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 *   Licensed to the Apache Software Foundation (ASF) under one or more

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#ifndef INCLUDED_DRAWINGLAYER_GEOMETRY_VIEWINFORMATION3D_HXX

#define INCLUDED_DRAWINGLAYER_GEOMETRY_VIEWINFORMATION3D_HXX

#include <drawinglayer/drawinglayerdllapi.h>

#include <sal/config.h>

#include <o3tl/cow_wrapper.hxx>

// predefines

namespace drawinglayer::geometry {

    class ImpViewInformation3D;

}

namespace basegfx {

    class B3DHomMatrix;

}

namespace com::sun::star::beans { struct PropertyValue; }

namespace com::sun::star::uno { template <typename > class Sequence; }

namespace drawinglayer::geometry

    {

        /** ViewInformation3D class

            This class holds all view-relevant information for a 3d geometry. It works

            together with UNO API definitions and supports holding a sequence of PropertyValues.

            The most used data is for convenience offered directly using basegfx tooling classes.

            It is an implementation to support the sequence of PropertyValues used in a

            css::graphic::XPrimitive3D for C++ implementations working with those

        */

        class DRAWINGLAYER_DLLPUBLIC ViewInformation3D

        {

        public:

            typedef o3tl::cow_wrapper< ImpViewInformation3D, o3tl::ThreadSafeRefCountingPolicy > ImplType;

        private:

            /// pointer to private implementation class

            ImplType mpViewInformation3D;

        public:

            /** Constructor: Create a ViewInformation3D

                @param rObjectTransformation

                The Transformation from Object to World coordinates (normally logic coordinates).

                @param rOrientation

                A part of the 3D ViewTransformation, the World to Camera coordinates transformation

                which holds the camera coordinate system.

                @param rProjection

                A part of the 3D ViewTransformation, the Camera to Device transformation which

                transforms coordinates to a [0.0 .. 1.0] device range in X,Y and Z. Z may be used

                as source for Z-Buffers. This transformation may be e.g. a parallel projection,

                but also a perspective one and thus may use the last line of the matrix.

                @param rDeviceToView

                A part of the 3D ViewTransformation, the Device to View transformation which normally

                translates and scales from [0.0 .. 1.0] range in X,Y and Z to discrete position and

                size.

                rOrientation, rProjection and rDeviceToView define the 3D transformation pipeline

                and are normally used multiplied together to have a direct transformation from

                World to View coordinates

                @param fViewTime

                The time the view is defined for. Default is 0.0. This parameter is used e.g. for

                animated objects

                @param rExtendedParameters

                A sequence of property values which allows holding various other parameters besides

                the obvious and needed ones above. For this constructor none of the other parameters

                should be added as data. The constructor will parse the given parameters and if

                data for the other parameters is given, the value in rExtendedParameters will

                be preferred and overwrite the given parameter

            */

            ViewInformation3D(

                const basegfx::B3DHomMatrix& rObjectTransformation,

                const basegfx::B3DHomMatrix& rOrientation,

                const basegfx::B3DHomMatrix& rProjection,

                const basegfx::B3DHomMatrix& rDeviceToView,

                double fViewTime,

                const css::uno::Sequence< css::beans::PropertyValue >& rExtendedParameters);

            /** Constructor: Create a ViewInformation3D

                @param rViewParameters

                A sequence of property values which allows holding any combination of local and various

                other parameters. This constructor is fed completely with a sequence of PropertyValues

                which will be parsed to be able to offer the most used ones in a convenient way.

            */

            explicit ViewInformation3D(const css::uno::Sequence< css::beans::PropertyValue >& rViewParameters);

            /// default (empty) constructor

            ViewInformation3D();

            /// copy constructor

            ViewInformation3D(const ViewInformation3D&);

            ViewInformation3D(ViewInformation3D&&);

            /// destructor

            ~ViewInformation3D();

            // checks if the incarnation is default constructed

            bool isDefault() const;

            /// assignment operator

            ViewInformation3D& operator=(const ViewInformation3D&);

            ViewInformation3D& operator=(ViewInformation3D&&);

            /// compare operators

            bool operator==(const ViewInformation3D& rCandidate) const;

            bool operator!=(const ViewInformation3D& rCandidate) const { return !operator==(rCandidate); }

            /// data access

            const basegfx::B3DHomMatrix& getObjectTransformation() const;

            const basegfx::B3DHomMatrix& getOrientation() const;

            const basegfx::B3DHomMatrix& getProjection() const;

            const basegfx::B3DHomMatrix& getDeviceToView() const;

            double getViewTime() const;

            /// for convenience, the linear combination of the above four transformations is offered

            const basegfx::B3DHomMatrix& getObjectToView() const;

            /** Get the uno::Sequence< beans::PropertyValue > which contains only ViewInformation

                not offered directly

                Use this call if You only need ViewInformation which is not offered conveniently,

                but only exists as PropertyValue. This is e.g. used to create partially updated

                incarnations of ViewInformation3D without losing the only with PropertyValues

                defined data. It does not contain a complete description.

            */

            const css::uno::Sequence< css::beans::PropertyValue >& getExtendedInformationSequence() const;

        };

} // end of namespace drawinglayer::geometry

#endif //INCLUDED_DRAWINGLAYER_GEOMETRY_VIEWINFORMATION3D_HXX

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