inside triangle

%inside_triangle is used to check if a point P is inside%the triangle P1P2P3 or not.%%Inputs: P, P1, P2 and P3 are vectors of length 2 or three of the% form [x y z] or [x y]%%Output: True%True=1 => P is on or inside P1P2P3%True=0 => P is outside...