1. Star Upper ratio calculation on start facet example highlighted with pink:
| Note |
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| All calculation are performed in 2D. Model is projected on table facet plane |
1.1 Draw a line a through start facet edge belongs to table. Line will separate plane into surfaces β and δ.
1.2 Find most distant point (call it B) on start facet from line a. A is point, where perpendicular from point B is crossing line a:
1.3 Find most distant point on girdle (call it D) from line a, pint should belong to β surface. C is point, where perpendicular from point D is crossing line a:
1.4 Start Upper ratio is |AB| length divided by |CD| length.
In projection on Table plane, for each Star facet:
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