gls_angular_scale.h

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/*! \file
  \brief  The disti::GlsAngularScale class and global enumerations.

  \par Copyright Information

  Copyright (c) 2017 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 _GLS_ANGULAR_SCALE_H
#define _GLS_ANGULAR_SCALE_H

#include "glpolygon.h"
#include "gls_cpp_lang_support.h"

#ifdef GLES
#    include "gls_quad_storage.h"
#else
#    include "gls_display_list.h"
#endif

//////////////////// Provides support for creating DLLs ////////////////////////
#if( defined( GLSGEN_EXPORT_GLSANGULARSCALE ) || defined( GLSGEN_IMPORT_GLSANGULARSCALE ) || defined( GLS_EXPORT_GENERATED ) || defined( GLS_IMPORT_GENERATED ) ) \
    && defined( _MSC_VER )
#    if defined( GLSGEN_EXPORT_GLSANGULARSCALE ) || defined( GLS_EXPORT_GENERATED )
#        define GLSGEN_GLSANGULARSCALE_EXPORT __declspec( dllexport )
#    else
#        define GLSGEN_GLSANGULARSCALE_EXPORT __declspec( dllimport )
#    endif
#else
#    define GLSGEN_GLSANGULARSCALE_EXPORT
#endif
///////////////////////////////////////////////////////////////////////////////

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

namespace disti
{
#ifdef GLES
// Forward Declaration
class GlsGloFileAttribute;
#endif
// SetValue enumerations
enum
{
    GLS_ANGULAR_SCALE_FIRST_VALUE = GLS_LAST_INITIALIZER + 1,
    GLS_ANGULAR_SCALE_RADII,
    GLS_ANGULAR_SCALE_DECONFLICT_TICKS,
    GLS_ANGULAR_SCALE_HALO_ENABLED,
    GLS_ANGULAR_SCALE_HALO_WIDTH,
    GLS_ANGULAR_SCALE_HALO_COLOR,
    GLS_ANGULAR_SCALE_USE_SCALABLE_LINES,
    GLS_ANGULAR_SCALE_RADIUS,
    GLS_ANGULAR_SCALE_DATA
};

class GlsAngularScaleData
{
protected:
    DistiAttribDict _attribDict;

public:
    bool         active;       /**< True if this scale is active */
    bool         useLineColor; /**< True if this scale draws with line color */
    unsigned int ticks;        /**< Number of ticks on this scale */
    float        startAngle;   /**< Start angle in degrees */
    float        interval;     /**< Interval between ticks in degrees */
    float        length;       /**< Length of ticks in logical units */
    float        thickness;    /**< Thickness of ticks in logical units */
    GlsColor     color;        /**< Color to draw ticks if line color is not being used*/

    GlsAngularScaleData( void )
        : active( false )
        , useLineColor( false )
        , ticks( 0 )
        , startAngle( 0 )
        , interval( 0 )
        , length( 0 )
        , thickness( 1 )
        , color( 255, 255, 255, 255 )
    {
        InitMetaData();
    }

    GlsAngularScaleData(
        bool            _active,
        bool            _useLineColor,
        unsigned int    _ticks,
        float           _startAngle,
        float           _interval,
        float           _length,
        float           _thickness,
        const GlsColor& _color )
        : active( _active )
        , useLineColor( _useLineColor )
        , ticks( _ticks )
        , startAngle( _startAngle )
        , interval( _interval )
        , length( _length )
        , thickness( _thickness )
        , color( _color )
    {
        InitMetaData();
    }

    GlsAngularScaleData( const GlsAngularScaleData& src )
    {
        *this = src;
    }

    ~GlsAngularScaleData( void )
    {
    }

    bool GLSGEN_GLSANGULARSCALE_EXPORT operator==( const GlsAngularScaleData& right ) const;

    bool GLSGEN_GLSANGULARSCALE_EXPORT operator!=( const GlsAngularScaleData& right ) const
    {
        return !( this->operator==( right ) );
    }

    void GLSGEN_GLSANGULARSCALE_EXPORT InitMetaData( void );

    // Writes this to a stream
    virtual GLSGEN_GLSANGULARSCALE_EXPORT std::ostream& WriteValue( std::ostream& outstr );

    // Reads this from a stream
    virtual GLSGEN_GLSANGULARSCALE_EXPORT std::istream& ReadValue( std::istream& instr );
};

#define GLS_ANGULAR_SCALE_MAX 5

typedef GlsAngularScaleData GlsAngularScaleDataArray[ GLS_ANGULAR_SCALE_MAX ];

/** Runtime implementation of a GlsAngularScale */
class GlsAngularScale : public GLPolygon
{
    friend class GlsAngularScaleEditor;

private:
    GlsAngularScale& operator=( const GlsAngularScale& ) DISTI_SPECIAL_MEM_FUN_DELETE;
    GlsAngularScale( const GlsAngularScale& ) DISTI_SPECIAL_MEM_FUN_DELETE;

public:
    typedef GLPolygon _BaseClass;

    /** Create a new GlsAngularScale.
      * \param generateInstance  Whether or not to generate an instance name
      * for this inputdevice */
    GLSGEN_GLSANGULARSCALE_EXPORT GlsAngularScale( bool generateInstance = false );

    /** The copy constructor for GlsAngularScale
     * 
     * \param that          The GlsAngularScale object that is being copied
     * \param generateNames Whether or not to generate a new instance name
     */
    GLSGEN_GLSANGULARSCALE_EXPORT GlsAngularScale( const GlsAngularScale& that, const bool generateNames );

    /** Destructs a GlsAngularScale object */
    virtual GLSGEN_GLSANGULARSCALE_EXPORT ~GlsAngularScale();

    static GLSGEN_GLSANGULARSCALE_EXPORT DisplayObject* CreateInstance();

    virtual GLSGEN_GLSANGULARSCALE_EXPORT void SetAvailableAttributes( unsigned int value );

    virtual GLSGEN_GLSANGULARSCALE_EXPORT DisplayObject* CloneObject( bool generateNames = false );

    virtual GLSGEN_GLSANGULARSCALE_EXPORT void CopyProperties( DisplayObject* src );

    virtual GLSGEN_GLSANGULARSCALE_EXPORT void CopyGeometry( DisplayObject* srcArg );

#ifndef GLES
    virtual GLSGEN_GLSANGULARSCALE_EXPORT InterfaceListType* GetCppInterfaceDescription( InterfaceListType* addToThisList = NULL );
    virtual GLSGEN_GLSANGULARSCALE_EXPORT void               GetCppInterfaceDescriptionFree( InterfaceListType* array );
#endif
    virtual GLSGEN_GLSANGULARSCALE_EXPORT void PreDraw( const OpenGLMatrices& parentMatrices, Culler& culler );
    virtual GLSGEN_GLSANGULARSCALE_EXPORT void Draw( void );

    virtual GLSGEN_GLSANGULARSCALE_EXPORT void Scale( float px, float py, float pz, Vertex* anchor, int handleBar );
    virtual GLSGEN_GLSANGULARSCALE_EXPORT void Rotate( const Vector& orig, float angle, const Vector& axis );
    virtual GLSGEN_GLSANGULARSCALE_EXPORT bool Hit( float x, float y, float z, float scale, const Vector& directionVector, Vector* collisionPoint );

    virtual GLSGEN_GLSANGULARSCALE_EXPORT Vertex* Vertices();
    virtual GLSGEN_GLSANGULARSCALE_EXPORT void    GetExtents( float& minx, float& miny, float& minz, float& maxx, float& maxy, float& maxz );
    virtual GLSGEN_GLSANGULARSCALE_EXPORT void    GetTransformedExtents( Vector& min, Vector& max, const GlsMatrixType& matrix, bool resetMinMax );
    virtual GLSGEN_GLSANGULARSCALE_EXPORT void    UpdateBoundingVolume( void );

    virtual GLSGEN_GLSANGULARSCALE_EXPORT void SetColor( const GlsColor& color );
    inline void                                SetLineColor( const GlsColor& color ) { SetColor( color ); }

#ifndef GLES
    virtual GLSGEN_GLSANGULARSCALE_EXPORT void AntiAlias( bool alias );
#endif

    DisplayObject* handle( DisplayEvent* ev );

    virtual void SetValue( int spec, va_list& args );

    //////////////////////////////////////////////////
    // GlsAngularScale specific operations
    //////////////////////////////////////////////////

    /** Initializes data for one of the scales
      * \param index  Zero based index of the scale to set
      * \param data   The data to set
      */
    GLSGEN_GLSANGULARSCALE_EXPORT void SetScale( int index, const GlsAngularScaleData& data );

    /** Gets data for one of the scales
      * \param index  Zero based index of the scale to get
      * \param data   The GlsAngularScaleData structure to fill
      */
    GLSGEN_GLSANGULARSCALE_EXPORT void GetScale( int index, GlsAngularScaleData& data );

    /** Sets the tick deconfliction state for this scale
      * \param val  Wether or not to enable tick deconfliction
      */
    GLSGEN_GLSANGULARSCALE_EXPORT void DeconflictTicks( const bool& val );

    /** Gets the tick deconfliction state for this scale
      * \return Whether or not tick deconfliction is enabled
      */
    GLSGEN_GLSANGULARSCALE_EXPORT bool DeconflictTicks( void ) { return _deconflictTicks; }

    /** Gets the halo state for this scale
      * \return Whether or not halo is enabled
      */
    GLSGEN_GLSANGULARSCALE_EXPORT bool HaloEnabled( void ) { return _haloEnabled; }

    /** Sets the halo state for this scale
      * \param val  Wether or not to enable halo
      */
    GLSGEN_GLSANGULARSCALE_EXPORT void HaloEnabled( const bool& val );

    /** Gets the halo width for this scale
      * \return The halo width for this scale
      */
    GLSGEN_GLSANGULARSCALE_EXPORT float HaloWidth( void ) { return _haloWidth; }

    /** Sets the halo width for this scale
      * \param val  New halo width
      */
    GLSGEN_GLSANGULARSCALE_EXPORT void HaloWidth( const float& val );

    /** Gets the halo color for this scale
      * \return The halo color for this scale
      */
    GLSGEN_GLSANGULARSCALE_EXPORT GlsColor HaloColor( void ) { return _haloColor; }

    /** Sets the halo color for this scale
      * \param val  New halo color
      */
    GLSGEN_GLSANGULARSCALE_EXPORT void HaloColor( const GlsColor& val );

#ifndef GLES
    /** Gets the drawing mode for this scale
      * \return The drawing mode for this scale
      */
    GLSGEN_GLSANGULARSCALE_EXPORT bool UseScalableLines( void ) { return _useScalableLines; }

    /** Sets the drawing mode for this scale
      * \param val  New drawing mode
      */
    GLSGEN_GLSANGULARSCALE_EXPORT void UseScalableLines( const bool& val );

#endif
    /** Gets the radius for this scale
      * \return The radius for this scale
      */
    GLSGEN_GLSANGULARSCALE_EXPORT float Radius( void )
    {
        return _magnitude[ 0 ];
    }

    /** Sets the radius for this scale
      * \param val  New radius
      */
    GLSGEN_GLSANGULARSCALE_EXPORT void Radius( const float& val );

#ifdef GLES
    /** Causes the VBO for this object to be recomputed */
    GLSGEN_GLSANGULARSCALE_EXPORT void InvalidateGeometry( void ) { _geometryRefresh = true; }
#else
    /** Causes the VBO for this object to be recomputed */
    GLSGEN_GLSANGULARSCALE_EXPORT void InvalidateGeometry( void ) { _displayList.Invalidate(); }

    /** Returns a reference to this object's display list */
    GLSGEN_GLSANGULARSCALE_EXPORT GlsDisplayList& DisplayList( void ) { return _displayList; }
#endif

protected:
    /** True when the object's vertices need to be recalculated */
    bool _needsRecalculate;

    /** Calculates _radii based on_magnitude and _radiiUnit */
    void MagnitudeChanged( void );

    /** Calculates _radiiUnit and _magnitude based on _radii */
    void CalculateRadiiUnit( void );

#ifdef GLES
    /** Manages a VBO for drawing the tick marks */
    GlsQuadListVC_3D _quads;

    /** Updates the VBO when the object changes */
    void BakeVBO();
#endif

#ifndef GLES
    /** Minimizes calls to glColor when drawing the scale */
    void CurrentColor( const GlsColor& newColor );

    /** Minimizes calls to glLineWidth when drawing the scale */
    void CurrentLineWidth( const float& newLineWidth );

    /** Stores the current color.  Used when calculating a new display list so that redundant 
      * glColor calls are not made */
    GlsColor _currentColor;

    /** Stores the current line width.  Used when calculating a new display list so that redundant 
      * glLineWidth calls are not made */
    float _currentLineWidth;

    /** True if the current color has been set.  Gets reset every time a new display list is
      * recalculated. */
    bool _currentColorSet;

    /** True if the current line width has been set.  Gets reset every time a new display list is
      * recalculated. */
    bool _currentLineWidthSet;

    /** Stores the scale in a display list for faster drawing */
    GlsDisplayList _displayList;
#endif

    /** Recomputes the object's vertices from its radii */
    void RecomputeVertices( void );

    /** Determines if a tick with the given angle should be drawn or not.  If a higher priority 
      * scale already has a tick at that level and deconfliction is enabled, then this method
      * will return false */
    bool TickNeeded( int currentLevel, float currentAngle );

    /// Calculates and draws a single scale using the given halo length and thickness
    /// \param i               The index of the scale to draw
    /// \param haloLength      The length of the halo
    /// \param haloThickness   The thickness of the halo
#ifdef GLES
    /// \param color           The color of the scale
    void DrawScale( int i, float haloLength, float haloThickness, GlsColor& color );
#else
    void                                          DrawScale( int i, float haloLength, float haloThickness );
#endif

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

#ifndef GLES
    /** Calculates current tick mark locations and performs OpenGL drawing commands */
    virtual void DrawGeometry( void );
#endif

    /** Always equal to _radiiUnit * _magnitude */
    Vector _radii[ 2 ];

    /** Unit vectors describing the radii */
    Vector _radiiUnit[ 2 ];

    /** Magnitudes of the two radii */
    float _magnitude[ 2 ];

    /** The particulars of each scale */
    GlsAngularScaleDataArray _scale;

    /** True if duplicated tick marks are removed */
    bool _deconflictTicks;

    /** True if haloing is enabled */
    bool _haloEnabled;

    /** Width of the halo in logical units */
    float _haloWidth;

    /** Color of the halo */
    GlsColor _haloColor;

#ifndef GLES
    /** True if scale is drawn with polygon quads instead of lines*/
    bool _useScalableLines;
#endif
};

/** Metadata for scale data */
class DistiAttributeConnectionGlsAngularScaleDataArray : public DistiAttributeBase
{
protected:
    GlsAngularScaleDataArray* _attribPtr;
    unsigned int              _arraySize;

public:
    DistiAttributeConnectionGlsAngularScaleDataArray( CallbackMethodCallerBase* callback, const AttributeName& name, GlsAngularScaleDataArray* attribPtr, int arraySize )
        : DistiAttributeBase( callback, name, false )
        , _attribPtr( attribPtr )
        , _arraySize( arraySize )
    {
    }

    virtual ~DistiAttributeConnectionGlsAngularScaleDataArray();
    virtual bool          OkToWrite() const;
    virtual std::ostream& WriteValue( std::ostream& outstr );
    virtual std::istream& ReadValue( std::istream& instr );
};

} // namespace disti

#endif