diguyOglGraphicsInstanceGroup.h

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#pragma  once

/*********************************************************************
 ** Copyright (c) 1992-2016 VT MAK
 ** All rights reserved. 
 *********************************************************************/


// needed for function prototypes
#include <GL/glew.h>
#include <GL/gl.h>

#include <diguyGraphicsInstanceGroup.h>

class diguyOglGraphicsInstanceGroup : public diguyGraphicsInstanceGroup
{
public:
        diguyOglGraphicsInstanceGroup(void* internal_data);

        virtual void build();
        virtual void unbuild();

        virtual int bind_instance_group_data(int base_start, int link_start, int count);
        virtual int bind_instance_buffer_data(int num_floats, const float* instance_data);

protected:
        void create_link_matrices_tbo(int num_floats);
        void destroy_link_matrices_tbo();

        static int s_tbo_size_in_floats;
        static GLuint s_link_matrices_buffer;
        static GLuint s_link_matrices_tbo;
};


diguyGraphicsInstanceGroup* diguyOglGraphicsInstanceGroup_create_func(void* internal_data);