Figure 7
Illustration of the geometric configuration of laths. (a) An illustration of a fixed configuration. The lath plane (in red) is fully described by its normal (solid red arrow) or by two non-collinear vectors in the plane (dashed blue arrows). (b) The cross section by two observation planes (shaded in gray) gives laths extending along the blue directions (intersection of lath plane and observation plane). Any cross section of the lath plane has a principal direction in two dimensions that is a basis vector of the lath plane in three dimensions. At least two (non parallel) cross sections are required for full determination of the 3D lath normal. |