UT3Tangent.stack_frame

static t3toolbox.uniform_manifold.UT3Tangent.stack_frame(tree)

def stack_frame(tree) -> 'UT3Tangent':

Stack a C-shaped tree of single-base-point tangents into a frame-stacked UT3Tangent.

Inverse of unstack_frame(). The leaves sit at different base points, so no shared-frame identity is required; they must share the padded dims (d, N, nU, nD, rL, rR), the real mode shape, and the tangent stack K – but the ranks/masks MAY differ across the frame stack ``C`` (varying-rank stacks are supported). The bases stack over the inner frame stack C (so the variation stack becomes K + C).

Return type:

UT3Tangent