AS3 and 3d in a nutshell

To do 3d you need a bunch of poins in 3d. On which you apply rotations and translations.

The final step is to project those 3d points in 2d,projecting them on to a projection plane. (x,y,z)->(x₁,y₁).

And here's how you do it: 3D Projection

In conclusion : a Vector of Vector3d and transform.matrix3D methods.