C++ IArchive::getMaxNumSamplesForTimeSamplingIndex方法代码示例

void readProperty(const std::string &archiveName, bool useOgawa)
{
    // Open an existing archive for reading. Indicate that we want
    //   Alembic to throw exceptions on errors.
    std::cout  << "Reading " << archiveName << std::endl;
    AbcF::IFactory factory;
    factory.setPolicy(  ErrorHandler::kThrowPolicy );
    AbcF::IFactory::CoreType coreType;
    IArchive archive = factory.getArchive(archiveName, coreType);
    ABCA_ASSERT( (useOgawa && coreType == AbcF::IFactory::kOgawa) ||
                    (!useOgawa && coreType == AbcF::IFactory::kHDF5),
                  "File did not open as the expected type." );

    IObject archiveTop = archive.getTop();

    // Determine the number of (top level) children the archive has
    const unsigned int numChildren =  archiveTop.getNumChildren();
    ABCA_ASSERT( numChildren == 1, "Wrong number of children (expected 1)");
    std::cout << "The archive has " << numChildren << " children:"
              << std::endl;


    // Iterate through them, print out their names
    IObject child( archiveTop, archiveTop.getChildHeader( 0 ).getName() );
    std::cout << "  " << child.getName();


    // Properties
    ICompoundProperty props = child.getProperties();
    size_t numProperties = props.getNumProperties();  // only top-level props
    ABCA_ASSERT( numProperties == 1,
                 "Expected 1 property, found " << numProperties);
    std::cout << " with one property";


    std::vector<std::string> propNames(1);
    propNames[0] = props.getPropertyHeader(0).getName();
    std::cout << " named " << propNames[0] << std::endl;

    PropertyType pType = props.getPropertyHeader(0).getPropertyType();
    ABCA_ASSERT( pType == kScalarProperty,
                 "Expected a scalar property, but didn't find one" );

    std::cout << " which is a scalar property";



    DataType dType = props.getPropertyHeader(0).getDataType();
    ABCA_ASSERT( dType.getPod() == kFloat64POD,
                 "Expected a double (kFloat64POD) property, but didn't"
                 " find one" );

    // We know this is a scalar property (I'm eliding the if/else
    //  statements required to recognize this)
    IDoubleProperty mass( props, propNames[0] );

    size_t numSamples = mass.getNumSamples();
    std::cout << ".. it has " << numSamples << " samples" << std::endl;
    //ABCA_ASSERT( numSamples == 5, "Expected 5 samples, found " << numSamples );

    TimeSamplingPtr ts = mass.getTimeSampling();

    std::cout << "..with time/value pairs: ";
    for (unsigned int ss=0; ss<numSamples; ss++)
    {
        ISampleSelector iss( (index_t) ss);
        std::cout << ts->getSampleTime( (index_t) ss ) << "/";
        printSampleValue( mass, iss );
        std::cout << " ";

        double timeDiff = ts->getSampleTime( (index_t) ss ) -
            (g_startTime + (ss*(g_dt/3.0)));
        ABCA_ASSERT( fabs(timeDiff) < 1e-12, "Incorrect sample time read" );


        double massDiff = mass.getValue( iss ) - (1.0 + 0.1*ss);
        ABCA_ASSERT( fabs(massDiff) < 1e-12, "Incorrect sample value read" );
    }
    ABCA_ASSERT(
        archive.getMaxNumSamplesForTimeSamplingIndex(1) == (index_t) numSamples,
        "Incorrect number of max samples for Time Sampling ID 1.");
    std::cout << std::endl;

    // Done - the archive closes itself
}

void readV3fArrayProperty(const std::string &archiveName, bool useOgawa)
{
    // Open an existing archive for reading. Indicate that we want
    //   Alembic to throw exceptions on errors.
    std::cout  << "Reading " << archiveName << std::endl;
    AbcF::IFactory factory;
    factory.setPolicy(  ErrorHandler::kThrowPolicy );
    AbcF::IFactory::CoreType coreType;
    IArchive archive = factory.getArchive(archiveName, coreType);
    TESTING_ASSERT( (useOgawa && coreType == AbcF::IFactory::kOgawa) ||
                    (!useOgawa && coreType == AbcF::IFactory::kHDF5) );

    IObject archiveTop = archive.getTop();

    // Determine the number of (top level) children the archive has
    const unsigned int numChildren =  archiveTop.getNumChildren();
    ABCA_ASSERT( numChildren == 1, "Wrong number of children (expected 1)");
    std::cout << "The archive has " << numChildren << " children:"
              << std::endl;

    // Iterate through them, print out their names
    IObject child( archiveTop, archiveTop.getChildHeader(0).getName() );
    std::cout << "  named '" << child.getName() << "'";

    // Properties
    ICompoundProperty props = child.getProperties();
    size_t numProperties = props.getNumProperties();  // only top-level props
    ABCA_ASSERT( numProperties == 1,
                 "Expected 1 property, found " << numProperties);
    std::cout << " with one property";

    std::vector<std::string> propNames(1);
    propNames[0] = props.getPropertyHeader(0).getName();
    std::cout << " named '" << propNames[0] << "'" << std::endl;


    PropertyType pType = props.getPropertyHeader(0).getPropertyType();
    ABCA_ASSERT( pType == kArrayProperty,
                 "Expected an array property, but didn't find one" );

    std::cout << " which is an array property";

    DataType dType = props.getPropertyHeader(0).getDataType();
    ABCA_ASSERT( dType.getPod() == kFloat32POD,
                 "Expected an v3f property, but didn't find one" );


    // We know this is an array property (I'm eliding the if/else
    //  statements required to recognize and handle this properly)
    IV3fArrayProperty positions( props, propNames[0] );
    size_t numSamples = positions.getNumSamples();
    std::cout << ".. it has " << numSamples << " samples" << std::endl;
    ABCA_ASSERT( numSamples == 5, "Expected 5 samples, found " << numSamples );

    TimeSamplingPtr ts = positions.getTimeSampling();
    std::cout << "..with time/value pairs: " << std::endl;;
    for (unsigned int ss=0; ss<numSamples; ss++)
    {
        std::cout << "   ";
        ISampleSelector iss( (index_t) ss);
        std::cout << ts->getSampleTime( (index_t) ss ) << " / ";

        V3fArraySamplePtr samplePtr;
        positions.get( samplePtr, iss );
        std::cout << "[ ";
        size_t numPoints = samplePtr->size();
        for ( size_t jj=0 ; jj<numPoints ; jj++ )
            std::cout << (*samplePtr)[jj] << " ";
        std::cout << "]" << std::endl;

        if (ss == 2) // no entries in sample #2
        {
            ABCA_ASSERT( numPoints == 0,
                         "Expected an empty sample, but found " << numPoints
                         << " entries." );
        }
        else
        {
            for ( size_t jj=0 ; jj<numPoints ; jj++ )
                ABCA_ASSERT( (*samplePtr)[jj] == g_vectors[jj],
                             "Incorrect value read from archive." );
        }

    }
    ABCA_ASSERT(
        archive.getMaxNumSamplesForTimeSamplingIndex(1) == (index_t) numSamples,
        "Incorrect number of max samples in readV3fArrayProperty." );
    std::cout << std::endl;
    // Done - the archive closes itself

    double start, end;
    GetArchiveStartAndEndTime( archive, start, end );

    TESTING_ASSERT( almostEqual(start, 123.0) );
    TESTING_ASSERT( almostEqual(end, 123.0 + 4.0 / 24.0) );
}