class World(object):
    def __init__(self):
        self.verts_id = GLuint()
        glGenBuffers(1, self.verts_id)
        self.mesh = []
        for x in xrange(SIZE):
            for z in xrange(SIZE):
                self.mesh.extend((float(SIZE//2 - x), 0.0, float(SIZE//2 - z)))
        data = (GLfloat*len(self.mesh))(*self.mesh)
        glBindBuffer(GL_ARRAY_BUFFER, self.verts_id)
        glBufferData(GL_ARRAY_BUFFER, len(data)*4, data, GL_STATIC_DRAW)

        self.index_id = GLuint()
        glGenBuffers(1, self.index_id)
        self.index = []
        for x in xrange(SIZE-1):
            for z in xrange(SIZE-1):
                self.index.extend((x*SIZE+z, x*SIZE+z+1, (x+1)*SIZE+z))
                self.index.extend((x*SIZE+z+1, (x+1)*SIZE+z, (x+1)*SIZE+z+1))
        data = (GLushort*len(self.index))(*self.index)
        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, self.index_id)
        glBufferData(GL_ELEMENT_ARRAY_BUFFER, len(data)*2, data, GL_STATIC_DRAW)


    def draw(self):
        glPolygonMode(GL_FRONT_AND_BACK, GL_LINE)
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
        glLoadIdentity()

        gluLookAt(0.0, 25.0, -45.0, 0.0, 0.0, 0.0, 0, 1, 0)

        glEnableClientState(GL_VERTEX_ARRAY)
        glBindBuffer(GL_ARRAY_BUFFER, self.verts_id)
        glVertexPointer(3, GL_FLOAT, 0, 0)

        glEnableClientState(GL_INDEX_ARRAY)
        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, self.index_id)
        glDrawElements(GL_TRIANGLES, len(self.index), GL_UNSIGNED_SHORT, 0)

        glFlush()