IXform.h

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//-*****************************************************************************
//
// Copyright (c) 2009-2012,
//  Sony Pictures Imageworks, Inc. and
//  Industrial Light & Magic, a division of Lucasfilm Entertainment Company Ltd.
//
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//-*****************************************************************************

#ifndef Alembic_AbcGeom_IXform_h
#define Alembic_AbcGeom_IXform_h

#include <Alembic/Util/Export.h>
#include <Alembic/AbcGeom/Foundation.h>
#include <Alembic/AbcGeom/SchemaInfoDeclarations.h>

#include <Alembic/AbcGeom/XformSample.h>

namespace Alembic {
namespace AbcGeom {
namespace ALEMBIC_VERSION_NS {

//-*****************************************************************************
class ALEMBIC_EXPORT IXformSchema : public Abc::ISchema<XformSchemaInfo>
{
    //-*************************************************************************
    // XFORM SCHEMA
    //-*************************************************************************
public:

    //! By convention we always define this_type in AbcGeom classes.
    //! Used by unspecified-bool-type conversion below
    typedef Abc::ISchema<XformSchemaInfo> super_type;
    typedef IXformSchema this_type;
    typedef XformSample sample_type;

    //-*************************************************************************
    // CONSTRUCTION, DESTRUCTION, ASSIGNMENT
    //-*************************************************************************

    //! The default constructor creates an empty OPolyMeshSchema
    //! ...
    IXformSchema()
    {
        m_useArrayProp = false;
        m_isConstant = true;
        m_isConstantIdentity = true;
    }

    //! This constructor creates a new xform reader.
    //! The first argument is the parent ICompoundProperty, from which the
    //! error handler policy for is derived.  The second argument is the name
    //! of the ICompoundProperty that contains this schemas properties.  The
    //! remaining optional arguments can be used to override the
    //! ErrorHandlerPolicy and to specify schema interpretation matching.
    IXformSchema( const ICompoundProperty &iParent,
                  const std::string &iName,
                  const Abc::Argument &iArg0 = Abc::Argument(),
                  const Abc::Argument &iArg1 = Abc::Argument() )
      : Abc::ISchema<XformSchemaInfo>( iParent, iName, iArg0, iArg1 )
    {
        // Meta data and error handling are eaten up by
        // the super type, so all that's left is SchemaInterpMatching.
        init( iArg0, iArg1 );
    }

    //! This constructor wraps an existing ICompoundProperty as the xform
    //! reader, and the error handler policy is derived from it.
    //! The  remaining optional arguments can be used to override the
    //! ErrorHandlerPolicy and to specify schema interpretation matching.
    IXformSchema( const ICompoundProperty &iProp,
                  const Abc::Argument &iArg0 = Abc::Argument(),
                  const Abc::Argument &iArg1 = Abc::Argument() )
      : Abc::ISchema<XformSchemaInfo>( iProp, iArg0, iArg1 )
    {
        init( iArg0, iArg1 );
    }

    //! explicit copy constructor to work around Windows compiler bug
    IXformSchema( const IXformSchema &iCopy )
        : Abc::ISchema<XformSchemaInfo>()
    {
        *this = iCopy;
    }

    AbcA::TimeSamplingPtr getTimeSampling() const;

    bool isConstant() const { return m_isConstant; }

    //! is this xform both constant and identity?
    bool isConstantIdentity() const { return m_isConstantIdentity; }

    size_t getNumSamples() const;

    //! fill the supplied sample reference with values
    void get( XformSample &oSamp,
              const Abc::ISampleSelector &iSS = Abc::ISampleSelector() ) const;

    XformSample getValue( const Abc::ISampleSelector &iSS =
                          Abc::ISampleSelector() ) const;

    Abc::IBox3dProperty getChildBoundsProperty() const
    {
        return m_childBoundsProperty;
    }

    // lightweight get to avoid constructing a sample
    // see XformSample.h for explanation of this property
    bool getInheritsXforms( const Abc::ISampleSelector &iSS =
                            Abc::ISampleSelector() ) const;

    size_t getNumOps() const { return m_sample.getNumOps(); }

    //! Reset returns this function set to an empty, default
    //! state.
    void reset()
    {
        m_childBoundsProperty.reset();
        m_sample = XformSample();
        m_inheritsProperty.reset();
        m_isConstant = true;
        m_isConstantIdentity = true;

        m_arbGeomParams.reset();
        m_userProperties.reset();

        super_type::reset();
    }

    //! Valid returns whether this function set is valid.
    bool valid() const
    {
        return ( super_type::valid() );
    }

    ICompoundProperty getArbGeomParams() const { return m_arbGeomParams; }

    ICompoundProperty getUserProperties() const { return m_userProperties; }

    //! unspecified-bool-type operator overload.
    //! ...
    ALEMBIC_OVERRIDE_OPERATOR_BOOL( this_type::valid() );


protected:
    Abc::IBox3dProperty m_childBoundsProperty;

    AbcA::BasePropertyReaderPtr m_valsProperty;

    Abc::IBoolProperty m_inheritsProperty;

    Abc::ICompoundProperty m_arbGeomParams;
    Abc::ICompoundProperty m_userProperties;

    bool m_isConstant;

    bool m_isConstantIdentity;

    XformSample m_sample;

private:
    void init( const Abc::Argument &iArg0, const Abc::Argument &iArg1 );

    // is m_vals an ArrayProperty, or a ScalarProperty?
    bool m_useArrayProp;

    // fills m_valVec with data
    void getChannelValues( const AbcA::index_t iSampleIndex,
                           XformSample & oSamp ) const;
};

//-*****************************************************************************
// SCHEMA OBJECT
//-*****************************************************************************
typedef Abc::ISchemaObject<IXformSchema> IXform;

typedef Util::shared_ptr< IXform > IXformPtr;

} // End namespace ALEMBIC_VERSION_NS

using namespace ALEMBIC_VERSION_NS;

} // End namespace AbcGeom
} // End namespace Alembic

#endif