gls_serial_morph_mesh.h

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/*! \file
  \brief  The disti::GlsSerialMorphMesh class.

  \par Copyright Information

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*/

#ifndef INCLUDED_GLS_SERIAL_MORPH_MESH_H
#define INCLUDED_GLS_SERIAL_MORPH_MESH_H

#ifdef _WIN32
#    include <windows.h>
#endif

#include "gls_geometry_resource.h"
#include "gls_resource_file_mgr.h"
#include "group.h"

#include "gls_advanced_mesh.h"
#include "gls_cpp_lang_support.h"

//////////////////// Provides support for creating DLLs ////////////////////////
#if( defined( GLSGEN_EXPORT_GLSADVANCEDMESH ) || defined( GLSGEN_IMPORT_GLSADVANCEDMESH ) || defined( GLS_EXPORT_GENERATED ) || defined( GLS_IMPORT_GENERATED ) ) \
    && defined( _MSC_VER )
#    if defined( GLSGEN_EXPORT_GLSADVANCEDMESH ) || defined( GLS_EXPORT_GENERATED )
#        define GLSGEN_GlsSerialMorphMesh_EXPORT __declspec( dllexport )
#    else
#        define GLSGEN_GlsSerialMorphMesh_EXPORT __declspec( dllimport )
#    endif
#else
#    define GLSGEN_GlsSerialMorphMesh_EXPORT
#endif
///////////////////////////////////////////////////////////////////////////////

#define LIB_BASE_NAME "gls_advanced_mesh"
#include "gls_auto_lib.h"
#undef LIB_BASE_NAME

namespace disti
{
#ifdef GLES
// Forward Declaration
class GlsGloFileAttribute;
#endif

/** 
    The GlsSerialMorphMesh contains a series of morph targets (keyframes) that make up an animation.
*/
class GlsSerialMorphMesh : public GlsGeometryResourceMesh
{
public:
    DISTI_DEPRECATED( "This identifier is forbidden by the C++ standard. Use BaseClass instead." )
    typedef GlsGeometryResourceMesh _BaseClass;
    typedef GlsGeometryResourceMesh BaseClass;
    friend class GlsSerialMorphMeshEditor;

    /** Create a new GlsSerialMorphMesh. */
    GLSGEN_GlsSerialMorphMesh_EXPORT GlsSerialMorphMesh( void );

    GLSGEN_GlsSerialMorphMesh_EXPORT GlsSerialMorphMesh( const GlsSerialMorphMesh& that, const bool generateNames );

    /** Destructs a GlsSerialMorphMesh object */
    virtual GLSGEN_GlsSerialMorphMesh_EXPORT ~GlsSerialMorphMesh();

    static GLSGEN_GlsSerialMorphMesh_EXPORT DisplayObject* CreateInstance();

    //////////////////////////////////////////////////
    // Overridden base class methods
    //////////////////////////////////////////////////

    /* See base class */
    virtual GLSGEN_GlsSerialMorphMesh_EXPORT void SetAvailableAttributes( unsigned int value );
    virtual GLSGEN_GlsSerialMorphMesh_EXPORT DisplayObject* CloneObject( bool generateNames = false );
    virtual GLSGEN_GlsSerialMorphMesh_EXPORT void           CopyProperties( DisplayObject* src );
    virtual GLSGEN_GlsSerialMorphMesh_EXPORT void           CopyGeometry( DisplayObject* src );

#ifndef GLES
    virtual GLSGEN_GlsSerialMorphMesh_EXPORT InterfaceListType* GetCppInterfaceDescription( InterfaceListType* addToThisList = NULL );
    virtual GLSGEN_GlsSerialMorphMesh_EXPORT void               GetCppInterfaceDescriptionFree( InterfaceListType* array );
#endif

    virtual GLSGEN_GlsSerialMorphMesh_EXPORT void PreDraw( const OpenGLMatrices& parentMatrices, Culler& culler );
    //virtual GLSGEN_GlsSerialMorphMesh_EXPORT void Draw(void);

    //virtual GLSGEN_GlsSerialMorphMesh_EXPORT void UpdateBoundingVolume(void);

    //////////////////////////////////////////////////
    // GlsSerialMorphMesh specific operations
    //////////////////////////////////////////////////

    /** Set the number of keyframes in the mesh
        If this is less than the current number of keyframes, then keyframes >=NumKeyframes() will be released
        The initial Geometry and Values for new keyframes are undefined, be sure to fill them in before you
        try to draw/pick/etc.
        \param count the new number of keyframes
        */
    GLSGEN_GlsSerialMorphMesh_EXPORT void SetNumKeyframes( unsigned int count );

    /** Get the number of keyframes in the mesh
        \returns the number of keyframes
        */
    GLSGEN_GlsSerialMorphMesh_EXPORT unsigned int NumKeyframes();

    /** Set the geometry for the given keyframe.
      */
    GLSGEN_GlsSerialMorphMesh_EXPORT GlsGeometry_Generic* GetKeyframeGeometry( unsigned int index );

    /** Set the geometry for the given keyframe.
      * Note that the render geometry Type() is derived from keyframe 0.
      * If you modify the Type() of the keyframe geometry you must call this method to update the render mesh.
      * \param keyframeIndex
      * \param newKeyframeGeometry Pointer to the new geometry to use
      */
    GLSGEN_GlsSerialMorphMesh_EXPORT void SetKeyframeGeometry( unsigned int keyframeIndex, GlsGeometry_Generic* newKeyframeGeometry );

    /** Set the value for the given animation keyframe
      */
    GLSGEN_GlsSerialMorphMesh_EXPORT void SetKeyframePercent( unsigned int index, const float& value );

    /** Get the value for the given animation keyframe
      * \param index keyframe index
      * \returns percent 
      */
    GLSGEN_GlsSerialMorphMesh_EXPORT float GetKeyframePercent( unsigned int index );

    /** Set the mesh to the given animation value
      */
    GLSGEN_GlsSerialMorphMesh_EXPORT void SetMorphPercent( const float& value );

    /** Get the current animation value
      * \returns percent animation value
      */
    GLSGEN_GlsSerialMorphMesh_EXPORT float GetMorphPercent();

    /** Set the tension parameter.
      * Tension affects how the mesh is interpolated between targets.
      * \param value value to determine what interpolation is used
      * 0.0 is linear interpolation
      * higher values use spline interpolation to smooth out the transitions at each target.
      * Recommended values are 0.0 and 0.5.  Other values result in "special effects".
      */
    GLSGEN_GlsSerialMorphMesh_EXPORT void SetTension( const float& value );

    /** Get the current 'tension' value
      * \returns tension value
      */
    GLSGEN_GlsSerialMorphMesh_EXPORT float GetTension();

    /** Flag the render mesh as dirty so that it will be updated before it is drawn
      */
    inline void InvalidateRenderMesh() { _renderMeshIsValid = false; }

    /** Update the render mesh immeadiately
      * This is normally done as needed automatically
      */
    GLSGEN_GlsSerialMorphMesh_EXPORT void UpdateRenderMesh();

protected:
    /** GlsGeometryResourceMesh override
      */
    virtual GLSGEN_GlsSerialMorphMesh_EXPORT GlsGeometryResource* GetRenderMesh();

#ifdef GLES
    /** Set a single attribute from the GLO file.
     * \param data The attribute to set and its associated data.
     */
    virtual GLSGEN_GlsSerialMorphMesh_EXPORT void SetFromGloData( GlsGloFileAttribute& data );
#endif

    class Keyframe_Data
    {
    protected:
        DistiAttribDict* _attribDict;

        void SetupAttribDict();

    public:
        GlsGeometry_Generic* _geometry;
        float                _value;

        GLSGEN_GlsSerialMorphMesh_EXPORT Keyframe_Data();
        GLSGEN_GlsSerialMorphMesh_EXPORT Keyframe_Data( const Keyframe_Data& );
        GLSGEN_GlsSerialMorphMesh_EXPORT ~Keyframe_Data();
        GLSGEN_GlsSerialMorphMesh_EXPORT const Keyframe_Data& operator=( const Keyframe_Data& );

        GLSGEN_GlsSerialMorphMesh_EXPORT void SetGeometry( GlsGeometry_Generic* geom );
        GLSGEN_GlsSerialMorphMesh_EXPORT GlsGeometry_Generic* GetGeometry();

        GLSGEN_GlsSerialMorphMesh_EXPORT DistiAttribDict& Attributes();
    };

    class KeyframeDataArray
    {
    public:
        GlsSerialMorphMesh* _parentMesh;

        GLSGEN_GlsSerialMorphMesh_EXPORT KeyframeDataArray()
            : _parentMesh( NULL )
        {}

        static void element_read_func( int index, KeyframeDataArray& array, std::istream& instr );
        static void element_write_func( int index, KeyframeDataArray& array, std::ostream& outstr );

        void     Count( unsigned count ) { _keyframes.Count( count ); }
        unsigned Count() const { return _keyframes.Count(); }

        void Clear() { _keyframes.Clear(); }

        Keyframe_Data&       operator[]( const std::size_t index ) { return _keyframes[ static_cast<unsigned>( index ) ]; }
        const Keyframe_Data& operator[]( const std::size_t index ) const { return _keyframes[ static_cast<unsigned>( index ) ]; }

    private:
        DynamicArray<Keyframe_Data> _keyframes;
    };

    KeyframeDataArray _keyframes;

    // The current position in the animation
    float _currentValue;

    // The interpolation tension value
    float _tension;

    unsigned int _last_keyframe_index;  // The first keyframe where _value <= _currentValue
    unsigned int _next_keyframe_index;  // The next keyframe after last_keyframe_index where _value > _currentValue. If _value matches _currentValue exactly, then last_keyframe_index == next_keyframe_index
    float        _last_keyframe_weight; // The blend weight for the first keyframe [0,1]
    float        _next_keyframe_weight; // The blend weight for the next keyframe [0,1]

    bool                 _renderMeshIsValid;
    GlsGeometry_Generic* _renderMesh;

    // Update the _last_keyframe_index, _next_keyframe_index, _last_keyframe_weight and _next_keyframe_weight
    GLSGEN_GlsSerialMorphMesh_EXPORT void RecalculateKeyframeIndicesAndWeights();

    // Called by the KeyframeData class when the geometry changes.
    GLSGEN_GlsSerialMorphMesh_EXPORT void KeyframeGeometryChanged( Keyframe_Data* );

private:
#ifdef GLES
    int _gloKeyframeIndex;
#endif

    void CalculateBSplineInterpolation() const;

    // Used by constructors
    GLSGEN_GlsSerialMorphMesh_EXPORT void InitializeMembers();

    // Disable implicit generated Members
    GlsSerialMorphMesh& operator=( const GlsSerialMorphMesh& rhs ) DISTI_SPECIAL_MEM_FUN_DELETE;
    GlsSerialMorphMesh( const GlsSerialMorphMesh& src ) DISTI_SPECIAL_MEM_FUN_DELETE;
};

} // namespace disti

#endif