T3Tangent.unit

static t3toolbox.manifold.T3Tangent.unit(frame, index)

def unit(
        frame:  bvf.T3Frame,
        index,              # (use_tt_coordinate, i, within_index); see T3Variations.unit
) -> 'T3Tangent':

Canonical unit tangent at frame: variations zero except a single core entry.

index = (use_tt_coordinate, i, within_index) (see T3Variations.unit()). These units are the standard basis of the variation cores – an overcomplete, non-ambient-orthogonal generating set of the tangent space, not an orthonormal basis (gauge it yourself if needed).

Parameters:

frame (T3Frame)

Return type:

T3Tangent