gls_serial_morph_mesh.h

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

  \par Copyright Information

  Copyright (c) 2015 by The DiSTI Corporation.<br>
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  NO WARRANTY. THE SOFTWARE IS PROVIDED "AS-IS," WITHOUT WARRANTY OF ANY KIND,
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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 "group.h"
#include "gls_geometry_resource.h"
#include "gls_resource_file_mgr.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:
    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 DynamicArray<Keyframe_Data, false>
    {
    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);
    };

    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

    // 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