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Makio64/gist:cffcbb652188c43c67c7a12555146857

Created September 1, 2017 20:15
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calculate normal
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gistfile1.txt
Math.cross :
[a1, a2, a3] and B = [b1, b2, b3] is defined as:
cross(A, B) = [ a2 * b3 - a3 * b2, a3 * b1 - a1 * b3, a1 * b2 - a2 * b1 ]
for 3 points :
vNormal = normalize( cross(pos2.xyz-pos.xyz, pos3.xyz-pos.xyz) )
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