gls_ellipse.h

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

  \par Copyright Information

  Copyright (c) 2017 by The DiSTI Corporation.<br>
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  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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*/
#ifndef _GLSELLIPSE_H
#define _GLSELLIPSE_H
#include "glpolygon.h"
#include "gls_cpp_lang_support.h"

#ifdef GLES
#    include "gls_index_array.h"
#    include "gls_vertex_array.h"
#else
#    include "gls_display_list.h"
#endif
//////////////////// Provides support for creating DLLs ////////////////////////
#if( defined( GLSGEN_EXPORT_GLSELLIPSE ) || defined( GLSGEN_IMPORT_GLSELLIPSE ) || defined( GLS_EXPORT_GENERATED ) || defined( GLS_IMPORT_GENERATED ) ) \
    && defined( _MSC_VER )
#    if defined( GLSGEN_EXPORT_GLSELLIPSE ) || defined( GLS_EXPORT_GENERATED )
#        define GLSGEN_GLSELLIPSE_EXPORT __declspec( dllexport )
#    else
#        define GLSGEN_GLSELLIPSE_EXPORT __declspec( dllimport )
#    endif
#else
#    define GLSGEN_GLSELLIPSE_EXPORT
#endif
///////////////////////////////////////////////////////////////////////////////

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

namespace disti
{
// SetValue enumerations
enum
{
    GLS_ELLIPSE_FIRST_VALUE = GLS_LAST_INITIALIZER + 1,
    GLS_ELLIPSE_RADII,
    GLS_ELLIPSE_THICKNESS,
    GLS_ELLIPSE_SOLID,
    GLS_ELLIPSE_INTERVAL,
    GLS_ELLIPSE_START_ANGLE,
    GLS_ELLIPSE_END_ANGLE,
    GLS_ELLIPSE_COLOR
};

/** Runtime implementation of a GlsEllipse */
class GlsEllipse : public GLPolygon
{
    friend class GlsEllipseEditor;

public:
    typedef GLPolygon _BaseClass;

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

    // Copy Constructor
    GLSGEN_GLSELLIPSE_EXPORT GlsEllipse( const GlsEllipse& that, const bool generateNames );

    /** Destructs a GlsEllipse object */
    virtual GLSGEN_GLSELLIPSE_EXPORT ~GlsEllipse();

    static GLSGEN_GLSELLIPSE_EXPORT DisplayObject* CreateInstance();

    virtual GLSGEN_GLSELLIPSE_EXPORT void SetAvailableAttributes( unsigned int value );

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

    virtual GLSGEN_GLSELLIPSE_EXPORT void CopyProperties( DisplayObject* src );
    virtual GLSGEN_GLSELLIPSE_EXPORT void CopyGeometry( DisplayObject* srcArg );

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

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

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

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

    /* Unhides base class implementation. */
    using _BaseClass::SetFillColor;

    /* Unhides base class implementation. */
    using _BaseClass::GetFillColor;

    /** Sets the color for filling the object
      * \param color  The new color for the object
      */
    virtual GLSGEN_GLSELLIPSE_EXPORT void SetFillColor( const GlsColor& color );

    /** Gets the color for filling the object
      * \return  The fill color for the object
      */
    virtual GLSGEN_GLSELLIPSE_EXPORT GlsColor GetFillColor( void );

    DisplayObject* handle( DisplayEvent* ev );

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

    /* GlsEllipse does not use texture inheritance */
    virtual GLSGEN_GLSELLIPSE_EXPORT bool SetupTexture( void );

    //////////////////////////////////////////////////
    // GlsEllipse specific operations
    //////////////////////////////////////////////////

    /** Sets the radius vectors
      * \param r1
      * \param r2
      */
    virtual GLSGEN_GLSELLIPSE_EXPORT void RadiusVectors( const Vector& r1, const Vector& r2 );

    /** Gets the radius vector
      * \param index
      */
    virtual GLSGEN_GLSELLIPSE_EXPORT Vector RadiusVector( unsigned int index );

    /** Gets the unit vector
      * \param index
      */
    virtual GLSGEN_GLSELLIPSE_EXPORT Vector UnitVector( unsigned int index );

    /** Sets the angular interval between vertices
      * \param value the interval in degrees.
      */
    virtual GLSGEN_GLSELLIPSE_EXPORT void Interval( const unsigned int& value );
    /** Gets the angular interval between vertices.
      * \return the interval.
      */
    virtual GLSGEN_GLSELLIPSE_EXPORT unsigned int Interval();

    /** Sets the thickness of the ellipse in logical units.
      * \param value The thickness in logical units.
      */
    virtual GLSGEN_GLSELLIPSE_EXPORT void Thickness( const float& value );
    /** Gets the thickness of the ellipse.
      * \return The current thickness of the ellipse in logical units.
      */
    virtual GLSGEN_GLSELLIPSE_EXPORT float Thickness();

    /** Sets the Start Angle in degrees 
      * \param value The start angle
      */
    virtual GLSGEN_GLSELLIPSE_EXPORT void StartAngle( const float& value );
    /** Gets the Start Angle in degrees
      * \return The start angle in degrees
      */
    virtual GLSGEN_GLSELLIPSE_EXPORT float StartAngle();

    /** Sets the end angle in degrees
      * \param value The end angle in degrees
      */
    virtual GLSGEN_GLSELLIPSE_EXPORT void EndAngle( const float& value );
    /** Gets the end angle in degrees
      * \return The end angle in degrees
      */
    virtual GLSGEN_GLSELLIPSE_EXPORT float EndAngle();

    /** Sets the magnitude
      */
    virtual GLSGEN_GLSELLIPSE_EXPORT void Magnitude( const float& value, unsigned int index );
    /** Gets the magnitude
      */
    virtual GLSGEN_GLSELLIPSE_EXPORT float Magnitude( unsigned int index );

    /** Sets the solid flag
      * \param value When true the elipse is drawn solid
      */
    virtual GLSGEN_GLSELLIPSE_EXPORT void Solid( const bool& value );
    /** Gets the solid flag
      * \return The current solid flag value
      */
    virtual GLSGEN_GLSELLIPSE_EXPORT bool Solid();

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

    /** Returns a reference to this object's display list */
    GLSGEN_GLSELLIPSE_EXPORT GlsDisplayList& DisplayList( void ) { return _displayList; }
#endif
protected:
    /** Calculates _radiiUnit and _magnitude based on _radii */
    void CalculateRadiiUnit( void );

    /** callback called when the ellipse needs to be recalculated because an attribute has changed 
      */
    void SetNeedsRecalculate( void );

#ifdef GLES
    /** Draws the arc segment mode 
      * \param textureObject TRUE if object should be drawn textured
      */
    void ComputeArcSegment( bool textureObject );

    /** Draws the solid circle mode
      * \param textureObject TRUE if object should be drawn textured
      */
    void ComputeSolidCircle( bool textureObject );

    /** Set a single attribute from the GLO file.
     * \param data The attribute to set and its associated data.
     */
    virtual GLS_EXPORT void SetFromGloData( GlsGloFileAttribute& data );
#else
    /** Draws the arc segment mode 
      * \param textureObject TRUE if object should be drawn textured
      */
    void DrawArcSegment( bool textureObject );

    /** Draws the solid circle mode
      * \param textureObject TRUE if object should be drawn textured
      */
    void DrawSolidCircle( bool textureObject );

    /** Performs OpenGL drawing commands */
    void           DrawGeometry( void );
#endif
    /** Recomputes the object's vertices from its radii */
    void RecomputeVertices( void );

    /** Calculates the start vertices */
    void CalculateStartVertices( void );

    /** Calculates the end vertices */
    void CalculateEndVertices( void );

    /** Gets starting and ending indices for vertices */
    void         GetSegmentIndices( const float startAngle, unsigned int& startIndex, const float endAngle, unsigned int& endIndex );
    unsigned int InnerIndex( const unsigned int index );
    unsigned int OuterIndex( const unsigned int index );

#ifndef GLES
    /** Stores the scale in a display list for faster drawing */
    GlsDisplayList _displayList;
#else
    GlsVertexArray _outlineVertexArray;
#endif
    /** Stores the scale in a display list for faster drawing */
    Vector _radii[ 2 ], /**  Two radii defining the ellipse size and orientation 
                                    *  Only used to read/write file.  _radiiNormal is in control
                                    */

        _normal,         /**< Normal to surface defined by radii */
        _radiiUnit[ 2 ], /**< Unit vector of radii */
        _start[ 2 ],     /**< Two points defining the starting edge of a partial ellipse. */
        _startTex[ 2 ],  /**< Texture coordinates of starting points */
        _end[ 2 ],       /**< Two points defining the ending edge of a partial ellipse. */
        _endTex[ 2 ],    /**< Texture coordinates of starting points */
        _centerTex;      /**< Texture coordinate of center point */

    GlsColor _objectColor; /**< Fill color of object */

    float _thickness,    /**< Thickness of the outer edge of the ellipse in logical units */
        _startAngle,     /**< Starting angle of ellipse segment in degrees */
        _endAngle,       /**< Ending angle of ellipse segment in degrees */
        _magnitude[ 2 ]; /**< Magnitude of radii */

    unsigned int _interval; /**< Interval between subdivisions, in degrees */
    bool         _solid;    /**< If true, ellipse drawn as solid not as "donut" */
    bool         _needsRecalculate;

    GlsMatrixType _world2tex; /**< Matrix used to calculate texture coordinates for the object */

private:
    // disallow implicit assignments and copy constructor
    GlsEllipse& operator=( const GlsEllipse& ) DISTI_SPECIAL_MEM_FUN_DELETE;
    GlsEllipse( const GlsEllipse& ) DISTI_SPECIAL_MEM_FUN_DELETE;
};

} // namespace disti

#endif