I'm currently using an older version of XGen to make my project compatible with my school's pipeline / renderfarm. Because of this, I don't have access to IG's awesome Width Ramp feature, which limits my ability vary the primitive's width along the primitive's length. Taper helps, but only gives me linear control in one direction (towards the tip).
Ideally I'd like to be able to thin the root, fatten the middle, then thin the tip. I imagine I could do that with expressions, but I don't know how to query the position along the length of the primitive. When I texture the primitive, i know that the position along the primitive length is the 'v' coordinate, but '$v' in the XGen expression editor references the 'v' texture coordinate of the surface the primitive grows out of.
Does anyone know how I could reference the position along the primitive's length in the XGen expression editor? Or how I could similarly vary the primitive width without the Width Ramp?
