### to prepare ###

arr = [(float(x)/(size-1),float(y)/(size-1))
            for x in xrange(size)
            for y in xrange(size)]
arr = np.require(arr, 'f')
self.vbo = OpenGL.arrays.vbo.VBO(arr , 'GL_STATIC_DRAW')

### to use ###

self.vbo.bind()
glEnableClientState(GL_VERTEX_ARRAY)
glEnableClientState(GL_TEXTURE_COORD_ARRAY)
glTexCoordPointer(2, GL_FLOAT, 0, None)
glVertexPointer(2, GL_FLOAT, 0, None)
glDrawArrays(GL_POINTS, 0, N_PARTICLE)
glDisableClientState(GL_VERTEX_ARRAY)
glDisableClientState(GL_TEXTURE_COORD_ARRAY)
self.vbo.unbind()