C++ IObject::getNumChildren方法代码示例

void recursivelyReadChildren( IObject& parent )
{
    unsigned int numChildren = parent.getNumChildren();
    std::cout << " has " << numChildren << " children"
              << std::endl;

    for (unsigned int ii=0; ii<numChildren; ii++)
    {
        IObject child = parent.getChild(ii);
        std::cout << "  " << child.getName();

        unsigned int expectedChildren = 2;
        if (child.getName().substr(6,1) == "2")
            // bottom of the hierarchy
            expectedChildren = 0;

        unsigned int children = child.getNumChildren();
        ABCA_ASSERT( children == expectedChildren,
                     "Expected " << expectedChildren << " children " <<
                     "but found " << children );

        recursivelyReadChildren( child );
    }

    return;
}

//-*****************************************************************************
void layerTest()
{
    std::string fileName = "objectLayer1.abc";
    std::string fileName2 = "objectLayer2.abc";
    {
        OArchive archive( Alembic::AbcCoreOgawa::WriteArchive(), fileName );
        OObject child( archive.getTop(), "child" );
        OObject childCool( child, "cool" );
        OObject childGuy( child, "guy" );

        OObject childA( archive.getTop(), "childA" );
        OObject childAA( childA, "A" );
    }

    {
        OArchive archive( Alembic::AbcCoreOgawa::WriteArchive(), fileName2 );
        OObject child( archive.getTop(), "child" );
        OObject childCool( child, "cool" );
        OObject childGal( child, "gal" );

        OObject childA( archive.getTop(), "childB" );
        OObject childAA( childA, "B" );
    }

    {
        std::vector< std::string > files;
        files.push_back( fileName );
        files.push_back( fileName2 );

        Alembic::AbcCoreFactory::IFactory factory;
        IArchive archive = factory.getArchive( files );

        // child, childA, childB
        TESTING_ASSERT( archive.getTop().getNumChildren() == 3 );

        IObject child = archive.getTop().getChild("child");
        TESTING_ASSERT( child.getNumChildren() == 3 );
        TESTING_ASSERT( child.getChild("cool").valid() );
        TESTING_ASSERT( child.getChild("cool").getNumChildren() == 0 );
        TESTING_ASSERT( child.getChild("guy").valid() );
        TESTING_ASSERT( child.getChild("guy").getNumChildren() == 0 );
        TESTING_ASSERT( child.getChild("gal").valid() );
        TESTING_ASSERT( child.getChild("gal").getNumChildren() == 0 );

        IObject childA = archive.getTop().getChild("childA");
        TESTING_ASSERT( childA.getNumChildren() == 1 );
        TESTING_ASSERT( childA.getChild("A").valid() );
        TESTING_ASSERT( childA.getChild("A").getNumChildren() == 0 );

        IObject childB = archive.getTop().getChild("childB");
        TESTING_ASSERT( childB.getNumChildren() == 1 );
        TESTING_ASSERT( childB.getChild("B").valid() );
        TESTING_ASSERT( childB.getChild("B").getNumChildren() == 0 );
    }
}

//-*****************************************************************************
void pruneTest()
{
    std::string fileName = "objectPrune1.abc";
    std::string fileName2 = "objectPrune2.abc";
    {
        OArchive archive( Alembic::AbcCoreOgawa::WriteArchive(), fileName );
        OObject child( archive.getTop(), "child" );
        OObject childCool( child, "cool" );
        OObject childGuy( child, "guy" );

        OObject childA( archive.getTop(), "childA" );
        OObject childAA( childA, "A" );

        OObject childB( archive.getTop(), "childB" );
        OObject childBB( childB, "B" );
    }

    {
        MetaData md;
        Alembic::AbcCoreLayer::SetPrune( md, true );

        OArchive archive( Alembic::AbcCoreOgawa::WriteArchive(), fileName2 );
        OObject child( archive.getTop(), "child" );
        OObject childGuy( child, "guy", md );

        OObject childA( archive.getTop(), "childA" );
        OObject childAA( childA, "A", md );
        OObject childAB( childA, "B", md );

        OObject childB( archive.getTop(), "childB", md );
    }

    {
        std::vector< std::string > files;
        files.push_back( fileName );
        files.push_back( fileName2 );

        Alembic::AbcCoreFactory::IFactory factory;
        IArchive archive = factory.getArchive( files );

        // child, childA, childB
        TESTING_ASSERT( archive.getTop().getNumChildren() == 2 );

        IObject child = archive.getTop().getChild("child");
        TESTING_ASSERT( child.getNumChildren() == 1 );
        TESTING_ASSERT( child.getChild("cool").valid() );
        TESTING_ASSERT( child.getChild("cool").getNumChildren() == 0 );

        IObject childA = archive.getTop().getChild("childA");
        TESTING_ASSERT( childA.getNumChildren() == 0 );
    }
}

void readFlatHierarchy(const std::string &archiveName)
{
    // Open an existing archive for reading. Indicate that we want
    //   Alembic to throw exceptions on errors.
    IArchive archive( Alembic::AbcCoreHDF5::ReadArchive(),
                      archiveName, ErrorHandler::kThrowPolicy );
    IObject archiveTop = archive.getTop();

    // Determine the number of (top level) children the archive has
    const int numChildren = archiveTop.getNumChildren();
    ABCA_ASSERT( numChildren == 10,
                 "Expected 10 children, found " << numChildren );

    std::cout << "The archive has " << numChildren << " children:"
              << std::endl;

    // Iterate through them, print out their names
    for (int ii=0; ii<numChildren; ii++)
    {
        IObject child( archiveTop,
                       archiveTop.getChildHeader(ii).getName() );
        std::cout << "  " << child.getName();

        const unsigned int children = child.getNumChildren();
        std::cout << " has " << children << " children"
                  << std::endl;
        
        ABCA_ASSERT( children == 0,
                     "Expected no children, found " << children );

    }

    // Done - the archive closes itself
}

void readDeepHierarchy(const std::string &archiveName)
{
    // Open an existing archive for reading. Indicate that we want
    //   Alembic to throw exceptions on errors.
    AbcF::IFactory factory;
    factory.setPolicy(  ErrorHandler::kThrowPolicy );
    AbcF::IFactory::CoreType coreType;
    IArchive archive = factory.getArchive(archiveName, coreType);
    IObject archiveTop = archive.getTop();

    // Determine the number of (top level) children the archive has
    const unsigned int numChildren = archiveTop.getNumChildren();
    std::cout << "The archive has " << numChildren << " children:"
              << std::endl;

    ABCA_ASSERT( numChildren == 2,
                 "Expected 2 children, found " << numChildren );

    // Iterate through them, print out their names
    for (unsigned int ii=0; ii<numChildren; ii++)
    {
        IObject child( archiveTop, archiveTop.getChildHeader(ii).getName() );
        std::cout << "  " << child.getName();

        recursivelyReadChildren( child );
    }


    // do it again to make sure we clean up after ourselves properly
    IArchive archive2 = factory.getArchive(archiveName, coreType);
    IObject archiveTop2 = archive2.getTop();


    // Done - the archive closes itself
}

void readEmptyCompoundProperties(const std::string &archiveName)
{
    // Open an existing archive for reading. Indicate that we want
    //   Alembic to throw exceptions on errors.
    AbcF::IFactory factory;
    factory.setPolicy(  ErrorHandler::kThrowPolicy );
    AbcF::IFactory::CoreType coreType;
    IArchive archive = factory.getArchive(archiveName, coreType);
    IObject archiveTop = archive.getTop();

    // Determine the number of (top level) children the archive has
    const int numChildren = archiveTop.getNumChildren();
    ABCA_ASSERT( numChildren == 2, "Wrong number of children (expected 2)");
    std::cout << "The archive has " << numChildren << " children:"
              << std::endl;

    // Iterate through them, print out their names
    for (int ii=0; ii<numChildren; ii++)
    {
        IObject child( archiveTop, archiveTop.getChildHeader(ii).getName() );
        std::cout << "  " << child.getName();

        std::cout << " has " << child.getNumChildren() << " children"
                  << std::endl;

        // Properties
        ICompoundProperty props = child.getProperties();
        int numProperties = props.getNumProperties();

        std::cout << "  ..and " << numProperties << " properties"
                  << std::endl;

        std::vector<std::string> propNames;
        for (int pp=0; pp<numProperties; pp++)
            propNames.push_back( props.getPropertyHeader(pp).getName() );

        for (int jj=0; jj<numProperties; jj++)
        {
            std::cout << "    ..named " << propNames[jj] << std::endl;

            std::cout << "    ..with type: ";
            PropertyType pType = props.getPropertyHeader(jj).getPropertyType();
            if (pType == kCompoundProperty)
            {
                std::cout << "compound" << std::endl;
            }
            else if (pType == kScalarProperty)
            {
                std::cout << "scalar" << std::endl;
            }
            else if (pType == kArrayProperty)
            {
                std::cout << "array" << std::endl;
            }
        }
    }

    // Done - the archive closes itself

}

void getObjectTimeSpan(IObject obj, chrono_t& first, chrono_t& last, bool doChildren)
{
	if ( Alembic::AbcGeom::IPolyMesh::matches(obj.getHeader()) ) {
		IPolyMesh iPoly(obj, Alembic::Abc::kWrapExisting);
		getPolyMeshTimeSpan(iPoly, first, last);
	}

	else if ( Alembic::AbcGeom::ISubD::matches(obj.getHeader()) ) {
		ISubD iSub(obj, Alembic::Abc::kWrapExisting);
		getSubDTimeSpan(iSub, first, last);
	}

	else if ( Alembic::AbcGeom::IXform::matches(obj.getHeader()) ) {
		IXform iXf(obj, Alembic::Abc::kWrapExisting);
		getXformTimeSpan(iXf, first, last, false);
	}

	else if ( Alembic::AbcGeom::ICamera::matches(obj.getHeader()) ) {
		ICamera iCam(obj, Alembic::Abc::kWrapExisting);
		getCameraTimeSpan(iCam, first, last);
	}

	if (doChildren) {
		// do this object's children too
		for (unsigned i=0; i < obj.getNumChildren(); ++i)
		{
			IObject child( obj.getChild( i ));
			getObjectTimeSpan(child, first, last, doChildren);
		}
	}
}

//-*****************************************************************************
void getABCTimeSpan(IArchive archive, chrono_t& first, chrono_t& last)
{
	// TO DO: Is the childBounds property reliable to get the full archive's span?

	if (!archive.valid())
		return;

	IObject archiveTop = archive.getTop();
    if ( archiveTop.getProperties().getPropertyHeader( ".childBnds" ) != NULL ) { // Try to get timing from childBounds first

        IBox3dProperty childbnds = Alembic::Abc::IBox3dProperty( archive.getTop().getProperties(),
                                   ".childBnds", ErrorHandler::kQuietNoopPolicy); 
    	TimeSamplingPtr ts = childbnds.getTimeSampling();
		first = std::min(first, ts->getSampleTime(0) );
		last = std::max(last, ts->getSampleTime(childbnds.getNumSamples()-1) );
        return;
    }

	unsigned int numChildren = archiveTop.getNumChildren();

	for (unsigned i=0; i<numChildren; ++i)  // Visit every object to get its first and last sample
	{
		IObject obj( archiveTop.getChild( i ));
		getObjectTimeSpan(obj, first, last, true);

	}

}

void scopingTest(bool useOgawa)
{
    {
        OObject top;
        {
            OArchive archive;
            if (useOgawa)
            {
                archive = CreateArchiveWithInfo(
                    Alembic::AbcCoreOgawa::WriteArchive(),
                    "archiveScopeTest.abc",
                    "Alembic test", "", MetaData() );
            }
            else
            {
                archive = CreateArchiveWithInfo(
                    Alembic::AbcCoreHDF5::WriteArchive(),
                    "archiveScopeTest.abc",
                    "Alembic test", "", MetaData() );
            }
            top = archive.getTop();
        }
        OObject childA( top, "a");
        OObject childB( top, "b");
        ODoubleProperty prop(top.getProperties(), "prop", 0);
        TESTING_ASSERT(prop.getObject().getArchive().getName() ==
            "archiveScopeTest.abc");
    }

    {
        IObject top;
        {
            AbcF::IFactory factory;
            AbcF::IFactory::CoreType coreType;
            IArchive archive = factory.getArchive("archiveScopeTest.abc",
                                                  coreType);

           TESTING_ASSERT( (useOgawa && coreType == AbcF::IFactory::kOgawa) ||
                           (!useOgawa && coreType == AbcF::IFactory::kHDF5) );

            top = archive.getTop();

            double start, end;
            GetArchiveStartAndEndTime( archive, start, end );
            TESTING_ASSERT( start == DBL_MAX && end == -DBL_MAX );
        }
        TESTING_ASSERT(top.getNumChildren() == 2 );
        TESTING_ASSERT(top.getChildHeader("a") != NULL);
        TESTING_ASSERT(top.getChildHeader("b") != NULL);
        TESTING_ASSERT( ! top.getParent().valid() );
        TESTING_ASSERT( top.getArchive().getName() ==
            "archiveScopeTest.abc");
        IScalarProperty prop(top.getProperties(), "prop");
        TESTING_ASSERT(prop.valid());
        TESTING_ASSERT(prop.getObject().getArchive().getName() ==
            "archiveScopeTest.abc");
    }
}

//-*****************************************************************************
void visitObject( IObject iObj )
{
    std::string path = iObj.getFullName();

    const MetaData &md = iObj.getMetaData();

    if ( IPolyMeshSchema::matches( md ) || ISubDSchema::matches( md ) )
    {
        Box3d bnds = getBounds( iObj );
        std::cout << path << " " << bnds.min << " " << bnds.max << std::endl;
    }

    // now the child objects
    for ( size_t i = 0 ; i < iObj.getNumChildren() ; i++ )
    {
        visitObject( IObject( iObj, iObj.getChildHeader( i ).getName() ) );
    }
}

//-*****************************************************************************
void simpleTestIn( const std::string &iArchiveName )
{
    IArchive archive( Alembic::AbcCoreHDF5::ReadArchive(),
                      iArchiveName, ErrorHandler::kThrowPolicy );

    IObject archiveTop = archive.getTop();

    TESTING_ASSERT( archiveTop.getNumChildren() == NUM_TOP_CHILDREN );

    for ( int i = 0 ; i < NUM_TOP_CHILDREN ; i++ )
    {
        std::string cname = boost::lexical_cast<std::string>( i );
        IObject obj( archiveTop, cname );
        readDeepHierarchy( obj, 0, obj  );
    }

    TESTING_ASSERT( PATHS.size() == NUM_TOP_CHILDREN );
}

//-*****************************************************************************
void getABCTimeSpan(IArchive archive, chrono_t& first, chrono_t& last)
{
	// TO DO: Is the childBounds property reliable to get the full archive's span?

	if (!archive.valid())
		return;

	IObject archiveTop = archive.getTop();

	unsigned int numChildren = archiveTop.getNumChildren();

	for (unsigned i=0; i<numChildren; ++i)
	{
		IObject obj( archiveTop.getChild( i ));
		getObjectTimeSpan(obj, first, last, true);

	}

}

bool getNamedCamera( IObject iObjTop, const std::string &iName, ICamera &iCam )
{
	// Return true if found

	const Alembic::AbcGeom::MetaData &md = iObjTop.getMetaData();
	if ( (iObjTop.getName() == iName) && (ICamera::matches( md )) )
	{
		iCam = ICamera(iObjTop, kWrapExisting );
		return true;
	}

	// now the child objects
	for ( size_t i = 0 ; i < iObjTop.getNumChildren() ; i++ )
	{
		if (getNamedCamera(IObject( iObjTop, iObjTop.getChildHeader( i ).getName() ), iName, iCam ))
			return true;
	}

	return false;

}

//-*****************************************************************************
void simpleTestIn( const std::string &iArchiveName )
{
    AbcF::IFactory factory;
    factory.setPolicy(  ErrorHandler::kThrowPolicy );
    AbcF::IFactory::CoreType coreType;
    IArchive archive = factory.getArchive(iArchiveName, coreType);

    IObject archiveTop = archive.getTop();

    TESTING_ASSERT( archiveTop.getNumChildren() == ( size_t )NUM_TOP_CHILDREN );

    for ( int i = 0 ; i < NUM_TOP_CHILDREN ; i++ )
    {
        std::ostringstream strm;
        strm << i;
        std::string cname = strm.str();
        IObject obj( archiveTop, cname );
        readDeepHierarchy( obj, 0, obj  );
    }

    TESTING_ASSERT( PATHS.size() == ( size_t ) NUM_TOP_CHILDREN );
}

//-*****************************************************************************
void visitObject( IObject iObj,
                  std::string iIndent )
{
    // Object has a name, a full name, some meta data,
    // and then it has a compound property full of properties.
    std::string path = iObj.getFullName();

    if ( path != "/" )
    {
        std::cout << "Object " << "name=" << path << std::endl;
    }

    // Get the properties.
    ICompoundProperty props = iObj.getProperties();
    visitProperties( props, iIndent );

    // now the child objects
    for ( size_t i = 0 ; i < iObj.getNumChildren() ; i++ )
    {
        visitObject( IObject( iObj, iObj.getChildHeader( i ).getName() ),
                     iIndent );
    }
}