Function curved_roller_vertex 

pub fn curved_roller_vertex(
    rest: [f32; 3],
    normal: [f32; 3],
    tangent: [f32; 4],
    uv: [f32; 2],
    current: RollerFrame,
    previous: RollerFrame,
    plan: &[[f32; 4]],
) -> DeformedRollerVertex