[Bf-funboard] Subdividing Tris into tris (XSI Style)

[ZanQdo]

Hi, I love this feature of XSI subdivition, made a gif about it:

http://dogfight.3developer.com/SubTris2Tris.gif

it subdivides triangles to triangles instead of making quads and keeps a
very smooth shape, could this be done with blender?
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