c++ - Draw mulitple objects using OpenGL -


i need draw both square , rectangle in opengl. vertices stored in 2 vertex buffers , bound array buffer follows. however, object bound second object displayed on screen. there way display both together?

void application::setupopenglbuffers(void)  { float vertexcoords = {0.0, 0.0, 1.0, 0.0, 1.0, 1.0, 0.0, 1.0};   glgenbuffers(1, &vertexbuffer);    glbindbuffer(gl_array_buffer, vertexbuffer);    glbufferdata(gl_array_buffer, 2 * 4 * sizeof(float), vertexcoords, gl_static_draw);    float vertexcoords2 = {0.0, 0.0, -0.5, 0.0, -0.5, 0.5, 0.0, 0.5};   glgenbuffers(1, &vertexbuffer2);    glbindbuffer(gl_array_buffer, vertexbuffer2);    glbufferdata(gl_array_buffer, 2 * 4 * sizeof(float), vertexcoords2, gl_static_draw); }   void application::drawscene(void)  { glbindbuffer(gl_array_buffer, vertexbuffer);   glvertexattribpointer(vertattribloc, 2, gl_float, false, 0, 0);   glenablevertexattribarray(vertattribloc);    gldrawarrays(gl_line_strip, 0, 8);     glbindbuffer(gl_array_buffer, vertexbuffer2);     glvertexattribpointer(vertattribloc2, 2, gl_float, false, 0, 0);   glenablevertexattribarray(vertattribloc2);   gldrawarrays(gl_line_strip, 0, 8); }


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