C++ Node::asGroup方法代码示例

/// Returns true if the given node is a basic root group with no special information.
/// Used in conjunction with UseFbxRoot option.
/// Identity transforms are considered as basic root nodes.
bool isBasicRootNode(const osg::Node &node)
{
    const osg::Group *osgGroup = node.asGroup();

    if (!osgGroup || node.asGeode())        // WriterNodeVisitor handles Geodes the "old way" (= Derived from Node, not Group as for now). Geodes may be considered "basic root nodes" when WriterNodeVisitor will be adapted.
    {
        // Geodes & such are not basic root nodes
        return false;
    }

    // Test if we've got an empty transform (= a group!)
    const osg::Transform *transform = osgGroup->asTransform();
    if (transform)
    {
        if (const osg::MatrixTransform *matrixTransform = transform->asMatrixTransform())
        {
            if (!matrixTransform->getMatrix().isIdentity())
            {
                // Non-identity matrix transform
                return false;
            }
        }
        else if (const osg::PositionAttitudeTransform *pat = transform->asPositionAttitudeTransform())
        {
            if (pat->getPosition() != osg::Vec3d() ||
                pat->getAttitude() != osg::Quat() ||
                pat->getScale() != osg::Vec3d(1.0f, 1.0f, 1.0f) ||
                pat->getPivotPoint() != osg::Vec3d())
            {
                // Non-identity position attribute transform
                return false;
            }
        }
        else
        {
            // Other transform (not identity or not predefined type)
            return false;
        }
    }

    // Test the presence of a non-empty stateset
    if (node.getStateSet())
    {
        osg::ref_ptr<osg::StateSet> emptyStateSet = new osg::StateSet;
        if (node.getStateSet()->compare(*emptyStateSet, true) != 0)
        {
            return false;
        }
    }

    return true;
}

void FindGroupByRecIndex::apply(osg::Node &searchNode)
{
    if (searchNode.getUserDataContainer() && searchNode.getUserDataContainer()->getNumUserObjects())
    {
        NodeUserData* holder = dynamic_cast<NodeUserData*>(searchNode.getUserDataContainer()->getUserObject(0));
        if (holder && holder->mIndex == mRecIndex)
        {
            osg::Group* group = searchNode.asGroup();
            if (!group)
                group = searchNode.getParent(0);

            mFound = group;
            mFoundPath = getNodePath();
            return;
        }
    }
    traverse(searchNode);
}

osgDB::ReaderWriter::WriteResult ReaderWriterFBX::writeNode(
    const osg::Node& node,
    const std::string& filename,
    const Options* options) const
{
    try
    {
        std::string ext = osgDB::getLowerCaseFileExtension(filename);
        if (!acceptsExtension(ext)) return WriteResult::FILE_NOT_HANDLED;

        osg::ref_ptr<Options> localOptions = options ?
            static_cast<Options*>(options->clone(osg::CopyOp::SHALLOW_COPY)) : new Options;
        localOptions->getDatabasePathList().push_front(osgDB::getFilePath(filename));

        KFbxSdkManager* pSdkManager = KFbxSdkManager::Create();

        if (!pSdkManager)
        {
            return WriteResult::ERROR_IN_WRITING_FILE;
        }

        CleanUpFbx cleanUpFbx(pSdkManager);

        pSdkManager->SetIOSettings(KFbxIOSettings::Create(pSdkManager, IOSROOT));

        bool useFbxRoot = false;
        if (options)
        {
            std::istringstream iss(options->getOptionString());
            std::string opt;
            while (iss >> opt)
            {
                if (opt == "Embedded")
                {
                    pSdkManager->GetIOSettings()->SetBoolProp(EXP_FBX_EMBEDDED, true);
                }
                else if (opt == "UseFbxRoot")
                {
                    useFbxRoot = true;
                }
            }
        }

        KFbxScene* pScene = KFbxScene::Create(pSdkManager, "");
        pluginfbx::WriterNodeVisitor writerNodeVisitor(pScene, pSdkManager, filename,
            options, osgDB::getFilePath(node.getName().empty() ? filename : node.getName()));
        if (useFbxRoot && isBasicRootNode(node))
        {
            // If root node is a simple group, put all elements under the FBX root
            const osg::Group * osgGroup = node.asGroup();
            for(unsigned int child=0; child<osgGroup->getNumChildren(); ++child) {
                const_cast<osg::Node *>(osgGroup->getChild(child))->accept(writerNodeVisitor);
            }
        }
        else {
            // Normal scene
            const_cast<osg::Node&>(node).accept(writerNodeVisitor);
        }

        KFbxExporter* lExporter = KFbxExporter::Create(pSdkManager, "");
        pScene->GetGlobalSettings().SetAxisSystem(KFbxAxisSystem::eOpenGL);

        // Ensure the directory exists or else the FBX SDK will fail
        if (!osgDB::makeDirectoryForFile(filename)) {
            OSG_NOTICE << "Can't create directory for file '" << filename << "'. FBX SDK may fail creating the file." << std::endl;
        }

        // The FBX SDK interprets the filename as UTF-8
#ifdef OSG_USE_UTF8_FILENAME
        const std::string& utf8filename(filename);
#else
        std::string utf8filename(osgDB::convertStringFromCurrentCodePageToUTF8(filename));
#endif

        if (!lExporter->Initialize(utf8filename.c_str()))
        {
            return std::string(lExporter->GetLastErrorString());
        }
        if (!lExporter->Export(pScene))
        {
            return std::string(lExporter->GetLastErrorString());
        }

        return WriteResult::FILE_SAVED;
    }
    catch (const std::string& s)
    {
        return s;
    }
    catch (const char* s)
    {
        return std::string(s);
    }
    catch (...)
    {
    }

    return WriteResult::ERROR_IN_WRITING_FILE;
}

osgDB::ReaderWriter::WriteResult ReaderWriterFBX::writeNode(
    const osg::Node& node,
    const std::string& filename,
    const Options* options) const
{
    try
    {
        std::string ext = osgDB::getLowerCaseFileExtension(filename);
        if (!acceptsExtension(ext)) return WriteResult::FILE_NOT_HANDLED;

        osg::ref_ptr<Options> localOptions = options ?
            static_cast<Options*>(options->clone(osg::CopyOp::SHALLOW_COPY)) : new Options;
        localOptions->getDatabasePathList().push_front(osgDB::getFilePath(filename));

        FbxManager* pSdkManager = FbxManager::Create();

        if (!pSdkManager)
        {
            return WriteResult::ERROR_IN_WRITING_FILE;
        }

        CleanUpFbx cleanUpFbx(pSdkManager);

        pSdkManager->SetIOSettings(FbxIOSettings::Create(pSdkManager, IOSROOT));

        bool useFbxRoot = false;
        bool ascii(false);
        std::string exportVersion;
        if (options)
        {
            std::istringstream iss(options->getOptionString());
            std::string opt;
            while (iss >> opt)
            {
                if (opt == "Embedded")
                {
                    pSdkManager->GetIOSettings()->SetBoolProp(EXP_FBX_EMBEDDED, true);
                }
                else if (opt == "UseFbxRoot")
                {
                    useFbxRoot = true;
                }
                else if (opt == "FBX-ASCII")
                {
                    ascii = true;
                }
                else if (opt == "FBX-ExportVersion")
                {
                    iss >> exportVersion;
                }
            }
        }

        FbxScene* pScene = FbxScene::Create(pSdkManager, "");

        if (options)
        {
            if (options->getPluginData("FBX-AssetUnitMeter"))
            {
                float unit = *static_cast<const float*>(options->getPluginData("FBX-AssetUnitMeter"));
                FbxSystemUnit kFbxSystemUnit(unit*100);
                pScene->GetGlobalSettings().SetSystemUnit(kFbxSystemUnit);
            }
        }

        pluginfbx::WriterNodeVisitor writerNodeVisitor(pScene, pSdkManager, filename,
            options, osgDB::getFilePath(node.getName().empty() ? filename : node.getName()));
        if (useFbxRoot && isBasicRootNode(node))
        {
            // If root node is a simple group, put all elements under the FBX root
            const osg::Group * osgGroup = node.asGroup();
            for (unsigned int child = 0; child < osgGroup->getNumChildren(); ++child)
            {
                const_cast<osg::Node *>(osgGroup->getChild(child))->accept(writerNodeVisitor);
            }
        }
        else {
            // Normal scene
            const_cast<osg::Node&>(node).accept(writerNodeVisitor);
        }

        FbxDocumentInfo* pDocInfo = pScene->GetDocumentInfo();
        bool needNewDocInfo = pDocInfo != NULL;
        if (needNewDocInfo)
        {
            pDocInfo = FbxDocumentInfo::Create(pSdkManager, "");
        }
        pDocInfo->LastSaved_ApplicationName.Set(FbxString("OpenSceneGraph"));
        pDocInfo->LastSaved_ApplicationVersion.Set(FbxString(osgGetVersion()));
        if (needNewDocInfo)
        {
            pScene->SetDocumentInfo(pDocInfo);
        }

        FbxExporter* lExporter = FbxExporter::Create(pSdkManager, "");
        pScene->GetGlobalSettings().SetAxisSystem(FbxAxisSystem::eOpenGL);

        // Ensure the directory exists or else the FBX SDK will fail
        if (!osgDB::makeDirectoryForFile(filename)) {
            OSG_NOTICE << "Can't create directory for file '" << filename << "'. FBX SDK may fail creating the file." << std::endl;
//.........这里部分代码省略.........