
MapNodeOptions mno;
if ( mno.enableLighting().isSet() )
mno.enableLighting() = *mno.enableLighting();
MPTerrainEngineOptions mpoptions;
mpoptions.heightFieldSkirtRatio() = 0.0; // don't want to see skirts
mpoptions.minLOD() = _options.maxLOD().get(); // weird, I know
// so we can the surface from underwater:
mpoptions.clusterCulling() = false; // want to see underwater
mpoptions.enableBlending() = true; // gotsta blend with the main node
mpoptions.color() = _options.baseColor().get();
mno.setTerrainOptions( mpoptions );
// make the ocean's map node:
MapNode* oceanMapNode = new MapNode( oceanMap, mno );
// if the caller requested a mask layer, install that now.
if ( _options.maskLayer().isSet() )
{
if ( !_options.maskLayer()->maxLevel().isSet() )
{
// set the max subdivision level if it's not already specified in the
// mask layer options:
_options.maskLayer()->maxLevel() = *_options.maxLOD();
}
// make sure the mask is shared (so we can access it from our shader)
// and invisible (so we can't see it)
_options.maskLayer()->shared() = true;
_options.maskLayer()->visible() = false;
ImageLayer* maskLayer = new ImageLayer( "ocean-mask", *_options.maskLayer() );
oceanMap->addImageLayer( maskLayer );
}
// otherwise, install a "proxy layer" that will use the elevation data in the map
// to determine where the ocean is. This approach is limited in that it cannot
// detect the difference between ocean and inland areas that are below sea level.
else
{
// install an "elevation proxy" layer that reads elevation tiles from the
// parent map and turns them into encoded images for our shader to use.
ImageLayerOptions epo( "ocean-proxy" );
epo.cachePolicy() = CachePolicy::NO_CACHE;
//epo.maxLevel() = *_options.maxLOD();
oceanMap->addImageLayer( new ElevationProxyImageLayer(_parentMapNode->getMap(), epo) );
}
this->addChild( oceanMapNode );
// set up the shaders.
osg::StateSet* ss = this->getOrCreateStateSet();
// install the shaders on the ocean map node.
VirtualProgram* vp = VirtualProgram::getOrCreate( ss );
vp->setName( "osgEarth SimpleOcean" );
// use the appropriate shader for the active technique:
std::string vertSource = _options.maskLayer().isSet() ? source_vertMask : source_vertProxy;
std::string fragSource = _options.maskLayer().isSet() ? source_fragMask : source_fragProxy;
vp->setFunction( "oe_ocean_vertex", vertSource, ShaderComp::LOCATION_VERTEX_VIEW );
vp->setFunction( "oe_ocean_fragment", fragSource, ShaderComp::LOCATION_FRAGMENT_COLORING, 0.6f );
// install the slot attribute(s)
ss->getOrCreateUniform( "ocean_data", osg::Uniform::SAMPLER_2D )->set( 0 );
// set up the options uniforms.
_seaLevel = new osg::Uniform(osg::Uniform::FLOAT, "ocean_seaLevel");
ss->addUniform( _seaLevel.get() );
_lowFeather = new osg::Uniform(osg::Uniform::FLOAT, "ocean_lowFeather");
ss->addUniform( _lowFeather.get() );
_highFeather = new osg::Uniform(osg::Uniform::FLOAT, "ocean_highFeather");
ss->addUniform( _highFeather.get() );
_baseColor = new osg::Uniform(osg::Uniform::FLOAT_VEC4, "ocean_baseColor");
ss->addUniform( _baseColor.get() );
_maxRange = new osg::Uniform(osg::Uniform::FLOAT, "ocean_max_range");
ss->addUniform( _maxRange.get() );
_fadeRange = new osg::Uniform(osg::Uniform::FLOAT, "ocean_fade_range");
ss->addUniform( _fadeRange.get() );
// trick to mitigate z-fighting..
ss->setAttributeAndModes( new osg::Depth(osg::Depth::LEQUAL, 0.0, 1.0, false) );
ss->setRenderingHint( osg::StateSet::TRANSPARENT_BIN );
// load up a surface texture
osg::ref_ptr<osg::Image> surfaceImage;
ss->getOrCreateUniform( "ocean_has_surface_tex", osg::Uniform::BOOL )->set( false );
if ( _options.textureURI().isSet() )
{
//TODO: enable cache support here?
surfaceImage = _options.textureURI()->getImage();
}
if ( !surfaceImage.valid() )
{
surfaceImage = createSurfaceImage();
}
if ( surfaceImage.valid() )
{
osg::Texture2D* tex = new osg::Texture2D( surfaceImage.get() );
tex->setFilter( osg::Texture::MIN_FILTER, osg::Texture::LINEAR_MIPMAP_LINEAR );
tex->setFilter( osg::Texture::MAG_FILTER, osg::Texture::LINEAR );
tex->setWrap ( osg::Texture::WRAP_S, osg::Texture::REPEAT );
tex->setWrap ( osg::Texture::WRAP_T, osg::Texture::REPEAT );
ss->setTextureAttributeAndModes( 2, tex, 1 );
ss->getOrCreateUniform( "ocean_surface_tex", osg::Uniform::SAMPLER_2D )->set( 2 );
ss->getOrCreateUniform( "ocean_has_surface_tex", osg::Uniform::BOOL )->set( true );
}
// remove backface culling so we can see underwater
// (use OVERRIDE since the terrain engine sets back face culling.)
ss->setAttributeAndModes(
new osg::CullFace(),
osg::StateAttribute::OFF | osg::StateAttribute::OVERRIDE );
// Material.
osg::Material* m = new osg::Material();
m->setAmbient(m->FRONT_AND_BACK, osg::Vec4(0,0,0,1));
m->setDiffuse(m->FRONT_AND_BACK, osg::Vec4(1,1,1,1));
m->setSpecular(m->FRONT_AND_BACK, osg::Vec4(0.1,0.1,0.1,1));
m->setEmission(m->FRONT_AND_BACK, osg::Vec4(0,0,0,1));
m->setShininess(m->FRONT_AND_BACK, 32.0);
ss->setAttributeAndModes(m, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
// force apply options:
applyOptions();
}
}