Ok. So i finished full and segment(or range) edge ring selection block.
Also finished full edge loop selection. But edge loop segment(range)
selection is a tricky one.
It definitely use different approach to collect edges.
http://c2n.me/3LCDqzC

First i tryed to creat CLine primitive from center of first selected edge
(lmb) to second selected edge (lmbx2).
Then one by one we project first edge vertex neighbor edges onto CLine and
get edge with max Parameter value. But it doesn't work right.
It also doesn't work if we smply get distance to vertex neighbor edges
(with no projection onto CLine).

I assume that edge loop range algorithm also use dot_product and
collinearity.
But i still didn't figure it out how.
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