in src/warping.py [0:0]
def _to_absolute_positions(self, warpfield, seq_length):
# translate warpfield from relative warp indices to absolute indices ([1...T] + warpfield)
temp_range = th.arange(seq_length, dtype=th.float)
temp_range = temp_range.cuda() if warpfield.is_cuda else temp_range
return th.clamp(warpfield + temp_range[None, None, :], min=0, max=seq_length-1)