vector - cross product in TinyOs? -

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how can make cross product between 2 vector in tinyos (nesc)?

if have position=p1+x*ex+y*ey;; ex,ey: vector.

i searching couldn't find thing helped !!!

so there helpful way ? if go definition of cross product there angle don't how 2 vector ?

if have 2 vectors , b (a = (a1, a2, a3) , b = (b1, b2, b3)) cross product can computed using following formula:

a x b = (a2*b3 - a3*b2, a3*b1 - a1*b3, a1*b2 - a2*b1)


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