void
OceanSurfaceContainer::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();
QuadTreeTerrainEngineOptions to;
to.heightFieldSkirtRatio() = 0.0; // don't want to see skirts
to.clusterCulling() = false; // want to see underwater
to.enableBlending() = true; // gotsta blend with the main node
mno.setTerrainOptions( to );
// make the ocean's map node:
MapNode* oceanMapNode = new MapNode( oceanMap, mno );
// install a custom compositor. Must do this before adding any image layers.
oceanMapNode->setCompositorTechnique( new OceanCompositor() );
// 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 options uniforms.
osg::StateSet* ss = this->getOrCreateStateSet();
_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() );
// trick to prevent z-fighting..
ss->setAttributeAndModes( new osg::Depth(osg::Depth::LEQUAL, 0.0, 1.0, false) );
ss->setRenderBinDetails( 15, "RenderBin" );
// load up a surface texture
ss->getOrCreateUniform( "ocean_has_tex1", osg::Uniform::BOOL )->set( false );
if ( _options.textureURI().isSet() )
{
//TODO: enable cache support here:
osg::Image* image = _options.textureURI()->getImage();
if ( image )
{
osg::Texture2D* tex = new osg::Texture2D( image );
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( 1, tex, 1 );
ss->getOrCreateUniform( "ocean_tex1", osg::Uniform::SAMPLER_2D )->set( 1 );
ss->getOrCreateUniform( "ocean_has_tex1", 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 );
apply( _options );
}
}
