opengl es can't draw wireframes easily, to do that you need to explicitly set the indices of your mesh t(or the order of the vertices) to draw the wireframe.
at some point we should add something that generates the correct triangles as an auxiliary mesh to draw the wireframe automatically in GLES but by now you need to do it manually.
the vertices as they are laid out with TRIANGLE_STRIP will draw like that when drawn with LINES (thaht's all that's happening when you draw the wireframe in GLES)
to draw it correctly you have to lay them out as if you were drawing triangles
