C++ Node::getCullCallback方法代码示例

void 
ProxyCullVisitor::handle_cull_callbacks_and_traverse(osg::Node& node)
{
#if OSG_VERSION_GREATER_THAN(3,3,1)
    osg::Callback* callback = node.getCullCallback();
    if (callback) callback->run(&node, this);
    else traverse(node);
#else
    osg::NodeCallback* callback = node.getCullCallback();
    if (callback) (*callback)(&node,this);
    else traverse(node);
#endif
}

bool PosterIntersector::enter( const osg::Node& node )
{
    if ( !node.isCullingActive() ) return true;
    if ( _polytope.contains(node.getBound()) )
    {
        if ( node.getCullCallback() )
        {
            const osg::ClusterCullingCallback* cccb =
                dynamic_cast<const osg::ClusterCullingCallback*>( node.getCullCallback() );
            if ( cccb && cccb->cull(_intersectionVisitor, 0, NULL) ) return false;
        }
        return true;
    }
    return false;
}

void 
ProxyCullVisitor::handle_cull_callbacks_and_traverse(osg::Node& node)
{
    osg::NodeCallback* callback = node.getCullCallback();
    if (callback) (*callback)(&node,this);
    else traverse(node);
}

void RemoveQueries::apply( osg::Node& node )
{
    QueryCullCallback* qcc = dynamic_cast< QueryCullCallback* >(
        node.getCullCallback() );

    if( qcc != NULL )
        node.setCullCallback( NULL );

    traverse( node );
}

//.........这里部分代码省略.........
            {
                PatchLayer* layer = i->get();
                if (layer->getAcceptCallback() == 0L ||
                    layer->getAcceptCallback()->acceptKey(_currentTileNode->getKey()))
                {
                    // Push this tile's matrix if we haven't already done so:
                    if (!pushedMatrix)
                    {
                        SurfaceNode* surface = tileNode->getSurfaceNode();

                        // push the surface matrix:
                        osg::Matrix mvm = *getModelViewMatrix();
                        surface->computeLocalToWorldMatrix(mvm, this);
                        pushModelViewMatrix(createOrReuseMatrix(mvm), surface->getReferenceFrame());
                        pushedMatrix = true;
                    }

                    // Add the draw command:
                    DrawTileCommand* cmd = addDrawCommand(layer->getUID(), &renderModel, 0L, tileNode);
                    if (cmd)
                    {
                        cmd->_drawPatch = true;
                        cmd->_drawCallback = layer->getDrawCallback();
                    }
                }
            }

            if (pushedMatrix)
            {
                popModelViewMatrix();
            }
        }
    }

    else
    {
        SurfaceNode* surface = dynamic_cast<SurfaceNode*>(&node);
        if (surface)
        {
            TileRenderModel& renderModel = _currentTileNode->renderModel();

            // push the surface matrix:
            osg::Matrix mvm = *getModelViewMatrix();
            surface->computeLocalToWorldMatrix(mvm, this);
            pushModelViewMatrix(createOrReuseMatrix(mvm), surface->getReferenceFrame());

            int order = 0;

            // First go through any legit rendering pass data in the Tile and
            // and add a DrawCommand for each.
            for (unsigned p = 0; p < renderModel._passes.size(); ++p)
            {
                const RenderingPass& pass = renderModel._passes[p];
                DrawTileCommand* cmd = addDrawCommand(pass.sourceUID(), &renderModel, &pass, _currentTileNode);
                if (cmd)
                {
                    if (_firstTileDrawCommandForTile == 0L)
                    {
                        _firstTileDrawCommandForTile = cmd;
                    }
                    else if (cmd->_order < _firstTileDrawCommandForTile->_order)
                    {
                        //_firstTileDrawCommandForTile->_order = 1;
                        _firstTileDrawCommandForTile = cmd;
                    }
                }
            }

            // If the culler added no draw commands for this tile... we still need
            // to draw something or else there will be a hole! So draw a blank tile.
            // UID = -1 is the special UID code for a blank.
            if (_firstTileDrawCommandForTile == 0L)
            {
                //OE_INFO << LC << "Adding blank render for tile " << _currentTileNode->getKey().str() << std::endl;
                DrawTileCommand* cmd = addDrawCommand(-1, &renderModel, 0L, _currentTileNode);
                if (cmd)
                    cmd->_order = 0;
            }

            // Set the layer order of the first draw command for this tile to zero,
            // to support proper terrain blending.
            if (_firstTileDrawCommandForTile)
            {
                _firstTileDrawCommandForTile->_order = 0;
            }
                
            // pop the matrix from the cull stack
            popModelViewMatrix();

            // update our bounds
            _terrain._drawState->_bs.expandBy(surface->getBound());
            _terrain._drawState->_box.expandBy(_terrain._drawState->_bs);
        }
    }

    // Handle any CullCallbacks and traverse.
    osg::Callback* cullCallback = node.getCullCallback();
    if (cullCallback) cullCallback->run(&node, this);
    else traverse(node);
}