VEC = PLANENORMVEC(PT1,PT2,PT3) calculats the normal vector of a plane that includes three points PT1, PT2, and PT3. When the plane is expressed as ax + by + cz = 1, VEC(1) = a, VEC(2) = b, VEC(3) = c. Points should be a 1 x 3 vector, specifying x, y and z values for each column.
p1 = [3,4,5];
p2 = [8,-4,0];
p3 = [0,0,1];
vec = planenormvec(p1,p2,p3);
Yo Fukushima (2023). planenormvec (https://www.mathworks.com/matlabcentral/fileexchange/7239-planenormvec), MATLAB Central File Exchange. Retrieved .
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