@@ -897,8 +897,8 @@ function vector_axis(v1,v2) =
v1 = point3d(v1/norm(v1)),
v2 = point3d(v2/norm(v2)),
v3 = (norm(v1-v2) > eps && norm(v1+v2) > eps)? v2 :
(norm(vabs(v2)-V_UP) > eps)? V_UP :
V_RIGHT
(norm(vabs(v2)-UP) > eps)? UP :
RIGHT
) normalize(cross(v1,v3));
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