static const GLfloat disk_vertex_buffer_data[] = { // quarter 1 0.0f, 0.0f, -1.0f, 0.707f, 0.0f, -0.707f, 0.612f, 0.354f, -0.707f, 0.0f, 0.0f, -1.0f, 0.612f, 0.354f, -0.707f, 0.354f, 0.612f, -0.707f, 0.0f, 0.0f, -1.0f, 0.354f, 0.612f, -0.707f, 0.0f,…