group.h

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/*! \file
  \brief  The disti::Group class.  Implements groups of objects.

  \par Copyright Information

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*/
#ifndef _GROUP_H
#define _GROUP_H

#include "display.h"
#include "dynamic_array.h"
#include "gls_cpp_lang_support.h"

namespace disti
{

/**
  * The Group class.  Implements groups of objects
  */
class Group : public DisplayObject 
{
public:
    typedef DisplayObject _BaseClass;

private:

    /** If true, this object will be eligible for culling based on its static extents.
      * IMPORTANT: The cull will only be acturate within the STATIC extents of the group
      * If any child moves outside the static extents using Dynamic operations, it will
      * be over-culled.
      * The default is false, and only leaf nodes (non-groups) will cull.
      */
    bool _performGroupCullCheck;

    /** If true, cull checking will pass on to children of this group.
      * If false, children will not be culled (if this group is not culled) */
    bool _cullTestChildren;


    DisplayObject *BestPick(const Vector& winLoc,const Vector& logicalCoords,float scale,const Vector& directionVector,Vector& collisionWinLoc /*Returned*/,const OpenGLMatrices& drawnMatrices);
    DisplayObject *FirstPick(const Vector& winLoc,const Vector& logicalCoords,float scale,const Vector& directionVector,Vector& collisionWinLoc /*Returned*/,const OpenGLMatrices& drawnMatrices);

    virtual GLS_EXPORT void onVertexchanged(void);

    Group& operator=( const Group& ) DISTI_SPECIAL_MEM_FUN_DELETE;
    Group( const Group& that ) DISTI_SPECIAL_MEM_FUN_DELETE;

protected:
    DisplayObjectArray _objects;  /** The objects contained in this group */

    /** Helper method for child classes of group that don't want to call Group::SetAvailableAttributes */
    virtual GLS_EXPORT void AddAvailableAttributes(unsigned int availableAttributes);

    /** Grow bounding box to accomodate new object
      * \param obj The new object in the group
      * \pre   obj Must already be added to the group
      */
    void GrowBoundingBox(DisplayObject *obj);

public:
    friend class GroupEditor;

#ifndef GLES
    /* See base class */
    virtual GLS_EXPORT InterfaceListType* GetCppInterfaceDescription(InterfaceListType* addToThisList= NULL );

    /* See base class */
    virtual GLS_EXPORT void GetCppInterfaceDescriptionFree(InterfaceListType* array);
#endif

    /** Finds a pointer to the display object in the group, using the object's
      * instance name as a key.
      * \note If there are multiple DisplayObjects within the group with the same name, 
      *       only the first instance will be found.  This can be an issue if a sub-component
      *       contains objects with the same name as the object you are searching for.
      * \param name  Instance name of the object to find
      * \return A pointer to the object if it is in the group, otherwise NULL
      */
    GLS_EXPORT DisplayObject *FindByName(const char *name);

    /** Finds a pointer to the display object in the group, using the object's
      * instance name as a key.
      * This does not desend into components, as they are different frames
      * with possibility for duplicate names as the current frame.
      * \param name  Instance name of the object to find
      * \return A pointer to the object if it is in the group, otherwise NULL
      */
    virtual GLS_EXPORT DisplayObject *FindByNameSameFrame(const char *name);

    /** Finds a pointer to the display object in the group, using the object's
      * instance name as a key.
      * \param obj  Pointer to the object to find
      * \return A pointer to the object if it is in the group, otherwise NULL
      */
    DisplayObject *FindByName(DisplayObject *obj) { return FindByName(obj->InstanceName()); }

    /** Finds a pointer to the DisplayObject in the group using a qualified instance name.
      * This allows precise searches for an object contained within a sub-component.
      * (e.g. "cockpit.altimeter.needle").  To find an object in the same DisplayFrame
      * use just the instance name. (e.g. "cockpit")
      * The dot denotes crossing of DisplayFrame boundaries.
      * \sa GetQualifiedInstanceName
      * \param name  Qualified instance name of the object to find
      * \returns A pointer to the object if it is in the group, otherwise NULL
      */
    GLS_EXPORT DisplayObject *FindByQualifiedName(const char *name);

    /** Finds a pointer to the display object in the group, using the object's address as a key
      * \param obj  Pointer to the object to find
      * \return A pointer to the object if it is in the group, otherwise NULL
      */
    GLS_EXPORT DisplayObject *FindNonRecursive(DisplayObject *obj);

    /** Returns a reference to the object array for this group */
    DisplayObjectArray& Objects(void) { return _objects; }

    /** Returns the DisplayObject at the given group index */
     DisplayObject *Item(unsigned int index) { return _objects[index]; }

    /** Returns whether or not this group should be considered for culling */
    bool PerformGroupCullCheck(void) const { return _performGroupCullCheck; }

    /** Sets whether or not this group should be considered for culling */
    GLS_EXPORT void PerformGroupCullCheck(bool mode);

    /** Returns whether or not this group's children should be considered for culling */
    bool CullTestChildren(void) const { return _cullTestChildren; }

    /** Sets whether or not this group's children should be considered for culling */
    GLS_EXPORT void CullTestChildren(bool mode);

    /** \return The number of objects in this group. (Non recursive count) */
    unsigned int Count(void) const { return _objects.Count(); }

    /** Overload of the array index operator to allow you to treat this Group as an array of objects */
    DisplayObjectPtr operator[] (unsigned int index) { return _objects[index]; }

    /** \return pointer to the first element in the group, or NULL if it doesn't exist */
    GLS_EXPORT DisplayObject *FirstObject();

    /** \return pointer to the last element in the group, or NULL if it doesn't exist */
    GLS_EXPORT DisplayObject *LastObject(void);

    /** \return True if this group is empty */
    bool IsEmpty() const { return (Count()==0); }

    /** Get the index position of the specified object in the list
      * \param obj   The object to find
      * \return The index of the object in the list, -1 if it isn't in the list
      */
    GLS_EXPORT int  Position(DisplayObject *obj);

    /** Construct a new group.
      * \param generateInstance  Whether or not to generate an instance name for this group
      */
    GLS_EXPORT explicit Group( int generateInstance = FALSE );

    /** Copy construct a new group, performing a "deep copy" by cloning objects in the group.
      * \param group The group to clone.
      * \param generateNames Whether or not to generate a new instance name for this group and its children.
      */
    GLS_EXPORT Group( const Group& group, bool generateNames );

    /** Sets the initial number of entries in a group 
      * \param cnt  The initial number of entries
      */
    GLS_EXPORT void InitialGroupCount(unsigned int cnt);

    static GLS_EXPORT DisplayObject *CreateInstance();

    /** Destroy a group object */
    virtual GLS_EXPORT ~Group();

    /** Actually delete all the children of the group.
      * This does a recursive "delete" on all the children.
      * This does NOT just remove them from the group.
      */
    virtual GLS_EXPORT void DeleteAllChildren();

    virtual GLS_EXPORT void SetAvailableAttributes(unsigned int value);

    /* See base class */
    virtual GLS_EXPORT DisplayObject* CloneObject( bool generateNames = false );

    /* See base class */
    virtual GLS_EXPORT void CopyGeometry(DisplayObject *src);

    /* See base class */
    virtual GLS_EXPORT void CopyProperties(DisplayObject *src);

    /* See base class */
    virtual GLS_EXPORT void Draw(void);

    /* See base class */
    virtual GLS_EXPORT void PreDraw(const OpenGLMatrices& current,Culler& culler);

    /* See base class */
    virtual GLS_EXPORT bool Hit(float x,float y,float z,float scale,const Vector& directionVector, Vector *collisionPoint);

    /* See base class */
    virtual GLS_EXPORT DisplayObject *Pick3D(const Vector& winLoc, 
                                             const Vector& logicalCoords, 
                                             float scale,
                                             const Vector& directionVector,
                                             Vector& collisionWinLoc /*Returned*/,
                                             const OpenGLMatrices& drawnMatrices);


    using _BaseClass::Parent;

    /* See base class */
    virtual GLS_EXPORT void Parent(DisplayFrame *par);

    /* See base class */
    virtual GLS_EXPORT void CalculateBoundingBox(void);

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

    /* See base class */
    virtual GLS_EXPORT void Location(const Vertex &v) DISTI_METHOD_OVERRIDE;
    virtual GLS_EXPORT void Location(float x,float y,float z);

    /* See base class */
    virtual GLS_EXPORT void Translate(float x,float y,float z);

    /* See base class */
    virtual GLS_EXPORT void Translate(float transAmount[]);

    /* See base class */
    virtual GLS_EXPORT void TranslateVertices(float x, float y, float z);

    /* See base class */
    virtual GLS_EXPORT void TranslateVertices(float transAmount[]);

    /* See base class */
    virtual GLS_EXPORT void GetExtents(float &x,float &y,float &z,float &x1,float &y1,float &z1);

    /* See base class */
    virtual GLS_EXPORT void GetTransformedExtents(Vector& min, Vector& max, const GlsMatrixType& matrix, bool resetMinMax = true);

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

    /* See base class */
    virtual GLS_EXPORT void Rotate(const Vector &orig, float angle, const Vector &axis);

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

    /* See base class */
    virtual GLS_EXPORT void Scale(const float scale_x, const float scale_y);

    /* See base class */
    virtual GLS_EXPORT void Scale(float scale_x,float scale_y,float scale_z, Vertex *anchor = NULL, int handle = 0);

    /** Adds the specified object into the group, at the end of the list
      * \param obj A pointer to the object to add
      * \param reparent Whether or not the object parent should be set to this group
      * \param recalculateBoundingbox Whether or not to recalculate the bounding box
      * \param loc Where to insert it (defaults to -1 which means at the end of the list)
      */
    virtual GLS_EXPORT void InsertObject(DisplayObject *obj,bool reparent=true,bool recalculateBoundingbox = true,int loc=-1);

    /** Removes the specified object from this group. Does not delete it.
      * \param obj  The display object to removed
      * \param recalculateBoundingbox
      * \return  True if the object was found and removed from this group
      */
    virtual GLS_EXPORT bool DeleteObject(DisplayObject *obj,bool recalculateBoundingbox = true);

    /** Change the draw order of a child object within this group
      * \param oldIndex  The old index of the object
      * \param newIndex  The new index of the object
      * \pre  oldIndex and newIndex must be valid indices
      */
    virtual GLS_EXPORT void ReorderObject(unsigned int oldIndex,unsigned int newIndex);

    /** Adds the specified object into the group, at the head of the list
      * Treats the list like a stack, hence the name Push
      * \param obj A pointer to the object to add
      */
    virtual GLS_EXPORT void PushObject(DisplayObject *obj);

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

    /** DeleteVertex is overloaded in group to disable it.  It is not possible
      * to delete a Group's Vertices
      */
    virtual GLS_EXPORT void DeleteVertex(unsigned int index);

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

    /** InsertVertex is overloaded in group to disable it.  It is not possible
      * to insert into a Group's Vertices
      */    
    virtual GLS_EXPORT void InsertVertex(unsigned int index);

    /** Copies the given vertex data into the group's location vertex
      * thereby moving the group's location member without affecting
      * its child objects.
      * \param v - Given vertex
      */
    virtual GLS_EXPORT void SetGroupLocation(const Vertex& v);

    /* See base class */
    virtual GLS_EXPORT void GetResources(std::ostream& outstr, GlsResourceFilter* filter= NULL) DISTI_METHOD_OVERRIDE;

    /* See base class */
    virtual GLS_EXPORT void CalculateTextureCoordinates(void) DISTI_METHOD_OVERRIDE;

    virtual GLS_EXPORT void LineWidth(float width) DISTI_METHOD_OVERRIDE;
    virtual GLS_EXPORT float LineWidth(void) DISTI_METHOD_OVERRIDE;
    
    virtual GLS_EXPORT void LineStipplePattern(int pattern) DISTI_METHOD_OVERRIDE;
    virtual GLS_EXPORT int LineStipplePattern(void) DISTI_METHOD_OVERRIDE;
    
    virtual GLS_EXPORT void LineStippleMultiplier(int mult) DISTI_METHOD_OVERRIDE;
    virtual GLS_EXPORT int LineStippleMultiplier(void) DISTI_METHOD_OVERRIDE;
    
    virtual GLS_EXPORT int PolygonMode(void) DISTI_METHOD_OVERRIDE;
    virtual GLS_EXPORT void PolygonMode(int mode) DISTI_METHOD_OVERRIDE;

    virtual GLS_EXPORT void PolygonEnd(const int mode) DISTI_METHOD_OVERRIDE;
    virtual GLS_EXPORT int  PolygonEnd(void) DISTI_METHOD_OVERRIDE;
    
    virtual GLS_EXPORT void Shading(const int mode) DISTI_METHOD_OVERRIDE;
    virtual GLS_EXPORT int Shading(void) DISTI_METHOD_OVERRIDE;
    
    virtual GLS_EXPORT void DepthTest( unsigned char mode) DISTI_METHOD_OVERRIDE;
    virtual GLS_EXPORT int DepthTest(void) DISTI_METHOD_OVERRIDE;
    
    virtual GLS_EXPORT void AntiAlias(bool mode) DISTI_METHOD_OVERRIDE;
    virtual GLS_EXPORT bool AntiAlias(void) DISTI_METHOD_OVERRIDE;
    
    virtual GLS_EXPORT void AlphaMode(int mode) DISTI_METHOD_OVERRIDE;
    virtual GLS_EXPORT int AlphaMode(void) DISTI_METHOD_OVERRIDE;

    virtual GLS_EXPORT void CullBackFace(const bool mode) DISTI_METHOD_OVERRIDE;
    virtual GLS_EXPORT bool CullBackFace(void) DISTI_METHOD_OVERRIDE;

    virtual GLS_EXPORT bool LightingEnabled() DISTI_METHOD_OVERRIDE;
    virtual GLS_EXPORT void LightingEnabled(bool lighting) DISTI_METHOD_OVERRIDE;

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

    virtual GLS_EXPORT void SetBlendColor(const glsColor &color);

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

    virtual GLS_EXPORT glsColor GetBlendColor(void);

    /* Unhides base class implementation. */
    using _BaseClass::SetColor;
 
    virtual GLS_EXPORT void SetColor(const glsColor &color);

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

    virtual GLS_EXPORT glsColor GetColor(void);

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

    virtual GLS_EXPORT void SetFillColor(const glsColor &color);

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

    virtual GLS_EXPORT glsColor GetFillColor(void);

    virtual GLS_EXPORT void TextureRepeat(const int rep);
    virtual GLS_EXPORT bool TextureRepeat(void);

    virtual GLS_EXPORT void TextureMappingTechnique(const int map);
    virtual GLS_EXPORT int TextureMappingTechnique(void);

    virtual GLS_EXPORT void TextureMinificationFilter(const int filter);
    virtual GLS_EXPORT int TextureMinificationFilter(void);

    virtual GLS_EXPORT void TextureMagnificationFilter(const int filter);
    virtual GLS_EXPORT int TextureMagnificationFilter(void);

    /** Call the Calculate method for all children
      * \param time  The current time 
      */
    virtual GLS_EXPORT void Calculate(double time);

    /** The following class is provided for GL Studio 2.1 backward compatibility.  
      * This interface is deprecated and should only be used to support legacy code.
      */
    class CompatabilityListItem
    {
    protected:
        unsigned int _index;
        Group *_parentGroup;
    public:

        GLS_EXPORT CompatabilityListItem();

        GLS_EXPORT CompatabilityListItem* Next();

        GLS_EXPORT CompatabilityListItem* Prev();

        GLS_EXPORT DisplayObject* DataPtr();

        static GLS_EXPORT void RecalcCompatabilityList(Group* whichGroup);
    };

    /** \return The first object in this group
      */
    GLS_EXPORT CompatabilityListItem* First();

    /** \return The last object in this group
      */
    GLS_EXPORT CompatabilityListItem* Last();

    DynamicArray<CompatabilityListItem> _compatList;  /** Use for 2.1 compatibility only */
};

} // namespace disti

#endif