import Blender
from Blender import NMesh
from math import *

def add_face(m, inds):
    f = NMesh.Face()
    for i in inds:
        f.v.append(m.verts[i])
    m.faces.append(f)

def create_tetra():
    me = NMesh.GetRaw()

    for v in [[1,1,1],[-1,-1,1],[-1,1,-1],[1,-1,-1]]:
        me.verts.append(NMesh.Vert(v[0],v[1],v[2]))

    for inds in [[0,2,1],[0,1,3],[0,2,3],[1,2,3]]:
        add_face(me, inds)

    obj = NMesh.PutRaw(me, 'tetra', 1)
    obj.name = 'tetra'

cf = Blender.Get('curframe')
if cf == 1:
    create_tetra()

tetra = Blender.Object.Get('tetra')
angle = (2*pi*cf)/100
tetra.LocX, tetra.LocY = 5*sin(angle), 3*cos(angle)

#Blender.Redraw()