display.h

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

  \par Copyright Information

  Copyright (c) 2017 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,
AND ANY USE OF THIS SOFTWARE PRODUCT IS AT YOUR OWN RISK. TO THE MAXIMUM EXTENT
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  LIMITATION OF LIABILITY. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW,
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*/
#ifndef INCLUDED_DISTI_DISPLAY_H
#define INCLUDED_DISTI_DISPLAY_H

#include "cull.h"
#include "display_types.h"
#include "disti_metadata.h"
#include "dynamic_array.h"
#include "editor_object_base.h"
#include "gls_gl.h"
#include "gls_matrix_affine.h"
#include "gls_painter.h"
#include "util.h"
#include "vertex.h"
#include "weak_referenceable_mixin.h"

#ifdef GLES
#    include "gls_state_manager.h"
#endif

/** \namespace disti
  * Contains GL Studio classes and other DiSTI code.
  */
namespace disti
{
// Forward declarations
class DisplayObject;
class DisplayFrame;
class Group;
class DisplayEvent;
class TexturePalette;
class CallbackMethodCallerBase;
class GlsResourceFilter;
class DisplayObjectEditor;
class Culler;
#ifdef GLES
class GlsGloFile;
class GlsGloFileAttribute;
#endif

// Call this to unlock the GL Studio Runtime library.
// It must be called before any DisplayObject is constructed.
GLS_EXPORT void InitializeLibrary( const char* unlockString = NULL, const DisplayFrame* frame = NULL, bool checkLicense = false );

// Returns a string with the name of the company which
// was passed in inside the unlockString of InitializeLibrary().
// Do not free the returned pointer
GLS_EXPORT const char* LicenseUnlockedBy();

typedef DisplayObject*                 DisplayObjectPtr;
typedef DynamicArray<DisplayObjectPtr> DisplayObjectArray;
typedef DynamicArray<int>              DynamicIntArray;

/** \class DisplayObject
    Base Class for all graphical objects. It is an abstract class. Each
    object drawn in the editor will have a corresponding object.  All drawn objects
    are derived from this class.
*/

class DisplayObject : virtual public AttributeChangedNotifier
    , virtual public WeakReferenceableMixin
{
    friend class DisplayObjectEditor;

public:
    /** The default constructor for display objects.  Generally invoked
      * by constructors of derived classes. 
      * \param x  X coordinate of object location
      * \param y  Y coordinate of object location
      * \param z  Z coordinate of object location
      */
    GLS_EXPORT DisplayObject( float x, float y, float z );

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

    /** Virtual destructor for display object */
    virtual GLS_EXPORT ~DisplayObject( void );

    /** Call this to delete objects, as it handles special cases
      * like cleanup of LiveComponents.*/
    GLS_EXPORT void Destroy();

#ifndef GLES
    static GLS_EXPORT InterfaceListType* StaticGetCppInterfaceDescription( InterfaceListType* addToThisList = NULL );
#endif
    /** Sets and retrieves the current setting used for determining what attributes get
      * created for each object.*/
    typedef enum
    {
        GLS_ATTRIBUTES_BASIC       = 1,
        GLS_ATTRIBUTES_DYNAMIC     = 2,
        GLS_ATTRIBUTES_APPEARANCE  = 4,
        GLS_ATTRIBUTES_GEOMETRY    = 8,
        GLS_ATTRIBUTES_SPECIALIZED = 16,
        GLS_ATTRIBUTES_ALL         = ~0,
        GLS_ATTRIBUTES_NONE        = 0
    } AvailableAttributesEnum;

    /** Specifies which attributes are available for the object.
      * Currently the available attributes cannot be changed after they have been set.
      * (Only the first call has an effect.)
      * \param value A bitfield specifying which types of attributes to make available.
      * \sa AvailableAttributesEnum
      */
    virtual GLS_EXPORT void SetAvailableAttributes( unsigned int value );

    /** Set the alpha mode state for this object
      * \param mode which alpha mode to use when drawing 
      * \sa AlphaMode_e
      */
    virtual GLS_EXPORT void AlphaMode( int mode );

    /** Get the alpha mode for this object
      * \return Whether or not alpha testing or blending is enabled when drawing
      * \sa AlphaMode_e
      */
    virtual GLS_EXPORT int AlphaMode( void );

    /** Get the anti aliasing state this object
      * \return Whether or not this object will be drawn antialiased
      */
    virtual GLS_EXPORT bool AntiAlias( void );

    /** Set the anti aliasing state for this object
      * \param alias  Whether or not to perform anti aliasing
      */
    virtual GLS_EXPORT void AntiAlias( bool alias );

    /** Second half of texture setup.  Applies texture modes like modulate, decal, etc.
      * \param textureIndex  Index of the texture to apply
      */
    GLS_EXPORT void ApplyTextureSettings( int textureIndex = -1 /* will use _textureIndex by default */ );

    /** Gets the full list of attributes for this object
      * \return A reference to the attribute dictionary in this object
      */
    inline DistiAttribDict&       Attributes() { return *_attribDict; };
    inline const DistiAttribDict& Attributes() const { return *_attribDict; };

    /** Sets the texture blend color for the object 
      * \param color A GlsColor
      */
    virtual GLS_EXPORT void SetBlendColor( const GlsColor& color );

    /** Gets the texture blend color for the object
      * \param color Filled in with RGBA (0-255 range)
      * NOTE: Not Virtual.  Simply calls void GetBlendColor(const GlsColor& color);
      */
    GLS_EXPORT void GetBlendColor( unsigned char color[] );

    /** Gets the texture blend color for the object
      * \param r Returns red color component (0-255 range)
      * \param g Returns Green color component (0-255 range)
      * \param b Returns Blue color component (0-255 range)
      * \param a Returns Alpha color component (0-255 range)
      * NOTE: Not Virtual.  Simply calls void GetBlendColor(const GlsColor& color);
      */
    GLS_EXPORT void GetBlendColor( unsigned char& r, unsigned char& g, unsigned char& b, unsigned char& a );

    /** Gets the texture blend color for the object
      * \return Returns the current texture blend color.
      */
    virtual GLS_EXPORT GlsColor GetBlendColor();

    /** Sets the texture blend color for the object
      * \param color  RGBA color (0-255 range)
      * NOTE: Not Virtual.  Simply calls void SetBlendColor(const GlsColor& color);
      */
    GLS_EXPORT void SetBlendColor( unsigned char color[] );

    /** Sets the texture blend color for the object
      * \param r Red color component (0-255 range)
      * \param g Green color component (0-255 range)
      * \param b Blue color component (0-255 range)
      * \param a Alpha color component (0-255 range)
      * NOTE: Not Virtual.  Simply calls void SetBlendColor(const GlsColor& color);
      */
    GLS_EXPORT void SetBlendColor( unsigned char r, unsigned char g, unsigned char b, unsigned char a );

    /** Determines if the object is blinked on or off */
    GLS_EXPORT bool BlinkedOff( void );

    /** Get the blinking state this object
      * \return Whether or not this object is blinking    
      */
    virtual GLS_EXPORT bool Blinking( void );

    /** Set the blinking state for this object
      * \param blink  Whether or not to blink this object
      */
    virtual GLS_EXPORT void Blinking( const bool blink );

    /** Get the blinking rate this object
      * \return The rate at which this object is blinking
      */
    virtual GLS_EXPORT float BlinkRate( void );

    /** Set the blinking rate for this object
      * \param rate  Number of times per second to blink this object
      */
    virtual GLS_EXPORT void BlinkRate( const float rate );

    /** Sets whether the application should use the system time or a manual time
      * for calculating the blink state of objects
      */
    static GLS_EXPORT void UseManualBlinkElapsedTime( bool useManualTime );

    /** Sets the time the application will use to determine the blink state of
      * objects.  Has no effect if UseManualBlinkElapsedTime was not set to true.
      */
    static GLS_EXPORT void SetManualBlinkElapsedTime( double elapsedTime );

    /** Get the current bounding volume center 
      * \return The current bounding volume center
      */
    inline const Vector& BoundingVolumeCenter() const { return _boundingVolumeCenter; }

    /** Set the current bounding volume center 
      * \param center The new center
      */
    void GLS_EXPORT BoundingVolumeCenter( const Vector& center );

    /** Determines if the given ray hits this bounding volume
      * \param start     Starting point of the ray
      * \param direction Direction vector of the ray
      * \return  True if this bounding volume hit by the ray
      */
    bool GLS_EXPORT BoundingVolumeHit( const Vector& start, const Vector& direction );

    /** Get the bounding sphere radius
      * \return The bounding sphere radius
      */
    inline float BoundingVolumeRadius() const { return _boundingVolumeRadius; }

    /** Set the bounding sphere radius
      * \param radius The bounding sphere radius
      */
    void GLS_EXPORT BoundingVolumeRadius( float radius );

    /** Provides a mechanism for performing regular calculations, seperate 
      * from drawing.  In a standalone applicaton Calculate is recursively 
      * called by the main loop before the objects are drawn.
      * \param  time The elaspsed time in seconds since program start
      */
    virtual GLS_EXPORT void Calculate( double time );

    /** Calculates where the pick vector hit this object 
      * \param pickLoc  Start of the pick vector
      * \param directionVector  Direction of the pick vector
      * \param collisionPoint  Returns the collision point
      */
    GLS_EXPORT void CalculateCollisionPoint( const Vector& pickLoc, const Vector& directionVector, Vector* collisionPoint );

    /** Calculates the bounding box of the parent group object.
      */
    virtual GLS_EXPORT void CalculateParentBoundingBox( void );

    /** Recalculates the texture coordinates for the object based on the TexturePoints.
      */
    virtual GLS_EXPORT void CalculateTextureCoordinates( void );

    /** Converts the object's texture points into a transformation matrix
      * for use in calculating the object's texture coordinates
      */
    GLS_EXPORT bool GetTexturePointTransformationMatrix( GlsMatrixType& world2tex );

    /** \return The current callback method for this object */
    inline CallbackMethodCallerBase* CallbackCaller() const { return _callbackCaller; }

    /** Sets the callback method for this object.  cb MUST be dynamically allocated since
    * memory management will be passed to this display object.  cb will be deleted when
    * a new callback is registered via this method or when the display object is
    * destructed.
    * \param cb The new callback method for this object 
    */
    GLS_EXPORT void CallbackCaller( CallbackMethodCallerBase* cb );

    /** Gets the location of the center of the object in logical units.  Value is based on the 
      * extents of the object and does not take into consideration dynamic rotation
      * \param center  Will contain the center coordinate on return
      */
    virtual GLS_EXPORT void GetCenter( Vector& center );

    /** Copy+Create operation in one method. In derived classes, this
      * method will create a new instance of the derived class and then
      * copy the object into the new instance. The cut,copy,paste and undo
      * operations use this method.
      * \param generateNames  Whether or not to generate new names for cloned objects
      * \return A new object, identical to the original, except for the instance name
      */
    virtual DisplayObject* CloneObject( bool generateNames = false ) = 0;

    /** Gets the color for the object outline
      * \return The outline color
      */
    virtual GLS_EXPORT GlsColor GetColor();

    /** Gets the RGBA color for the object outline
      * \param c4  Gets the RGBA line color (0-255 range) for the object
      * NOTE: Not Virtual.  Simply calls void GetColor(const GlsColor& color)
      */
    GLS_EXPORT void GetColor( unsigned char c4[] );

    /** Gets the RGBA color for the object outline
      * \param r  Gets the red component (0-255 range) of the line color for the object
      * \param g  Gets the blue component (0-255 range) of the line color for the object
      * \param b  Gets the green component (0-255 range) of the line color for the object
      * \param a  Gets the alpha component (0-255 range) of the line color for the object
     * NOTE: Not Virtual.  Simply calls void GetColor(const GlsColor& color)
      */
    GLS_EXPORT void GetColor( unsigned char& r, unsigned char& g, unsigned char& b, unsigned char& a );

    /** Sets the RGBA color for the object outline
      * \param color The new color 
      */
    virtual GLS_EXPORT void SetColor( const GlsColor& color );

    /** Sets the RGBA color for the object outline
      * \param c4  The new RGBA (0-255 range) line color for the object
      * NOTE: Not Virtual.  Simply calls void SetColor(const GlsColor& color)
      */
    inline void SetColor( unsigned char c4[] ) { SetColor( GlsColor( c4 ) ); }

    /** Sets the RGBA color for the object outline
      * \param r  The new red component (0-255 range) of the line color for the object
      * \param g  The new blue component (0-255 range) of the line color for the object
      * \param b  The new green component (0-255 range) of the line color for the object
      * \param a  The new alpha component (0-255 range) of the line color for the object
      * NOTE: Not Virtual.  Simply calls void SetColor(const GlsColor& color)
      */
    inline void SetColor( unsigned char r, unsigned char g, unsigned char b, unsigned char a ) { SetColor( GlsColor( r, g, b, a ) ); }

    /** Copies the geometry information from one object to another. Used by
      * the undo mechanism to allow user to undo a geometry change.
      * \param src   The object to copy geometry from */
    virtual GLS_EXPORT void CopyGeometry( DisplayObject* src );

    /** Copies the hierarchy information from one object to another
      * \param src  The object to copy from
      * \param copyName  Whether or not to copy the object name
      */
    virtual GLS_EXPORT void CopyHierarchyProperties( DisplayObject* src, bool copyName );

    /** Copies the attributes except for geometry attributes from one object
      * to another. Used by the undo mechanism to undo most attribute change
      * operations.
      * \param src   The object to copy properties from */
    virtual GLS_EXPORT void CopyProperties( DisplayObject* src );

#ifndef GLES
    /** Get the details of the Cpp Interface
      * The actual interface is exposed in compiled code.
      * \param addToThisList If not NULL this list will be added to then returned.  If NULL a new list will be created.
      * \return A templated list.  
      * The caller must call the corresponding free method to
      * safely free the memory.
      */
    virtual GLS_EXPORT InterfaceListType* GetCppInterfaceDescription( InterfaceListType* addToThisList = NULL );

    /** Frees the memory allocated by a previous call to GetCppInterfaceDescription
      * \param array  Memory allocated by a previous call to GetCppInterfaceDescription
      */
    virtual GLS_EXPORT void GetCppInterfaceDescriptionFree( InterfaceListType* array );
#endif

    /** Sets if back faces should be removed 
      * \param val True if back faces should be removed
      */
    virtual GLS_EXPORT void CullBackFace( const bool val );

    /** Returns if back faces should be removed 
      * \return True if backfaces are removed 
      */
    virtual GLS_EXPORT bool CullBackFace( void );

    /** Whether or not this object is currently culled */
    inline bool Culled() const { return _culled; }
    inline void Culled( bool val ) { _culled = val; }

    /** This is the cull test normally performed within PreDraw()
      * \param matrix transformation from vertices to the frustrums coordinate system
      * \param culler Culler to perform the test
      */
    inline bool CullTest( const GlsMatrixType* matrix, const Culler& culler )
    {
        // Make some vectors representing a unit sphere
        Vector loc( _boundingVolumeCenter + _location );
        Vector i( loc );
        Vector j( loc );
        Vector k( loc );

        i.x += 1.0f;
        j.y += 1.0f;
        k.z += 1.0f;

        // Transform into the frustrums coordinate system
        matrix->Transform( loc );
        matrix->Transform( i );
        matrix->Transform( j );
        matrix->Transform( k );

        // Subtract the location to get the radius vectors
        i -= loc;
        j -= loc;
        k -= loc;

        // Find the largest radius of the transformed sphere
#ifdef SUNOS
        float maxRadius = sqrt( MAX( i.MagnitudeSquared(), MAX( j.MagnitudeSquared(), k.MagnitudeSquared() ) ) );
#else
        float maxRadius = sqrtf( MAX( i.MagnitudeSquared(), MAX( j.MagnitudeSquared(), k.MagnitudeSquared() ) ) );
#endif
        return culler.SphereOutsideFrustum( loc, maxRadius * _boundingVolumeRadius );
    }

    /** Gets the objects Dynamic Coordinate System (DCS) Matrix
      * \return A reference to the Dcs Matrix stored in the object
      */
    GlsMatrixType& DcsMatrix() { return _dcsMatrix; } // deprecated
    GlsMatrixType  DcsMatrix() const { return _dcsMatrix; }

    /** Sets the dcs matrix
      * \param matrix the dcs matrix
      */
    void GLS_EXPORT DcsMatrix( const GlsMatrixType& matrix );

    /** Remove the Vertex at \a index. */
    virtual GLS_EXPORT void DeleteVertexAt( unsigned int index );

    /** Remove the Vertex at (indexAfter - 1).
      * \param indexAfter One past the index to delete. If it is beyond the number of vertices or 
      *                   is 0, the vertices will be unchanged.
      * \deprecated User code should use DeleteVertexAt() instead. 
      * \note This virtual function is kept for backwards compatibility only. It is marked 'final' 
      *       (where supported). Subclasses should override DeleteVertexAt() instead.
      */
    DISTI_DEPRECATED( "User code should use DeleteVertexAt()." )
    virtual GLS_EXPORT void DeleteVertex( unsigned int indexAfter ) DISTI_FINAL
    {
        if( indexAfter > 0 )
        {
            DeleteVertexAt( indexAfter - 1 );
        }
    }

    /** Get the z buffering state for this object
      * \return Whether or not this object will be draw Z buffered
      */
    virtual GLS_EXPORT int DepthTest( void );

    /** Set the z buffering state for this object
      * \param zbuf  Whether or not to perform z buffering
      */
    virtual GLS_EXPORT void DepthTest( unsigned char zbuf );

    /** Draws this object on the current display frame (_parent member).
        Pure virtual method */
    virtual void Draw( void ) = 0;

    /** \returns This object's _drawMatrix (it's contribution to the ModelMatrix)
      * or NULL if the object does not have a _drawMatrix.
      */
    inline const GlsMatrixType* DrawMatrix() { return _drawMatrix; }

    /** \returns True if the draw matrix needs to be calculated 
      */
    inline bool NeedCalcDrawMatrix() { return _needCalcDrawMatrix; }

    /** Sets the dynamic rotation to the specified value for the specified axis (in degrees)
      * \param angle The new dynamic rotation angle for the object
      * \param axis The axis to change
      * NOTE: Not virtual
      */
    GLS_EXPORT void DynamicRotate( float angle, int axis );

    /** Sets the dynamic rotation to the specified value for all axes (in degrees)
      * \param v Vector containing the new dynamic rotation angles for each axis
      */
    GLS_EXPORT void DynamicRotate( const Vector& v );

    /** Sets the dynamic rotation to the specified value for all axes (in degrees)
      * \param angle Array of three floats containing the new dynamic rotation angles for each axis
      */
    GLS_EXPORT void DynamicRotate( float angle[] );

    /** Sets the dynamic rotation to the specified value for all axes (in degrees)
      * \param  x The new dynamic rotation angle for the X axis
      * \param  y The new dynamic rotation angle for the Y axis
      * \param  z The new dynamic rotation angle for the Z axis
      * NOTE: Is virtual.  If needed overload this method.
      */
    virtual GLS_EXPORT void DynamicRotate( float x, float y, float z );

    /** Changes the dynamic rotation by the specified value for the specified axis (in degrees)
      * \param angle The change in dynamic rotation angle for the object
      * \param axis  The axis to change
      */
    virtual GLS_EXPORT void DynamicRotateRelative( float angle, int axis );

    /** Gets the dynamic rotation to the specified value for
      * the specified axis. 
      * \param axis The axis to get the rotation from 
      * \return The dynamic rotation angle for the axis (in degrees)
      */
    virtual GLS_EXPORT float DynamicRotation( int axis );
    virtual GLS_EXPORT Vector DynamicRotation();

    /** Returns the dynamic scale values in a Vertex
      * \return The dynamic scale values
      * NOTE: Not virtual
      */
    virtual GLS_EXPORT Vector DynamicScale();

    /** Sets the dynamic scale values for an object.
      * \param x X scale
      * \param y Y scale
      * \param z Z scale
      */
    virtual GLS_EXPORT void DynamicScale( float x, float y, float z );

    /** Sets the dynamic scale values for an object.
      * \param scale The new dynamic scale for the object
      */
    GLS_EXPORT void DynamicScale( const Vector& scale );

    /** Sets the dynamic translation to the specified value for all axes (in logical units)
      * \note Make sure to pass float values for x,y,z here, 
              or the compiler may choose an unexpected method signature. 
      * \sa DynamicTranslate(float, int, bool)
      * \param  x The new dynamic translation for the X axis
      * \param  y The new dynamic translation for the Y axis
      * \param  z The new dynamic translation for the Z axis
      * \param  relative If true will add to existing dynamic translation
      */
    virtual GLS_EXPORT void DynamicTranslate( float x, float y, float z, bool relative = false );

    /** Sets the dynamic translation to the specified value for all axes (in logical units)
      * \param  amount The new dynamic translation for the X, Y, and Z axes
      * \param  relative If true will add to existing dynamic translation
      * NOTE: Not virtual
      */
    GLS_EXPORT void DynamicTranslate( const Vertex& amount, bool relative );

    /** Sets the dynamic translation to the specified value for all axes (in logical units).  Equivalent to DynamicTranslate( amount, false );
      * \param  amount The new dynamic translation for the X, Y, and Z axes
      * NOTE: Not virtual
      */
    GLS_EXPORT void DynamicTranslate( const Vector& amount );

    /** Sets the dynamic translation to the specified value for the specified axis
      * \param  amount The new dynamic translation for the axis
      * \param  axis Z_AXIS, Y_AXIS, or X_AXIS
      * \param  relative If true will add to existing dynamic translation
      */
#ifdef GLES
    virtual GLS_EXPORT void DynamicTranslateAxis( float amount, int axis, bool relative );
#else
    virtual GLS_EXPORT void DynamicTranslate( float amount, int axis, bool relative = false );
#endif
    /** Returns the current dynamic translation for the specified axis
      * \param axis Z_AXIS, Y_AXIS, or X_AXIS
      * \returns the translation
      */
    virtual GLS_EXPORT float DynamicTranslation( int axis );

    /** Returns the current dynamic translation for all axes
      * \returns the translation
      */
    virtual GLS_EXPORT Vector DynamicTranslation();

    /** Used in the editor to access editor functionality.  Gets the editor object pointer.
     * USER CODE SHOULD NOT USE THIS METHOD!
     * \return Pointer to editor object.
     */
    GLS_EXPORT DisplayObjectEditor* Editor();

    /** Used in the editor to access editor functionality.  Gets the editor object pointer.
     * USER CODE SHOULD NOT USE THIS METHOD!
     * \return Pointer to editor object.
     */
    GLS_EXPORT const DisplayObjectEditor* Editor() const;

    /** Used in the editor to access editor functionality.  Sets the editor object pointer.
     * USER CODE SHOULD NOT USE THIS METHOD!
     * \param editor Pointer to editor object.
     */
    GLS_EXPORT void Editor( DisplayObjectEditor* editor );

    /** Figure out the static extents for the object.
      * Used by the editor as part of the pick operation and
      * for figuring out the size of groups.
      * \param x   Gets the minimum x extent
      * \param y   Gets the minimum y extent
      * \param z   Gets the minimum z extent
      * \param x1  Gets the maximum x extent
      * \param y1  Gets the maximum y extent
      * \param z1  Gets the maximum z extent
      */
    virtual GLS_EXPORT void GetExtents( float& x, float& y, float& z, float& x1, float& y1, float& z1 );

    /** Determines the static extents of geometry projected to the XY plane of the object's DCS.
      * \param min Returns the minimum values found in the traversal
      * \param max Returns the maximum values found in the traversal
      */
    GLS_EXPORT void GetExtentsDCS( Vector& min, Vector& max );

    /** Gets the RGBA color for filling the object
      * \param r  Gets the red component (0-255 range) of the fill color for the object
      * \param g  Gets the blue component (0-255 range) of the fill color for the object
      * \param b  Gets the green component (0-255 range) of the fill color for the object
      * \param a  Gets the alpha component (0-255 range) of the fill color for the object
      * NOTE: NOT Virtual Simply calls GlsColor GetFillColor()
      */
    GLS_EXPORT void GetFillColor( unsigned char& r, unsigned char& g,
        unsigned char& b, unsigned char& a );

    /** Gets the RGBA color for filling the object
      * \param c4  Gets the RGBA fill color (0-255 range) for the object
      * NOTE: NOT Virtual.  Simply calls GlsColor GetFillColor()
      */
    GLS_EXPORT void GetFillColor( unsigned char c4[] );

    /** Gets the fill color of the object
      * \return The fill color
      */
    virtual GLS_EXPORT GlsColor GetFillColor( void );

    /** Sets the RGBA color for filling the object
      * \param r  The new red component (0-255 range) of the fill color for the object
      * \param g  The new blue component (0-255 range) of the fill color for the object
      * \param b  The new green component (0-255 range) of the fill color for the object
      * \param a  The new alpha component (0-255 range) of the fill color for the object
      * NOTE: Not Virtual.  Simply calls void SetFillColor(const GlsColor& color)
      */
    inline void SetFillColor( unsigned char r, unsigned char g, unsigned char b, unsigned char a ) { SetFillColor( GlsColor( r, g, b, a ) ); }

    /** Sets the RGBA color for filling the object
      * \param c4  The new RGBA fill color (0-255 range) for the object
      * NOTE: Not Virtual.  Simply calls void SetFillColor(const GlsColor& color)
      */
    inline void SetFillColor( unsigned char c4[] ) { SetFillColor( GlsColor( c4 ) ); }

    /** Sets the RGBA color for filling the object
      * \param color  The new RGBA fill color (0-255 range) for the object
      */
    virtual GLS_EXPORT void SetFillColor( const GlsColor& color );

    /** Dynamically generate a name for the object, based on the current time
      */
    virtual GLS_EXPORT void GenerateInstanceName( void );

    /** Handles an event that is sent to the object.
      * \param ev  The event to send to the object
      * \returns   Which object handled the event
      */
    virtual GLS_EXPORT DisplayObject* handle( DisplayEvent* ev );

    /** Determines if the object is hit by a pick ray starting at (x,y,z) and pointing towards directionVector in object logical coordinate system.
      * If Pickable() == PICK_BEST it will return the closest point that was hit, otherwise it returns the first point that was hit.
      * This method should not pick points behind the viewer.
      *
      * \param x  X coordinate of pick ray start in logical coordinates.
      * \param y  Y coordinate of pick ray start in logical coordinates.
      * \param y  Y coordinate of pick ray start in logical coordinates.
      * \param z  Z coordinate of pick ray start in logical coordinates.
      * \param scale The scale factor of the window. Affects picking of outlines.  Standard value is 1.0.
      * \param directionVector  The direction of the pick ray.
      * \param collisionPoint If this method returns true, this Vector will contain the location that was hit in logical coordinates.
      * \return boolean indicating if the object was hit by the pick ray.
      */
    virtual GLS_EXPORT bool Hit( float x, float y, float z, float scale, const Vector& directionVector, Vector* collisionPoint );

    /** Determines if the object is hit by a pick ray starting at (x,y,z) and pointing towards directionVector in the object logical coordinate system
      * If Pickable() == PICK_BEST it will return the closest point that was hit, otherwise it returns the first point that was hit.
      * This method should not pick points behind the viewer.
      *
      * \param x  X coordinate of pick ray start in logical coordinates.
      * \param y  Y coordinate of pick ray start in logical coordinates.
      * \param y  Y coordinate of pick ray start in logical coordinates.
      * \param z  Z coordinate of pick ray start in logical coordinates.
      * \param scale The scale factor of the window. Affects picking of outlines.  Standard value is 1.0.
      * \param vertices An array of vertices describing the Object.
      * \param vertex_cnt Size of the vertices array.
      * \param directionVector  The direction of the pick vector.
      * \param collisionPoint If this method returns true, this Vector will contain the location that was hit in logical coordinates.
      * \return True if click is inside, false otherwise.
      *
      * Comment:   The hit determination algorithm is based on the principle
      *            that a point is inside a polygon if a line drawn through the
      *            point intersects an even number of edges.
      */
    virtual GLS_EXPORT bool HitUtil( float x, float y, float z, float scale, Vertex* vertices, unsigned int vertex_cnt, const Vector& directionVector, Vector* collisionPoint );

    /** Insert a vertex at \a index.  Duplicate the vertex pointed to
      * by \a index, so that there are two vertices that are exactly the same.
      * If \a index is greater than the number of vertices, then the last vertex is duplicated.
      */
    virtual GLS_EXPORT void InsertVertexAt( unsigned int index );

    /** Insert a new vertex into the vertex array, duplicating the vertex at (indexAfter - 1).
      * \param indexAfter One past the index to insert. The vertex before this (or the last vertex, 
      *                   if more than the number of vertices) will be duplicated. If 0, the 0th vertex
      *                   will be duplicated.
      * \deprecated New code should use InsertVertexAt().
      * \note This virtual function is kept for backwards compatibility only. It is marked 'final' 
      *       (where supported). Subclasses should override InsertVertexAt() instead.
      */
    DISTI_DEPRECATED( "User code should use InsertVertexAt()." )
    virtual GLS_EXPORT void InsertVertex( unsigned int indexAfter ) DISTI_FINAL
    {
        InsertVertexAt( indexAfter > 0 ? indexAfter - 1 : 0 );
    }

    /** Gets the name for the object.
      * \return The name of the object
      */
    GLS_EXPORT char*       InstanceName( void );
    GLS_EXPORT const char* InstanceName( void ) const;

    /** Sets the name for the object. This name corresponds to the name
      * that is generated in the source code.
      * \param name The new name for the object
      */
    GLS_EXPORT void InstanceName( const char* name );

    /** Gets the lighting state */
    virtual GLS_EXPORT bool LightingEnabled();

    /** Sets the lighting state */
    virtual GLS_EXPORT void LightingEnabled( bool lighting );

    /** Get the line stipple multiplier for this object
      * \return The line stipple multiplier for this object
      */
    virtual GLS_EXPORT int LineStippleMultiplier( void );

    /** Set the line stipple multiplier for this object
      * \param mult   The new line stipple pattern
      */
    virtual GLS_EXPORT void LineStippleMultiplier( int mult );

    /** Get the line stipple pattern for this object
      * \return The line stipple pattern for this object
      */
    virtual GLS_EXPORT int LineStipplePattern( void );

    /** Set the line stipple pattern for this object
      * \param pattern   The new line stipple pattern
      */
    virtual GLS_EXPORT void LineStipplePattern( int pattern );

    /** Gets the width of lines in the object.
      * \return  The line width of the object in logical units
      */
    virtual GLS_EXPORT float LineWidth( void );

    /** Sets the width of lines in the object.
      * \param width  The new line width of the object in logical units
      */
    virtual GLS_EXPORT void LineWidth( float width );

    /** \return  The location of the origin of the object
      * Lifetime is guaranteed to coincide with the DisplayObject's lifetime.
      */
    virtual GLS_EXPORT const Vertex& Location( void ) const;

    /** Sets the location of the origin of the object
      * \param v   The new location
      */
    virtual GLS_EXPORT void Location( const Vertex& v );

    /** Sets the location of the origin of the object
      * \param x X Coordinate of the new location
      * \param y Y Coordinate of the new location
      * \param z Z Coordinate of the new location
      */
    virtual GLS_EXPORT void Location( float x, float y, float z );

    /** Gets the location of the origin of the object
      * \param v   Will be filled in with the current location
      */
    virtual GLS_EXPORT void GetLocation( Vertex& v );

    /** Gets the location of the origin of the object
      * \param x   Will be filled in with the x coordinate
      * \param y   Will be filled in with the y coordinate
      * \param z   Will be filled in with the z coordinate
      */
    virtual GLS_EXPORT void GetLocation( float& x, float& y, float& z );

    /** \return X component of location */
    inline float X( void ) const { return Location().x; }

    /** \return Y component of location */
    inline float Y( void ) const { return Location().y; }

    /** \return Z component of location */
    inline float Z( void ) const { return Location().z; }

    /** Sets x component of location */
    inline void X( const float x ) { Location( x, Y(), Z() ); }

    /** Sets y component of location */
    inline void Y( const float y ) { Location( X(), y, Z() ); }

    /** Sets z component of location */
    inline void Z( const float z ) { Location( X(), Y(), z ); }

    /** Gets material index.  Returns -1 if multiple are applied. */
    virtual GLS_EXPORT int MaterialIndex();

    /** Sets the material index. */
    virtual GLS_EXPORT void MaterialIndex( int index );

    /** Gets a vector of material indices. */
    virtual GLS_EXPORT DynamicArray<int>& MaterialIndices();

    /** Sets the vector of material indices. */
    virtual GLS_EXPORT void MaterialIndices( DynamicArray<int> indices );

    /** \return The saved Model matrix, if any. Normally not used by the user.*/
    GLS_EXPORT GlsMatrixType* ModelMatrix();

    /** \return true if Calculate() needs to be called on this object */
    inline bool NeedCalculate() { return _needCalculate; }

    /** Gets the object's normals.
      * \return  Pointer to the object's normal vertex array
      */
    inline Vector* Normals() { return ( _normals ); }

    /** Sets the vertex normal data for this object
      * \param nPoints  The number of vertices in the object
      * \param vertices  The vertex normals for the object
      */
    virtual GLS_EXPORT void SetNormals( unsigned int nPoints, Vector* vertices );

    /** Sets the vertex normal data for this object
      * \param nPoints  The number of vertices in the object
      * \param ...  X,Y,Z for each vertex normal
      */
    GLS_EXPORT void VaSetNormals( unsigned int nPoints, ... );

    /** Gets the object's number of vertices.
      * \return  The integer number of vertices in the object
      */
    inline unsigned int NumberOfVertices() const { return ( _nVertices ); }

    /** Get the depth (in the Z Dimension) of the object in logical units.  Value is based on the 
      * extents of the object and does not take into consideration dynamic rotation
      * \return  The depth in logical units (based on extents in the Z Dimension)
      */
    virtual GLS_EXPORT float ObjectDepth( void );

    /** Get the height (in the Y Dimension) of the object in logical units.  Value is based on the 
      * extents of the object and does not take into consideration dynamic rotation
      * \return  The height in logical units (based on extents in the Y Dimension)
      */
    virtual GLS_EXPORT float ObjectHeight( void );

    /** Get the width (in the X Dimension) of the object in logical units.  Value is based on the 
      * extents of the object and does not take into consideration dynamic rotation
      * \return  The width in logical units (based on extents in the X Dimension)
      */
    virtual GLS_EXPORT float ObjectWidth( void );

    /** Redefines the frame of reference for the object.  Since the vertices in the object are 
      * specified relative to the _location member, this routine allows you to specify the 
      * absolute coordinate for _location and then recalculates the vertices to be relative to that 
      * new location
      * \param vert  The new origin point for the object
      */
    virtual GLS_EXPORT void SetOrigin( const Vertex& vert );

    /** Sets the parent display frame pointer for this object to the indicated display frame
      * \param par  The new display frame to be the parent object
      */
    virtual GLS_EXPORT void Parent( DisplayFrame* par );

    /** Gets the parent display frame pointer for this object
      * \return The parent display frame of this object
      */
    inline DisplayFrame* Parent( void ) const { return _parent; }

    /** Sets the parentGroup pointer for this object
      * \param group  The group to which this object belongs
      */
    virtual GLS_EXPORT void ParentGroup( Group* group );

    /** Gets the parentGroup pointer for this object
      * \return The group to which this object belongs
      */
    inline Group* ParentGroup( void ) const { return _parentGroup; }

    /** Attempts to pick an object in 3D and accounting for dynamic rotations and translations of this object or
      * parent objects. It also looks at the pickable status and attempts to return the "Best" pick if that is 
      * what is desired.
      *
      * Note: This method will pick objects in the scene based on a pick ray starting at winLoc and pointing into the screen.
      * It will not pick objects behind the depth specified by winLoc.z.  Typically winLoc.z should be set to 0 to ensure that
      * the pick ray starts at near clip plane.
      *
      * \param winLoc          Device coordinates for the mouse click.  Z value should be set to 0 to ensure pick ray starts at near clip plane.
      * \param logicalCoords   The start of the pick ray in logical coordinates.  Should be calculated from the winLoc using this->WindowToLogical(winLoc, logicalCoords, &directionVector).
      * \param scale           Current window scale. Affects picking radius of outlines.  Initial value should typically be 1.0.
      * \param directionVector The direction of the pick ray in logical coordinates.  Should be calculated from the winLoc using this->WindowToLogical(winLoc, logicalCoords, &directionVector).
      * \param collisionWinLoc  Returns where the pick vector intersects the object that is hit in device coordinates.
      * \param drawnMatrices   The matrices used to draw the object, including matrices set by parents that may have
      *                        dynamically rotated, translated or scaled this object.  Initial value should typically be a default OpenGLMatrices() object.
      *
      * \return  The object that was hit, or NULL if no object hit
      */
    virtual GLS_EXPORT DisplayObject* Pick3D( const Vector& winLoc,
        const Vector&                                       logicalCoords,
        float                                               scale,
        const Vector&                                       directionVector,
        Vector&                                             collisionWinLoc, /*Returned*/
        const OpenGLMatrices&                               drawnMatrices );

    /** Get the pickable state for this object
      * \return The pick mode
      * \sa PickableType_e
      */
    inline unsigned char Pickable() { return _pickable; }

    /** Set the pickable state for this object
      * \param pick The pick mode
      * \sa PickableType_e
      */
    virtual GLS_EXPORT void Pickable( unsigned char pick );

    /* Gets the polygon offset (Z buffer offset) for this object
      * \return mode The new polygon offset for this object
      * Currently unused.
      */
    virtual GLS_EXPORT int PolygonOffset( void ) const;

    /* Sets the polygon offset (Z buffer offset) for this object
      * \param mode The new polygon offset for this object
      * Currently unused.
      */
    virtual GLS_EXPORT void PolygonOffset( const int offset );

    /** Gets the polygon end mode (Open or Closed) for the polygon
      * \return Enumeration indicating open or closed mode
      * \sa PolygonClose_e
      */
    virtual GLS_EXPORT int PolygonEnd( void );

    /** Sets the polygon end mode (Open or Closed) for the polygon
      * \param end  Enumeration indicating open or closed mode
      * \sa PolygonClose_e
      */
    virtual GLS_EXPORT void PolygonEnd( const int end );

    /** Gets the polygon drawing mode for this object
      * \return The polygon drawing mode for this object
      * \sa PolygonMode_e
      */
    virtual GLS_EXPORT int PolygonMode( void );

    /** Sets the polygon drawing mode for this object
      * \param mode The new polygon drawing mode for this object
      * \sa PolygonMode_e
      */
    virtual GLS_EXPORT void PolygonMode( int mode );

    /** Traverses the hierarchy calculating the 
      * _modelMatrix, _projMatrix, _viewMatrix as needed.
      * \param current  Current matrices inherited from parent
      * \param culler   Object that possibly marks this object for culling
      */
    virtual GLS_EXPORT void PreDraw( const OpenGLMatrices& current, Culler& culler );

    /** \return The saved Projection matrix, if any. Normally not used by the user.
      */
    GLS_EXPORT GlsMatrixType* ProjMatrix();

    /** Reallocates the vertex and texture coordinate and normal arrays.  Existing vertices are 
      * copied .  If the new size is less than the old size, the first numVertices vertices are 
      * copied.  If the new size is larger, all vertices are copied and the new vertices are 
      * initialized to zero.
      * \param numVertices    The new number of vertices for the object
      * \param initializeNew  Whether or not to initialize the new vertices
      * \param copyOld        Whether or not to copy the old data
      */
    virtual GLS_EXPORT void ReallocateVertices( unsigned int numVertices, bool initializeNew, bool copyOld );

    /** Return the relative angle of an line constructed from the given point
      * to the _location of the object, (in the xy plane)
      * \param x X coordinate of endpoint
      * \param y Y coordinate of endpoint
      * \return Relative angle in degrees
      */
    virtual GLS_EXPORT float RelativeAngle( const float x, const float y );

    /** Gets a reference to the specified attribute for reading and writing.
      * This reference can be streamed into and out of variables.
      * For Example: someObject->Resource("Visible") >> someBool;
      *              someBool << someObject->Resource("Visible");
      */
    virtual GLS_EXPORT DistiAttributeBase& Resource( const char* name );

    /** Writes the resources (attributes) of this object to the specified stream.
      * The output of this method can be controlled by the GlsResourceFilter.
      * Note that if filter->NamesOnly() is false (the default), then only resources
      * that can return a value will appear in the list.
      *
      * \sa GlsResourceFilter
      * \sa DistiAttributeProperty
      * \param outstr The stream to write to
      * \param filter The filter to determine what to write
      */
    virtual GLS_EXPORT void GetResources( std::ostream& outstr, GlsResourceFilter* filter = NULL );

#ifndef GLES
    /** Restores the alpha test/blend settings if they were changed from default 
      * \sa SetupAlpha
      */
    GLS_EXPORT void RestoreAlpha( void );

    /** Restores the antialias settings if they were changed from default
      * \sa SetupAntiAlias
      */
    GLS_EXPORT void RestoreAntiAlias( void );

    /** Restores the lighting state 
      * \sa SetupLighting
      */
    GLS_EXPORT void RestoreLighting( void );

    /** Sets the line style settings to their defaults
      * \sa SetupLineStyle
      */
    GLS_EXPORT void RestoreLineStyle( void );
#endif

    /** \return The rotation point for the object. 
      * Lifetime is guaranteed to coincide with the DisplayObject's lifetime.
      */
    const Vertex& RotationPoint() const { return _rotationPoint; }

    /** Sets the location of the rotation point for the object. Dynamic
      * rotation of the object will cause the object to be rotated around this
      * point.
      * \param  v The new rotation point
      */
    virtual GLS_EXPORT void RotationPoint( const Vertex& v );

    /** Sets the location of the rotation point for the object. Dynamic
      * rotation of the object will cause the object to be rotated around this
      * point.
      * \param x X Coordinate of the new rotation point
      * \param y Y Coordinate of the new rotation point
      * \param z Z Coordinate of the new rotation point
      */
    virtual GLS_EXPORT void RotationPoint( float x, float y, float z );

    /** Gets the location of the rotation point for the object.
      * \param v   Will be filled in with the current rotation point
      */
    virtual GLS_EXPORT void GetRotationPoint( Vertex& v );

    /** Rotates the object (around the specified axis) by the angle
      * indicated, at the object's rotation point. Recalculates the
      * vertex data.
      * \param angle  The angle to rotate by, in degrees
      * \param axis   The axis to rotate the object around.
      */
    virtual GLS_EXPORT void Rotate( float angle, int axis = Z_AXIS );

    /** Rotates the object (around the specified axis) by the angle indicated,
      * at the point specified. Recalculates the vertex data. 
      * \param origin   The point to rotate around
      * \param angle  The angle to rotate by, in degrees
      * \param axis   The axis to rotate the object around
      */
    virtual GLS_EXPORT void Rotate( const Vector& origin, float angle, int axis = Z_AXIS );

    /** Rotates the object (around the specified axis) by the angle indicated,
      * at the point specified. Recalculates the vertex data. 
      * \param orig   The point to rotate around
      * \param angle  The angle to rotate by, in degrees
      * \param axis   The arbitrary axis to rotate the object around
      */
    virtual GLS_EXPORT void Rotate( const Vector& orig, float angle, const Vector& axis );

    /** Causes the Projection, Model and View matrix for this object to be saved.  Used by the 3D 
      * picking algorithm.  Normally not used by the user.
      */
    GLS_EXPORT void SaveMatrices();

    /** Scales the object, either the handleBar, or the Anchor is
      * used to translate the object, not both.  Anchor takes 
      * presidence, if it is set HandleBar is ignored.
      * The footprint is different from the 2D scale so the compiler can destinguish the two.
      * \param px Value of the percentage of scale in x-axis
      * \param py Value of the percentage of scale in y-axis
      * \param pz Value of the percentage of scale in z-axis
      * \param anchor Anchor from which to scale object relative to
      * \param handleBar Vertex that is being dragged
      */
    virtual GLS_EXPORT void Scale( float px, float py, float pz, Vertex* anchor, int handleBar = 0 );

    /** Set attributes of the object using VarArgs style interface
      * Object attributes are defined with an enumeration.  This
      * routine is designed to make generated code very clean and readable.
      * \sa GLS_Initializers
      */
    GLS_EXPORT void Set( int spec, ... );

    /** Sets the alpha test/blend settings based on object settings
      * \sa RestoreAlpha
      */
    GLS_EXPORT bool SetupAlpha( void );

#ifndef GLES
    /** Sets the antialias settings based on object settings
      * \sa RestoreAntiAlias
      */
    GLS_EXPORT bool SetupAntiAlias( void );
#endif

    /** Sets the depth test settings based on object settings */
    GLS_EXPORT void SetupDepthTest( void );

    /** Sets the lighting state
      * \sa RestoreLighting
      */
    GLS_EXPORT void SetupLighting( void );

    /** Sets the line style settings based on object settings
      * \return True if the line style was set.  If this method returns true
      * then the object must call RestoreLineStyle to cleanup
      * \sa RestoreLineStyle
      */
    GLS_EXPORT bool SetupLineStyle( void );

#if !defined( GLES )
    /** Sets the polygon draw style based on object settings */
    GLS_EXPORT void SetupPolyDrawStyle( void );

    /** Sets the shading settings based on object settings */
    GLS_EXPORT void SetupShading( void );
#endif

    /** First half of texture setup for the object.
      * \return True if the object will be textured  False otherwise.
      *  If this method returns true, then the caller needs to do
      *  a glDisable(GL_TEXTURE_2D) afterwards to cleanup
      */
    GLS_EXPORT bool SetupTexture( void );

    /** Gets the polygon shading mode (Flat or gouraud) for the polygon
      * \return Enumeration indicating shading mode
      * \sa ShadingType_e
      */
    virtual GLS_EXPORT int Shading( void );

    /** Sets the polygon shading mode (Flat or gouraud) for the polygon
      * \param shading  Enumeration indicating shading mode
      * \sa ShadingType_e
      */
    virtual GLS_EXPORT void Shading( const int shading );

    /** Determines the static extents of the geometry projected to the XY plane of an arbirary coordinate system.
      * \param min Returns the minimum values found in the traversal
      * \param max Returns the maximum values found in the traversal
      * \param matrix Transformation matrix from logical coordinates to the coordinate system to determine the extents in. 
      * \param resetMinMax Normally not specified by user. Should be true for the initial call.  
      */
    virtual GLS_EXPORT void GetTransformedExtents( Vector& min, Vector& max, const GlsMatrixType& matrix, bool resetMinMax = true );

    /** Sets the texture coordinate data for this object
      * \param nPoints  The number of texture vertices in the object
      * \param new_tex_coord  The texture coordinates for the object
      * \param isVectorArray  true if array points to a Vector array, false if it
      *                       points to a Vertex array
      * \sa TextureCoordinates()
      * \sa VaSetTexCoords()
      * \sa SetTexCoords()
      */
    virtual GLS_EXPORT void SetTexCoords( unsigned int nPoints, Vector* new_tex_coord, bool isVectorArray = true );

    /** Vertex version of SetTexCoords 
      * \sa VaSetTexCoords()
      * \sa TextureCoordinates()
      */
    void SetTexCoords( unsigned int nPoints, Vertex* new_tex_coord )
    {
        SetTexCoords( nPoints, new_tex_coord, false );
    }

    /** Sets the texture coordinate data for this object
      * \param nPoints  The number of texture vertices in the object
      * \param ...  X,Y,Z for each vertex
      * \sa TextureCoordinates()
      * \sa GetTextureCoordinates()
      */
    GLS_EXPORT void VaSetTexCoords( unsigned int nPoints, ... );

    /** Gets the object's texture coordinates
      * \note Texture Coordinates are vertex attributes. They can be two-dimensional 
      *       (UV-coordinates) or three-dimensional (UVW-coordinates). The texture coordinates at each
      *       vertex are interpolated across the triangle generated from those vertices to determine 
      *       where to sample the texture applied to the object.
      * \note Some shaders use UVW coordinates as an input, but use them for some other purpose than texturing.
      * \return  Pointer to the object's texture coordinate array.  NULL if the object is not textured.
      * \sa GetTextureCoordinates()
      * \sa VaSetTexCoords()
      * \sa SetTexCoords()
      * \sa GetTexturePoints()
      */
    Vector* TextureCoordinates( void ) { return _texCoord; }

    /** Gets the object's texture coordinates
      * \return  Pointer to the object's texture coordinate array.  NULL if the object is not textured.
      * \sa TextureCoordinates()
      * \sa GetTexturePoints()
      */
    Vector* GetTextureCoordinates( void ) { return _texCoord; }

    /** Get the texture index for this object
      * \return The texture index for this object
      */
    virtual GLS_EXPORT int TextureIndex( void );

    /** Sets the texture index to be used when drawing the object.
      * \param textureIndex The texture index to use.
      *  -1 indicates that no texture will be drawn.
      */
    virtual GLS_EXPORT void TextureIndex( int textureIndex );

    /** Gets the object's texture points
      * \return  Pointer to the object's texture point array.
      * \note For most DisplayObjects, the Texture Points are used to compute the texture coordinates.
      *       The TexturePoints are four vertices that describe where the "corners" of the texture is in 
      *       Vertex Coordinates (i.e., the object's parent's logical coordinate space translated to
      *       the object location). The DisplayObject then uses a projection to compute the texture
      *       coordinates from these points. The most common is a Planar mapping, but a few objects 
      *       use other mappings (e.g. Spherical or Cylindrical).
      * \sa TextureCoordinates()
      * \sa GetTextureCoordinates()
      */
    virtual GLS_EXPORT Vector* GetTexturePoints( void );

    /** Gets the texturing repeat mode for this object
      * \return The texture repeat mode for this object 
      */
    virtual GLS_EXPORT bool TextureRepeat( void );

    /** Sets the texturing repeat mode for this object
      * \param rep The new texture repeat mode for this object (boolean)
      */
    virtual GLS_EXPORT void TextureRepeat( const int rep );

    /** Gets the texturing mapping mode for this object
      * \return The texture mapping mode for this object
      * \sa TextureMap_e
      */
    virtual GLS_EXPORT int TextureMappingTechnique( void );

    /** Sets the texturing mapping mode for this object
      * \param map The new texture mapping mode for this object
      * \sa TextureMap_e
      */
    virtual GLS_EXPORT void TextureMappingTechnique( const int map );

    /** Gets the texture magnification filter for this object
      * \return The texture magnification filter for this object
      * \sa TextureFilter_e
      */
    virtual GLS_EXPORT int TextureMagnificationFilter( void );

    /** Sets the texture magnification filter for this object
      * \param filter The new texture magnification filter for this object
      * \sa TextureFilter_e
      */
    virtual GLS_EXPORT void TextureMagnificationFilter( const int filter );

    /** Gets the texture minification filter for this object
      * \return The texture minification filter for this object
      * \sa TextureFilter_e
      */
    virtual GLS_EXPORT int TextureMinificationFilter( void );

    /** Sets the texture minification filter for this object
      * \param filter The new texture minification filter for this object
      * \sa TextureFilter_e
      */
    virtual GLS_EXPORT void TextureMinificationFilter( const int filter );

    /** Moves the object by the amount indicated.
      * \param tr  Float[3] array containing the x,y,z amounts to translate by
      */
    virtual GLS_EXPORT void Translate( float tr[] );

    /** Moves the object by the amount indicated.
      * \param x  X amount to translate by
      * \param y  Y amount to translate by
      * \param z  Z amount to translate by
      */
    virtual GLS_EXPORT void Translate( float x, float y, float z );

    /** Moves the object's vertices by the amount indicated.  Does not change _location.
      * \param x  X amount to translate by
      * \param y  Y amount to translate by
      * \param z  Z amount to translate by
      */
    virtual GLS_EXPORT void TranslateVertices( float x, float y, float z );

    /** Updates the bounding volume of this object 
      * This method should be called if the vertices change for picking and
      * culling to work correctly.
      * This will only update this object.  If PerformGroupCullCheck is enabled
      * for one of the objects parents, you may also need to call
      * CalculateParentBoundingBox() to update all of the objects parents.
      */
    virtual void GLS_EXPORT UpdateBoundingVolume( void );

    /** Gets the current UserData pointer.  UserData is a pointer the user can
      * use to attach user defined data to a GL Studio object.
      * \return The current UserData pointer
      */
    void* UserData( void ) const { return _userData; }

    /** Sets the current UserData pointer 
      * \param data The new UserData pointer
      */
    void UserData( void* data ) { _userData = data; }

    /** Changes the color of a vertex
      * \param vertex  1 based index of the vertex to the change color for
      * \param CurrentFillColor The new RGBA (0-255 range) color for the vertex
      */
    virtual GLS_EXPORT void SetVertexColor( unsigned int vertex, unsigned char CurrentFillColor[] );

    /** Gets the object's vertices.
      * You should call UpdateBoundingVolume after changing an object's extents.
      * \sa UpdateBoundingVolume
      * \return  Pointer to the object's vertex array
      */
    virtual GLS_EXPORT Vertex* Vertices() { return _vertices; }

    /** Sets the vertex data for this polygon
      * You should call UpdateBoundingVolume after changing an object's extents.
      * \sa UpdateBoundingVolume
      * \param nPoints  The number of vertices in the object
      * \param vertices  The vertex data for the object
      */
    virtual GLS_EXPORT void SetVertices( unsigned int nPoints, Vertex* vertices );

    /** Sets the vertex data for this object
      * You should call UpdateBoundingVolume after changing an object's extents.
      * \sa UpdateBoundingVolume
      * \param nPoints  The number of vertices in the object
      * \param ...      r,g,b,a,x,y,z for each vertex  
      */
    GLS_EXPORT void VaSetVertices( unsigned int nPoints, ... );

protected:
    /** Sets the vertex data for this object
      * You should call UpdateBoundingVolume after changing an object's extents.
      * \sa UpdateBoundingVolume
      * \param nPoints  The number of vertices in the object
      * \param args     va_list in the form r,g,b,a,x,y,z for each vertex  
      */
    virtual GLS_EXPORT void VaListSetVertices( unsigned int nPoints, va_list args );

    /** Sets the normal data for this object
      * This function is called as part of VaSetNormals( unsigned int, ... )
      * \param nPoints  The number of normals in the object
      * \param args     va_list in the form x,y,z for each normal
      */
    virtual GLS_EXPORT void VaListSetNormals( unsigned int nPoints, va_list args );

    /** Sets the texture coordinate data for this object
      * This function is called as part of VaTexCoords( unsigned int, ... )
      * \param nPoints  The number of texture coordinates in the object
      * \param args     va_list in the form x,y,z for each texture coordinate
      */
    virtual GLS_EXPORT void VaListSetTexCoords( unsigned int nPoints, va_list args );

public:
    /** \return The saved View matrix, if any. Normally not used by the user.*/
    GLS_EXPORT int* ViewMatrix();

    /** Get the visibility state this object
      * \return Whether or not this object is enabled for drawing
      */
    inline bool Visible( void ) const { return _visible; }

    /** Get the visibility state this object
      * \return Whether or not this object is enabled for drawing
      */
    inline bool Visibility( void ) const { return _visible; }

    /** Set the visiblity state for this object
      * \param vis  Whether or not enable this object for drawing
      */
    virtual GLS_EXPORT void Visibility( const bool vis );

    /** Gets the rotation point for the object in world coordinates
      * \return The rotation point for the object in world coordinates
      */
    virtual GLS_EXPORT Vector WorldRotationPoint( void );

    /** Sets the rotation point for the object in world coordinates
      * \param vert The rotation point for the object in world coordinates
      */
    virtual GLS_EXPORT void WorldRotationPoint( const Vector& vert );

    /** Gets a vertex from the object, in World coordinates (i.e. not relative to the location 
      * as is the case with the Vertices() API call).  
      * \param i  Index of the vertex to get
      * \return The vertex
      */
    virtual GLS_EXPORT Vertex WorldVertex( unsigned int i );

    /** Sets a vertex of the object, in World coordinates (i.e. not relative to the location 
      * as is the case with the Vertices() API call. ) 
      * \param i     The 0 based index of the vertex to get
      * \param vert  The new vertex value
      */
    virtual GLS_EXPORT void WorldVertex( unsigned int i, const Vertex& vert );

    /** Convert a point from logical coordinates to window coordinates 
      * \param logical The point in logical coordinates
      * \param winLoc The returned value in window coordinates. Z Ranges from 0.0 to 1.0.  0.0 is near clip, 1.0 is far clip.
      * \param alternateMatrices When supplied it is used instead of self determined matrices.
      */
    GLS_EXPORT bool LogicalToWindow( const Vector& logical,
        Vector&                                    winLoc, /* .z is 0.0 -> 1.0 */
        const OpenGLMatrices&                      alternateMatrices = OpenGLMatrices() );

    /** Convert a point in window coordinates to logical coordinates
      * \param winLoc Coordinate in window coordinates.  X and Y are in pixels. Z Ranges from 0.0 to 1.0.  0.0 is near clip, 1.0 is far clip.
      * \param logical  Coordinate in logical coordinates (returned)
      * \param directionVector  normal into the screen at the point (returned)
      * \param alternateMatrices  A Set of matrices that if supplied, will alter the point
      */
    GLS_EXPORT bool WindowToLogical(
        const Vector&         winLoc,
        Vector&               logical,                  /* returned */
        Vector*               directionVector   = NULL, /* returned if not NULL */
        const OpenGLMatrices& alternateMatrices = OpenGLMatrices() );

    /** PROJECT a point from logical coordinates to the object's DCS's XY plane
      * \param logicalPoint The original point in logical coordinates
      * \param objectLocal The returned point in the objects DCS coordinate system on the XY plane.
      * \param directionVector The direction vector to use when projecting the point.  If NULL, the point will be converted but not projected.
      * \param planeNormal
      * \param planePoint
      * \param dcsMatrix An alternate DCS matrix to convert to.
      */
    GLS_EXPORT void LogicalToDCS(
        Vector               logicalPoint,
        Vector&              objectLocal, /* returned */
        const Vector*        directionVector,
        const Vector&        planeNormal = Vector( 0, 0, 1 ), /* X/Y plane */
        const Vector&        planePoint  = Vector(),
        const GlsMatrixType* dcsMatrix   = NULL );

    /** Transform a point from the object's DCS coordinate system to the logical coordinate system.
      * \param dcsPoint The original point in dcs coordinates
      * \param logicalPoint The returned point in the objects DCS coordinate system on the XY plane.
      * \param dcsMatrix An alternate DCS matrix to convert from.
      */
    GLS_EXPORT void DCSToLogical(
        Vector               dcsPoint,
        Vector&              logicalPoint, /* returned */
        const GlsMatrixType* dcsMatrix = NULL );

#ifdef GLES
    /** Create a new DisplayObject, reading the properties in order from our GLO.
      * \param dataStream The GLO data stream we are getting our properties from.
      * \param parent The Group that will be this object's parent.
      */
    GLS_EXPORT bool Create( GlsGloFile& dataStream, Group* parent );

    GLS_EXPORT void GeometryRefresh();
#endif

protected:
#ifdef GLES
    bool _geometryRefresh; /**< Whether or not the geometry needs to be refreshed to the hardware */

    GLS_EXPORT void ApplyTextureMinMagSettings();
    GLS_EXPORT void ApplyTextureEnvModeSettings();
    GLS_EXPORT bool SetupTextureIsNeeded();

#endif

    int _alphaMode; /**< Whether or not to perform alpha testing while drawing. */

    bool _antiAlias; /**< Whether or not to perform anti-aliasing while drawing. */

    bool _attributesAdded; /**< True if SetAvailableAttributes has been called. Users should not change this. */

    bool _blinking; /**< Whether or not the blinking mode is turned on */

    float _blinkRate; /**< Number of times per second the object will blink */

    GlsColor _color; /**< The RGBA color for drawing the outline of the object. */

    bool _cullBackFace; /**< Whether or not to remove backfaces */

    GlsMatrixType _dcsMatrix; /**< The dynamic coordinate system.  The Dynamic changes to rotation, scale, and translate will 
                                      * be modified by this and applied to the _drawMatrix. */

    unsigned char _depthTest; /**< What kind of depth testing while drawing. See DepthBuffer_e*/

    GlsMatrixType* _drawMatrix; /**< The objects current contribution to the draw matrix.  
                                      * This will be multiplied by the current matrix at draw time. 
                                      * If NULL, this object has no contribution (it is not dynamic)
                                      * See CalcDrawMatrix() for more */

    bool _needCalcDrawMatrix; /** True if CalcDrawMatrix() needs to be called on this object */

    unsigned char _lineStippleMultiplier; /**< The multiplier used when applying a line stipple pattern to a line. */

    unsigned short _lineStipplePattern; /**< A bit pattern indicating which pixels in a line should be drawn and which pixels should not. */

    float _lineWidth; /**< The current width of lines rendered in the object, in logical units */

    Vertex _location; /**< The location of the origin point for this object, in the world coordinate system. */

    DynamicArray<int> _materialIndices;

    GlsMatrixType* _modelMatrix; /**< Stores the Model matrix for this object, if needed.  Used by Draw() and 3D picking. */

    Vector* _normals; /**< The array of vertex normals for this object.
                          * The size of this array is based on _nVertices */

    unsigned int _nTex_vertices; /**< The number of Texture Coordinate Vertices in this object */

    unsigned int _nVertices; /**< The number of vertices in this object */

    unsigned char _polygonEnd; /**< Whether or not this is a CLOSED or OPEN polygon */

    unsigned char _polygonMode; /**< The mode for drawing the object. */

    int _polygonOffset; /**< The depth buffer offset for this object */

    GlsMatrixType* _projMatrix; /**< Stores the Projection matrix for this object, if needed.  Used by Draw() and 3D picking. */

    unsigned char _shading; /**< The shading mode for this object */

    Vector* _texCoord; /**< The array of texture coordinates for this object.  If an object is untextured,
                          * this value is NULL.  The size of this array is based on _nTex_vertices */

    GlsColor _textureBlendColor; /**< The current texture blend color (used if TextureMapMode is TEXTURE_MAP_BLEND mode only) */

    int _textureIndex; /**< The index into the texture palette array of the texture used to
                          * to texture this object. A texture index of -1 indicates that no
                          * texture is assigned to the object. */

    unsigned char _textureMagFilter; /**< The current texturing magnification filter mode for the object */

    unsigned char _textureMinFilter; /**< The current texturing minification filter mode for the object */

    unsigned char _textureMap; /**< The current texturing map mode for the object. */

    Vector _texturePoints[ NUM_TEXTURE_POINTS ]; /**< Used to store the relative placement and rotation of a texture on
                                                  * the object.  Texture coordinates are calculated from the texture points.
                                                  * The _texturePoints are relative to the _location, which makes
                                                  * them in the objects coordinate system.
                                                  */

    unsigned char _textureRepeat; /**< The current texturing repeat mode for the object. */

    void* _userData; /**< Data pointer for the user to assign as needed */

    Vertex* _vertices; /**< The array of vertices for this object.  The vertices are in the object's
                          * coordinate system.  That is, they are relative to the _location field.
                          * This array always has a size based on _nVertices */

    int* _viewMatrix; /**< Stores the View matrix for this object, if needed.  Used by Draw() and 3D picking. */

    bool _visible; /**< Whether or not the object is enabled for drawing */

    virtual GLS_EXPORT int ColorMaterialMode( void );

    /** Allocate the model matrix, if needed */
    GLS_EXPORT void AllocateModelMatrix();

    /** Applies dynamic rotation to object, saving the matrix stack
      * so that dynamic picking can occur
      * \return True if a rotation was performed.  False otherwise.
      *  If this method returns true, then the caller needs to do
      *  a glPopMatrix to restore the stack after drawing
      */
    GLS_EXPORT bool ApplyDynamicRotation( void );

    /** Creates and recalculates the _drawMatrix
      * If _rotation, _dynamicScale, or _dynamicTranslate change you must call CalcDrawMatrix()
      * If _dcsMatrix, _location, or _rotationPoint change you need to call CalcDrawMatrixIfExists()
      * These are normally called automatically for you by the API Methods that affect those values.
      * Sub-classes may override CalcDrawMatrix() to include additional transformations in the _drawMatrix.
      */
    virtual GLS_EXPORT void CalcDrawMatrix();

    /** Recalculates the _drawMatrix if it exists.
      * See CalcDrawMatrix() for more info. */
    inline void CalcDrawMatrixIfExists()
    {
        if( _drawMatrix )
        {
            CalcDrawMatrix();
        }
    }

    /** Applies the _drawMatrix to the modelMatrix.  
      * If necessary derived classes can save other matrices.
      * \param  newMatrices  A set of matrices passed down to this object from its parent.
      */
    virtual GLS_EXPORT void CalculateMatrices( const OpenGLMatrices& newMatrices );

    /** Returns true if the point is inside the 2D extents of the given vertices
      * \param x X coordinate of pick point
      * \param y Y coordinate of pick point
      * \param nVerts Number of vertices to try
      * \param verts  Vertex array to try
      * \param tolerance  Picking tolerance
      */
    GLS_EXPORT bool InsideVertexExtents( float x, float y, unsigned int nVerts, Vertex* verts, float tolerance );

    /* Used internally to determine if the user has modified the location */
    inline void LastDrawMatrixLocation( const Vertex& loc ) { _lastDrawMatrixLocation = loc; }

    /* Used internally to determine if the user has modified the location */
    inline const Vertex& LastDrawMatrixLocation() { return _lastDrawMatrixLocation; }

    /** Set the value of _needCalculate */
    inline void NeedCalculate( bool val ) { _needCalculate = val; }

    /** Sets up the object for picking by dynamically rotating vertices
      * \param x X coordinate of pick point
      * \param y Y coordinate of pick point
      * \param z Z coordinate of pick point
      * \param vertices Vertex array to setup
      * \param vertex_cnt Number of vertices to setup
      * \param directionVector dynamic rotation vector
      */
    GLS_EXPORT void PickSetup( float x, float y, float z, Vertex* vertices, unsigned int vertex_cnt, const Vector& directionVector );

    /** Restores the temporarily rotated vertices
      * \param vertices Vertex array to restore
      * \param vertex_cnt Number of vertices to restore
      */
    GLS_EXPORT void PickCleanup( Vertex* vertices, unsigned int vertex_cnt );

#ifdef GLES
    /** 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 );
#endif

    /** Finds three coplanar points and the surface normal, if possible.  This calculation is performed using the
      * Vertices() of this object.  Used in the editor to determine how to map a texture onto an object.
      * \param p1  Returns a point on the plane
      * \param p2  Returns a point on the plane
      * \param p3  Returns a point on the plane
      * \param planeVector Returns the surface normal of the plane
      * \return  True if 3 coplanar points were found
      */
public:
    virtual GLS_EXPORT bool GetPlaneVectorPoints( Vertex& p1, Vertex& p2, Vertex& p3, Vertex& planeVector );

    /** Implements AttributeChangedNotifier::NotifyAttributeChanged.
      * Notify the class that the attribute has changed.  Observers of the attribute will have their callbacks called 
      * \param name the name of the attribute
      */
    GLS_EXPORT void NotifyAttributeChanged( const AttributeName& name ) DISTI_METHOD_OVERRIDE;

    /** Sets the painter for this object.  Can be NULL.  If the painter is set, this object will call Invalidate() on the painter anytime it changes
      * in a way that affects its rendering.  
      * \note This object only observers the painter, and does not delete it.
      * \param painter the painter that is drawing this class.
      */
    virtual GLS_EXPORT void SetPainter( GlsPainter* painter );

    /** Returns the painter for this object, or NULL of none. The return value is an observer pointer and should not be deleted
      */
    GLS_EXPORT virtual GlsPainter* GetPainter();

    /** Invalidates the painter set on this object if that painter exists. 
      * Typically called by user code when it modifies an object in such a
      * way where the painter invalidation system wouldn't work automatically
      * (for example, directly modifying vertex data).
      */
    GLS_EXPORT void InvalidatePainter();

    /** Traverses upward in the hierarchy to determine if this object is visible in the scene.
      * Overloaded for classes that handle child visibility without using the Visibility flag such as GlsMutexGroup.
      */
    GLS_EXPORT virtual bool IsVisibleInScene( const DisplayObject* obj = NULL ) const;

protected:
    /** Sets an attribute of this object using variable arguments
      * \param spec  A GLS_Initializer tag
      * \param args  A variable argument list
      */
    GLS_EXPORT virtual void SetValue( int spec, va_list& args );

private:
    void CopyGeometryInternal( const DisplayObject* src );
    void CopyPropertiesInternal( const DisplayObject* src );
    void CopyHierarchyPropertiesInternal( const DisplayObject* src, bool copyName );

    DistiAttribDict* _attribDict; /**< Stores all of this object's metadata attributes */

    Vector _boundingVolumeCenter; /**< Center of the bounding volume (relative to Location())*/

    float _boundingVolumeRadius; /**< Radius of the bounding sphere */

    CallbackMethodCallerBase* _callbackCaller; /**< The pointer to the callback caller for this object. 
                                                * This is currently unrelated to the InputDevice callback */

    bool _culled; /**< Whether or not this object is currently culled */

    float _dynamicTranslate[ 3 ]; /* The current (dynamic) translation of the object, in logical units and relative to the object's DCS.
                                 * _dynamicTranslate[0] = x traslation
                                 * _dynamicTranslate[1] = y traslation
                                 * _dynamicTranslate[2] = z traslation */

    float _dynamicScale[ 3 ]; /* The current (dynamic) scale of the object */

    EditorObjectBase* _editorObject; /* Used in the editor to access editor functionality */

    char* _instanceName; /**< A unique character string used to identify the object. This name
                             * will correspond to the name of the C++ member variable generated for
                             * this object in the output code. */

    Vertex _lastDrawMatrixLocation; /**< The value of _location the last time CalcDrawMatrix() was called */

    bool _lightingEnabled; /**< Stores the lighting enabled state */

    bool _needCalculate; /* true if Calculate() needs be called on this object.
                             * Defaults to true.
                             * Calculate() may still be called in some situations */

    DisplayFrame* _parent; /**< The display frame or component that contains this object */

    Group* _parentGroup; /**< The group of which this object is a member */

    GlsPainter* _painter; /** The painter, can be NULL, used for conditional rendering */

    unsigned char _pickable; /**< The type of picking that is enabled for this object */

    float _rotation[ 3 ]; /* The current (dynamic) rotation of the object, in degrees and relative to 
                         * the object's rotation point. Order of rotation is x, then y, then z
                         * _rotation[0] = x rotation angle
                         * _rotation[1] = y rotation angle
                         * _rotation[2] = z rotation angle */

    Vertex _rotationPoint; /* The location, in the object coordinate system, of the point to rotate
                             * this object around when the object is dynamically rotated.
                             * So when we want to rotate this object (not just rotate the view), this
                             * is the point to rotate about.  This point is relative to the _location,
                             * which makes in in the objects coordinate system. */

    GLS_EXPORT void DisplayColorMaterialModeError( const int mode );
    GLS_EXPORT int  DisplayColorMaterialModeError();

    void CommonConstructorInit( float x, float y, float z );

    /** Callback for when DCS Matrix changes through the resource API */
    void OnDCSMatrixChanged();

    /** Callback for when Vertices change through the resource API */
    void OnVerticesChanged();

    /** Callback for when Texture coordinates change through the resource API */
    void OnTextureCoordsChanged();

    /** Assignment operator not implemented. Use CloneObject() or the copy constructor instead. */
    DisplayObject& operator=( const DisplayObject& that ); // = delete

protected:
    /** Returns the local setting for _textureIndex if not -1,
      * otherwise returns the group texture index.
      */
    GLS_EXPORT int GetApplicableTextureIndex();
    /** Returns the local setting for _textureRepeat if
      * _textureIndex is not -1,
      * otherwise returns the group texture repeat setting.
      */
    GLS_EXPORT int GetApplicableTextureRepeat();

#ifdef GLES
    IGlsStateManager* _stateManager;
#endif

#ifdef GLES20
    IGlsStateManagerES20* _stateManagerES20;
#endif
};

} // namespace disti

#endif