gls_linear_scale.h

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

  \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_LINEAR_SCALE_H
#define _GLS_LINEAR_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_GLSLINEARSCALE ) || defined( GLSGEN_IMPORT_GLSLINEARSCALE ) || defined( GLS_EXPORT_GENERATED ) || defined( GLS_IMPORT_GENERATED ) ) \
    && defined( _MSC_VER )
#    if defined( GLSGEN_EXPORT_GLSLINEARSCALE ) || defined( GLS_EXPORT_GENERATED )
#        define GLSGEN_GLSLINEARSCALE_EXPORT __declspec( dllexport )
#    else
#        define GLSGEN_GLSLINEARSCALE_EXPORT __declspec( dllimport )
#    endif
#else
#    define GLSGEN_GLSLINEARSCALE_EXPORT
#endif
///////////////////////////////////////////////////////////////////////////////

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

namespace disti
{
// SetValue enumerations
enum
{
    GLS_LINEAR_SCALE_FIRST_VALUE = GLS_LAST_INITIALIZER + 1,
    GLS_LINEAR_SCALE_RADII,
    GLS_LINEAR_SCALE_DECONFLICT_TICKS,
    GLS_LINEAR_SCALE_HALO_ENABLED,
    GLS_LINEAR_SCALE_HALO_WIDTH,
    GLS_LINEAR_SCALE_HALO_COLOR,
    GLS_LINEAR_SCALE_TICK_ANCHOR,
    GLS_LINEAR_SCALE_USE_SCALABLE_LINES,
    GLS_LINEAR_SCALE_DATA
};

typedef enum
{
    GLS_TICK_ANCHOR_TOP,
    GLS_TICK_ANCHOR_BOTTOM,
    GLS_TICK_ANCHOR_CENTER
} GlsTickAnchor;

class GlsLinearScaleData
{
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        startingOffset; /**< Start offset in logical units */
    float        interval;       /**< Interval between ticks in logical units */
    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*/

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

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

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

    ~GlsLinearScaleData( void )
    {
    }

    bool GLSGEN_GLSLINEARSCALE_EXPORT operator==( const GlsLinearScaleData& right ) const;

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

    void GLSGEN_GLSLINEARSCALE_EXPORT InitMetaData( void );

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

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

#define GLS_LINEAR_SCALE_MAX 5

typedef GlsLinearScaleData GlsLinearScaleDataArray[ GLS_LINEAR_SCALE_MAX ];

#ifdef GLES
class GlsGloFileAttribute;
#endif

/** Runtime implementation of a GlsLinearScale */
class GlsLinearScale : public GLPolygon
{
    friend class GlsLinearScaleEditor;

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

public:
    typedef GLPolygon _BaseClass;

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

    GLSGEN_GLSLINEARSCALE_EXPORT GlsLinearScale( const GlsLinearScale& that, const bool generateNames );

    /** Destructs a GlsLinearScale object */
    virtual GLSGEN_GLSLINEARSCALE_EXPORT ~GlsLinearScale();

    static GLSGEN_GLSLINEARSCALE_EXPORT DisplayObject* CreateInstance();

    virtual GLSGEN_GLSLINEARSCALE_EXPORT void SetAvailableAttributes( unsigned int value );

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

    virtual GLSGEN_GLSLINEARSCALE_EXPORT void CopyProperties( DisplayObject* src );

    virtual GLSGEN_GLSLINEARSCALE_EXPORT void CopyGeometry( DisplayObject* srcArg );

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

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

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

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

    virtual GLSGEN_GLSLINEARSCALE_EXPORT void SetColor( const GlsColor& color );

    //////////////////////////////////////////////////
    // GlsLinearScale 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_GLSLINEARSCALE_EXPORT void SetScale( int index, const GlsLinearScaleData& data );

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

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

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

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

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

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

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

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

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

    /** Gets the tick anchor for this scale
      * \return The tick anchor for this scale
      */
    GLSGEN_GLSLINEARSCALE_EXPORT GlsTickAnchor TickAnchor( void ) { return _tickAnchor; }

    /** Sets the tick anchor for this scale
      * \param val  New tick anchor
      */
    GLSGEN_GLSLINEARSCALE_EXPORT void TickAnchor( const GlsTickAnchor val );

#ifdef GLES
    /** Causes the VBO for this object to be recomputed */
    GLSGEN_GLSLINEARSCALE_EXPORT void InvalidateGeometry( void ) { _geometryRefresh = true; }
#endif

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

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

    /** Causes the display list for this object to be recomputed */
    GLSGEN_GLSLINEARSCALE_EXPORT void InvalidateGeometry( void ) { _displayList.Invalidate(); }

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

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

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

    /** Recomputes the object's vertices and its radii */
    void UpdateScaleData( void );

    /** Determines if a tick with the given offset 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 currentOffset );

#ifdef GLES
    /** 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
      * \param color           The color of the scale
      */
    void DrawScale( int i, float haloLength, float haloThickness, GlsColor& color );
#else
    /** 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
      */
    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_GLSLINEARSCALE_EXPORT void SetFromGloData( GlsGloFileAttribute& data );
#endif

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

    /** Two radius vectors that are used to define the orientation of the scale */
    Vector _radii[ 2 ];

    /** Normalized radius vectors, cached because they are needed often */
    Vector _radiiNormalized[ 2 ];

    /** The particulars of each scale */
    GlsLinearScaleDataArray _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;

    /** Anchor to determine where ticks will draw */
    GlsTickAnchor _tickAnchor;

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

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

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

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

} // namespace disti

#endif