gls_linear_scale.h

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

  \par Copyright Information

  Copyright (c) 2015 by The DiSTI Corporation.<br>
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  <br>
  All rights reserved.<br>

  This Software contains proprietary trade secrets of DiSTI and may not be
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Derivative Works based on this or other copyrighted DiSTI Software.

  NO WARRANTY. THE SOFTWARE IS PROVIDED "AS-IS," WITHOUT WARRANTY OF ANY KIND,
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AND CONDITIONS, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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  LIMITATION OF LIABILITY. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW,
IN NO EVENT SHALL DISTI OR ITS SUPPLIERS BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
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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