CGenericArray.h

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//==============================================================================
/*
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    Copyright (c) 2003-2016, CHAI3D.
    (www.chai3d.org)

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    * Redistributions in binary form must reproduce the above
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    disclaimer in the documentation and/or other materials provided
    with the distribution.

    * Neither the name of CHAI3D nor the names of its contributors may
    be used to endorse or promote products derived from this software
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    \author    <http://www.chai3d.org>
    \author    Francois Conti
    \version   3.2.0 $Rev: 2015 $
*/
//==============================================================================

//------------------------------------------------------------------------------
#ifndef CGenericArrayH
#define CGenericArrayH
//------------------------------------------------------------------------------
#include "math/CGeometry.h"
#include "graphics/CVertexArray.h"
//------------------------------------------------------------------------------
namespace chai3d {
//------------------------------------------------------------------------------

//------------------------------------------------------------------------------
class cGenericObject;
class cCollisionRecorder;
struct cCollisionSettings;
//------------------------------------------------------------------------------

//==============================================================================
//==============================================================================

//------------------------------------------------------------------------------
class cGenericArray;
typedef std::shared_ptr<cGenericArray> cGenericArrayPtr;
//------------------------------------------------------------------------------

//==============================================================================
//==============================================================================
class cGenericArray
{
    //--------------------------------------------------------------------------
    // CONSTRUCTOR & DESTRUCTOR:
    //--------------------------------------------------------------------------

public:

    //--------------------------------------------------------------------------
    //--------------------------------------------------------------------------
    cGenericArray(cVertexArrayPtr a_vertexArray)
    {
        // clear all elements
        clear();

        // initialize OpenGL buffer ID 
        m_elementBuffer         = 0;
    }


    //--------------------------------------------------------------------------
    //--------------------------------------------------------------------------
    ~cGenericArray(){}


    virtual void clear()
    {
        m_allocated.clear();
        m_indices.clear();
        m_freeElements.clear();
        m_flagMarkForUpdate     = true;
        m_flagMarkForResize     = true;
    }


    static cGenericArrayPtr create(cVertexArrayPtr a_vertexArray) { return (std::make_shared<cGenericArray>(a_vertexArray)); }


    //--------------------------------------------------------------------------
    // PUBLIC METHODS:
    //--------------------------------------------------------------------------

public:

    virtual unsigned int getNumElements() { return (unsigned int)(m_allocated.size()); }

    virtual unsigned int getNumVerticesPerElement() { return (1); }

    void compress();


    //--------------------------------------------------------------------------
    //--------------------------------------------------------------------------
    inline bool getAllocated(const unsigned int a_index) const
    {
        return (m_allocated[a_index]);
    };


    //--------------------------------------------------------------------------
    //--------------------------------------------------------------------------
    virtual unsigned int getVertexIndex(const unsigned int a_elementIndex,
                                        const unsigned int a_vertexNumber) const
    {
        return (0);
    }


    //--------------------------------------------------------------------------
    //--------------------------------------------------------------------------
    cVector3d getTexCoordAtPosition(const unsigned int a_elementIndex, 
                                    const cVector3d& a_localPos)
    {
        cVector3d texCoord(0.0, 0.0, 0.0);
        return (texCoord);
    }


    virtual void render()
    { 
    }

    virtual bool computeCollision(const unsigned int a_elementIndex,
                                  cGenericObject* a_object,
                                  cVector3d& a_segmentPointA,
                                  cVector3d& a_segmentPointB,
                                  cCollisionRecorder& a_recorder,
                                  cCollisionSettings& a_settings) const { return (false); }


    //--------------------------------------------------------------------------
    // PUBLIC MEMBERS:
    //--------------------------------------------------------------------------

public:

    cVertexArrayPtr m_vertices;

    std::vector<unsigned int> m_indices;

    std::vector<bool> m_allocated;

    bool m_flagMarkForUpdate;

    bool m_flagMarkForResize;


    //--------------------------------------------------------------------------
    // PUBLIC MEMBERS: (OPENGL)
    //--------------------------------------------------------------------------

public:

    GLuint m_elementBuffer;


    //--------------------------------------------------------------------------
    // PROTECTED MEMBERS:
    //--------------------------------------------------------------------------

protected:

    std::list<unsigned int> m_freeElements;
};

//------------------------------------------------------------------------------
} // namespace chai3d
//------------------------------------------------------------------------------

//------------------------------------------------------------------------------
#endif
//------------------------------------------------------------------------------