opengl-vao-vbo

 struct MyVertex  {    float x, y, z;        //Vertex    float nx, ny, nz;     //Normal    float s0, t0;         //Texcoord0  };    MyVertex pvertex[3];  //VERTEX 0  pvertex[0].x = 0.0;  pvertex[0].y = 0.0;  pvertex[0].z = 0.0;  pvertex[0].nx = 0.0;  pvertex[0].ny = 0.0;  pvertex[0].nz = 1.0;  pvertex[0].s0 = 0.0;  pvertex[0].t0 = 0.0;  //VERTEX 1  pvertex[1].x = 1.0;  pvertex[1].y = 0.0;  pvertex[1].z = 0.0;  pvertex[1].nx = 0.0;  pvertex[1].ny = 0.0;  pvertex[1].nz = 1.0;  pvertex[1].s0 = 1.0;  pvertex[1].t0 = 0.0;  //VERTEX 2  pvertex[2].x = 0.0;  pvertex[2].y = 1.0;  pvertex[2].z = 0.0;  pvertex[2].nx = 0.0;  pvertex[2].ny = 0.0;  pvertex[2].nz = 1.0;  pvertex[2].s0 = 0.0;  pvertex[2].t0 = 1.0;    glGenBuffers(1, VertexVBOID);  glBindBuffer(GL_ARRAY_BUFFER, VertexVBOID);  glBufferData(GL_ARRAY_BUFFER, sizeof(MyVertex)*3, &pvertex[0].x, GL_STATIC_DRAW);    ushort pindices[3];  pindices[0] = 0;  pindices[1] = 1;  pindices[2] = 2;    glGenBuffers(1, &IndexVBOID);  glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, IndexVBOID);  glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(ushort)*3, pindices, GL_STATIC_DRAW);    //Define this somewhere in your header file  define BUFFER_OFFSET(i) ((char *)NULL + (i))    glBindBuffer(GL_ARRAY_BUFFER, VertexVBOID);  glEnableVertexAttribArray(0);    //We like submitting vertices on stream 0 for no special reason  glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(MyVertex), BUFFER_OFFSET(0));   //The starting point of the VBO, for the vertices  glEnableVertexAttribArray(1);    //We like submitting normals on stream 1 for no special reason  glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, sizeof(MyVertex), BUFFER_OFFSET(12));     //The starting point of normals, 12 bytes away  glEnableVertexAttribArray(2);    //We like submitting texcoords on stream 2 for no special reason  glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, sizeof(MyVertex), BUFFER_OFFSET(24));   //The starting point of texcoords, 24 bytes away    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, IndexVBOID);  //To render, we can either use glDrawElements or glDrawRangeElements  //The is the number of indices. 3 indices needed to make a single triangle  glDrawElements(GL_TRIANGLES, 3, GL_UNSIGNED_SHORT, BUFFER_OFFSET(0));   //The starting point of the IBO  //0 and 3 are the first and last vertices  //glDrawRangeElements(GL_TRIANGLES, 0, 3, 3, GL_UNSIGNED_SHORT, BUFFER_OFFSET(0));   //The starting point of the IBO  //glDrawRangeElements may or may not give a performance advantage over glDrawElements