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Does the order of P0,1,2 has to be counterclockwise in this algorithm? If not, can it be clockwise or even be a random order?


@ChrisZzh Great question (I think this was brought up on another slide as well). Yes, you have to be careful about winding order. How would you very easily check if the points are given in counter-clockwise order? And what would you do if they're not?


What are Ai, Bi, Ci here


@jkalapos from Ei, it's just rearranging terms and give coefficient another name...