Major Edge can be on Right Side

top.lines

Bottom Triangle

Top Triangle

bot.lines

Eleft.bot

Eright.bot

Eleft.top

Eleft.top

Only difference in algorithm is assignment of left, right sides:

for bottom triangle : Eleft = Ebot, Eright = EMaj

for top triangle: Eleft = Etop, Eright = EMaj

Slope is negative for Ebot, positive for Etop

EMaj

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